Method for selective extraction of coal bed of variable thickness

FIELD: mining.

SUBSTANCE: method for selective extraction of coal bed of variable thickness includes preparation of extraction pillar by developing coveyour and ventilation drifts, breaking and loading the broken-down coal onto a face conveyor with the cutter-loader, destroying the under roof massive with a dynamic effect from the part of the support section with a striker and drawing the under roof massive onto the face conveyor. Separation of rock mass flows of is carried out due to temporary pauses arranged when they are loaded into a vehicle - the face conveyor. When preparing the extraction pillar by drilling wells into the massive above the heading, the thickness and the reserve volume of coal and raw materials, containing valuable elements are monitored. Identify geological disturbances-crimps and their spatial orientation within the excavation pillar. When approaching the crimp zone, the crown pillar is drilled with a number of inclined holes, the drill cuttings are collected and sent for analysis. If the extraction of the crimp zone interlayer rock is feasible then when entering the crip zone, breaking and loading of coal are suspended. After cleaning the face conveyor with the striker, the interlayer rock of the crimp zone undergoes the dynamic effect, then perform breaking, drawing and loading onto the face conveyor. After the loading of the interlayer rock of the crimp zone, the operations for breaking and loading of coal are repeated.

EFFECT: invention enables to increase the efficiency of selective extraction.

7 dwg

 



 

Same patents:

FIELD: mining.

SUBSTANCE: method comprises preparing a panel by carrying out in-seam workings in the upper layer, followed by workings in the lower layer and joint mining layers in reverse order. To prepare the excavation site the ventilation and conveyor gates on the upper and lower layers to the border of the panel are carried out, where they are connected by mounting cameras in which the mechanized complexes are mounted. On the rear fences of hydroficated baring of the upper layer the additional fences are mounted, moving on rollers on the upper lining of the hydroficated baring of the lower layer. When leaving the pillars on the flanks of stope in the upper layer in hydroficated sections of the baring mounted on the flanks in the lower layer, the windows are equipped for release of carbon to the face conveyor. When non-pillar method of preparing on the conveyor and ventilation gates of the lower layer, travelled with coal-cutting with stone to gates of the upper layer, the face-end support is mounted, on which the sections of the hydroficated baring of the complex of the upper layer are moved.

EFFECT: invention enables to increase the safety and the concentration of mining operations, and reduce the amount of development workings on the rock.

8 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for mining. The method of methane capture during mining of coal layers by a power mining complex comprises the mining of a coal layer using the sections of a powered roof support with box-shaped top covers of a face conveyor and combine. Simultaneously with coal extraction, transportation through a face and preparatory developments, through the holes in the box-shaped top covers and telescopic branch pipes methane is pumped out. From a production face all box-shaped top covers of sections are joined among themselves with corrugated branch pipes of a certain length equal to an advance increment of the powered roof support.

EFFECT: invention allows to implement the comprehensive and rational coal use in subsoil due to efficient by-product extraction of methane, reduce net cost of coal, provide safe mineral development.

3 dwg

FIELD: mining.

SUBSTANCE: as per a shield mining system, the method involves field preparation of a mine section of a bed developed by transport and ventilation crossways, division of the mine section as to spread of the bed into extraction strips restricted as to width by performance of two inclined workings, provision of an installation chamber on the level of the ventilating entry, installation in it of sectional shield roofing, development of coal wells, extraction of coal under the shield roofing and gravity handling of broken-down coal via coal wells to the transport entry. Before the beginning of coal extraction, the first inclined working is performed so that it restricts the extraction strip on one side. On the other side, the extraction strip is restricted with the number of sections of the shield roofing. Extraction and cutting of coal under the shield roofing is performed in a mechanised manner in beds that are provided with an inclination towards the first inclined working, and gravity handling of broken-down coal is arranged via chutes along a working face. As far as inclined beds are being developed, on the other side of the extraction strip, in the worked-out area there erected is the second inclined working providing a spare exit of the working face and its ventilation. As far as the working face approaches the lower boundary of the extraction strip, execution of the transport entry is performed in the direction from the second inclined working to the first one. From the same entry, wells are drilled in line with each section of the shield roofing, via which gravity handling of coal broken down under the shield roofing is performed.

EFFECT: invention allows improving efficiency and safety of development.

8 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining, to mechanised steep bank excavation of medium power in bands down dip. The method comprises preparation of the extraction column and extraction band by mining. At the junction of the mounting chamber with coal chute the second mounting chamber is made, which workspace is supported by face-end support strutted between the roof and the layer soil. Each layer of the soil is imparted with the horizontal gradient of not less than the angle providing gravity handling of the chipped coal on the chutes. The multislice mining of coal is carried out using a swept cutter tool, made in the form of a horizontally oriented drum with cutters mounted on the sides of the front section of the chute. Supply of the cutting tool is carried out by moving the front section of the chute to bottom hole, its moving in the opposite direction is carried out by moving the front section of the chute towards the coal chute. The direction of the drum rotation of the cutting tool provides cutting coal from the bottom upwards. The chute flight is enlarged using spare chutes, and the second mounting chamber is elongated to the extent of mining the layers in the band. Removal of stabilising pillar is carried out using cutting actuating tools of the sections of the expanding shield overlap.

EFFECT: invention enables to improve the efficiency and safety of mining by organising gravity handling of chipped coal.

3 dwg

FIELD: mining.

SUBSTANCE: method of complex development of coal deposits comprises drilling the system of blast injection and gas removal holes that are hydraulically connected by the coal bed, the implementation through them of the hydrodynamic influence to form a zone of artificial cavities and cracks and fire impact on the coal bed to form a combustion source displaced from the blast injection hole towards the gas removal hole, obtaining crude producer gas, cooling it to a temperature below the condensation temperature of the components in the composition of the crude gas, and obtaining together with the purified gas other beneficial components. The attribute of the method is that in the space between the blast injection and the gas removal holes the series of feeding holes is drilled equidistant from each other from the surface into the zone of artificial cavities and cracks, into the combustion source first by blast injection, and then, as displacement of the combustion source and along the feeding holes the mineral dust is supplied, containing chemically active element, at the output of the gas removal hole the producer gas is separated, isolating from it the gaseous compounds of valuable chemical elements and converting them into free-running state for removal of valuable elements.

EFFECT: improving the efficiency of complex development of coal deposit.

1 dwg

FIELD: mining.

SUBSTANCE: method comprises sinking of gate road on two seams, holed by slopes, airing dead ends using ventilation systems of local ventilation and broken ore supply from sinking of gate road on the upper seam through the pre-passing wells to the conveyor line mounted on the lower seam. The gate and the belt roads along the lower seam pass in direct order to the border of the working area and their airing is carried out by general shaft depression on turning point scheme using the most remote inter-gate holing. Then sinking of spiral slope to the upper seam is carried out, and then in reverse order the gate road is passed on the upper seam with its airing through the wells, with the fans mounted on them. After holing of the gate road with air gates of the upper seam, airing is carried out on turning point scheme with the movement of air in the direct order on the workings on the lower seam, and with a backward motion of air in the workings of the upper seam.

EFFECT: invention enables to increase the efficiency of development by reducing the scope of development workings and time for preparation of the working area.

3 cl, 5 dwg

FIELD: mining.

SUBSTANCE: coal-rock technological complex of industrial site comprises the powerhouse of the slanting hole with the premises of coal-preparation, the coal-rock gallery, the rock hopper, the boom of scattering coal to the warehouse, the receiving funnels with the output to the station of loading coal to the cars. In the premises of the slanting hole coaxially in the vertical plane, the tray of the remote drum of the inclined conveyor is located, the drum crusher, the loading devices - coal and rock with terminal end heads of the coal-rock conveyor belt. In the coal-rock gallery the four-floor band blade for the rock and coal, the driving head with tension device and the remote drums are located - the rock over the rock hopper with window and tray, the coal over the loading device of the swinging boom. The point of interspersing of coal flow is combined with the axis of rotation in the horizontal plane of the swinging circle of the boom, the fixed base of which is fixed to the rock hopper, partially overlapping it from above.

EFFECT: invention enables to increase reliability of operation of the device and reduces the cost and time of construction of mines.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method of development comprises preparing of the extraction column carrying out conveyor and ventilation drifts, preparing of winning band by performing off end and near slopes along the downwards line at the soil of layer from the conveyor to the ventilation drift on both sides of the band, performing the mounting chamber at the ventilation drift, mounting of sections of aggregated timber in it, coal extraction with low-inclined layers by the shearer of front action and transportation of coal along the bottom hole of self-propelled car to off end slope , in inclination of the extracted layer towards the near slope, or to the near coal chute slope, in inclination of the extracted layer towards the off end slope, change in the direction of inclination of the layer and turn of the combine in the chamber, which is carried out outside of the winning band. And the self-propelled car is equipped with an automated control system. At that from the overlap of each section of the aggregated timber towards the soil layer a signal is given, corresponding to the order number of the timber section, this signal is received by the receiving device mounted on the self-propelled car, and is transmitted to the automated control system. After changing the direction of inclination of the layer setting up of the control system of the self-propelled car is carried out, which, depending on the combination of numbers of the received signals and the degree of loading the body, ensures actuation of actuators of the self-propelled car - movement back and forth, drive-brake, loading-unloading, stop.

EFFECT: increased efficiency and safety of the development of powerful steeply inclined layers due to organisation of the automated control system of the self-propelled car for transporting loosened coal.

3 dwg

FIELD: mining.

SUBSTANCE: method of comprehensive development of brown coal deposits comprises dividing the deposits into blocks, drilling drainage wells and underground coal gasification, dissolution of ash and slag residues of coal and pumping of productive solution to the surface for subsequent extraction of valuable components, filling the goaf of the block with the filling material. Six rows of vertical wells are drilled, located in a block with the distance of 20-25 m from one another, which are sequentially used as drainage, productive for the gasification of coal, for dissolution and extraction of ash and slag residuals of coal, and for injection of filling mixture. In each row 10-12 vertical wells are located at a distance of 15-20 m from one another. Underground water is pumped and directed through the unit of water treatment to consumer. Underground coal gasification gas is purified from impurities in the unit of energy gas purification and burned in a local gas electric station. The resultant carbon dioxide is injected in the filling mass via the storage unit and the productive solution is purified from the solid impurities and pumped through a pipeline to a chemical-technological unit connected with the filling complex by the unit of unutilised wastes.

EFFECT: effective comprehensive use of brown coal deposits and comprehensive protection of the environment from the production process impact.

1 dwg, 2 tbl

FIELD: mining.

SUBSTANCE: method comprises advance extraction of underlying protective coal beds. Beds are divided into gateways to be prepared by dual development drifts with coal pillars left there between. Gateway is extracted by longwall with top rocks fall in worked-out area. It includes recovery of one preparatory gateway behind the longwall and supporting of second preparatory gateway behind the longwall for its reuse at extraction of adjacent gateway. At extraction of adjacent beds at mine field sections complicated by disjunctive geological disturbances orientation of said disturbances in space is defined. Dual development drifts extend in foot wall of said disturbance parallel with intersection of protective bed with the surface of disturbance shifter. Boundary of gateway and preparatory drift recovered behind the longwall is located in the line of intersection between protective bad and shifter of disjunctive geological disturbance.

EFFECT: higher efficiency of protected layer degassing, lower costs, higher efficiency of second working.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes driving of layer transporting and ventilation mines along soil and ceiling of bed, in massive and in extracted space, cutting of cleaning mines in cross-section of bed at angle of 27, mechanized delivery of coal along bed mines to coal furnaces and vertical dropping of coal to furnaces. Extraction of slanted transverse bed is performed along bed diagonals having direction to horizon at angle of 27, to provide for free sliding of coal without degradation. Delivery of coal from cleaning mine placed at angle of 60 to layer mine, to back field mine is performed by self-delivery from any place of extraction field along layer mine, field coal-lowering mine and field slanting coal furnace, being at angle of 27 to horizon. Field slanted coal furnaces are placed at distance from one another along 20 m normal. Field coal mines in form of fans of three mines are connected on field slanted coal furnaces at distance of fan start from one another of 60 m with output of mines ends to each layer mine of group of three above-lying slanted-transverse layers for whole diagonal length of extraction field at distance between mines outputs along layer soil of 60 m. Ceiling of cleaning mines may be supported without load, utilizing mechanical traction on the side of ventilation furnaces for pressing moveable support tool to layer ceiling.

EFFECT: higher efficiency.

2 cl, 3 dwg

FIELD: mining industry.

SUBSTANCE: method for extraction and underground use of coal includes cleaning extraction and dumping of coal, fixing and controlling ceiling and transporting coal along face to drift. On the drift, in moveable generator, coal is pulverized for intensive burning with use of jets in water boiler firebox, where high temperature of steam is achieved (about 1400 C), enough for decomposition of water on oxygen and hydrogen. These are separated, then oxygen is fed back to jets, and hydrogen is outputted along pipes and hoses in drifts and shaft. Variants of underground generator for realization of this method are provided. Also provided is method for extraction of disturbed coal beds by short faces. It includes extraction and dumping of coal on face conveyor, fixing of ceiling behind combine, moving conveyor line and support sections in direction of cleaning face displacement, control of ceiling with destruction and partial filling. Extraction of coal is performed in short curvilinear faces by long stripes along bed, in straight drive without forwarding drifts, with preservation and reuse of ventilation and conveyor drifts, equipped with mounting manipulator robots, with fixing behind combine by automatically operating support deflectors without unloading and displacing sections in area of coal extraction. Extraction and transporting of coal is performed by fast one-drum combine and curvilinear reloading conveyor, supplying coal to drift conveyor or immediately to underground gas or energy generator placed immediately on drift. Also proposed is face scraper conveyor for realization of said method, wherein pans are made with step along front face profile, greater, than along back one, while forming common line curved towards face with constant curvature. Also proposed is a method for controlling complex for unmanned coal extraction.

EFFECT: higher efficiency, effectiveness, broader functional capabilities.

8 cl, 5 dwg

FIELD: mining industry.

SUBSTANCE: method includes determining gas potential of extracted bed in limits of extraction area and monitoring of relative gas-escape from extracted bed and of extracted coal with withdrawal of lava from mounting chamber. Value of primary step of main ceiling destruction is set on basis of distance from mounting chamber to point of minimal gas-kinetic coefficient values closest to it, as which coefficient relation of relative gas-escape to bed gas potential bed is taken. Value of destruction step is determined from mathematical relation, considering distance from mounting chamber to closest point of said coefficient minimal values. It is possible to construct a graph of dependence of gas-kinetic coefficient from distance between face and mounting chamber. Portions of extraction field, wherein periodical changes of gas-kinetic coefficient are observed, are related to areas of geological irregularities influence. On basis of decrease of amplitude of maximal oscillations of gas-kinetic coefficient displacement of face to exit of geological irregularities area is detected, and on basis of increase - entrance therein.

EFFECT: higher precision, higher speed of operation.

2 cl, 3 dwg

FIELD: mining industry.

SUBSTANCE: method includes erection of rows of main platforms along bed length in staggered order with length equal or divisible by step value for support displacement, and placing filling material thereon. Along length of main platforms between ceiling and bed soil post support is mounted, upon which filling material is fed. After that between main platforms additional platforms are erected with wedge supporting, and main platforms are rotated counter-clockwise towards pneumatic support and it is displaced for one drive step. During that filling material, while lowering, unwedges wedge support between ceiling and bed soil and forms artificial supports. After that additional platforms are rotated counter-clockwise towards pneumatic support. After movement of cleaning face for two drive steps operations for constructing artificial supports are repeated. Distance between main platforms along bed fall line are selected from mathematical expression.

EFFECT: higher efficiency.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes preparation of slanting extraction fields at whole area, driving transport drifts, driving ventilation drift for upper extraction field and use of transport drifts of extracted fields as ventilation drifts during extraction of lower extraction fields, and preparation of chamber for coal through block lower than transport drift. Transport drift and chamber are driven with straight preparation and extraction order for extraction fields, using solid system of fields extraction. Chamber is connected to transport drift by links and is driven in advance relatively to it with slant to provide for free draining of water from transport drift and chamber. Chamber width is set on basis of condition for displacement of working toll of technological extraction complex in it.

EFFECT: higher intensiveness, higher reliability.

3 dwg

FIELD: mining industry.

SUBSTANCE: method includes preparation of slanted extraction fields, driving transport drifts, driving ventilation drifts for upper extraction field and use of transport drift of upper extraction field as ventilation during preparation of lower extraction field, driving two chambers through block in parallel to transport drift. Lower chamber is driven with advance relatively to transport drift and to upper chamber and with slant, providing for free flow of water from transport drift and both chambers. Transport drift is periodically filled with breakthroughs to upper chamber, which is by breakthroughs connected to lower chamber. Width of lower chamber is set in accordance to condition of placement of working tool of technological extraction complex therein, and width of upper chamber - from condition of placement of rock therein which is product from driving of transport drift. Transport drift and both chambers are driven with straight preparation and extraction order of extraction fields, using solid system of extraction fields extraction.

EFFECT: higher intensiveness of operation.

3 dwg

FIELD: mining industry.

SUBSTANCE: method includes driving mines, drilling saturation wells along mineral resource, pressurization thereof by pressurizing means, feeding of softening reagent under pressure and saturation of mineral resource massif. Additionally saturation wells are drilled at bed ceiling, pressurized and softening reagent is pumped therein with 1-2 day exposure after forcing of reagent into mineral resource massif. Well along ceiling are placed at an angle so that distance from pressurizing means location to line of contact of ceiling to mineral resource was not less than saturation radius, and distance between wells was not less than 2-3 saturation radiuses. Between saturation wells along bed ceiling additionally drilled are wells for explosive substance charges with slant for 15-20 degrees greater, than slant of saturation wells, while the distance between saturation wells in this case is increased to 3-4 saturation radiuses. For prior processing of mineral resource by softening reagent a mine is driven in front of cleaning operations front, from which on both sides along mineral resource bed wells are drilled for feeding softening reagent therein, and after end of processing and removal of pressurizing means mine is equipped with degassing pipes.

EFFECT: higher efficiency and higher safety.

3 cl, 2 dwg

FIELD: mining industry.

SUBSTANCE: method includes drilling a system of hydraulically connected wells, directed and horizontal, cased and not cased along coal bed. Hydrodynamic and fire effect on coal bed is performed through these. Gassing and degassing processes for coal bed are performed serially via a system of hydraulically connected wells. In that case degassing process is performed by thermal treatment of channels of coal by counter-flow displacement of burning source after combustion of coal bed in one of wells. Then neutral gas is forced into system of hydraulically connected wells, ignited zone is quenched and coal methane is extracted from several wells, equipped for degassing. Gassing process is performed via repeated combustion through specially drilled vertical well and forcing flow into directed cased wells. Formed combustible gas is drained through directed non-cased wells in direction by normal lines from horizontal transverse well.

EFFECT: higher efficiency.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes separating bed on levels by driving level drifts, driving sublevel drifts, separating levels on sublevels, extraction of mineral resource in sublevels by hydraulic monitors, transporting caved-in enveloping rocks to extracted space of lower sublevels. Extraction of bed is performed without leaving of any coal blocks between extracted spaces of adjacent levels. During extraction of lower sublevel, adjacent to upper boundary of even lower level, extracted space is filled within limits of current sublevel with empty rocks, while slanting height of backfill massif is taken to be greater than 0.6 horizontal bed massiveness. Slanting height of lower sublevel is taken to be greater than slanting height of backfill massif.

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

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes driving mines in front of cleaning face, processing ceiling and mineral resource by softening agents and extraction of it by cleaning combines with additional removal of mineral resource from below the ceiling. In massif below the ceiling shafts and mines are driven at maximal distance on basis of capabilities of used drilling equipment, not allowing during drilling fro processing massif below ceiling deviation from it until contact with surface by face-adjacent ceiling, supported by cleaning combine support, and distance between following driven mines is doubled, which mines are necessary for displacement of drilling equipment and equipment for feeding softening agent into wells. After finishing its pumping these wells and mines are used through connections in shafts with removing pipeline for extracting methane and degassing mineral resources. Stack of mineral resource unprocessed by softening agent has value of no more than one-two steps of extraction of coal bands along whole length of cleaning face, and the very removal of mineral resources from massif is performed in portions along whole length of mineral resource no more than 2-3 thicknesses f cutting bands of mineral resource. Device for cutting massif includes sections of mechanized support, containing base, connected to spreader posts, extending executive tool. Combine support on the side of cave-in between back posts has wedge-shaped cutting posts, hydraulically connected to back posts. Cutting posts are provided with individual means for controlling feed and draining of hydraulic liquid. Cutting posts have devices, forming in case of their spreading vibration of hydraulic liquid sent to them.

EFFECT: higher efficiency, higher personnel safety.

2 cl, 3 dwg

Up!