Method for control of gas release from stripped area

FIELD: mining.

SUBSTANCE: fresh air is supplied into mining face due to general shaft depression along two courses that delineate extraction pillar. It is discharged along course maintained behind mining face. In zones of active gas release of approximate beds, air impermeable throughput brattices are erected to form gas draining chamber. Part of stripped area adjacent to the latter is zone of methane trapping. Flow of air-methane mixture is formed. One part of flow is drained along gas-draining course into outward line of extraction site. The other one is discharged from stripped area outside the limits of extraction site. Between mining face and zone of maximum gas release of developed bed an additional throughput brattice is installed. The other part of air-methane mix flow is pushed aside in the area of impact of throughput brattices of gas draining chamber in direction of developed bed unloading zone arrangement. Flow of air-methane mix pushed aside is captured in wells for degassing. They are drilled in advance to form gas-draining chamber from maintained course into zone of developed bed unloading. Mouths are arranged behind project area, where gas draining chamber throughput brattice is erected. Bottoms are arranged in zone of maximum gas release of developed bed. Additional throughput brattice is initially installed in course maintained behind mining face in area, where its vertical plane matches vertical plane passing through point, which is projection of bottom in the well nearest to mining face for degassing onto ground of stripped area, and line being perpendicular drawn from specified point to the limit between maintained course and stripped area. As mining face advances, it is displaced in direction of extraction pillar development.

EFFECT: increased efficiency of methane removal, provides for the possibility to create reserve for increased load at bottom.

4 cl, 7 dwg

 

The invention relates to the mining industry, in particular to a method of control of emission from the goaf in the development of the Suite vysokogazonosnyh contiguous coal seams performed to extract the contained methane gas that reduce energy gazoobilnosti excavation sites and increase the load on the longwall face.

A known method of controlling the emission from the goaf, including fresh air to Oistamo culling through mine depression for two contour extraction pillar workings in straight flow diagram ventilation with podviganiem outgoing jet and tap it supported for clearing face the formulation (1).

The disadvantage of this method (1) is that it is not possible to effectively control the emission, since the leakage of air flowing through the tumbled rocks of the roof goaf and coming into supported for clearing face production, is the leaching of methane for clearing face supported in production as from the bottom zone of the producing formation, and periodically manifested zones of secondary sludge the main roof, which increases the gassing supported in production. Since the removal of methane from the goaf in re the implementation of this method is based on the use of the only means of ventilation, the concentration of methane in the supported for clearing face the development in the periods of manifestation of secondary sludge main roof often reaches a critical value that leads to the stops of the treatment works and reduce the load on the working face, especially when developing a Suite of coal seams with high natural methane content.

A known method of controlling the emission from the goaf in the development of the Suite of coal seams, one of which is work first, including fresh air to Oistamo culling through mine depression for two contour extraction pillar workings in straight flow diagram ventilation with podviganiem outgoing jet and tap it supported for clearing face on the border with goaf development, and removing methane from the goaf are not only means of ventilation with flow methane-air mixture generated by the leakage of air issued from the stope through the goaf at the expense of mine depression supported in part conveyor generation and odswiezenia it but the means of degassing by kartirovanija part of the flow methane-air mixture flowing through the worked-out space, degasification wells, proberen the m in the undermined coal spoil the thickness of the supported for clearing face framing towards the goaf (2).

The disadvantage of the method of controlling the emission from the goaf (2), based on the use of schemes of ventilation and degassing excavation site with once-through scheme ventilation with podviganiem outgoing jet, according to the normative document (2), is that the process of airing stope and supported for clearing face generation and the degassing process undermined satellites, technologically unrelated, do not provide the opportunity at this stage to control the emission in order to adjust the parameters of degassing (concentration and flow rate of methane in the process of podvigina stope to provide and remove methane-air a mixture of goaf increased concentration.

A known method of controlling the emission from the goaf in the development of coal seams, one of which is work first, including contour extraction column of air supply conveyor and ventilation development workings, definition of structure, power, and strength of rocks in the immediate roof of coal seam, the length of the active zone of the gas release and discharge reservoirs satellites, and also zone the maximum is wow outgassing undermined the seam-satellite fresh air to Oistamo culling through mine depression for two contour extraction pillar workings in straight flow diagram ventilation with podviganiem outgoing jet and tap it supported for clearing face develop, which are isolated from the goaf with installation after podvigina stope organ number and construction of the insulating wall to form between them mine workings, and as podvigina stope in the insulating wall perform drainage boxes that prior to their work tightly close. Simultaneously with the formation of the mine workings supported in developing construct a mine chamber, at the junction to which part of the goaf power surrounding coal thickness is formed, the zone of capture of methane. And mine chamber erected in the area of active gas reservoirs-satellites and perform relatively stope from the front and back parts. Each of them includes a part of the insulating wall with a drainage box, a pass-through jumper with ventilation door, adjacent to the entrance lintel guide wall, which is constructed along the supported excavations, adjacent to the guide wall in front and behind her protective lattice re ordci, in this lattice the partition adjacent to the wall jumper, together with the latter performs the function of a breathable wall jumper. Simultaneously with the removal of the outgoing stream from the stope through leakage of air when passing them through the goaf and organ a number of mine workings generate a flow of methane-air mixture, one part of which is devoting on mine development in outbound excavation area at the expense of the device in the isolating wall drainage Windows and education mine cameras supported in developing, providing after odswiezenia it take away this part of the flow from areas of active gas reservoirs-satellites of methane gas. At the same time to remove the outgoing stream from the stope through air leakage significantly different essential part of being created in the developed space flow methane-air mixture is directed to a depth goaf outside the excavation area, namely in the outbound vent area vent wells with complex gazettelive equipment, including suction pipe and gazettelive fan, which is installed at the mouth of the suction pipe, the opposite end of which is passed through the insulating var is CCW, built in additional generation, which is passed from the vent production undermined the seam-satellite and is connected to the goaf of the developed layer by the above-mentioned wells drilled from suppressed ventilation generation working on the excavation of the post. While the front of mine cameras feature of stope at a distance less than the length of the section between clearing face and the beginning of the zone of active gassing narabatyvaem formations of satellites and the rear, respectively, at a distance less than the length of the section between clearing face and end of the zone of active gassing narabatyvaem layers satellites, and which is periodically transferred after podvigina stope ahead of the front of the jumper after the departure of the stope from the front of the mine chamber to a distance not exceeding the length of the zone of active gassing undermined formation of the satellite. This supported the development when working in difficult mining and geological conditions, for example if there is a particularly close vysokogazonosnyh narabatyvaem coal seam satellites, ahead of the front part of the mine chamber on the stage of its construction between clearing face and the zone of maximum outgassing from podrabatyval the constituent of the seam-satellite impose additional checkpoint jumper with ventilation door, providing more active admission to mine an additional part podviewer air of the supported output. The described cycle control emission from the goaf as waste stope from mine cameras repeat (3).

This method is designed to control the emission from the goaf in the development of coal seams with high methane content, as it allows the removal of methane from out space with no means of ventilation and range of additional technical means, namely mine cameras and gazettelive equipment, using which the concentration of sucked from the goaf methane-air mixture is limited in this case, according to the safety rules, the maximum admissible value not exceeding 3.5% of methane, and then diluted ventilation air to the outgoing ventilation area to a concentration of not more than 1% methane.

The actual way with regard to conditions of occurrence Suite vysokogazonosnyh contiguous coal seams, one of which worked out first, i.e. in terms periodically unloading vysokogazonosnyh surrounding coal strata, which is accompanied by the release of the C it of methane gas and the removal of one part of the methane-air mixture for mine development in outbound excavation of the site, flowing through the goaf, and another part of the flow of a methane-air mixture outside the excavation area, thereby providing supported for clearing face develop maximum allowed according to the rules of security, the level of methane concentration. It follows that this solution eliminates the disadvantages inherent analogues (1 and 2). Therefore, it can be considered more effective due to the removal of methane as possible, as mentioned above, the concentration of the goaf with the help of the above technical means, and due to this, accordingly enabling the establishment of a reserve to increase the load on the working face. Because this method on most of the essential features coincides with the claimed invention, the method (3) was adopted as a prototype.

However, despite the presence of additional jumpers used in difficult mining geologicheskikh conditions and provides additional deformation of a methane-air mixture towards the goaf due to its aerodynamic drag, it is the same as the method in General, no significant effect on the reduction process of gazoobilnosti excavation of the site, as elements gazogeneratornoj system of ventilation area, Lucaya in the discharge zone surrounding coal strata, supported for clearing face conveyor production, mine camera, built in supported development at the junction with an insulating wall is made of drain Windows and flowing through the goaf and organ a number of mine production due to mine depression leakage of air, forming a stream of a methane-air mixture together and creating together the conditions for its removal or transfer to a depth of goaf another part of this thread and delete this part of the goaf with gazettelive equipment, represent the only means of ventilation.

In a physical sense in this way the part of the developed space adjacent power surrounding coal strata to the mine chamber and through which by forcing occurs in the depth of the developed space allocated to the ventilation hole is another part of the flow methane-air mixture, is svezheubrannoy the mined-out area, being the area of the capture of methane. Under the zone of capture of methane means adjacent to mine the camera part of the goaf influenced by backwater mine depression with walk-through jumper and has properties to the lecturer. Area capture of methane is limited by the length of the mine chamber or the length of the section between the through vias. Mentioned area does not change its position relative to mine the camera when doing cleaning work. Its length in the process of podvigina stope remains almost constant. Since this case uses only means of ventilation, to increase the length of this zone and, accordingly, the amount of methane that can be deleted using this method in this zone goaf, is not possible. Especially it is not possible in case of increasing load on the working face when the amount released from the unloading coal spoil thickness of methane increases, and the amount of excavation on a parcel of air remains the same.

Particularly noteworthy is also the fact, when the sewage work is complicated by the influence of two or three of mining and geological factors, such as the depth of the development and availability of contiguous vysokogazonosnyh coal seams. In this case there is a need to use additional jumper, constructed between clearing face and the zone of maximum outgassing, i.e. ahead of the mine chamber. The associated additional deformation of a methane-air mixture in the direction of a goaf depends on the ability oroshaemykh breeds to ensure proses in depth goaf of the total volume of the emerging stream of methane-air mixture, there may not always be proso mentalemotional mixture and the possibility of capture of methane using, as in this case, the vent wells. In this case, under the influence of gravitational forces collapsed in mined-out space rock of the roof become compressed, compacted, reducing their permeability, starting from the mounting chamber, and vent wells drilled in the vicinity of the mounting of the camera, is significantly reduced.

In connection with the above mentioned method is characterized by the insufficient efficiency of the process of removal of methane from the unloading area undermined layer, since for these purposes is not using more sophisticated tools, namely tools degassing, the use of which does not require additional air flow for dilution removed from the goaf side of the flow methane-air mixture. It follows that the application of this method constrains the further increase in the load on the working face. In addition, in the method prototype (3) not resolved the question of the formation of hot zones are formed in the discharge zone in the area between the additional jumper and the zone of methane released in the process of podvigina stope. These drawbacks reduce the efficiency of this method.

Objective of the claimed invention, I have provided is a method of control of emission, which provides the extraction of methane gas of high concentration and flow rate of the goaf, the movement of the pushed part of the flow methane-air mixture from the unloading area undermined the formation in the zone of capture of methane generated by the power discharged surrounding coal strata at the junction to mine the camera from out space in conjunction with wells for degassing.

The technical result is achieved the task, expressed in the intensification of kartirovanija methane from the unloading area surrounding coal strata, increasing the flow rate of methane in the mining area per degassing, and thus to provide the possibility of increasing the load on the working face and the security of wastewater treatment works on the gas factor.

To achieve these objectives with the claimed technical result in the method of controlling the emission from the goaf in the development of the Suite vysokogazonosnyh contiguous coal seams, providing for the development of one of the first and including intake conveyor and ventilation development workings, which contour extraction column, definition of structure, power, and strength of rocks in the immediate roof of coal seam, the length of the active zone of ha is vydeleny undermined and narabatyvaem coal seams, the length of the zone of discharge undermined and narabatyvaem coal beds and zones of maximum outgassing undermined reservoir, a supply of fresh air to Oistamo culling through mine depression for two contour extraction column of air supply conveyor and ventilation workings in straight flow diagram ventilation with podviganiem outgoing jet and tap it supported for clearing face conveyor generation, which is isolated from the goaf with installation after podvigina stope organ number and construction of the insulating wall to form between them mine workings, upon podvigina stope supported for clearing face development in the areas of active gas undermined and narabatyvaem layers build breathable through jumper with formation of one pair of mine chamber, adjacent to which the part of the developed space is a zone of capture of methane, and the nearest of stope breathable pass jumper, which is the front bulkhead, erect from him at a distance equal to not more than the length of the section between clearing face and the beginning of the zone of active gassing narabatyvaem layer is in, and the other more remote from the stope jumper, which is the rear bulkhead, respectively at a distance equal to not more than the length of the section between clearing face and end of the zone of active gassing narabatyvaem layers, while the rear pass jumper periodically transferred after podvigina stope ahead of the front of the jumper after the departure of the stope from the front of the jumper to a distance not exceeding the length of the zone of active gassing undermined layer, simultaneously with the removal of the outgoing jet stope in a supported production through leakage of air when passing through the mined-out area through mine depression generate a flow of methane-air mixture, one of which is devoting on mine development in outbound excavation of the site, pre-diluted in it and mine the camera podsuetivshis air, and another is an essential part created in the developed space flow methane-air mixture away from the space outside the excavation area, under construction breathable pass jumpers for education for mine clearing face the camera ahead of the front wall jumper between clearing face and area poppy is kalinago outgassing undermined reservoir impose additional checkpoint jumper according to the claimed technical solution challenge another part of the flow methane-air mixture from the goaf is carried out by forcing it in the area of influence anadromous jumpers in the direction of arrangement of the discharge zone undermined layer, simultaneously with which due to backwater mine depression is a redistribution layer this part of the flow of a methane-air mixture by the power of the discharge zone, depending on their concentration of methane and accordingly the distribution in the direction of arrangement of the upper layers of this zone to the unloading zone of capture of methane, which produces kartirovanie pushed part of the flow methane-air mixtures in wells for degassing, which Buryats to the formation of the mine chamber supported for clearing face production in the area unloading undermined reservoir, estuary, each of whom come behind the design space construction breathable each passing jumpers mine camera, and her face is in the zone of maximum outgassing undermined reservoir, and drilling of each well for degassing operate outside the influence of the secondary precipitation of the main roof, with additional checkpoint jumper originally installed in the supported for clearing face of verboden place, in which its vertical plane coincides with a vertical plane drawn through the point which is the projection of the face from the nearest stope well for degassing on soil goaf, and the line which is the perpendicular from a given point on the boundary between the supported development and goaf, and then as podvigina stope this jumper is transferred in the direction of longwall pillar to form in the discharge zone zone transfer to transfer additional tasneema part of the flow methane-air mixture between each new installation location of this jumper and area of capture methane, and simultaneously with kartirovanie pushed part of the flow methane-air mixture as podvigina stope continuously record the values of its concentration and flow rate to control for the level of changes in these parameters in the future, as soon as the level of concentration of methane-air shifts will be reduced to the minimum acceptable according to safety rules, values form the following mine the camera after drilling the next hole for degassing a repetition of the cycle of collecting methane from the zone of maximum outgassing undermined layer.

Moreover, in the construction breathable bushing is of eremitic for education mine cameras with simultaneous formation of a zone of capture of methane in pipeline development ahead of the stope additionally construct, at least two air-permeable bushing jumper with the formation of the ventilation gateway intended for redistribution of flow supplied to Oistamo the bottom of the air in such a way that a large part of which goes to Oistamo slaughter on vozduhopodajushchej ventilation generation.

Moreover, fixing the values of the concentration of the methane-air mixture flow rate is performed by means of apparatus for remote monitoring of methane placed in supported the development on the nearest exit from the stope well for degassing connecting it to the degassing network.

It is expedient as mentioned equipment use measuring device based on measurement of the concentration and flow rate of methane, for example, the control apparatus efficiency ghatotkacha installations CIRCLE.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical sources, has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all the essential features of the claimed invention set forth in the claims.

Therefore, the claimed technical solution meets the conditions of patentability of an invention is "new".

The causal link between the claimed combination with the social characteristics and achievable technical result is the following.

Sign - outlet another part of the flow methane-air mixture from the goaf is carried out by forcing it into the area of influence anadromous jumpers mine chamber in the direction of arrangement of the discharge zone undermined layer, simultaneously with which due to backwater mine depression is a redistribution layer this part of the flow of a methane-air mixture by the power of the discharge zone, depending on their concentration of methane and accordingly the distribution in the direction of arrangement of the upper layers of this zone to the unloading zone of capture of methane, which produces kartirovanie pushed part of the flow methane-air mixtures in wells for degassing, which Buryats to the formation of the mine chamber supported for clearing face in production the discharge zone undermined reservoir, estuary, each of whom come behind the design space construction breathable wall jumpers mine camera, and her face is in the zone of maximum outgassing undermined strata - yavlyaetsya fundamental and creates conditions for solving the task, namely through the use of wells for degassing, technologically linked with breathable wall lintels, and thanks podporu this part of the flux is in the zone of influence of each of these jumpers podsuetivshis air, flowing through supported for clearing face develop, it is possible not only to push this part of the flow in the zone of influence of anadromous jumpers towards the goaf in the direction of arrangement of the upper layers of the unloaded zone of the undermining of the reservoir, but the preload this part of the stream of methane-air mixture. However due to the effect mentioned backwater and properties of buoyancy methane is a redistribution of this part of the stream of methane-air mixture with regard to its density, changing the capacity of the unloading zone. Layers of a methane-air mixture with the highest content of methane under the influence of backwater mine depression emerge in the direction of the upstream floating layers surrounding coal strata, forming a zone of methane released not only by the length of the mine workings, as in the prototype (3), but also on the capacity of the unloading zone. That is, the preload and the redistribution of the inferior part of the flow methane-air mixture contribute to the increase of methane concentration, particularly in the upper layers of the discharge zone, and due to the presence of communication between moving in the discharge zone under the influence of backwater pushed part of the flow methane-air mixture and vacuum wells for degassing is achieved kartirovanie methane increased concentration.

The location of the bottom of the IC is ageny for degassing in the zone of maximum outgassing undermined layer indicates the overlapping zone of influence of the well for degassing and the zone of maximum outgassing, what contributes the most complete extraction of methane gas from the goaf.

This way the amount of developed space, i.e. the zone of capture of methane as the length and power of the discharge zone, unlike the prototype (2), in which she only geometrically adjacent to the mine chamber in the absence of degassing unloading coal spoil thickness, contributes to the suction of increased methane concentrations from the unloading area due to the use of the means of degassing, which creates prerequisites for reducing gazoobilnosti goaf and accordingly increases the load on the longwall face.

However, the applicant, after an additional search known solutions in this field of technology in order to identify characteristics that match the distinctive features of the prototype of the features of the proposed technical solutions, found that known from the prior art described above, hallmark, but with a different set of essential features. This patent RF №2282030 "Method development Suite contiguous vysokogazonosnyh coal seams", CL IS 41/18, 2005 (4).

In this technical solution is the removal of methane from the goaf means of degassing is performed by forcing another part of the flow of methane is susnow mixture, flowing through the worked-out space near the unsupported part of the conveyor output, in the zone of influence of each of the through-jumpers gas gathering manifold in the direction of arrangement of the upper layers of the discharge of a rock strata undermined coal seam due to backwater mine depression, which then captious well for degassing drilled undermined the array of ventilation generation towards the goaf with orienting them so that each hive these wells are located in the zone of influence jumpers gas collector.

A positive property of this technical solution is that it allows the extraction of methane for clearing face of the discharged coal spoil the undermined strata strata through the use of air leakage and mine depression in the zone of influence of each of the cross-bridges. However, the duration of the process increased outgassing from unloading coal spoil column is stored, usually within two to three days, that is rather short-lived, as determined by the manifestation of periodically occurring secondary sludge the main roof. Moreover, as waste stope from the nearest from him the next Bush degasification wells recorded using samera the spike concentration and flow rate of methane-air mixture in the degassing wells occurs only in the period of manifestation of the primary or adjacent to the hive secondary precipitation of the main roof. The following primary secondary precipitation of the main roof have little influence on the formation parameters degassing referred to Bush as it begins to appear not the only factor increasing the length of the supported part of the conveyor production for clearing face, but also the influence of disturbance to its original state due to the occurrence of seats in either partial or complete blockages of its cross-section. In other words, the result of the adverse impact of mining pressure on the state of the conveyor develop slow leaks of exhaust air generated by the space close to both the supported and the unsupported part of this production and, accordingly, the concentration of the exhaust stream of a methane-air mixture, tasneema in the area of influence of the transverse bulkheads in the direction of arrangement of the upper layers of the discharge zone undermined contiguous coal seams. All this leads to a significant loss of quality of gas-dynamic parameters degasification wells in General and thus to reduce the possibility of their influence on the gas situation on the excavation site, inhibiting the growth of the load on the working face on the gas factor.

Thus, despite the known method (4) communication between the pressurized mine depression and vacuum digatal is the R wells due to the location of their hives in the zone of influence of the transverse crosspieces remove the above part of the flow methane-air mixture from the goaf is not stable, over time, decreasing the value of nature, and therefore sucked methane will not have postojano suitable for degassing concentration.

In the present method well for degassing drilled from preparatory development in the unloading area undermined reservoir and technologically linked with through jumpers mine chamber, thus forming a connection between the pressurized pushed part of the flow methane-air mixture and vacuum wells and accordingly facilitating the extraction of methane gas from the goaf high concentration irrespective of the frequency of manifestations of secondary sludge the main roof, and therefore the intensification of the process of extraction of methane from the unloading area surrounding coal thickness and correspondingly reducing gazoobilnosti goaf.

Comparative analysis shows that the removal of the inferior part of the flow myanonamouse mixture of goaf by kartirovanija it degassing wells on the well-known (4) and the proposed technical solutions does not confirm their identity, and therefore not podtverzdaetsa fame affected the distinctive trait specified by the applicant, the technical result is an increase in the concentration of methane captured by wells for degassing zone R is Grusky surrounding coal strata, the increase in flow rate of methane per degassing excavation of the site, and providing the possibility of increasing the load on the working face and the security of wastewater treatment works on the gas factor.

A sign - "the drilling of each well for degassing operate outside the influence of the secondary precipitation of the main roof"- indicates the most rational place drilling for degassing relatively close to the well zone of influence of the secondary precipitation of the main roof. The term "zone of influence of the secondary precipitation of the main roof" refers to the area of impact coming in the movement for clearing face of the rocks of the main roof, the resultant cavity wells for degassing, which can be directly in the zone of displacement of the rocks or, on the contrary, outside the impact zone. As practice shows, the inception of the wellhead and its subsequent drilling of the supported for clearing face framing on the distance from the bottom equal to not less than 2.0-2.5 steps collapse trudnoreshaemyh main roof, does not adversely affect the drilling of the well. During the drilling of wells at a closer distance from the bottom (1.0-1.5 step collapse of the main roof) due to the influence of the budding process of displacement and collapse of the rocks of the main roof is jamming or clamping of the drill is Ronny and therefore its loss. Thus, the drilling of wells for degassing closer than is indicated in the formula, the distance from the bottom is not possible.

Sign - "additional breathable pass jumper originally installed in the supported conveyor working at a place where its vertical plane coincides with a vertical plane drawn through the point which is the projection of the face from the nearest stope well for degassing on soil goaf, and the line which is the perpendicular from a given point on the boundary between the supported development and goaf, and then as podvigina stope this jumper is transferred in the direction of longwall pillar to form in the discharge zone zone transfer of methane to migrate additionally tasneema part of the methane-air mixture between each new the installation location of this jumper and area of capture of methane" - regulates the conditions of site selection the initial installation of additional jumpers supported for clearing face development in the area between clearing face and mine camera, i.e. ahead of the zone of capture of methane adjacent to the mine chamber and from the nearest stope pair of wells for degassing. the fact contributes to zone transfer to transfer additional tasneema part of the flow methane-air mixture, which as advancing this jumper after podvigina stope gradually increases and ends in the following formed for clearing face area maximum outgassing undermined layer. Because of this, as well as linking to the original place of installation of additional jumpers with borehole bottom, namely in the zone of maximum outgassing undermined reservoir is not interrupted aerogasdynamic communication, facilitating instant transfer tasneema part of the flow methane-air mixture of high concentration from the discharge zone through a zone transfer of methane from the place of installation of the additional movable jumpers in the zone of capture of methane. This indicates that the device additional jumpers supported the development, according to the above-mentioned conditions, an effective impact on the process of kartirovanija of methane gas from the goaf.

The zone of capture of methane adjacent side goaf to mine the camera and to the nearest of stope pair of holes for drainage, and the area of transfer of methane from the zone of maximum outgassing at the first stage (i.e. taking into account the influence of the initial place of installation of additional jumpers) are almost the same in the discharge zone, the undermining of the reservoir, to provide the first high quality settings degassing.

In the process of shifting more breathable wall jumper as podvigina stope, accompanied by an increase in the length of the arch oroshaemykh roof rocks and correspondingly increase the length of the discharge zone for clearing face, increase the volume and length of the goaf. In the rocks of overlapping strata arise plastic deformation, which leads to delamination of the upper layers surrounding coal strata. In the upper limit of the discharge zone is moved even higher, involving the General flow of methane-air mixture for more, including stagnant zones (cavities stratification of rocks), a wholly-owned volume fraction of methane, thus creating conditions for increasing the flow rate of captured methane-air mixture well for degassing due to the erection of additional jumpers.

Sign - "and while kartirovanie pushed part of the flow methane-air mixture as podvigina stope continuously record the values of its concentration and flow rate to control for the level changes of these parameters is necessary to control for changes in quality parameters in underground excavation site, they will judge the degree of gazoobilnosti.

Sign in dalnas is m, as soon as the level of concentration of methane-air mixture will be reduced to the minimum acceptable according to safety rules, values form the following mine the camera after drilling the next hole for degassing a repetition of the cycle of collecting methane from the zone of maximum outgassing undermined layer" - indicates that the minimum value of the concentration of methane-air mixture judge about the end of the cycle of collecting methane gas from the goaf, and to commence the next cycle.

Sign (2 formulas) - "in the construction breathable pass jumpers for education mine cameras with simultaneous formation of a zone of capture of methane in pipeline development ahead of the stope additionally construct, at least two air-permeable bushing jumper with the formation of the ventilation gateway intended for redistribution of flow supplied to Oistamo the bottom of the air in such a way that a large part of which goes to Oistamo slaughter on vozduhopodajushchej ventilation generation" - indicates the distribution on the adjacent Oistamo slaughter workings of the amount of air, much of which is directed through the vent for the development of education of the incoming air flow. what it allows you to control the volume of air leakage, namely, to increase their volume and volume respectively degirolamo using wells for the degassing of methane-air mixture, ensuring the best performance parameters in underground mining area, and it generally affects the increase in the length of the wells.

The sign (item 3 in the formula) - "fixing the values of the concentration and flow rate of methane-air mixture is carried out by means of equipment for remote control of methane placed in supported the development on the nearest exit from the stope well for degassing connecting it to the degassing network of the mine," explains what technical means are fixing aerogasdynamic parameters methane-air mixture, to obtain the dynamics of change in these parameters.

Sign (4 formulas) - as mentioned apparatus using the device, based on measuring the concentration and flow rate of methane, for example, the control apparatus efficiency ghatotkacha installations CIRCLE" -in conjunction with the above topic are needed and specifically identifies the known from the prior art apparatus for carrying out the inventive method of controlling the emission from the goaf.

Thus, the set of essential features that characterize the essence of the proposed method will allow about is the ensure the exhaust gas elevated concentrations of methane from the zone of action of the wells for degassing beyond the excavation area and therefore increase the load on the longwall face by reducing the deterrent effect of outgassing.

All these technical effects allow you to increase the efficiency of the method of controlling the emission from the goaf stope.

From the above it follows that the essential features of the claimed invention are in causal relationship with achievable technical result and analysis of the prior art in this area is not clear to the specialist that characterizes the inventive step of the claimed technical solution.

The information set forth in the application materials to the invention, sufficient for the practical implementation of the invention.

The essence of the proposed method is illustrated by drawings, where: figure 1 shows the layout of contiguous coal seams in the retinue when developing one of their first cross section along the strike) and the distribution of areas of active gas from these reservoirs for power coal spoil array; figure 2 - scheme of a longwall pillar hosted conveyor develop a mine chamber, consisting of two air-permeable passage jumpers, and optional straight jumpers; figure 3 - section a-a in figure 2; figure 4 - the dynamics of change of methane concentration in the zone of active gassing undermined contiguous coal seam; figure 5 - the dynamics of change is concentratie methane in the zone of active gassing narabatyvaem contiguous coal seams; figure 6, a and b - dynamics of changes in the concentration and flow rate of methane via the described method according to instrumental measurements in the well, the mouth of which is located within the wall jumper 21 and over pass bridge 22, respectively (curves 1 and 2 respectively, the concentration and flow rate of methane).

The method of controlling the emission from the goaf considered by the example design Suite vysokogazonosnyh contiguous coal seams, which shall initially be the preparation of the mining of the pillar 1 by conducting intake vent 2 and conveyor 3 mines on layer 4 (figure 1, 2). Layer 4 work first as a protective against above and below in the retinue of contiguous vysokogazonosnyh layers 5, 6, 7 and 8. After the preparation of the extraction column 1 start its development clearing face 9. Conveyor production 3 support from goaf 10 for reuse and isolated from it by setting following podvigina stope 9 organ number 11 and the erection of the insulating wall 12 to form between them mine production 13. With some delay from the stope 9 of the supported production 3 in the areas of active gas 14 and 15, respectively podrubat is by 5 and narabatyvaem of 6-8 layers in rocks of the roof 16 of the developed layer 4 drilling of wells 17 for degassing. During the drilling of 17 wells for the degassing of them oriented in the direction of podvigina stope 9 so that upon completion of drilling each borehole 17 for degassing her face 18 were located in the zone of maximum outgassing 19 of the discharge zone 20 undermined layer 5. And after drilling each borehole 17 for degassing supported in developing 3 in zones 14 and 15 respectively 5 and undermined narabatyvaem layers 6-8 construct, respectively, the front and rear relative to Oistamo slaughter 9 breathable bushing jumper 21 and 22 with the formation of one pair of mine chamber 23. While the mouth 24 of each of the 17 wells for degassing feature behind the design space construction (conventionally not shown) breathable flow bridges 21 and 22. Moreover, at the junction to the mine chamber 23 from out space 10 in the upper layers (conventionally not shown) is formed in the zone of capture of methane 25. In other words, the zone of capture of methane 25 refers to the part of the developed space 10 having the properties of gas manifold for the flow of methane-air mixture increased concentration. Adjacent to the mine chamber 23 from goaf 10 area capture methane 25 is formed by zones of influence (the condition is not shown) passing bridges 21 and 22 mine chamber 23, and also due to backwater mine depression using air flow podsuetivshis the air, so that the vent stream flow near bridges 21 and 22 are tightened and part of the flow of air in one's pressing away towards the goaf 10, compressing and displacing thus in the direction of arrangement of the upper layers of the unloaded coal spoil thickness of working layer flowing through the worked-out space 10 flow methane-air mixture. Preload this thread contributes to the increase of methane concentration, particularly in the upper layers of the unloaded thickness due to their displacement capacity of the discharge zone 20 and redistribution of the density or concentration of methane in layers in the direction from bottom to top. Thus, in the process of podvigina stope 9 the influence of flow bridges 21 and 22, forming a mine chamber 23, provides a permanent mechanism tucked up and push on the power of the discharge zone 20 methane-air mixture and the formation of a zone of capture of methane 25. Area capture methane 25 begins to occur almost immediately after the construction of the mine chamber 23, that is, after the erection of flow bridges 21 and 22 and connecting wells 17 to degassing network of the mine.

In the process of podvigina stope 9 drilling of each well 7 for degassing carried out outside the zone of influence of each secondary precipitation (conventionally not shown) of the roof 16, periodically occurring for clearing face 9 in the discharge zone 20 undermined layer 5.

In addition, in the construction of permeable flow pamoramic 21 and 22, when the formation of the zone of capture of methane 25, it is expedient in the development pipeline 3 ahead of the stope 9 advanced build at least two air-permeable continuous lintel 26 with the formation of the ventilation gateway 27 to supply the greater part of the amount of air to Oistamo slaughter 9. At the same time with the removal of the stope 9 outbound streams through leakage of air when passing through the mined-out area 10 and organ number 11 mine production 13 and through the cavity of delamination and fracture zone (conventionally not shown) rocks of the immediate roof 28 of the developed layer 4 on the contact (not shown conventionally) of these rocks with the insulating wall 12 through mine depression generate a flow of methane-air mixture, one part of which follows mine development 13, and it is supported for clearing face 9 production 3 and later in outbound excavation site podviganiem the last one in mine development 13 and mine chamber 23.

Other positions are marked: the hot zone 29 is pushed back part of the flow methane-air mixture; charts 30 and 31 (figure 4 and 5), with the corresponding length of the active zone of the gas 14 and 15, respectively undermined layer 5 and narabatyvaem layers 6-8; of the discharge zone 32, 33 and 34 narabatyvaem layers 6-8; section 35, corresponding to the length of the zone of maximum outgassing 19 undermined layer 5; the floor 36 of the developed layer 4; sections 37 and 38, the length of which is determined by the distance between clearing face 9 and the beginning of the zone of active gassing 15 narabatyvaem of 6-8 layers and between clearing face 9 and the end of the zone of active gassing 15, respectively; additional checkpoint jumper 39; the vertical plane 40 (shaded); the point 41, which is the projection of the face 18 of the hole 17 for degassing on the ground 36 of the reservoir 4; line 42, which is perpendicular dropped from a point 41 on the border 43; border 43 supported between generation 3 and goaf 10; the zone of influence of the 44 wells 17 for degassing.

The method is performed as follows.

In the initial period of longwall pillar 1 determine the composition, power and strength of the rocks of the immediate roof 28 of the developed layer 4. These figures are determined by known methods and classifications VNIMI. Then determine the length of the active zone of the gas 14 and 15 (respectively figure 30 figure 4 and schedule 31 figure 5) undermined layer 5 and narabatyvaem layers 6-8 (figure 1), the length of the unloading zones 20 and 32, 33, 34, respectively, of the reservoir 5 and the layers 68, as well as the length of the zone of maximum outgassing 19 undermined layer 5 (section 35 figure 4).

The length of the zones 14, 15 and 20, 32-34, 35 is determined on the basis of measurements of the flow rate of methane degassing wells drilled on the undermined layer 5 and narabatyvaete layers 6-8 supported generation 3 for clearing face 9, according to the technological schemes of degassing.

Fresh air supplied to Oistamo slaughter 9 ventilation generation 2, and the outgoing stream divert supported for clearing face 9 of the conveyor formulation 3, which direct air to podswietlane (dilution) the outgoing jet excavation of the site. Conveyor production 3 isolated from goaf 10 after podvigina stope 9 by installing wooden organ number 11 and the erection of the insulating wall 12 (Churakova or Solomonovo) forming between them mine production 13.

Behind stope 9 2.0-2.5 step secondary precipitation of the main roof 16 by using a drilling machine, for example SBG-2 m of the supported production 3 in the areas of active gas 14 and 15 respectively of the layers 5, 6-8 periodically drilled 17 wells for degassing. Each hole 17 for degassing Orient prior to drilling in the direction of podvigina stope 9 thus, th is would upon completion of the drilling face 18 of each of the 17 wells located in the zone of maximum outgassing 19 of the discharge zone 20 undermined layer 5, and the mouth 24 of the bore 17 for degassing respectively behind the design space construction breathable each passing jumpers 21 and 22 mine chamber 23.

Then, as podvigina stope 9 and after the drilling of 17 wells for degassing supported for clearing face 9 formulation 3 in the areas of active gas 14 and 15 respectively of the layers 5 and 6-8 construct breathable bushing jumper 21 and 22 with the formation of each one of these one pair of mine chamber 23, relative to the bridges 21 and 22 which the mouth 24 of the bore 17 for degassing is focused behind the last.

Useful in the formation of the mine chamber 23 in pipeline development 3 ahead of the stope 9 to erect two continuous lintel 26 for the formation of the ventilation gateway 27, intended to supply the greater part of the air to Oistamo slaughter 9 ventilation generation 2.

The choice of construction walk-through bridges 21 and 22 relative to the stope 9 is determined by the active nature of the gassing Suite of contiguous vysokogazonosnyh coal seams 5, 6, 7, 8 relative to working on the first layer 4. As can be seen from the graphs 30 and 31 in figure 4 and 5, according to the results of instrumental measurements of methane concentration obtained during the development of the formation of the "Fourth" lava 1032-Yu at the Vorkutinskaya OA is "Vorkutaugol", directly in the developed space 10 for insulating wall 12 is constantly traced two zones of high concentration of methane or two areas of active gas 14 and 15. The presence of the nearest of stope 9 areas of active gas release 14 length 55-70 m, schedule 30 (figure 4), primarily due to the effect of undermining layer 5, accompanied by the formation of zones of higher outgassing 35 and maximum hasoutdata within the specified zone contiguous vysokogazonosnyh layer 5.

The second zone of active gassing 15, manifested for clearing face 9 with a length of 55-220 m, according to the schedule 31 figure 5 due to the influence of unloading zones 32, 33 and 34 from the rock pressure narabatyvaem coal seams 6, 7, 8, occurring in rocks, soil 36 of the developed layer 4. Therefore, in connection with the above, while construction of the mine chamber 23 from the nearest stope 9 pass jumper 21 is erected from out space 10 at a distance not exceeding the length of the area 37 between clearing face 9 and the beginning of the zone of active gassing 15 narabatyvaem layers 6, 7 and 8, and more remote from the stope pass jumper 22 respectively at a distance less than the length of the area 38 between clearing face 9 and the end you specified the e zone 15 (figure 5).

Through jumpers 21 and 22 are erected from tie beam in the form of frames of different configurations, sheathed in cross-sectional area supported generation 3 rubberized cloth with openings and gaps under conveyor becoming and track, respectively.

As podvigina stope 9 carry out the removal of methane from the goaf 10 by means of ventilation and degasification. Destruction of methane in the first case performed using flow methane-air mixture generated by the leakage of air, removed from stope 9 through collapsed rocks out space 10 through mine depression and then flows in the process of odswiezenia on pipeline development 3 in the outgoing stream of a coal-mining area. Outbound vent stream excavation of the site flows freely through the air-permeable continuous lintel 21 and 22 mine chamber 23. Another part of a flow of a methane-air mixture due to the influence of backwater mine depression, as well as resistance to flow bridges 21 and 22 of one's pressing away in a goaf 10 and being pushed, moves in the direction of arrangement of the upper layers of the unloaded coal spoil thickness of the discharge zone 20, acting in the zone of capture of methane 25, the length and capacity of which is covered by the zones of influence 44 is of Quain 17 for degassing (figure 2, 3).

At the stage of construction breathable walk-through jumper 21 and

22 for the formation of a mine chamber 23 ahead of the front wall jumper between 21 clearing face 9 and the zone of maximum outgassing layer 19 5 installing additional checkpoint jumper 39. The initial place of installation, the wall jumper 39 choose supported for clearing face 9 development 3 so that its vertical plane coincident with the vertical plane 40 is drawn through the point 41, which is a bottom projection 18 from the nearest stope 9 hole 17 for degassing on soil 36 goaf 10, line 42, which is perpendicular dropped from a point 41 on the border 43 supported between generation 3 and goaf 10. Moreover, the initial place of installation of additional jumpers 39 coincides with the zone of maximum outgassing 19 unloading coal spoil the undermined strata of the reservoir 5, and bottom 18 from the nearest stope 9 hole 17 for degassing.

The presence supported the development of 3 additional jumpers 39 contributes to the formation of hot zones of methane 29 additionally tasneema part of the flow of a methane-air mixture in the discharge zone 20 of the layer 5 in the area between this jumper 39 and area of capture of methane 25, p is item area of methane transfer 29 starts from the initial installation of additional jumpers 39 is formed in the developed space 10 due to backwater mine depression and resistance optional straight jumper 39, forming a zone of influence (conventionally not shown). The manifestation of this zone of influence of additional jumpers 39 contributes to its resistance and skid mine depression (figure 2).

Additional checkpoint jumper 39 may consist of two parts, the shifting of which can make towards podvigina stope 9 method of tandem so that the duration of the process of shifting additional jumpers 39 had a minimal negative impact on the process of forcing and transfer tasneema part of the flow methane-air mixture capacity unloading coal spoil strata through the hot zone 29 goaf 10 in the zone of capture of methane 25. Additional checkpoint jumper 39 pantograph-gateway-type build with the possibility of extremely rapid (within one to two minutes) in case you need it moved ahead of the mine chamber 23.

Control of emission from the goaf 10 is as follows.

Simultaneously with the removal of the outgoing jet stope 9 supported in generation 3 via air leaks, removed from stope 9, by passing them through the goaf 10 and organ number 11 mine production 13 and through the cavity of delamination and fracture zone (conventionally the e shown) rocks of the immediate roof 28 of the developed layer 4 on the contact (conventionally not shown) with an insulating wall 12 through mine depression generate a flow of methane-air mixture. Created by air leakage and advancing to the mine chamber 23 this stream is divided into two parts. One part of the flow methane-air mixture should be mine development 13 and supported for clearing face 9 production 3 as outbound excavation site podviganiem on mine development 13 and mine chamber 23. And outgoing stream of a coal-mining area in supported development 3 freely flows through the air-permeable continuous lintel 21 and 22 mine chamber 23.

Other significantly high concentrations of methane part created in the developed space 10 flow methane-air mixture flowing through the worked-out space 10 in the direction of the mine chamber 23 near supported for clearing face 9 of the conveyor generation 3, and under the influence of the flow resistance bridges 21 and 22 mine chamber 23 and zones of their influence (conventionally not shown), due to backwater mine depression, one's pressing away towards the goaf 10 in the direction of arrangement of the upper layers of the discharge zone 20 of the developed layer 4. Layers pushed part of the flow methane-air mixture with the highest content of methane under the influence of the mentioned backwater mine depression redistributed power zone Accel is narrow 20, surfacing in the direction of its upper layers. Due to the redistribution layers of the specified portion of the stream of methane-air mixtures with different concentration of power of the discharge zone 20 is the formation of the zone of capture of methane 25, which produce kartirovanie pushed part of the flow methane-air mixtures in wells 17 for degassing. Moreover, the mentioned area 25 is formed as a length of a goaf 10 of the discharge zone 20 (as in the prototype 3)and in the direction of the upper layers of the specified area 20, that is, the capacity of the latter. This also contributes to this well-known property of methane, as the emergence of it as increasing the concentration of the individual layers of a methane-air mixture and the height of the dome of the discharge column.

In addition to the above properties of methane, redistribution and removal from the goaf 10 tasneema part of the flow of a methane-air mixture by the power of the discharge zone 20 also contributes to and influence of vacuum wells 17 for degassing, which gives sustained the deformation of the specified stream in the direction of arrangement of the upper layers surrounding coal strata and the suction of them with the help of 17 wells methane-air mixture increased concentration and the corresponding flow rate, significantly reducing gazoobilnosti goaf 10 and stope 9.

The above-noted kartirovanie methane-air mixture from the zone of capture of methane 25 using wells 17 for degassing together with mine chamber 23 is amplified by the effect of an additional wall jumper 39, which is implemented in the present cycle management work out in two stages.

At the first stage simultaneously with kartirovanie methane-air mixture using wells 17 is achieved kartirovanie additional part of the flow methane-air mixture of a high concentration of goaf 10 due to the effect of forcing flowing through the goaf 10 additional quantity of air leakage in the direction of arrangement of the upper layers of the unloaded coal spoil the undermined strata of the reservoir 5, which is due to construction of additional passing jumpers 39 installed in supported for clearing face 9 formulation 3 in alignment with the above projection 41 of the bottom 18 of the hole 17 for degassing. The zone of capture of methane 25 adjacent to the mine chamber 23 from out space 10 and to the nearest of stope 9 pair of wells 17 for the decontamination and hot zone of methane 29 from the zone of maximum outgassing 19 undermined layer 5 is almost aligned in the discharge zone 20 of the reservoir 5. It is etiti, the area of methane transfer 29 is essentially a zone of influence of additional jumpers 39.

In the second phase kartirovanie additional part of the flow methane-air mixture is achieved due to the influence consistently carried out ahead of the mine chamber 23 advancing additional wall jumper 39 in the direction of longwall pillar 1. After each shifting additional jumpers 39 while providing a permanent backwater and the above-noted character of forcing an additional quantity of air leakage in the direction of arrangement of the upper layers of the unloaded surrounding coal strata is an instant transfer tasneema additional part of the flow methane-air mixture of high concentration from the discharge zone 20 or zone of partial discharge (not shown conventionally appear on the main areas of the roof 16 of the developed layer 4 and located mainly in the middle part of the stope 9)through the hot zone 29 from the place of installation of the additional movable wall jumper 39 in the zone of capture of methane 25. This means that the first stage of kartirovanija methane in the process of podvigina stope 9 and advancing additional jumpers 39 passes into the second. That is, after each of the mentioned shifting additional jumpers 39 track the t transfer advanced tasneema part of the flow methane-air mixture, the maximum concentration of methane in the capture zone 25 due to the above-backwater mine depression and forcing part of the air leakage in the direction of arrangement of the upper layers of the unloaded surrounding coal strata, which begins clearing face 9 immediately after the construction of the walk-through jumper wires 21 and 22 and connecting wells 17 to degassing network. Moreover, the zone of methane transfer 29 additionally tasneema part of the flow methane-air mixture starts from pervonachalnogo place of installation of additional jumpers 39, and further after each shifting after podvigina stope 9 its length is increased by the amount of shifting and ends in the following formed for clearing face 9 of the zone of maximum outgassing 19 undermined layer 5, the epicenter of the manifestations which in this case also, as with the first place of erection, coincides with the last place of its installation.

The cumulative effect of backwater mine depression and this model has an extra jumper 39 at all stages of its shifting provides additional amount flowing through the goaf 10 air leakage and accordingly, the deformation of this part of the stream of methane-air mixture of a high concentration in the direction of arrangement of the upper layers of the unloaded coal spoil the undermined strata of the reservoir 5, to transfer methane-air mixture of a high concentration of newly SF is Mironovskaya for clearing face 9 of the zone of maximum outgassing 19 of the discharge zone 20 undermined reservoir 5 through already increased the length of the zone of methane transfer 29.

Providing excavation of the site an additional amount of leakage of air flowing through the mined-out area 10, and put an additional part of the flow of a methane-air mixture in the direction of arrangement of the upper layers of the discharge zone undermined layer 5 with the subsequent transfer of this part of the stream of methane-air mixture in the zone of capture of methane 25 positive effect on the degassing process and the removal of the discharged coal spoil thickness of methane. The result was the nature of the forcing and migration of methane-air mixture of high concentration when changing the length of the zone of methane transfer 29 not only increases the flow rate of captured methane-air mixture wells 17 for degassing in combination with the mine chamber 23, and the distance between them along the length of the supported production 3.

In addition, simultaneously with kartirovanie tasneema part of the flow methane-air mixture from the goaf 10 as podvigina stope 9 continuously record the values of its concentration and flow rate to control for the level of changes in these parameters. Fixing these gas-dynamic parameters of a methane-air mixture is performed using any known apparatus for remote monitoring of methane, for example equipment RANGE (see source 5), which razmisha the t supported the elaboration 3 at the outlet from the nearest stope 9 wells 17 connecting it to the degassing network of the mine.

In the future, after podvigina stope 9, as soon as the level of concentration of methane-air mixture will be reduced to the minimum acceptable according to safety rules, values repeat the cycle control emission from the goaf 10. Why are drilling another hole 17, and the guide crosspiece 22, which is the rear bulkhead mine chamber 23 relative to the stope 9, is transferred ahead of the front wall jumper 21 by a distance not exceeding the length of the zone of active gassing 14 undermined layer 5, with the opportunity of education to the next or the next mine chamber 23, so that the newly formed stream of methane-air mixture and, accordingly, the instantaneous jump of the concentration and flow rate at the time of transfer tasneema part of this thread with the following extract methane from the zone of maximum outgassing 19 undermined layer 5. Additional jumper 39 is set as described at the beginning of the implementation of the described method.

A combination of factors, namely the presence of mine depression and zone capture of methane 25, common in the direction of arrangement of the upper layers of the discharge zone 20 undermined layer 5, and the influence of degassing causes the increase degazio is my methane-air mixture with providing high-quality gas-dynamic parameters of degassing, that is, the values of concentration and flow rate of methane-air mixture, captured by wells 17 to degassing from the upper layers goaf 10.

While it is possible to provide technological linkages between process ventilation (mine chamber 23 together with the zone of capture of methane 25 and an additional jumper 39) and degassing process (well 17 for degassing) to perform the continuous measurement of the concentration and flow rate of methane-air mixture, so that the accumulation of information about current settings degassing in specific geological conditions at specified linear and angular parameters of the 17 wells for degassing, according to the scheme degassing and ventilation relatively stope 9, to be able to make adjustments in this diagram, changing the settings, including distance between the holes 17 for degassing.

The following is an example implementation of this method in the experimental area during the mining of seam "Fourth" lava 1032-Yu at the Vorkutinskaya OJSC "Vorkutaugol".

So, from the graphs in Fig.6 (a, b) according to the results of instrumental measurements of the concentration and flow rate of methane obtained for each of the 17 wells for degassing, it is clear that the nature of changes in concentration (curve 1) and flow rate (curve 2) of methane in wells 17, whic is its respectively for passing the ridges 21 and 22, proceeds differently, which is associated with the presence and influence of additional wall jumper 39.

So, for 17 wells located behind the wall jumper 21, that is, nearest relative stope 9, changes in the concentration and flow rate of methane occurs in three stages (Figo).

In the first stage, since the connection hole 17 to the degassing of the network and the start of the measurements for three to four weeks, the flow rate of methane is reduced by 14%, however, the concentration of methane in methane-air mixture is 100%. At the second stage in the next four weeks, the concentration and the flow rate of methane decreases, respectively, at 40 and 58% relative to their initial level. The third stage lasting up to four weeks for the specified bore 17 is characterized almost stabilization of above degassing, with a positive impact roaming additional jumpers 39 is stored as parameter values degassing at this stage remain at a sufficiently high level (methane concentration is not lower than 40%, and the flow rate of methane to the level 6-5 m/min).

This fact indicates that the well 17 is still some slack relative to the critical value, then there is a reserve of 30% methane concentration at which or below the borehole 17 choke.

Ledue is to be noted, what is the length of the zone of methane transfer 29 between the additional wall jumper 39 and wall jumper 21 in the process of podvigina stope 9 changes, i.e. increases in the interval of transfer of additional jumpers 39 after podvigina stope 9. Correspondingly increases and the length of the zone of influence of the additional wall jumper 39 on the zone of capture of methane 25. Initially the length of the zone of methane transfer 29 and accordingly the zone of influence of the additional wall jumper 39 ahead of mine chamber 23 is according to drawing (conventionally not shown not shown) of 25-30 m, since each hole 17 for degassing is oriented at an angle of spread of 20-25° relative to the axis of the conveyor drift, and under a certain angle and directed towards podvigina stope 9. In these circumstances, the bottom 18 of the well 17 is shifted with respect to the wall jumper 21 at this distance (figure 2).

At the final stage of the displacement cycle optional straight jumpers 39, in which the length of the zone of its influence limited (100-110 m ahead of the mine chamber 23), what begins to witness a decrease in the concentration and flow rate of methane in wells 17 (conventionally not shown),there is a need in the drilling of 17 wells for degassing in another area of the project location to the wall jumper 21 according to the technology of the proposed method.

For 17 wells located behind the wall jumper 22, changing the settings degassing occurs in two stages (figb). In the first phase lasting three to four weeks observed decrease in concentration and flow rate of methane respectively by 8-10% and 20-23% relative to their initial values. The subsequent stage up to six or seven weeks is also characterized by the decline of degassing. However, in this case, the concentration of methane remains at the level of 50-55% at a constant flow rate at the level 5-4 m /min, which indicates the ongoing impact of the additional wall jumper 39.

Thus, the use of walk-through bridges 21 and 22 together with 17 wells for degassing and floating in time and space additional wall jumper 39 in the area of active gas surrounding coal thickness for clearing face 9 provides a manifestation of increased parameter values degassing, i.e. the concentration and flow rate of methane, which is associated with the presence of additional backwater due to mine depression from additional jumpers 39 on the area between the mine chamber 23 and the jumper 39. The presence of ventilation and degasification systems, i.e. mine chamber 23 and 17 wells for degassing allows not only to predict the output parameters of the wells 17, that is what oncentration and the flow rate of methane, but also to control the degassing process, altering the parameters of wells, such as well spacing, length, and diameter wells.

After longwall pillar 1, prepared by the layer 4, work related contiguous coal seams 5, 6, 7 and 8 using known methods development, and methane gas is sucked off from the goaf 10 longwall mining of coal seams using traditional technologies degassing of coal seams underground way, because hasoutdata pre underworked layer 5 and narabotany 6, 7 and 8 of contiguous coal bed natural gas is significantly reduced, and the residual gas does not complicate the management of sewage treatment works on the gas factor.

Thus, the use of the proposed method due to the suction of methane from the zone of maximum outgassing undermined reservoir means degassing will reduce gazoobilnosti excavation sites and due to this increase the load on the cutter shaft and the security of doing cleaning work on the gas factor.

Sources of information

1. Miasnikov AA, Ryabchenko A.S., Sadchikov, VA Management gassing when the reservoir. - M.: Nedra, 1987, ñ.38.

2. Methodological recommendations on the procedure for the degasification of coal mines. Issue 14. RD - 15 - 09 - 2006. - M.: OONTZ "Industrial safety", 2007, p.3, 10, 11, 98-103, 2.

3. RF patent №2100611, CL 21F 1/18, 7/00, 1995 (prototype).

4. RF patent №228230, CL IS 41/18, 21F 7/00, 2005

5. The monitoring equipment efficiency ghatotkacha installations CIRCLE. The user guide. Re 4217 - 100 - 44645436 - 03. Ekaterinburg, 2004, p.3-19.

1. The method of controlling the emission from the goaf in the development of the Suite vysokogazonosnyh contiguous coal seams, providing for the development of one of the first and including intake conveyor and ventilation development workings, which contour extraction column, definition of structure, power, and strength of rocks in the immediate roof of coal seam, the length of the active zone of outgassing undermined and narabatyvaem coal seams, the length of the zone of discharge undermined and narabatyvaem coal beds and zones of maximum outgassing undermined reservoir, a supply of fresh air to Oistamo slaughter due to obesoty depression for two contour extraction column of air supply conveyor and ventilation workings in straight flow diagram of ventilation with the outgoing jet podviganiem and tap it supported for clearing face conveyor generation, which is isolated from the goaf with what omashu installation after podvigina stope organ number and construction of the insulating wall to form between them mine workings, however, as podvigina stope supported for clearing face development in the areas of active gas undermined and narabatyvaem layers construct breathable through jumper with formation of one pair of mine chamber, adjacent to which the part of the developed space is a zone of capture of methane, and the nearest of stope breathable pass jumper, which is the front bulkhead, erect from him at a distance equal to not more than the length of the section between clearing face and the beginning of the zone of active gassing narabatyvaem layers, and the other more remote from the stope jumper, which is the rear bulkhead, respectively at a distance equal to not more than the length of the section between clearing face and end of the zone of active gassing narabatyvaem layers, while the rear pass jumper periodically transferred after podvigina stope ahead of the front of the jumper after the departure of the stope from the front of the jumper to a distance not exceeding the length of the zone of active gassing undermined layer, simultaneously with the removal of the outgoing jet stope in a supported production through leakage of air when passing them is via goaf organ and a number of mine workings generate a flow of methane-air mixture, one of which is devoting on mine development in outbound excavation of the site, pre-diluted in it and mine the camera podviewer air, and another is an essential part created in the developed space flow methane-air mixture away from the space outside the excavation area, under construction breathable pass jumpers for education for mine clearing face the camera, in front of the front wall jumper between clearing face and the zone of maximum outgassing undermined reservoir impose additional checkpoint jumper, characterized in that the outflow of another part of the flow methane-air mixture from the goaf is carried out by forcing it into the area of influence of the walk-through jumper mine camera in the direction of arrangement of the discharge zone undermined layer, simultaneously with which due to backwater mine depression is a redistribution layer this part of the flow of a methane-air mixture by the power of the discharge zone, depending on their concentration of methane and accordingly the distribution in the direction of arrangement of the upper layers of this zone to the unloading zone of capture of methane, which produces kartirovanie pushed part of the flow IU novastoshnah mix well for degassing, which Buryats to the formation of the mine chamber supported for clearing face generation in the discharge zone undermined reservoir, estuary, each of whom come behind the design space construction breathable wall jumpers mine camera, and her face is in the zone of maximum outgassing undermined reservoir, and drilling of each well for degassing operate outside the influence of the secondary precipitation of the main roof, with additional checkpoint jumper originally installed in the supported for clearing face to develop the location in which its vertical plane coincides with a vertical plane drawn through the point which is the projection of the face from the nearest stope well for degassing soil goaf, and the line which is the perpendicular from a given point on the boundary between the supported development and goaf, and then as podvigina stope this jumper is transferred in the direction of longwall pillar to form in the discharge zone zone transfer to transfer additional tasneema part of the flow methane-air mixture between each new installation location of this jumper and the zone of methane released simultaneously with Chapter is of inferior part of the flow methane-air mixture as podvigina stope continuously record the values of its concentration and flow rate to control for the level of changes in these parameters, in the future, as soon as the level of concentration of methane-air mixture will be reduced to the minimum acceptable according to safety rules, values form the following mine the camera after drilling the next hole for degassing a repetition of the cycle of collecting methane from the zone of maximum outgassing undermined layer.

2. The method according to claim 1, characterized in that in the construction of permeable flow bridges for education mine cameras with simultaneous formation of a zone of capture of methane in pipeline development ahead of the stope additionally construct, at least two air-permeable bushing jumper with the formation of the ventilation gateway intended for redistribution of flow supplied to Oistamo the bottom of the air in such a way that a large part of which goes to Oistamo slaughter on vozduhopodajushchej ventilation generation.

3. The method according to claim 1, characterized in that the fixing of the values of the concentration and flow rate of methane-air mixture is carried out by means of equipment for remote control of methane placed in supported the development on the nearest exit from the stope well for degassing connecting it to the degassing network of the mine.

4. The method according to claim 3, characterized in that, as mentioned equipment used in trojstvo, based on the measurement of the concentration and flow rate of methane, for example, the control apparatus efficiency ghatotkacha installations "CIRCLE".



 

Same patents:

FIELD: mining.

SUBSTANCE: spatially oriented boreholes are drilled in degassed massif. Heads of boreholes are sealed and cased with a perforated pipe. Additional vacuum-pump aggregates are installed at each head of a borehole cluster. The aggregates perform forceful withdrawal of gas mixture to a central vacuum station. Additional facilities of gas mixture withdrawal, installed before each borehole cluster, function as a flushing aggregate during drilling. Simultaneously they loosen and dynamically affect a bottomhole zone of each borehole. By rotating the functions of line for pressurising suction the same pump aggregates operate for pumping out methane-air mixture from the cluster of boreholes.

EFFECT: increased efficiency of gas recovery of formation and of methane withdrawal, reduced gas contents in mine developments, increased safety of mining related to gas factor.

4 dwg

FIELD: power engineering.

SUBSTANCE: mine methane in form of conditioned air-methane mixture (AMM) is used in power installation as gas fuel. Not-conditioned AMM is retarded with combustion products with specified upper and lower limits of methane contents. Further the mixture is thinned with air and used as gas fuel. Not-conditioned AMM is thinned with air flow, if contents of methane in it is below the established lower concentration limit. Then it is used for blowing at combustion of hydrocarbon wastes of coal mining and for production of gas synthesis. Produced gas-synthesis is used at combustion of hydrocarbon wastes and/or is utilised as reserve gas fuel for power installation made in kind of a heat generating installation.

EFFECT: rational utilisation of source not-conditioned air-methane mixture (methane 2,5-25%) at its safe transporting via gas lines; also simultaneous-separate utilisation with exhaust air flow in power installations involving hydrocarbon wastes of coal mining both at combustion in power installations and in gasification producing and utilising gas synthesis and methane-air mixture together with air flow as blowing.

17 cl, 6 ex, 2 tbl, 7 dwg

FIELD: mining.

SUBSTANCE: invention involves determination, according to mining-and-geological and mining-and-technical conditions of the mine, of technogenic methane reservoirs formed with disintegration of rocks during extraction of coal beds. There chosen are location places of wells on the basis of extracting maximum amount of methane from one or several technogenic reservoirs through each well at its depth providing optimum unit costs for methane extraction from those reservoirs. Invention allows increasing methane content in the extracted gas mixture owing to limited air inflow to the well due to high aerodynamic resistance of the deformed massif in the section of unextinguished mine workings to well perforation channels. Invention allows extracting conditioned methane-air mixtures in conditions of occasional disturbance of tightness of mine workings with atmosphere or absence of tightness in widely used mine abandonment technologies.

EFFECT: increasing productivity of degassing wells owing to degassing of several technogenic reservoirs opened with one well.

1 dwg, 1 tbl, 1 ex

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular - to safety engineering during underground development of gas-bearing coal beds with stretching poles with complete roof collapse and may be used for reduction of the production face methane-bearing capacity. The invention effect consists in improved degasation efficiency due to maintenance of the degasation well cross section and throughput capacity as well as their sealing reliability increase. The proposed degasation method involves drilling wells across the roof rock parallel to the production face at a distance of 1-2 m from the coal bed, the spacing between them equal to 0.1-0.2 of the production face length. The degasation wells are sealed in rock and connected to the degasation pipeline. In case of insufficiency of the wells connection to the bed with the help of natural and technogenic cracks using, for example explosion, one additionally creates artificial fissuring. The proposed method is based on usage of the effect of periodical partial unloading of the bed and its immediate roof before the production face during its excavation with a long production face.

EFFECT: method ensures efficient degasation of the bed due to wells positioned in the roof rock and reduction of their sealing and maintenance costs.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: plant comprises jet pump 2 installed on pipe string 1 in well passing through coal beds 3. Pump 2 is installed in lower part of pipe string 1, length of which is more than depth of lower coal bed 3 occurrence. On lower part of pipe string 1, below lower bed 3 foot, there is lower support ring 4 installed, to lower part of which on adapter 5 there is a block-filter 6 fixed. Higher along pipe string 1, over roof of upper bed 3, there is an upper support ring 7 installed with relief windows 8. On outer surface of pipe string 1 under windows 8 over roof of upper bed 3 there is packer 9 installed. On ring 4 there is body 10 of pump 2 installed with a mount seat for detachable insert 11 with nozzle and mixing chamber with diffuser. Insert has channel 12 for discharge of working and pumped mediums mixture and channel 13 for supply of medium pumped from well with a check valve 14. In upper part body 10 is connected to lower part of pipe 15 of working medium supply equipped at upper end with sealing element 16 installed on ring 7 and inlet funnel 17 to collect detachable insert.

EFFECT: improved efficiency of pumping unit operation with availability of liquid and gas phases and solid mechanical admixtures in pumped medium.

1 dwg

FIELD: mining.

SUBSTANCE: bed is opened and prepared by long columns with contouring extraction pillar by wells. Water is degassed and injected in bed for its unloading and processing by mechanised complexes. Extraction pillar is contoured on both sides by two parallel wells. The latter are crossed between each other in plane of extraction pillar by directed drilling by changing trajectory. To unload coal bed in points of well crossing, they are connected to each other by means of channels, which are produced by means of hydraulic rupture. On one side of coal bed preparatory excavation is carried out in wells that serve for their ventilation due to general shaft depression. On other side of extraction pillar, bed is degassed with application of arranged wells.

EFFECT: reduced volumes of drilling works, lower expenses for mines excavation.

1 dwg

FIELD: mining.

SUBSTANCE: invention consists in drilling formation borehole, in its sealing, in pumping liquid (water) into formation in static mode, in hydraulic pulse effect on formation and in connecting borehole to degassing pipeline. The novelty of the invention consists in adding chemically active substance and substance, molecule of which has movable hydrogen into pumped liquid; also concentration of introduced additive is specified depending on contents of periphery hydroxyl and carboxyl groups in chemical structure of coal. Magnesium-iodine-methyl is added to water as a chemical substance. Magnesium-iodine-methyl is added with the organic compound containing hydroxyl or carboxyl group.

EFFECT: implementation of method facilitates increased contents of methane in mixture withdrawn from formation due to chemical reaction at reaction of magnesium-iodine-methyl with water and organic substances having chemical groups with movable hydrogen including these ones in chemical structure of coal.

3 cl

FIELD: mining.

SUBSTANCE: gas generator consists of restricted and non-restricted tubular charges from solid fuel, which are arranged on logging cable, charge ignition system located in central channel of restricted tubular charges and including ignition device of detonation action, which consists of blasting cartridge and detonating cord, and device of flame action in the form of an electrical igniter connected in-series with blasting cartridge and installed under ignition device of detonation action at the specified distance therefrom. At that, lower edge of generator is tightly closed with a plug, and cable has fireproof coating throughout the length providing its being protected against thermal action of combustion products of charges.

EFFECT: gas generator allows creating multiple and extended cracks in coal bed in conditions of low hydrostatic pressure in the well owing to increase of time of gas hydraulic pulse impact on coal bed, which increases its gas recovery.

3 dwg

FIELD: mining.

SUBSTANCE: invention is related to the field of mining, namely to method for degassing of coal beds. Cluster of vertical and slanted wells is drilled for coal bed. They are cased with casing pipes to roof of coal bed. Well shafts opened in interval of coal bed are filled with explosive. Blast impact at coal bed is carried out by means of explosive blasting. At the same time distance R between open shafts of neighbouring wells in interval of coal bed is determined from the following ratio: R=(0.8-1.2)(RT1+RT2) or R=(1.8 -2.1) RT. RT1, RT2 - radiuses of fissuring zone produced by blast, accordingly, in the first and in the second well. RT is radius of fissuring zone produced after blasting of single charge with equal capacities of charges in neighbouring wells.

EFFECT: improved efficiency of degassing due to development of vast fissuring zone in the whole volume of coal bed.

2 dwg, 1 ex

FIELD: mining.

SUBSTANCE: invention refers to mining, and namely to development systems of superimposed high gas-bearing coal beds. Method involves driving of drainage working along gas-bearing guiding bed at some distance from scraped bed prior to beginning of development workings on scraped bed. Drainage working is equipped with grid and automatic sealing connection strip and driven in the plane parallel to boundaries of extraction pillar in the area restricted with lines of actual breakage angles and displacement angles directed from bottom of workings of protected bed, and is used as degasation pipeline ventilated individually owing to common well depression. At that, maximum height h between guiding bed and scraped bed in vertical direction is accepted less than 40m, minimum thickness of guiding bed is accepted more than 0.2m, where m - thickness of scraped bed.

EFFECT: reducing duration of degasation, increasing degasation efficiency, reducing methane affluxes from worked out area, effective separation of air flows.

3 dwg

FIELD: mining.

SUBSTANCE: system includes pit shaft with air-sound channels, ventilation and noise silencer chambers and ventilation stall. Stall is attached to pit shaft by means of the pipeline piece built in the building located above the underground structure. Between ventilation and noise silencer chambers there installed is elastic diaphragm with an opening.

EFFECT: reducing noise level by means of multi-staged silencing.

1 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular - to a method for removal of dust and gas from the breakage heading in case of room-and-pillar development system. It involves supply of fresh air to the bottomhole zone with a draught source generating a vortical circulation circuit. On the one side of the circuit one performs supply of fresh air while on the other side one performs removal of contaminated air from the bottomhole zone. The draught source is placed in the bottomhole zone. It creates the first circuit of circulation vortical motion and generates a directed air flow, contaminated with dust and gas, along the wall of the excavation opposed to the miners' workplaces. At the spot of the first vortical circulation circuit connection to the following vortical circuit a linkage is driven that connects the excavation wherein cleaning works are performed to the exhausted chamber. An additional draught source installed in the exhausted chamber may be equipped with an air duct.

EFFECT: method enables intensification of ventilation in an excavation wherein cleaning works are performed and miners are present and at the place of connection of vortical circulation circuits where occurs accumulation of dust and gas clouds which improves sanitary and hygienic conditions of mining workers labour.

2 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention may be used in mining industry. Separator intended for separation of coal bed gases is placed in cavity of mine. Hydrocarbons separated in separator are exhausted via gas line, and volume of gases discharged from mine is substituted with atmospheric air. Separator comprises body with nozzle of gas inlet 14, nozzle of light gas discharge 12 and nozzle of heavy has discharge 1, engine 20. In toroidal cavity 5 of separator body there is radial-axial centrifugal compressor installed with hollow blades, in which frontal slots 1 and rear slots 2 are provided. Propeller 10 is fixed on tubular extension of shaft 11. To inner surface of propeller 10 there are blades of radial-axial centripetal compressor 9 fixed.

EFFECT: efficient separation of heavy and light gases, reduction of power inputs for air conditioning in mine.

3 cl, 6 dwg, 2 tbl

FIELD: mining.

SUBSTANCE: previously frame is prepared for heating with the help of flexible heating element, which is arranged along perimetre of outer or inner surface of frame with fixation on it. Afterwards heating element via terminal box arranged inside connecting box is connected to sensor for control of air temperature supplied to area of frame location. Sensor is connected to source of power supply. Area of sensor location together with connecting box is a section of frame, towards which largest part of cold atmospheric air flow is directed in process of reverse. Under conditions of negative temperatures, prior to reversing of ventilation jet at specified time by actuation of air temperature control sensor, heating element is connected to source of power supply, providing for preheating of supply channel folding door frame. As ventilation jet is reversed with supply of cold atmospheric air, channel folding door is transferred to position of reverse mode with the possibility of adjacency to heated frame. At the same time frame heating is continued, and heat is transferred from frame to folding door, preventing its icing. As time of ventilation jet reversing elapses, frame heating is stopped by de-energising of heating element. Then since channel folding door will not freeze to frame, it is freely changed into initial position. Prevents icing of folding door in supply channel during ventilation jet reversing under conditions of negative temperatures.

EFFECT: heating of supply channel folding door as it adjoins heated frame in reverse mode position.

6 cl, 4 dwg

FIELD: mining.

SUBSTANCE: invention refers to the sphere of mining industry and may be used in mines ventilation. Method for automatic regulation of temperature of air supplied in mine includes application of geothermal heat of mine pumping water, at the same time pipe of pumping with radiators for increase of heat exchange area between water and air is pulled through surface tunnel with length of 30-50 m, arranged in front of heater, moreover, pipe is arranged with at least two turns and is installed with a permanent inclination of at least 0.02 along with water flow.

EFFECT: method makes it possible to considerably save thermal energy in winter and to cool hot air down in summer.

2 dwg

FIELD: heating.

SUBSTANCE: method involves heating of ambient air with flue gases coming from fuel combustion chamber, its supply to the mine through ventilation system. Hot air addition is dosed to ventilated air flow directly to suction channel of the main mine ventilation fan. Secondary blasting is used in combustion chamber. Secondary air is heated in convection jacket of side walls of combustion chamber. In outlet gas duct there used is cold air blast which is directed upwards at an angle not less than 45°. Fuel combustion chamber is equipped with outside located secondary air fans and inclined slit atomisers provided in side walls. External surface of side walls of fuel combustion chamber is equipped with convection jacket. Gas burners are located in ceiling part of fuel combustion chamber. Mine air heating is improved by preventing flue gas penetration into ventilation flow supplied to the mine.

EFFECT: increasing air-heating plant efficiency owing to complete fuel combustion, decreasing metal consumption of air pipeline.

4 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention is related to mining, namely to method for purification of outgoing air jet from methane and its utilisation. Method includes formation of layer accumulation of methane. Prior to exhaust of mine air into atmosphere, it is sent to inclined mine tunnel, at the same time its speed is reduced 2-4 times, by means of closure of upper part in inclined mine tunnel by one third of its height. Methane-air mixture is extracted with the help of pump from layer accumulation and sent for combustion. Lower layers of mine air, which are free from methane, are sent to atmosphere from inclined mine tunnel. Incline of mine tunnel is selected within the limits of 8-12°, and outlet to atmosphere is done through rotary nozzle, which is turned by flank in wind direction. Length of mine tunnel is calculated in compliance with mathematical dependence with account of horizontal speed of air motion, speed of methane floating, height and inclination of mine tunnel.

EFFECT: provision of possibility to improve and simplify process of mine gas removal from mine.

3 cl, 1 dwg

FIELD: mining.

SUBSTANCE: invention is related to mining industry, namely to mine ventilation of transport tunnels. Installation comprises working and reserve fans, every of which has an electric motor, collector and diffuser, doubled inlet box in the form of joined individual boxes of working and reserve fans, on common rib of which there is a folding door that alternately covers fan inlets, and flag door that covers fan outlets, moreover, doubled inlet box is connected to fan bodies by means of collectors. Moreover, doubled inlet box of fans comprises detachable elements. Collectors are arranged as detachable and have stationary sectors connected to stationary part of inlet box, and detachable sectors connected to detachable sectors of inlet box.

EFFECT: invention provides for higher reliability and repairability of fan installations for main ventilation of mines.

3 dwg

FIELD: ventilation.

SUBSTANCE: box is designed for ventilation shaft of the subway. The box includes a headgear construction with air-conducting windows and external barrier in the form of ring-shaped shield. The shield is made in the form of cone widening upward and of amorphous material, and the inner surface of which is coated with a protective coating with sound reflecting inner surface. There is a through clearance between the shield and headgear construction.

EFFECT: sound reduction.

3 cl, 1 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for airing of mine and grooves and other objects of national economy, located under ground. Ventilatory installation includes operating and standby axial fans, located in ventilatory chamber. Ventilatory chamber is divided by means of partition cross inclined to side walls of chamber for two parts, used in the capacity of air-feed and offtake channels. Momtors of fans are located in part of ventilatory chamber, separated from the rest part of chamber by cross inclined - longitudinal partition. Transporting erection connection is connected to butt of ventilatory chamber.

EFFECT: decreasing of capital and operating costs, losses of mineral at development of stratified deposits and providing of safety of miner works.

3 dwg

FIELD: mining industry.

SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.

EFFECT: higher efficiency, higher safety, lesser costs.

2 dwg

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