Method for combined development of bed series
SUBSTANCE: method includes exposure and development of reserves by open-cut method, exposure, preparation and working-out the reserves in cut edges by underground method, transportation of rock mass and maintaining protective pillars. When eliminating the front of open mining at safety distance there performed is an exposure of underground mining unit in cut edge that includes several beds. There passed are ventilation and pulp-haulage drift ways that are cut by pulp-haulage roadway, and from the surface there drilled are wells along coal beds till pulp-haulage roadway. Broken working is done from well upwards and downwards by hydraulic or drill-hydraulic methods, and pulp transportation is done by wells and pulp-transportation mines till draining complex.
EFFECT: invention allows increasing the coefficient of mineral resources extraction and reducing environmental losses.
6 cl, 2 dwg
The invention relates to the mining industry and can be used in the development of bedded deposits.
There is a method of hydraulic borehole mining of solid minerals from the inclined layers , including excavation unit placed on the ledge career and oriented in the direction of the layer mineral (PI). On the border of the block into deep parts of the reservoir drilling a well for the issuance of PI before entering it into the soil layer, after which the hole grow from the mouth to the roof of the reservoir.
In the formation of the mineral produce a jet for the formation of an inlet chamber, a well equipped pulp-raising equipment. In the Board's career through the formation of the Buryat one or more production wells until breakthrough of their reception by the camera issue well, and the angle of inclination of wells equal to the angle of incidence of the reservoir. Production wells will be equipped with giant shell side nozzles. Getrootpane PI produced in the process of moving giant shell in the production well for the uprising of the reservoir. The resulting pulp enters the receiving chamber of the dispensing hole, and from it using pulp-raising equipment is given to the surface.
The disadvantage of this method is the limited conditions of use.
The known method buergerliches development thin the average power layers , including mines and sewage extraction of rock buergerliches way with hydrotransport slurry, characterized in that in order to ensure ventilation at the expense of mine depression, additional water for flushing the rock mass, unloading rock mass and maintain the specified direction of the treatment wells, excavation of minerals produced in three stages: at the first buergerliches way carried out ahead of a parallel vent wells along the strike of the column with a diameter of 100-200 mm with step length equal to the sum of the radius of the extender well and pillar width, ensuring integrity of the well at the time of sewage extraction, on the second notch of the rock mass are due to the extension of the well at full capacity of the reservoir, this water serves to vent production, as in the well wound high-pressure hose with a nozzle attached to the rod by which the third stage is performed during reverse motion of the rod repayment pillar hydraulic method at a pressure of 5-6 MPa, and erosion of the rock mass is preserved through the hole.
The disadvantage of this method is the complexity of technology.
The closest technical solution adopted for the prototype is the way to develop an inclined layer of solid mineral IU the Odom hydraulic borehole mining . The method includes excavation unit placed on the ledge career and focused on dip mineral (PI). On the border of the block in the deep parts of the reservoir Buryats issued well before entering it into the soil layer, after which the hole grow from the mouth to the roof of the reservoir. In the formation of PI to produce a jet for the formation of the reception chamber, and then the well was equipped with a pulp-raising equipment. A necessary condition for the implementation of the method is the construction along the above-mentioned boundary extraction unit to the breakthrough with a receiving cell vydatnou wells transportation tunnel with a gradient from 4%to 8%. Transport development pulp goes from the peripheral part of the layer PI in the receiving chamber, and from it using pulp-raising equipment is issued on the surface. In the Board's career in the seam PI drilling the number of parallel production wells that are hydraulically connected with transport development. Production wells will be equipped with giant projectile. Getrootpane PI produced in the process of moving giant projectile in production wells from traffic generation to Board career. Based on the way the sinking of the transport development of the invention can be implemented in 2 ways: transport and production are by jet formation PI of auxiliary wells, p is oboronnyh on the boundary of the excavation unit, and transport production form by jet formation PEE in critical areas of the production wells.
The disadvantage of this method is the limited conditions of use.
The objective of the invention is to improve the extraction of mineral resources, technology simplification and reduction of environmental damage.
The solution of this problem is achieved by the fact that removing the front surface mining at a safe distance produce the opening of the block underground mining in the Board section comprising several layers, ventilation and pulponasosnoj galleries who go astray purpureipennis the roadway, and from the surface drilling of wells for coal to pulpiteering drift, sewage treatment works are from the well up and down hydraulic or buergerliches ways, and transportation of pulp perform well and purpureipennis to the complex workings of dehydration.
Between the treatment chambers (benches) lay the coal pillars to ensure sustainability at the stage of joint management of surface and underground works.
Well connected to the network degassing pipeline, which is accumulated methane-air mixture at the degassing reservoir and carrying out cleaning work.
Complex dewatering of the pulp is placed in the trench section Il is in the underground dewatering chamber depending on the climatic conditions of mining operations.
After the cleaning work, the developed space used for placement of overburden section by filing through the hole.
When the depth of the open development of more than 100 m may divide a block of underground mining operations at several tiers.
The invention is illustrated by drawings, where figure 1 gives the schematic of Stripping and development of a coal Deposit; figure 2 - cross section along the layer.
At the initial stage of the field development is carried out in an open way from trench 1, held by the most powerful layer 2 in the retinue, when removing the front surface mining at a safe distance produce underground hiding layers 3, 4 in the Board trench 5 ventilation adit 6 and pulponasosnoj galleries 7 who go astray purpureipennis the passage 8, when the depth of the open development of more than 100 m may divide a block of underground mining operations at several layers 9, 10.
Surface drilling of wells 11 coal seams 3, 4 to pulpiteering drift 8 sewage treatment works are in the chambers 12 of the bore 11 from the top down hydraulic or bottom-up buergerliches ways, and transportation of pulp is performed in the wells 11, pulmotension the roadway 8 and pulponasosnoj the adit 7 to complex dehydration 13 placed in the trench 1 or underground dewatering chamber 14 depending on the climatic conditions of mining operations.
Between the treatment chambers lay of the coal pillars 15 to ensure sustainability on the stages of conducting surface and underground work, and after excavation of coal in the treatment chambers are placed overburden section 16.
In advance and in the conduct of treatment works well 11 is connected to the network degasification gas line 17 leading to a vacuum pump 18, in which is accumulated methane-air mixture.
Applied technical solutions allow to increase the coefficient of extraction of mineral resources and to reduce environmental damage to the environment.
SOURCES of INFORMATION
1. RF patent №2235882, MKI E21C 45/00. Way of a hydraulic borehole mining of solid minerals from the inclined strata. / Viewnew, Vmigo, Daendels and other Publ. 10.09.2004.
2. RF patent №2170821. The way buergerliches the development of thin and medium-capacity reservoirs. IPC E21C 41/18. Patentable. authors: Kondratov IV, Fomichev YEAR, Senkus VV, Senkus Shaft. C. Appl. 15.12.1999. Publ. 20.07.2001. Bull. No. 20.
3. RF patent №2235881. How to develop an inclined layer of solid mineral method of hydraulic borehole mining. MCI E21C 45/00. / Viewnew, Vmigo, Daendels and other Publ. 10.09.2004.
1. The method of combined development suites layers, including the opening and development of reserves in an open way, Stripping, preparation and mining Zap the owls in the sides of the incision underground, transportation of rock mass and leaving the security pillar, wherein when removing the front surface mining at a safe distance produce the opening of the block underground mining in the Board section comprising several layers, ventilation and pulponasosnoj galleries who go astray purpureipennis the roadway, and from the surface drilling of wells for coal to pulpiteering drift, sewage treatment works are from the well up and down hydraulic or buergerliches ways, and transportation of the pulp perform well and purpureipennis to the complex workings of dehydration.
2. The method according to claim 1, characterized in that between the treatment chambers-benches lay of the coal pillars, to ensure sustainability at the stage of joint management of surface and underground works.
3. The method according to claim 1, characterized in that the wells connected to the network degassing pipeline, which is accumulated methane-air mixture at the degassing reservoir and carrying out cleaning work.
4. The method according to claim 1, characterized in that the complex dewatering of the pulp is placed in a trench cut or underground dewatering chamber depending on the climatic conditions of mining operations.
5. The method according to claim 1, characterized in that after the treatment works produced about transto used for overburden section by filing through the hole.
6. The method according to claim 1, characterized in that the depth of surface mining of more than 100 m may divide a block of underground mining operations at several tiers.
SUBSTANCE: method consists in mining of the deposit with wells, creation of a cavity, and destruction and change-over of mineral product to hydraulic mixture. Mixture is mixed and hollow rock is deposited at the bottom of the formed cavity; coal-water suspension is pumped out to the surface and transported via pipes to the consumer. In order to destruct mineral product, high methane content of coal beds is used; at that, methane content in the formed cavity is controlled; and when the most explosion hazardous concentration of methane, which is equal to 10%, is achieved in that cavity, explosion is initiated. After mineral product is delivered to the consumer, the whole cycle of works is repeated. In order to prevent methane ignition, its concentration is reduced to explosion hazardous one by releasing methane via wells to the surface to consumers.
EFFECT: invention allows increasing the safety and efficiency of mine works owing to using internal energy of mine rock massif.
SUBSTANCE: method includes mining of a coal bed by chambers in an ascending order by a hydraulic method from surface and using underground mines, drilling machines, hydraulic monitors, and also a hydraulic elevator. At first a well is drilled from surface to the bed at the side of the roof, where pipes are placed for the hydraulic monitor, hydraulic elevator and methane suction, afterwards coal excavation starts in a split slot. Then another well is drilled in the produced slot along the coal bed, where pipes are installed for the hydraulic monitor and methane suction. Besides, in process of coal excavation in a chamber along bed rise with usage of underground mines the coal pulp arrives to an accumulating drift, which replaces the hydraulic elevator. At the same time methane is also sucked along the pipes to the surface.
EFFECT: wider area of method application, higher safety of minerals mining.
FIELD: machine building.
SUBSTANCE: method involves lifting of elements of underwater mineral deposits consisting of flow of transporting medium, transportation of hydraulic fluid in supply airlift pipeline, supply of compressed air to mixer of lifting pipeline, creation of multicomponent mixture after compressed air is supplied to hydraulic fluid mixture and transportation of multicomponent mixture flow in lifting airlift pipeline. At that, first, phantom cross section is chosen in the flow intended for transportation of elements of underwater mineral deposits, and for chosen phantom cross section there specified is the range of change of pressure value. Flows of water and air-and-water mixture are created in supply and lifting pipelines by supplying compressed air with the compressor to mixer of lifting pipeline Value of actual pressure is monitored in the chosen phantom cross section, as well as actual range of change of the monitored value is determined. Compliance of the certain actual range to the specified one is checked, and elements of underwater mineral deposits are supplied to water flow of supply airlift pipeline in case certain actual range belongs to the specified one.
EFFECT: increasing development efficiency of underwater mineral deposits at big marine depths due to shortening the total start-up time of airlift plant; avoiding the disturbance of transportation of solid material and gumming of pipelines during airlift start-up.
2 cl, 3 dwg
SUBSTANCE: method to extract materials from thick underground formations is carried out by means of formation opening with a well, placement of a well hydraulic monitor unit in it, creation of a naturally balanced vault above a production chamber within the productive horizon and washout of formation rocks with pulp delivery to the surface. In order to increase efficiency of well hydraulic production of minerals, excessive pressure is pulled in the production chamber, which meets the following condition: Pchamb.≥Pform.+0.03 MPa, where: Pchamb. - pressure of working fluid in the production chamber, Pform. - formation pressure. At the same time the pressure in the chamber is continuously monitored with sensor installed in lower and upper parts of a movable pipe of the hydraulic monitor unit, and the excessive pressure in the production chamber is provided by control of the working fluid supply into the well, with high-quality of hydraulic insulation of the annular space with mortars based on bentonite powders with specific viscosity from 50 sec. until "non-liquid" state.
EFFECT: higher efficiency of well hydraulic production of minerals.
2 cl, 1 dwg
SUBSTANCE: method involves mining activities performed during summer season by water jet by means of devices installed in underground cavities pre-drilled from surface of the well along longitudinal axes of pillars at certain distance from each other with pulp lifting to the surface and its supply via pulp line to flushing device in order to extract useful component and laying of dehydrated flushing remainders formed during washout process of sands so that distributed filling masses are formed. Pillar recovery is performed in two stages during two years. During the first year the pillars are recovered partially so that gaps are left between cavities washed out between them, which are developed using the same method in the next year; at that, in order to strengthen compression properties of filling masses, they are frozen with natural cold during winter period.
EFFECT: avoiding execution of underground mine workings at pillar extraction; possibility of selective development of technogenic deposit; arrangement of dehydrated flushing remainders in the worked out space and its complete use; avoiding cavings in the ground surface; recovery of rock mass continuity and stabilisation of its temperature mode; minimum contamination of environment; eliminating the necessity for execution of recreation works.
SUBSTANCE: method of hydraulic borehole mining of mineral resources at inclined position of beds involves construction of hydraulic mining and auxiliary wells. Hydraulic mining and auxiliary wells are located in lines along the strike of inclined beds and cross them. Bottoms of vertical hydraulic mining wells are drilled downstream, and bottoms of auxiliary wells having vertical and inclined parts of well, the vertical part is drilled to similar inclined beds and the inclined bed enters similar productive formations, both from upper beds and within productive formations, and is directed towards hydraulic mining wells. Distance between location lines of hydraulic mining wells and auxiliary wells is determined with stability of inter-layer beds-bridges of the worked out area of loose ore beds, and distance between hydraulic mining wells and between auxiliary wells is determined with technical drilling capability of inclined branches towards hydraulic mining wells providing disintegration of loose ores between location lines of hydraulic mining and auxiliary wells of all similar beds subject to development and crossed with hydraulic mining and auxiliary wells.
EFFECT: increasing the scope of mining operations, controlling the mining volume of ore mass as to depth of hydraulic mining well, reducing the scope of construction work of hydraulic mining wells and operating equipment on mining per unit of time.
2 dwg, 2 ex
SUBSTANCE: device includes pulp lifting pipe string with pulp removal head, which is installed inside casing string of the well, air supply pipe string with nozzle provided on its lower end, which is installed inside pulp lifting pipe string with possibility of vertical movement through the head, water supply pipe string installed inside air supply pipe string and having the outlet through side surface of suction tip. Steam supply pipe is installed in upper part of water supply pipe string; there is flange coupling on casing string and pulp lifting pipe string, which tightens those strings between each other; air supply device with two cocks and pressure gauge is installed on casing string below flange connection; inside pulp lifting pipe string there installed is additional water supply pipe string the lower end of which is located on the level of lower end of suction tip and level metre the upper end of which is passed through flange coupling and tightening device, and the jack connected to one of inner pipe strings is installed on the head cover.
EFFECT: improving development efficiency of underground reservoir in permafrost sedimentary rocks.
4 cl, 2 dwg
SUBSTANCE: development method of underground reservoir in permafrost sedimentary rocks involves drilling of sand permafrost formation with a well, installation of process columns in it, supply of water, compressed air, heat carrier via them, development of working-out-capacity by thermal destruction of frozen rocks and air-lifting of developed hydraulic fluid of sand to the surface with water supply for weighing of deposit to the air-lift suction zone and additional water to working-out-capacity with control of water-air boundary level position by regulating the flow of supplied water. Well head is tightened and excess pressure is increased in underground reservoir by supplying compressed air to the well; during thermal destruction of frozen rocks there used as heat carrier is steam which is supplied with constant flow together with additional water; additional water flow is changed to control the water-air boundary level position, and recirculated water forming during separation of sand from lifted hydraulic fluid is supplied to weigh the deposit.
EFFECT: improving development efficiency of underground reservoir in permafrost sedimentary rocks.
SUBSTANCE: method includes coal bed extraction in sub-levels with the use of hydraulic mining and pressure tight bulkheads. First, sublevel drifts are put to the boarder of mine section, then, as far as the coal is extracted in the sublevel entry way there installed is portable pressure tight bulkhead with pipe and duct for the output of coal slurry and concurrent methane exhaustion from near-well bore area. Note that after sublevel working out methane exhaustion is continued from the ducts installed in pressure tight bulkheads.
EFFECT: complex and rational use of coal in subsurface resources ensured by concurrent methane extraction, reduction of coal prime cost, safe mining.
SUBSTANCE: invention relates to mining, in particular mechanised face complexes for underground development of mineral deposited in sloping beds. Mechanised face complex for production of mineral deposited in sloping beds, its development in large blocks and delivery of these blocks by escalators, includes sections of powered support, hydraulic cutting cleaning machine with rolls, providing for its motion, to cut the mineral from bottomhole massif in large blocks with the possibility to cut transverse slots while hydraulic cutting machine is immovable, and to cut back vertical slot by means of continuous motion of hydraulic cutting machine with actuators and hydraulic cutting heads joined via metal tubes, on which they are rigidly fixed, with water supply manifold, outgoing from multipliers that impart ultrahigh pressure to water, hydraulic booster installed with the possibility of its continuous feeding with water and emulsion by means of continuously joined hoses of hydraulic cutting machine to water supply and emulsion manifolds, layer of manifolds for provision of possibility to re-arrange specified manifolds as hydraulic cutting machine moves and changes its direction of movement in process of idle run. Hydraulic cutting machine is arranged with the possibility to cut longitudinal slots parallel to plane of bed, simultaneously to cutting of back vertical slot with application of special hydraulic cutting untis, hydraulic booster is arranged with the possibility to feed water of ultrahigh pressure at actuators providing for cutting of back vertical and longitudinal slots as hydraulic cutting machine moves, and while hydraulic cutting machine is immovable - with the possibility to feed all water to actuators providing for transverse hydraulic cutting, besides lengths of all sections along length of long face of continuous cutting of transverse slots at one side and back vertical and longitudinal slots at the other side are identical. At the same time complex is equipped with suspended platform joined at goaf side of the second escalator to move long face of hydraulic cutting machine along it by means of electric drive connected to driving sprocket engages with track chain arranged in cute also laid in suspension platform, and body of track chain holds all communications providing for operation of hydraulic booster: emulsion discharge and drain manifolds, water manifold and electric cable.
EFFECT: increased efficiency of cleaning face, provision of high safety level, reduced release of gas and dust into atmosphere of long face.
4 cl, 10 dwg
SUBSTANCE: method involves driving of underground opening along the open-pit perimetre in its side part, drilling of rings of wells, arrangement in wells of anchors, which are reinforced with solidifying solution. Besides, upper and lower extreme wells of the ring are drilled in the plane perpendicular to longitudinal axis of underground opening and made as through wells; a cable wire is passed through wells; the cable wire ends are taken to underground opening; tension of the cable wire is provided; after that, both wells are filled with concrete, and the cable wire section located beyond the wells are passed above metal mesh arranged on the surface of bench slope. Besides, at mouths of through wells there installed are anchor locks made for example in the form of support shoes with the diameter corresponding to 3-5 diameters of the well.
EFFECT: improving the reinforcement efficiency and reliability of local sections of fractured rock mass.
2 cl, 7 dwg
SUBSTANCE: method of working-out backfilling in flooded potassium mine involves well drilling, preparation of pulp by mixing carrying liquid and solid particles, supply of pulp through wells to flooded working-outs, and backfilling of working-outs. Drilling of injection well and well for liquid pumping-out is performed from day surface to flooded working-out meant for backfilling. Carrying liquid for pulp preparation is taken from flooded backfilled working-out on the level of its soil through the nearest well of the drilled wells. After excess pressure appears on the mouth of the injection well, pulp is supplied continuously; total supply volume of pulp solid particles to the mine through the injection well does not exceed the volume of possible liquid filtration through a sinkhole formed during flooding of potassium mine.
EFFECT: invention allows reducing the deposition of ground surface above flooded mine owing to preventing probable leaching.
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.
SUBSTANCE: in the method to mine gravel deposits, including contouring of balance reserves by data of exploration wells, opening of a sand bed, performance of opening and production works, after contouring of balance reserves the opening works are carried out with solid transverse trips into a dump to the level of the maximum elevation of the balance reserves contour. Production works are started by slabbing with a bulldozer in the area of the maximum elevation of the balance reserves contour with transportation of sands into a mined space. Each subsequent lifting of the balance reserves contour is mined in the similar manner, peats located between lifts of the balance reserves contour are transported through slabbing with secondary displacement into the dump.
EFFECT: reduced operational losses of a useful component.
SUBSTANCE: method to produce inert materials from aggradational deposits of mountain river beds, including diversion of a water stream away from production borders with the help of gutters and dams without violation of coastal zone borders and safety benches. The stage production of rock mass and controlled wash of river sediments into a mined space of a pit along an inclined mine (trench). On the opposite board of the pit from the water conduit (current river bed) they form a separation zone with ledges protruding towards a mined space, and the inclined mine (for water conduit) stretches in direction of the separation zone. In process of controlled wash they carry out separate deposition of coarse and find fractions of sediments.
EFFECT: higher efficiency of production in limited areas without violation of coastal zone borders due to controlled formation of localisation zones in the mined space of the pit differing by size of aggradational sediments.
SUBSTANCE: method of blasting of rock mass includes preliminary zoning of rocks by fracturing, mosaic structure and blastability thus determining elementary uniform sections and subsequent updating of zoning during mine works. Elementary uniform zones are formed by size and output of slurry in near-wellbore corresponding by height to three zones - location of stemming, location of charge above and below bench bottom. According to characteristics of elementary zones parameters of drilling and blasting operations are determined, at that characteristics of slurry of elementary zones of charge level are used to determine parameters of drilling and blasting operations, and characteristics of slurry of elementary zones of stemming level are used to update parameters of drilling and blasting operations.
EFFECT: improving efficiency of drilling and blasting operations due to reduction of expenses of drilling and blasting and due to reduction of losses of wells caused by rockfall, improving quality of rocks fragmenting and development of bench bottom.
SUBSTANCE: method includes formation of safety berms, which mutual arrangement and width provide equality of stable and constructional angles of slope of non-working wall within zone specified by open-pit depth and providing location rockslides and rockfalls on berm which are not to be removed during functioning of the wall. At that development of upper zone of open-pit is done using longitudinal and transverse panels with mining works performance from the central part of open-pit to its periphery and towards bank fall with diminishing of open-pit walls under specified angles obtained considering allowance for wall curvature in its lower part without any limitations by parameters and form of pit-end extraction. Optimisation of proportion of retaining and shearing forces effective on the weakest surface of potential rockfall provides reducing of high-altitude zone developed by sections curvilineal in plan to the zone minimal but sufficient for provision of stability of non-working open-pit wall.
EFFECT: rising angles of walls diminishing, reducing volume of overburden operations and optimisation of mining-and-transport equipment operation.
SUBSTANCE: method includes digging of workings for dividing of ore body in blocks, stage extraction of ore by chambers. After dividing of ore body into panels, blocks and chambers, development of chambers is done in staggered order as to ore body rise by the scheme I-III-II-IV as shown in dwg. 1-5. At that bottoms of adjacent chambers I (II) and III (IV) are displaced by one sub-level. Broken ore is transported from the chamber to bottom gangway along delivery crosscut drifted in the middle part of adjacent chamber which is used as drilling crosscut during its development. Development of ore of upper part of chambers is performed between artificial pillars from consolidating stowing mass, and of lower chamber - in ore rock. Coefficient of form Kf=bu/hp size of ore pillar corresponds to the following condition: 0.5<bu/hp<1, where: bu - width of ore pillar and width of undeveloped chamber, m; hp - height of ore pillar or half height of undeveloped chamber, m.
EFFECT: invention allows reducing overburden pressure on the elements of development system, reducing losses and ore impoverishment.
3 cl, 6 dwg
SUBSTANCE: all pillar erection operations are performed during winter period after the development of cleaning chamber in alluvial well is completed. A vertical well of large diameter (500-600 mm) is pre-drilled from surface above the developed chamber, under which an underground construction of a moving frame is performed; the above frame is filled with crushed rock mixture formed during summer sand flushing at flushing plants and contained in dumps. Then, mixture is compacted by means of vibration machines and warmed up for a short period of time with its being moistened with superheated steam supplied at high pressure from steam-generating plant in quantity of at least 10 m3 per 1 m of the mixture. After that, frozen rock mixture - pedestal-shaped pillar is frozen in addition with cold air induced with a fan, thus providing high compression properties.
EFFECT: invention allows reducing useful mineral losses and water consumption, increasing pillar erection speed and preventing the deformation of ground surface above developed mine field.
SUBSTANCE: method involves formation of non-working projections, transport offramp, horizontal and inclined safety berms. Inclined safety berms are formed in places of their junction to transport offramp. Slope of sections of inclined safety berms is restricted in compliance with technical characteristics of machines and mechanisms used for cleaning of safety berms from rockslides and rockfalls.
EFFECT: reduction of volume of development operations and improvement of conditions of mechanical cleaning of safety berms from rockslides and rockfalls.
3 cl, 2 ex, 5 dwg
FIELD: mining industry.
SUBSTANCE: invention comprises following scheme. Oil is produced from producing wells. Potassium salts are extracted from mines and processed. Solutions are pumped into deep lying porous rock formations preliminarily revealed between oil-bearing and potassium formations. Those porous rock formations are chosen which are located below underlying stone salt. Pumping of solutions is effected through injecting wells until pressure drop in oil-bearing formation is compensated to a value sufficient to prevent deformation in potassium formations, this value being calculated using special math formula. Oil formation is then run while maintaining compensating pressure in chosen porous formation.
EFFECT: significantly reduced environmental loading and increased safety of mining operations.
3 cl, 1 dwg