Double-ended method of deposit opening during underground operations

FIELD: oil and gas industry.

SUBSTANCE: double-ended method of the deposit opening during underground operations includes shaft sinking of at least two holes, each hole having its own job site. Opening of the deposit is made by underground horizontal and/or inclined workings from each hole. As the shaft sinking progresses the underground horizontal workings are made from the hole at a distance of at least 5 diameters of the hole. Vertical wells are drilled from the surface and horizontal cuts and when the lower horizontal working is reached the well is drilled up to the project diameter of the air raise. Horizontal workings are placed vertically, one by one, at a distance to be determined by technical capabilities of the drilling rig. The upper part of the air raise is made from the surface through quaternary deposits by a usual method. At the first stage each end of the deposit is ventilated separately, at the second stage fresh air is supplied through a pair of combined developments - a borehole and the air riser at one end while outgoing jet is outputted through the combined developments of the other end.

EFFECT: method allows reducing scope of works during shaft sinking, increasing the sinking rate, reducing the period of construction and commissioning of a mine or minery, increasing reliability of ventilation due to ventilation risers.

3 dwg

 

Known "Method of mining of bedded deposits" (application RU # 2006141618 from 24.11.2006), including the opening of a mine field to the lower horizon of the main and auxiliary sloping trunks in the center and ventilation trunks on the flanks, training by conducting storey drifts to the borders of the mine field, and practicing floors in ascending order, characterized in that the preparation process of the lower floor of the breed from working driving place in podstrekava rubble bands, and when developing the overlying floors breed from working driving place in redeemable roadway spent the underlying floor and revealing inclined workings - main, auxiliary and ventilation shafts.

The disadvantages of this method are:

- large material costs;

- high mine depression due to the long path of the air jet;

- the need for ventilation of the horizon along the entire length of a mine field.

Known "Method of development of steep deposits" (application RU # 94026577/33 from 01.08.1994), including the development system of underground workings and wells, passed with the surface, the formation of the wells excavation cameras, leaving mezhdurebernyh pillars and release destroyed excavation of minerals from the cameras on podzemeliye workings with the subsequent issuance him on the day surface. The development of the field lead from lying to the hanging side. Direct extraction of minerals produced from the mining of the chambers formed by the through hole, the angles of which correspond to the angle of incidence of the field, in two stages. In the first stage are sinking excavation chambers of circular cross section in mezhdurebernyh the star-shaped pillars, the contours of which along their length to create the excavation excavation chambers of circular cross section in the second stage. The lateral surface of the excavation cameras, passable on the first and second stages are related among themselves forming. Artificial pillars in the form of a cylinder, formed after the laying-out space extraction chambers completed in mezhdurebernyh the pillars, used as a guide rock cutting tool, through which pass the excavation chamber in the second stage. Fortress backfill material artificial pillars exceeds the fortress fossil.

The disadvantages of this method are:

- high mine depression due to the long path of the air jet;

- the need for ventilation of the horizon along the entire length of a mine field.

Known "Method of opening deposits in underground development" (the invention of EN No. 2168626 from 22.02.2000), including Vert is unique main hoisting shaft from the surface zone of the displacement of the host rocks and blind shafts for dissection of the deep horizons, located within the mine yard overlying winding shafts with overload ore raised in the underlying blind trunks directly into the storage hopper and skips upstream of the winding stem. Thanks to this solution there is no need to load ore raised by a blind bore in the shaft of the trolley, its transportation to the mine yard and unloading it in the bin next lifting of the trunk.

The disadvantages of this method are:

- complexity and a great time sinking blind shafts;

- large material costs;

- high mine depression due to the long path of the air jet;

- the need for ventilation of the horizon along the entire length of a mine field.

Known "Method of opening and ventilation field Central double stems Mining. Terminological dictionary. - M.: Nedra, 1981), including sinking in the middle of a mine field two shafts having a common site, the development of horizontal and (or) inclined workings. With this method of opening fresh air is supplied by a single barrel cleaning and preparatory faces, and then moves on ventilation workings to the second barrel and thrown to the surface.

The disadvantages of this method are:

high on desota depression due to the long path of the air jet;

- the need for ventilation of the horizon along the entire length of a mine field.

Known "Method of opening and airing deposits flank the stems Mining. Terminological dictionary. - M.: Nedra, 1981)selected for the prototype, including the sinking of the edges of the two shafts of a mine field with two (separate) the site, the development of horizontal and (or) inclined workings. With this method of opening fresh air is supplied by a single barrel cleaning and preparatory faces and passing through the mine field, to the second barrel.

The disadvantages of this method are:

- decentralization, ventilating equipment;

- increase in capital cost due to the fact that before joining the flanks ventilation is carried out on a temporary basis;

- the supply of fresh air through the system piping, which leads to insufficient amount of air and a low rate of penetration openings.

The technical result is to reduce the cost of drilling and fastening vertical shafts, reducing construction time of the mine or the mine, increasing the reliability of the ventilation, the reduction of energy consumption for ventilation due to the reduced path of the air stream and reduce mine depression.

The technical result of the temperature is raised to those what a flank-dual way of opening deposits in underground development, including the sinking of the edges of the two shafts of a mine field with two (separate) the site, the development of horizontal and (or) inclined workings, according to the invention simultaneously with the trunks of horizontal benches drilling method are passed vent itself at a distance of not less than 5D from the trunk (where D is the diameter of the trunk), while the horizontal Zachodni are located at a distance H vertically from one another (where N is the distance determined by the technical capabilities of the rig), also the upper part of the vent itself through Quaternary sediments pass from the surface in a standard way.

The method is illustrated in 3 drawings: figure 1 is a shaft sinking with simultaneous drilling itself; figure 2 - opening the field at the first stage; figure 3 - opening the field at the second stage; showing: 1 - engine, 2 - Quaternary deposits; 3 - indigenous rocks; 4 - vertical shaft; 5 - horizontal Zachodni; 6 - ventilation raise boring; 7 - razboiul; 8 - drilling rig; 9 - guide bore; 10 - ore horizon; 11 - ventilation horizon.

The method consists in the fact that on the opposite flanks of the field with mine copra 1 traversed the barrel 4, the diameter is m D, from which to vent itself 6 depart horizontal Zachodni 5 at a distance of not less than 5D, where D is the diameter of the trunk (this distance is determined by geomechanics factor of stability conditions vertical mine workings). The distance H between the horizontal benches 5, vertically, is determined by the technical capabilities of the rig 8 and sustainability of indigenous rocks 3. In horizontal benches 5 are mounted drilling rigs 8 (for example, type Robbins), who are drilling ventilation raise boring 6. The diameter ventilation raise boring 6 is determined by the technical capabilities of the rig 8. Drilling rock is only possible on indigenous breeds 3, so the upper horizontal section 5 are in the bedrock in the immediate vicinity of Quaternary deposits 2 at a distance determined by the stability of PetroChina. The upper part of the ventilation raise boring 6 from the surface through the Quaternary deposits 2 are the standard way (e.g., blasting).

In the first construction phase of the mine (see figure 2), when the flanks of the Deposit are not interconnected horizontal workings and work independently of each other, on opposite sides of the field to implement a dual scheme of ventilation, in which fresh without the x is served by the ventilation raise boring 6, next on the horizontal workings 10 forks on the wings of a mine field, washes preparatory and cleaning the hole, and then the barrel 4 is given to the surface. The order of air flow may be reversed, fresh air in the barrel 4, and to give vent rising 6. The speed of the air in the barrel 4 is limited by the EPO and its purpose, and the ventilation raise boring 6 limited technological possibilities of the equipment.

In the second operational phase of the mine (see figure 3), when the flanks of the mine field are connected to each other horizontal mine workings, provide flanking the scheme of ventilation, in which fresh air is supplied by the main stream and the vent itself (Fig. right flank) with one flank and moves along the horizontal workings, washes preparatory and cleaning the face, and then moves to another flank of a mine field and another barrel and another vent itself (Fig. left flank) is given to the surface.

The proposed method of opening allows you to:

- reduce the amount of the sinking of the mine workings due to the presence of the rebels;

- significantly increase the rate of penetration due to the use of drilling equipment;

to shorten the construction and commissioning of the mine or is Unica;

- increase security by having two additional outputs to the surface;

- during the operational phase of the mine or mine to increase the reliability of the ventilation through the vent itself.

Flanking the double way of opening deposits in underground development, including on opposite flanks of a mine field, the driving of the vertical shaft, at least one from each wing, which has its site, and each barrel is opening Deposit of underground horizontal and/or inclined workings, characterized in,as shaft sinking from it are passed underground horizontal excavations and at a distance of not less than 5D from the trunk, where D is the diameter of the barrel, from the surface and from these workings drilled one vertical well, and when reaching the underlying horizontal production well return stroke using the expander drilled to the design diameter ventilation raise boring; horizontal excavations are located at a distance H vertically from one another, where N is the distance determined by the technical capabilities of the rig, and the upper part of the vent itself through the Quaternary deposits are held with the surface in the usual way, at the first stage strategery flank deposits ventilated separately: the trunk is served fresh air, and by dual with him vent itself is issued outbound stream, at the second stage clean air on one side is fed by a pair of dual vertical openings, the shaft and the ventilation raise boring and outgoing jet is issued from the other flank by dual vertical workings.



 

Same patents:

FIELD: mining.

SUBSTANCE: method involves formation of lower slashing of formation by means of a plough unit with movement into it of a hauling conveyor, cutting in bottom-hole massif of a rear vertical slot and a slot that is upper along the boundary with the roof, which are longitudinal throughout the face length, lowering of the massif onto the conveyor, splitting of a mineral into slabs, output of the mineral from the face in slabs, their lowing into trolleys and locomotive haulage to a bulk material crushing chamber. In the massif settled down on the conveyor there cutout are inclined transverse slots splitting the massif into inclined layers that are then transferred to horizontal position for splitting of the mineral into slabs. Cutout of vertical transverse slots is performed using a motor-driven multi-jib machine.

EFFECT: high efficiency of a mining face, maximum extraction of mineral deposits from the formation being developed, extraction of methane from the produced mineral, safety of second working as per gas factor and sanitary-hygienic conditions of underground production as to dust.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and may be used in development of thick edge ore bodies with unstable and precious ores, for instance, kimberlite pipes, by the underground method. The method includes formation of man-made massif with tunnelling and filling of stopes at the cut and undercut layer, descending extraction of reserves under the man-made massif and filling of the mined space. Under the man-made massif they form a transition layer-sublevel by alternate tunnelling of the stopes of the first phase, with height equal to the height of the layer, and stopes of the second phase, the height of which is equal to the height of the layer-sublevel, at the same time the stopes of the first phase is given the shape of the tilted trapezoid in the vertical cross section, and stopes of the second phase - the irregular hexagon, besides, the width of the upper bases of figures of these stopes and width of stopes of the above (undercut) layer are accepted with equal value. Reserves of the deposit below the transition layer-sublevel are mined by chambers in staggered order with a shift to a sublevel. Chambers in the cross section are given the shape of the hexahedron extended along the vertical line. The upper part of the chambers is formed in the form of a trapezoid with size of half of chamber height, the contours of the upper base of which match the contours of the base of the filled stopes of the first phase in the transition layer - sublevel, and contours of the lateral upper sides - with contours of the lower sides of the filled adjacent stopes of the second phase. The lower part of the chamber with the size of half of its height is given the shape of the tilted trapezoid in the vertical cross section.

EFFECT: invention makes it possible to increase intensity of mining of ore deposits, to increase size of an extraction unit and to reduce costs for filling works.

5 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining, and namely to production of useful minerals by an underground block leaching method. The underground block leaching method of useful minerals involves driving at the block bottom of openings of drain horizon for collection of productive solutions, crushing and shrinkage of ore so that a drain horizon of a safety pillar is left above openings, drilling of upward pumping wells from openings of drain horizon through the safety pillar, supply through them of a leaching solution to shrunken ore, collection of productive solutions in openings of drain horizon. Upward pumping wells from openings of drain horizon through the safety pillar are drilled to lower boundary of shrunken ore, and the leaching solution mixed with air is supplied to shrunken ore via upward pumping wells in a hydrodynamic cavitation mode.

EFFECT: invention allows increasing extraction degree of useful minerals from ores, shortening leaching duration and reducing flow of leaching reagents.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: transportation of mineral deposit crushed with a combine is performed by means of a self-propelled wagon to a self-moving snaking conveyer, the loading part of which is located in a chamber, and the unloading part is located above an ore-passing well, via which the mineral deposit is transported and unloaded to the ore-passing well; with that, movement of the conveyor to the next well is performed when transportation length of mineral deposit with the self-propelled wagon in the chamber achieves maximum length determined as per mathematical expression. Limit length of the chamber, at which continuous operation of the combine is provided by means of a hopper-loading elevator, the self-propelled wagon and the self-moving snaking conveyor, is calculated as per the mathematical expression.

EFFECT: improving working capacity of a combine complex.

2 cl, 4 dwg

FIELD: mining.

SUBSTANCE: method to prepare ore bodies to leaching of useful components in place of bedding includes installation of charges into well rings (11) in the central part of the ore body, explosion of the specified well rings and subsequent injection of a process solution into the central part of the ore body via perforation channels with the branching cracks along periphery of channels, formed by the upper part of the ore body with directed blasting Charges are installed with formation of a water circular gap between an explosive charge, bottom and walls of the well, after formation of a circular gap the well is filled with water or plugged.

EFFECT: invention makes it possible to increase opening of wells and evenness of distribution of a leaching solution in the ore body volume.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: for realisation of the method, drainage-degassing wells are drilled in zones of higher cracking outside the limits of the prepared mine. Wells are drilled in the bottom-up direction in the close proximity to the profile of the prepared mine. Pumping of gas saturated drainage brines is carried out until the level of the depression curve is set below the horizon of breaking works, and it is maintained at this level for the entire period of mining. Besides, in process of wells drilling the minimum permissible distance to the profile of the prepared mine is accepted as 0.035 m per each running metre of the well.

EFFECT: method makes it possible to increase safety of underground mining works due to reduce amount of arriving fuel gas and natural waters to mines from deep and deposit-adjacent horizons of earth interior.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method includes the following stages. Installation of a structure inside or tightly with an underground mine, so that the structure provides for reactive forces when pushing a cutting head in direction of the material by means of a series of rigid materials fixed on the structure, which i arranged so that series of rigid elements may be fixed to it simultaneously at least in two directions, so that parts of tunnel branches could be formed in at least two appropriate directions, of the underground mine designed for transportation of people, mechanisms and extracted material. Formation of multiple parts of tunnel branches entering the material. Formation of the first part of the tunnel branch with the help of a cutting head and a series of rigid elements in the first direction, and afterwards formation of the second part of the tunnel branch in the second direction. During formation of the second part of the tunnel branch, movement of rigid elements from the part of the first tunnel into the part of the second tunnel branch for extension of the series of rigid elements in the part of the second tunnel branch.

EFFECT: application of the method considerably reduces costs, makes it possible to considerably increase speed of tunnelling and increases efficiency of production.

21 cl, 10 dwg

FIELD: mining.

SUBSTANCE: method involves separation of panels into individually ventilated blocks, in which second working and first working is performed. First working is ahead of second working at least by one block; at that, second working in adjacent blocks is performed simultaneously. Air supply and ventilation mine workings are routed along the panel boundaries. Each block of the panel is outlined on three sides with first block working. Panel and block mine workings are located symmetrically relative to the panel axis and connected to each other by means of cross passages made at the beginning of each of the blocks. Local ventilation plants are located in T-pieces arranged on the panel axis and on its boundaries at connections to main entries. Return ventilation air jet is removed from the T-piece to main entries through a crossing. The panel is developed in the direct order by means of subsequent development of blocks, and reserves of each of the blocks are developed in reverse order. Delivery of mined rock from the blocks is performed to two unloading points located at the connections to main entries.

EFFECT: increasing the panel productivity and reducing the time of its preparation and commissioning.

12 cl, 1 dwg

FIELD: mining.

SUBSTANCE: method includes development of reserves from a border of an extraction column, drilling from surface of wells into the extraction column and primary setting of the roof. Wells are drilled to the rated line of the roof arch in one row in parallel to a stoping face in the middle part of the limit span of the main roof slab. Eutectic-hard-freezing solutions are filled into wells for the height of 1.5-2 m, rated time is maintained, which is required for melting of ice in cracks of roof rocks and formation of germinal slots, afterwards the wells are filled to the surface with the same solutions, and a hydraulic rupture is carried out in a rock massif.

EFFECT: invention makes it possible to ensure controlled primary setting of strong cracked rocks.

2 dwg

FIELD: mining.

SUBSTANCE: method for shooting of ores and rocks on underground mining works includes drilling-off of a broken volume by opposite wells or blast holes, drilled from upper and lower drilling mines, their charging and exploding. An initiating charge in each well or blast hole is arranged at the distance La=2.25•dw, m from the bottom of the well or the blast hole, where: dw - diameter of a well or a blast hole, m, and distance between ends of opposite wells or blast holes determining thickness of a broken layer, is accepted as equal to L=2•Rr.e.+0.9•Do, m, where L - distance between ends of opposite wells or blast holes, drilled from upper and lower drilling mines, m; Rr.e. - radius of a damage zone from end action of a charge, m; Do - diameter of a bulk piece, accepted for the applied technology, m.

EFFECT: reduced specific and total flow rate of drilling, due to increased efficiency of using explosion energy.

3 dwg

FIELD: mining industry.

SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.

EFFECT: higher efficiency.

7 cl, 11 dwg

FIELD: mining industry.

SUBSTANCE: method includes partial filling of extracted space of side and central mains by filling stripes from lava extracting shafts. At center of semi-lava on the side of massive, wherein next extractive column will be cut, filling shaft is additionally driven, wherefrom full filling of space between central fill stripe and fill stripe on the side of massive is performed. Preparation of next extraction column is performed under protection of erected fill stripes.

EFFECT: higher safety, higher efficiency.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes cutting well field portions by driving bed and field mines. At mine fields to be prepared with weak rock stability driving of several field preparatory mines is performed at portion of field with width determined from formula. Bed preparation mines on same portion are driven alter, with displacement of cleaning operations from these may be driven in portions, at which their stability is provided for technological time period with inter-drift blocks of given rigidity.

EFFECT: higher safety.

2 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method includes extraction of mineral resource by underground mine method in liquid environment, under protection of water-resistant rock massif. Full flooding of auxiliary extracting and preparatory mines is performed, which provide for start of wiping operations, with working liquid, neutral relatively to mineral resource and enveloping rocks and being under pressure, matching value of pressure at depth of mine. Process of removal of separated rock beyond underground flooded space is synchronized with replenishment of working liquid volume in this space. Working liquid pressure can be formed by effecting it with force liquid, which is placed either in mine shaft, hydraulically connected to lower flooded auxiliary extracting mine, or in mine shaft and force column, placed on earth surface, above mine shaft, and hydraulically connected thereto. Required height of force liquid column is determined from mathematical expressions. After mineral resource extraction is finished within mine field, flooded extracted space is used for placement of toxic and non-toxic wastes of industries or strategic objects, while process of transfer of wastes or strategic objects into liquid environment is performed synchronously with removal of working liquid beyond flooded space in volume, equal to volume of transferred wastes or strategic objects.

EFFECT: higher safety.

3 cl, 1 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method includes separating resources of all levels on blocks, in form of upwardly elongated hexahedrons. Blocks on adjacent levels are positioned in staggered order with displacement of some of them relatively to others for half of blocks width. Resources of each block within limits of hexahedron are divided on two portions: hexagonal chamber inside the block and block itself of same hexagonal shape on all six sides of chamber. Preparation and cutting of chamber resources is realized by driving field level drifts and mines, intermediate sub-level drifts and mines, and also level and sub-level orts and drifts, driven through mineral resource, from which resources of chambers and blocks are drilled and exploded. Extraction and outlet of mineral resource is performed in three rows - first chamber resources, than inter-chamber blocks under protection of ceiling blocks, after that ceiling blocks deposits. Outlet of resources from chambers and blocks is performed trough ends of level orts and mines, an also through ends of intermediate sub-level mines.

EFFECT: better use of mineral resources, lower laboriousness, lower costs, decreased block preparation time.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes determining width of edge zones of block, subjected to influence from support pressure, then preparatory mines are driven along block at limits of these zones and permanent rigid supports are erected therein. After that portion of block from preparatory mines to block center is extracted.

EFFECT: increased mineral resource yield coefficient, safer extraction of inter-panel support blocks, without breaking their carrying ability and without using backfill materials.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes dividing a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From drift below each section shafts are driven, from which along mineral resource ascending shafts are drilled. For drilling chambers deposits by wells, sub-level drift is driven along mineral resource, access to which is provided by driving field sub-level drift and shafts. Outlet of extracted rock is performed through ends of shafts. After letting out rock from all sections ceiling beam is brought down and also let out through ends of shafts.

EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes separation of a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From the drift shafts are driven below each section, from which along mineral resource ascending shafts are drilled, meant for drilling from them by horizontal or slanting wells and extracting sections resources. Outlet of extracted rock mass is performed through ends of shafts. After outlet of rock mass from all sections ceiling beam is brought down and let out also through ends of shafts.

EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.

2 dwg

FIELD: mining industry, particularly methods of underground mining.

SUBSTANCE: method involves advancing breakage face in under-roof layer; drilling bores in the under-roof layer and injecting weakening reagent to separate zones through the bores; drilling blind drift in front of the breakage face, wherein the blind drift has length of not less than breakage face length; drilling bores for following weakening reagent injection from the blind bore; additionally boring intermediate bores between above bores for following gas exhausting; performing under-roof layer development so that non-developed bank is left directly above breakage face support; performing stepwise weakening reagent injection into corresponding bores and evacuating gas from intermediate bores; leaving bores filled with weakening reagent for 1-2 days and supplying the weakening reagent into intermediate bores.

EFFECT: increased efficiency of mineral preparation.

3 cl, 3 dwg

FIELD: mining, particularly methods of underground mining.

SUBSTANCE: method involves cutting mineral by hydrocutting machines and headers from face massif in rectangular blocks; putting on metal cases on the blocks to facilitate loading-and-unloading operations and transportation; loading the cut blocks on hauling truck along side previously opened from breakage face side, wherein the truck position is fixed by spacing apart hydraulic post permanently connected to the hauling truck; moving loaded hauling trucks inside breakage face by hauling tracks along channel, V-shaped guiders or guiding rails with the use of haulage cargo winches arranged in berms near conveying tunnels or with the use of independent drives, wherein the conveyance is carried out to conveying and venting tunnels abutting the breakage face; loading mineral blocks from hauling trucks onto wheeled transport platforms without block turning for following transportation. Distance between rail tracks is equal to rail track width to transport blocks on paired wheeled platforms in which locomotive moves along medium track. Working area face is strengthened by individual hydraulic posts and metal hydraulic jacks and metal roof bars or by mechanized face support. The face support has fastening sections including above hydraulic jacks and roof bars, as well as wheel guiding means sections and hydraulic movers with control panel arranged on each fastening section pair. The roof is controlled by partial filling the excavated space with mineral blocks. Distance between neighboring mineral units arranged on one paired wheeled platform and on adjacent platforms may be identical and equal to distance between guiders in breakage heading. Mineral blocks are cut in several rows, wherein depth of slot at seam ground and roof is two times as thickness of mineral blocks to be cut.

EFFECT: increased output, improved safety and ecology.

3 cl, 14 dwg

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