Complex method of hydro excavation of minerals

FIELD: mining.

SUBSTANCE: complex method of hydro excavation of minerals consists of development mining, of equipping with ventilation system and system of heating of mine working, of hydraulic breaking up of bed with an automated mining combine in a continuous mode of operation with installation of face supports, of hydraulic transporting of broken rock, of concentration of obtained mass and its further dehydration, of drying of water encroached beds, and of purifying of process liquid with its recirculation. Hydraulic breaking up of a bed is carried out simultaneously with its impulse mechanical destruction by means of introducing an abrasive material of upgraded hardness into a liquid jet; further abrasive material is separated from broken rock at the time of its hydraulic transporting and concentrating; concentration of broken rock and partial separation of liquid pulp with abrasive material from broken rock are performed by means of transporting and mixing them at the roller type facility; flowing down pulp with abrasive material is driven to purification by means of a pumping system wherein solid particles of abrasive material are separated from the rest of the pulp and where abrasive material is saturated with solid particles of broken rock of specified dimension. Saturated abrasive material is directed to recirculation, while partially purified process liquid is mixed with the liquid obtained at drying of water saturated beds; then process liquid is finally purified by cold evaporation and is brought to recirculation. A portion of purified process liquid is supplied to the ventilation system of mine working and is dispersed in air in form of fine dispersed particles; continuous control measurements of air temperature, of explosion hazardous particles and coal dust contents in air are carried out during mine working operations.

EFFECT: upgraded versatility, efficiency, automaton, quality and reliability of process behavior in constraint conditions of mine working, improvement of ecological situation at mine.

4 dwg

 

The invention relates to mining and is intended to increase the level of mechanization and automation of work in the underground workings, can be used in the development of solid minerals by way of hydropobic.

The known method development and underground coal system Dolinsky in automatic mode, including blasting and transportation of coal to the crusher with the subsequent combustion in the steam boiler, where water is split into oxygen and hydrogen, after which the oxygen is used in the furnace, and the hydrogen is supplied to the surface (see patent RU No. 2244829, CL. AS 41/18, 2002). This method aims at improving the profitability of coal mines by their conversion to the production of hydrogen. This method can be applied only to coal mines and other mining industries, he is not fit. In addition, the industry still needs coal, and this method is aimed at its complete burning in the pit.

There is a method of hydraulic borehole mining of minerals, including the preparation of wells for the installation in it of the downhole projectile, erosion of the reservoir and the suction of the formed pulp by hydraulic ejector (see patent RU No. 2256796, CL. AS 45/00, 2003). This method is only for the extraction of minerals from legkorazmyvaemykh a small liquid reservoir with unstable the mi sedimentary rocks. For the extraction of other minerals it is almost impossible to apply, especially in those mines where it is necessary for the surface to make a large number of chipped rock.

The closest technical solution to the claimed invention is an integrated method of hydropobic minerals, including the preparation of the Deposit for mineral extraction and ventilation systems and heating mining, hydraulic crushing reservoir automated mining machine in a continuous mode with installation of the lining, hydrotestosterone smitten rock, the enrichment of the mass and its further dewatering, dewatering flooded reservoirs, cleaning fluids and recycling (see the patent for useful model RU # 2001113332, AS 41/18, 2001). This method has advantages in comparison with the previous, however, not without some drawbacks. The splitting of the layers is not always equally effective as this process largely depends on the density and strength of the layer, the hardness of inclusions that fall under the hammer. It is not always possible to achieve improvement of ecological conditions in and around mines, especially liquid and the air.

The present invention is directed to solving the technical problem of increasing the versatility that makes the lesti, automation, quality and reliability of the technological process in the limited conditions of excavation, improve environmental conditions at the mine and its surroundings due to the recirculation of the liquid in the process, improve the air environment in mines and reduce the explosion of the mines.

The solution of a technical problem is achieved by the fact that in a complex way hydropobic minerals, including the preparation of the Deposit for mineral extraction and ventilation systems and heating mining, hydraulic crushing reservoir automated mining machine in a continuous mode with installation of the lining, hydrotestosterone smitten rock, the enrichment of the mass and its further dewatering, dewatering flooded reservoirs, cleaning fluids and recycling, hydraulic crushing layer are performed simultaneously with its impulse mechanical destruction by adding the stream of liquid abrasive material of high strength with higher weight characteristics than the rock, and then produce a separation of the abrasive material from the smitten rock at the same time hydrotestosterone and enrichment, the enrichment of the smitten rock, and partial separation from her is ecostay slurry with abrasive material produced by transport and mixing on the installation of the roller type, and flowing down the slurry with abrasive material through the pump system serves for cleaning, which produces the separation of heavy particles of abrasive material from the rest of the pulp and the feeding of the abrasive solid particles smitten rock of a certain size, and then send saturated abrasive material for recycling, thus partially purified process fluid is mixed with the liquid obtained after drainage of flooded reservoirs, finally cleaned by cold evaporation and sent for recycling, while the portion of the purified process fluid is directed into the ventilation system of the mine workings and is sprayed into the air in the form of fine particles, and when working in mines continuously make control measurements of air temperature, content of explosive particles and coal dust.

The invention is illustrated by drawings.

1 shows a mining machine in the working position, side view. Figure 2 - getoriginal. Figure 3 - system recirculation of the abrasive. Figure 4 - system of recirculation of the liquid.

A comprehensive way of hydropobic minerals includes preparation of deposits for mining and analyzing the layers 1, preparation of base sites, and system 2 ventilation and air heating hornyguycock, installation of equipment, system 3 control and video surveillance system 4, preparation of mine harvester 5 to work. Crushing layer is performed in a continuous mode hydraulic method using Gidrodinamika 6 installed on the working arm 7 automated mine harvester 5. The working boom 7 consists of two levers 8, connected by a hinge 9, installed on the processor 5 via a hinge 10 and provided with a hydraulic cylinder 11 management. Simultaneously with the crushing of the reservoir 1 are installing roof supports (not shown). Gidrodinamika 6 is connected by a hose 12 system 13 recirculation of process fluid. Hydraulic crushing layer 1 is produced at the same time with his pulse mechanical destruction by adding the stream of liquid abrasive material 14 enhanced durability with a higher weight characteristics than the breed of the reservoir 1. To perform this process to hydromobile 6 summarized the pipeline 15 is associated with system 16 recirculation of the abrasive material 14.

Transportation repulsed breed 17, enrichment and dehydration produced by the partial separation from her liquid slurry 18 with abrasive material 14 by transportation and active mixing on the shafts 16 of the conveyor roller type. When this occurs, the Department abrasive the material 14 from the smitten rock 17, because the particles of abrasive material 14 poured down into the gaps between the shafts 16 of the conveyor roller type, there also flows pulp 18, which is a mixture of process fluid with finely ground breaking layer 1 dust 19 rock 17. Flowing down into the gaps between the shafts 16 pulp 18 with abrasive material 14 on the inclined chute 20 is supplied to the pumping system 21, which pumps the slurry 18 with abrasive material 14 for cleaning. On treatment with the help of a centrifuge 22 produce the separation of heavy particles of abrasive material 14 from the rest of the pulp 18 and the feeding of the abrasive material 14 similar solids repulsed breed 17 of a certain size. These particles are contained in the rock 17 in the form of inclusions of small size and usually go to the dump. Rich abrasive material 14 is directed to a system 16 for recirculation. The method of saturation of the abrasive material 14 solid particles of breed 17 in the recirculation system 16 provides significant savings abrasive material 14 and allows it to be used without adding naturally spent abrasive material 14 during the whole technological cycle. The abrasive material 14 from the tank 23 is an extremely rare, only in exceptional cases. It is particularly important to use this method for the automatic system for the extraction of minerals and automatically controlled mine harvester 5. Any extension of the term of operation of the equipment in terms of automatic control significantly improves the performance of the mining and process reliability.

Partially purified using a centrifuge 22 the process liquid is mixed with the liquid obtained after drainage of flooded reservoir by the pump 24, the system 25 and finally purified by cold evaporation in the evaporators 26 and is directed to a system 13 for recirculation for submission to hydromobile 6. Part of the purified process fluid is directed into the system 2 ventilation and heating workings for spraying in the air in the form of fine particles. This reduces the risk of mines, promotes the deposition of coal dust, improves the air, helps to reduce leaching into the environment of coal dust together with air coming from the ventilation shafts. When working in mines continuously make measurements of air temperature, content of explosive particles and coal dust.

Thus, the claimed invention solves the technical problem of increasing the versatility, performance, automation, quality and reliability of the technological process in the limited conditions of excavation, improve the ecologist is the political situation at the mine and its surroundings due to the recirculation of the liquid in the process, improving the air environment in mines and reduce the explosion of the mines.

A comprehensive way of hydropobic minerals, including the preparation of the Deposit for mineral extraction and ventilation systems and heating mining, hydraulic crushing reservoir automated mining machine in a continuous mode with installation of the lining, hydrotestosterone smitten rock, the enrichment of the mass and its further dewatering, dewatering flooded reservoirs, cleaning fluids and recycling, characterized in that the hydraulic crushing layer are performed simultaneously with its impulse mechanical destruction by adding the stream of liquid abrasive material of high strength with higher weight characteristics than the rock, and then produce a separation of the abrasive material from the smitten rock at the same time with its hydrotestosterone and enrichment, the enrichment of the smitten rock, and partial separation from her liquid slurry with abrasive material produced by transport and mixing on the installation of the roller type, and flowing down the slurry with abrasive material through the pump system serves for cleaning, which produces the separation of heavy abrasive particles m the material from the rest of the pulp and the feeding of the abrasive solid particles smitten rock of a certain size, and then send saturated abrasive material for recycling, thus partially purified process fluid is mixed with the liquid obtained after drainage of flooded reservoirs, finally cleaned by cold evaporation and sent for recycling, while the portion of the purified process fluid is directed into the ventilation system of the mine workings and is sprayed into the air in the form of fine particles, and when working in mines continuously make measurements of air temperature, content of explosive particles and coal dust.



 

Same patents:

FIELD: mining.

SUBSTANCE: invention relates to mining and can be employed at development of deposits of minerals in form of an edge seam overlapped with mass of rocks of basic sediments by means of borehole hydraulic mining. The method of hydraulic borehole mining incorporates opening out a rock mass overlaying a producing horizon with a vertical borehole; then a successive boring of several producing inclined wells is performed out of this borehole in several directions along the pitch at a hanging wall, then up and down washing out of the horizon of deposits is carried out from producing wells, and as a hydraulic borehole device goes up, a case column is taken out; before termination of borehole washing out a required safety massif of rock is left at the upper portion of the borehole.

EFFECT: increased efficiency of hydraulic borehole mining of minerals and increased output owing to extension of development zone.

7 dwg

FIELD: mining.

SUBSTANCE: invention is referred to a mining industry and can be used in development of firm minerals. The method of hydro mining operations includes hydraulic crushing of a rock bed, hydro transportation of broken off rock, supply of stowing material in a worked out room using a pipe line. Loose rock is enriched and dehydrated, and the waste received at beneficiating of loose rock is blended with a pulp received at dehydration of loose rock. The obtained mixture is used for filling the waste area. Sacciform resilient perforated shell is put in the waste area. Further on, it is connected with the filling material pipe and filled with filling material under heavy pressure. The flowing fluid obtained by perforation is collected and sent for treatment and recirculation.

EFFECT: better filling reliability of the waste area and safety of mining operations, lower expenses for filling, improved ecological situation on mine and in its neighborhoods due to fluid recirculation in the technological process.

3 dwg

FIELD: mining engineering.

SUBSTANCE: bullet consists of external pulplifting pipe section 1 fitted with seal assemblers and inner water-and air delivering pipes 2 and 4, which upper ends are output from pulplifting pipes, lower end of water delivering pipe is fitted with checker 3, and lower end of air delivering pipe is fixed with sprayer 5. Inside pulplifting and air delivering pipes addition sectional pipe is installed 6 for delivering of warmed water and steam for defrostation of formations, which ends are derived beyond pulplifting pipe.

EFFECT: effectiveness improvement of excavation and working of frozen sedimentary strata.

5 cl, 3 dwg, 1 ex

FIELD: mining engineering.

SUBSTANCE: method includes reagent solution feeding in section for outside water bleaching, given for washing. At that outside water is divided in elementary fluent. Separate fluids are intermixing with reagent and unite them into common flow. Result is achieved by means of by fluids reagent feeding and more intensive mixing of flow with reagent.

EFFECT: effectiveness improvement of flocculation.

FIELD: machine building.

SUBSTANCE: environmental separation method in airlifting of submersible deposits of minerals and its implementation system which comprises lifted pipe, replenishment camera with a branch, feeding pipe, pump with force piping, air separator assembled on the lifted pipe, lifted pipe mixer connected to the force piping of the pump, compressor with a corresponding force piping, water separator assembled in an intermediate cross section of the pump force piping - separate accumulator, connected to a separate accumulator, and branch outgoing to environment, additional mixer connected to the pump force piping and to the compressor force piping, and fluid consumption sensor. Additional accumulator is installed in the intermediate cross section of the feeding pipe, and suction and force pipelines of an additional pump are tied to an additional accumulator. The separate accumulator comprises indicators of fluid level, suction pipeline of the additional pump is equipped with a tip, located in the additional accumulator. The force pipeline of the additional pump comprises pivotal position distributing valve, and blade wheel is installed in the additional accumulator. At that the force piping of the pump and the branch, connected to the separate accumulator, are equipped with corresponding controlled valves. The suction pipeline of the compressor is equipped with a filter and connected to an air separator, while a rotation speed sensor - a tachometer -is connected to the blade wheel.

EFFECT: improvement of environmental separation method in airlifting of submersible deposits of minerals; improvement of the ocean ecosystem.

2 cl, 5 dwg

FIELD: mechanical engineering, particularly underwater mineral deposit mining.

SUBSTANCE: method involves using system including lift tubing, supply chamber with connection pipe, supply pipe, pump with injection pipeline, air separator installed in lift tubing, lift tubing mixer communicated with injection pipeline and pump with corresponding heating pipeline. The system also has water separator installed in intermediate cross-section of injection pipeline. The water separator is made as independent accumulator. The system includes connection pipe attached to independent accumulator, additional mixer communicated with injection pipeline and liquid flow meters. Additional accumulator is arranged in intermediate transversal cross-section of lift tubing. Sucking pump pipeline and sucking compressor pipeline are connected with additional accumulator and air separator correspondingly. Independent accumulator comprises liquid level indicators. Sucking pump pipeline is communicated with additional connection pipe provided with controllable gate. Sucking compressor pipeline comprises filter. Consistometer is connected with supply pipe.

EFFECT: increased efficiency of continuous underwater mineral deposit element lifting due to increased marine hydraulic rams.

2 cl, 5 dwg

FIELD: mechanical engineering, particularly underwater mineral deposit mining.

SUBSTANCE: method involves lifting underwater mineral deposit members included in hydraulic mixture; creating multi-component mixture; injecting compressed air into hydraulic mixture flow; transporting multi-component mixture flow inside lifting pipe of marine airlift; supplying compressed air into separate water flow along with following conveyance of compressed air included in water-air mixture and supplying compressed air extracted from water-air mixture flow to lifting pipe of marine airlift. First of all hydraulic mixture flow rate in airlift supply pipe is set. Ocean stream energy is converted into electric power to be supplied to electric drives of airlift compressor and pump. Hydraulic mixture rate in marine airlift supply pipe is controlled and said controlled value is compared with predetermine value to provide equality between both values by regulation of depth of electric power station submersion in ocean. Said electric power station converts ocean stream energy into electric power.

EFFECT: increased lifting efficiency and ecological safety of underground mineral mining due to possibility of supplementary natural energy source usage.

2 cl, 6 dwg

FIELD: transport, mining and construction industry, particularly to convey carbon-containing suspension or pulp during mineral, particularly coal or slate coal, mining.

SUBSTANCE: sludge line comprises rigid pipes joined to each other and flexible elastic sleeve arranged inside the pipes. Space between the pipes and sleeve is filled with liquid having density at least equal to average pulp density. The sleeve is connected to rigid pipes through at least two hollow flexible centering tie members, which may supply gas and/or agent to damp medium turbulization near sleeve wall. Rigid pipes are connected with each other so that the pipes may perform mutual rotation in areas of pipe axes crossing.

EFFECT: extended functional capabilities of sludge line and simplified flexible hose floatability control in rigid composite pipes.

2 dwg, 7 cl

FIELD: mining, particularly to produce solid minerals from non-commercial and abandoned field including thin and ultra-thin horizontal productive reservoirs.

SUBSTANCE: rig comprises transportation base, derrick with supports, drilling pipe secured to movable rotation unit by the first drilling pipe end, upper block-and-tackle system including drill line, traveling block, crown block and lifting winch. Drilling pipe has drilling cutting-and-production tool connected to the second end thereof. Rig is provided with additional lower block-and-tackle system to advance drilling pipes and producing tools into productive reservoir horizon. Rig comprises several vessels adapted to be moved along with rig and arranged at different levels with respect to each other. The vessels entrap, precipitate and collect produced mineral in accordance to different fraction sizes. Rig also has pumping unit to supply flushing liquid from vessels into drilling pipes for drilling operation performing. The plant is mounted on separable rail track and may move over total field area.

EFFECT: extended functional capabilities.

2 dwg

FIELD: mineral mining and ground erosion, particularly pulsed liquid monitors and high-velocity jet devices.

SUBSTANCE: method involves twisting liquid jet under pressure to create at least two oppositely directed vortexes defined by swirled liquid jets with equal supply pressures having peripheries communicated with cavity having controllable elasticity; injecting additional high-pressure liquid in jet nozzle; mixing additional liquid with variable-flow swirled liquid jet. Device for above method realization comprises body 1 with vortex chamber 5, jet twisting channels 3, outlet nozzle 10, pressure pipeline 2 communicated with twisting channels 3, as well as central body installed in vortex chamber 5 so that the central body is spaced from vortex chamber 5 and space 7 is created in-between. The central body 8 has cavity with controllable elasticity 6 communicated with vortex chamber 5. The cavity is connected with outlet nozzle through said space 7. Twisting channels 3 are formed in at least two vortex chamber 5 cross-sectional planes and provide jet swirling in opposite twisting directions. The twisting channels are communicated with pressure pipeline 2. Device also comprises jet nozzle 4 adapted to create high-velocity constant-flow jet.

EFFECT: increased pulsed jet efficiency.

7 cl, 4 dwg

FIELD: mining.

SUBSTANCE: invention concerns mining and can be used at stratum development of minerals with swelled ground rock for guarding of district development drifts. Guarding method includes implementation of district development drifts 1, fixing of district development drifts, stratum weakening of minerals be making grooves 2,3. Powers of swelling layers of minerals stratum are defined. Stratum weakening is implemented by creating of vertical rooves 2,3 in sole, in the immediate vicinity of wall of working, from side of gradient and pitch of seam, at that groove length from side of gradient 2 is accepted as equal to maximal power of swelling stratum, but not more then 2000 mm, and groove length from the side of seam pitch 3 is equal to minimal power of swelling stratum.

EFFECT: decreasing of swelling of soil rocks, decreasing of costs for supporting district development drafts, increasing of spatial work concentration, providing of easier method of groove implementation.

1 dwg

FIELD: mining.

SUBSTANCE: invention concerns mining and can be applied in protection of surface and/or underground objects against undermining. The method involves defining the border 4 of the protected zone (PZ) 5 of object 2 in the form of geometrical position of the points located at distance equal to the width b of safety berm from outline 3 of object 2 and at distance of ri and rj along the given radius-vectors and from the central point O fixed within the border 4. The radius-vectors cross vertical axis (VA) passing through the given central point O. Then a side surface (SS) of the protected zone (PZ) 8 is formed by generating lines (GL) 9 oriented along the mentioned radius-vectors and and drawn from the border 4 under the displacement angles of alluvium (AS) 10 and parent rock (PRS) 13 solids, defined for each direction of and . Further from a crossing line of the SS with roof (RS) 13 and ground (GS) 15 surfaces of a mineral deposit (MD) 6 borders 16 and 17 of the protection pillar (PP) are defined against the mentioned RS and GS in the form of a geometrical position of the points located at distances and along and directions from the VA to the border 16 and at distances and to the border 17, while the values of these distances are defined by the functional dependencies with account to displacement angles of AS and PRS, dip angles MD RS and GS and the ground surface of AS, distances ri and rj from the VA to the border 4 at the respective directions, depth of MD RS and GS occurrence, alluvium thickness under the PZ and VA plane, height marks difference at the PZ base (or day surface) in the central point O on the VA and on points i and j where respective radius-vectors and cross border 3. Functional dependencies are defined according to the geometrical constructions and have the one form for PP area 1 at the downslope of the MD 6 strike line (SL) 7 crossing VA, and another form for the upslope area of SL 7.

EFFECT: ensuring sufficient safety of an object protected against undermining in any direction.

4 dwg, 2 ex, 1 tbl

FIELD: mining.

SUBSTANCE: invention relates to geotechnology and can be used in subterranean leaching the metals and ores, particularly to preparing ore bodies in deposit for leaching. The method includes the explosive loosening the ore deposits and supplying the process liquor. Explosion of the blast hole rings (11) is performed to shake the central solid of the ore body, and in the upper ore body, the peripheral perforations with branching cracks (10) are formed by pin-point explosion, to inject solutions.

EFFECT: invention provides even pattern sprinkling of the solid, even distribution of the leaching solution in its size at the minimal volume of preparatory first workings without ore shrinkage.

1 dwg

FIELD: mining engineering.

SUBSTANCE: debugging area of slope mine is divided into blocks of mineral resources. Blocks are prepared to debugging carrying out development workings 4-7. Blocks debugging are made consequently with long faces, equipped with scouring mechanised systems 2, without leaving between blocks mineral resources pillars. After termination of scouring works in long faces mechanised systems 2 are dismantled. At closing stage of block debugging after face finding 1 in one line with selvage a-b of mineral resources massive, appeared while block debugging which has the common boundary o-k with debugging block, scouring works are continued till upper roof rock fall in developed face bay and till face rock refuse 1 on its middle bay from fraction openings 3, appeared in upper roof while rock falling, on the distance b, equal to the width of face area.

EFFECT: costs decreasing connected with accomplishing of assembling-dismantling works, as well as a time cutting of their accomplishing and safety improving.

3 dwg

FIELD: mining engineering.

SUBSTANCE: method includes carrying out of face entry 11,13, main 1-4 and divisional 5-10 development workings, delineating of mineral resources blocks, assembling of scouring mechanised systems in face entries 11, consistent pairwise mineral resources blocks debugging with long faces N.1, N.2 and dismantling of scouring mechanised systems in dismantling chambers 12. Face entry of the second long face 13 deepen in line of dismantling chamber 12 of the first long face at first stage. At the beginning, by the moment of broken working termination in first long face deepens the area of the second long face, and located from side of mineral resources virgin ground. After termination of broken working in the first long face, face entry of the second long face is deepen till the mined-out space, appeared while debugging of the first long face. At that length of face entry unit of the second long face, debugged after broken working termination in the first long face, is taken more than boost band width, appearing in front of the first long face bank.

EFFECT: costs decreasing connected with accomplishing of assembling-dismantling works, as well as a time cutting of their accomplishing and safety improving.

1 dwg

FIELD: mining industry.

SUBSTANCE: invention relates to mining industry and may be used when mining potassium and coal beds with hard-caving roof, in particular, during mineral selective mining with partial stowing of worked-out area. The method to control hard-caving roof implies leaving of pillars, partial stowing of worked-out area with side and central packs from boundary and stowing (airway) entries of the face. Additionally, mineral is recovered from pillars and resulting space is gobbed, width h of additional mining being determined according to formula m, where L - length of place, m. The invention provides for increase in mineral recovery ratio by 15-30%, less amount of drivage, and roof caving control during working face travel, i.e. roof-caving increment being constant, with no adverse effect on the face operation.

EFFECT: increased mineral recovery ratio, less amount of drivage, roof caving control during working face travel.

1 dwg

FIELD: methods of underground mining, particularly to prepare permafrost roof rock for initial caving.

SUBSTANCE: method involves drilling belt entry and air way; cutting mounting chamber at excavation pillar boundary; installing mining complex and applying mechanical and thermal action to roof rock. As belt entries and air ways are cut slots are made in seam roof beginning from distance measured from excavation pillar boundary equal to expected initial caving increment. The slots extend for depth of not less than 1.5 m with slot plane inclination to horizontal plane of not less than 45°. After slot cutting hot air from local heaters is supplied into the slots.

EFFECT: decreased initial roof caving increment and increased safety along with equipment breakage elimination.

3 dwg

FIELD: mining, particularly methods of underground or surface mining.

SUBSTANCE: method involves drilling belt entry and air heading; cutting mounting chamber at extraction pillar boundary; installing mechanized complex in the mounting chamber and thawing permafrost roof rock by heat application; breaking roof rock in belt entry and air heading at distance equal to prospective initial roof caving pitch, from extraction pillar boundary along with at least 1.5 times entry and heading section increase; thawing roof rock with air heated by local heater; stacking cut rock in slashing having width determined from section of roof rock to be broken, seam thickness, rock loosening and slashing filling factors.

EFFECT: increased labor safety.

2 dwg

FIELD: mining, particularly underground flat-laying seam excavation with selective mineral excavation.

SUBSTANCE: method involves selectively excavating mineral in several cuts; controlling roof and arranging the cut rock interlayer in goaf; laying U-shaped boxes on seam ground so that the boxes are transversal to seam ground and are behind breakage face line, wherein the U-shaped boxes have surface opened towards seam roof; filling the boxes with gob from complex seam interlayers; laying pneumocylinder on the rock; supplying compressed air and compacting gob; unloading pneumocylinder; laying next U-shaped box on previously laid pneumocylinder, wherein the next box has dimensions exceeding that of previous one to create closed loop; supplying compressed air in pneumocylinder to expand U-shaped boxes between seam roof and ground; laying wooden washers on lower U-shaped box flanges along pneumocylinder sides, wherein wooden washers have heights exceeding that of deflated pneumocylinders; unloading and removing pneumocylinders after roof rock lowering so that upper box touches wooden washers.

EFFECT: decreased mineral losses and increased roof control efficiency.

8 dwg

FIELD: mining, particularly methods of underground mining.

SUBSTANCE: method involves cutting mineral seam in chambers along with rock strips erection in chambers and mineral rib pillars leaving; laying U-shaped boxes on seam ground so that the boxes are transversal to chamber ground and are behind chamber face line, wherein the U-shaped boxes have surface opened towards seam roof; filling the boxes with gob from complex seam interlayers for height determined from mathematical expression; covering U-shaped box filled with gob with next U-shaped one having greater dimensions and surface opened towards seam ground to create closed outline of the first layer; creating closed outline of the second layer on the first layer outline by arranging U-shaped boxes transversely to that of the first layer, wherein pneumocylinders are inserted in U-shaped boxes of second layers and have surfaces opened towards seam roof; closing pneumocylinders with U-shaped boxes having greater dimensions and surfaces opened towards ground; filling pneumicylinders with compressed air and expanding boxes of the first and the second layers between seam roof and ground; unloading and removing pneumocylinders after bringing the second layer pneumocylinders together under the action of rock pressure; laying wooden washers in place of pneumocylinders location.

EFFECT: increased performance and decreased mineral losses due to increased chamber width.

6 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

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