Method for combined development of gently pitching coal beds

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in development of coal bed, including with non-standard conditions of coal beds, as well as at final stage of open mining and already used mine fields. Method of combined development includes following stages. Stage of development of coal beds with capacity of up to 5 m, on which open mining operations manufacturing involves preparation of coal bed and platform. On aligned platform, installing a system for open underground development, using said system for open and underground mining in an ascending path performing coal extraction with extraction chambers with width of 4 m and height of 4.5 m, length of up to 300 m, wherein inclination angle of chambers corresponds to seam dip angle and can vary in a range from 0 to 25° to horizontal line. Between extraction chambers on horizontal component a barrier pillar is left with width of 5 m. And a stage of development of coal beds with capacity of more than 5 m or formations above 5-metre mark from base of platform, on which over said extraction chambers are drilled wells with diameter of 200-250 mm, length of up to 300 m.

EFFECT: invention increases completeness of coal production.

1 cl, 4 dwg

 



 

Same patents:

FIELD: mining.

SUBSTANCE: method for hydromechanical benefication involves drilling of production wells, water-jet destruction of a mineral deposit in extraction chambers of the deposit with its changer over to a movable state as a part of a hydraulic mixture, hydraulic lifting via the well to day surface from extraction chambers of the hydraulic mixture in the form of pulp, hydraulic transportation of pulp to a benefication place, and gravitational benefication of the mineral deposit in water medium. Destruction of the deposit is performed during formation of an extraction chamber with a vertical symmetry axis in the form of a rotation figure: cylinder, cone or ball, thus creating a circular flow of coal hydraulic mixture, which is swirled about the vertical symmetry axis, and depositing foreign heavy inclusions and sand at the bottom of the extraction chamber in the created hydraulic cyclone. Suction of coal hydraulic mixture is performed from the level above deposit level; turbulent hydraulic transportation of pulp from the extraction chamber to the place of its preparation for benefication is performed via pipelines. Hydromechanical treatment of pulp is performed so that a brown coal suspension is performed. Target products are obtained in the form of a concentrate of humic acids and a concentrate of bitumens by tangential supply of the flow of the brown coal suspension to a conical sedimentation basin, filling of the sedimentation basin with further settlement of the brown coal suspension and staged pumping-out of highly disperse fractions that are settled subsequently with their supply to different accumulation tanks for collection of target products and benefication tailings. The processing line implementing this method consists of three sections - borehole hydraulic mining, hydraulic transportation and benefication - subsequently dispersing brown coal till fineness.

EFFECT: implementation of staged production of target products.

4 cl, 2 dwg

FIELD: mining.

SUBSTANCE: development method comprises opening-up of developed field reserves, ditch driving along the whole length of the production block, water flooding of the production block for disintegration of clay sand and their subsequent improvement by the production complex with installation of pressure of head hydraulic transportation and concentration plant. Before grooving of slits by cross-cut and longitudinal passes of slit-cutting unit, and also water flooding of the production block for disintegration of clay sand and their subsequent improvement, using experimental and analytical methods the bending compression and tension characteristics of high clayey sands in various locations of placer deposits are determined. The dynamics of change of elastic characteristics in these sections is determined, the correlation of response curve of resiliency of sand at water saturation of separate sections of the field with the relative wave resistance of sand in these sections is studied, and grooving of cracks at the distance from each other depending on the change of response curve of sand resiliency of at water saturation is performed.

EFFECT: achievement of high level of disintegration of clay sands difficult for wash-out, minimising of process losses of valuable component and decrease of mining expenses.

3 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used at mining operations. Proposed method comprises drilling the row of test wells to fit downhole hydromining units therein and to washout minerals therefrom by fluid jets forced by said units for pulp to be delivered to surface. Drilled pipes are inclined in the plane perpendicular to spread of said row. Wells are drilled in a row to distance equal to double efficient length of washout jet while rows are spaced apart through distance equal to efficient length of washout jet. Washout is performed from wells towards hanging layer to form the face with hemispherical cross-section perpendicular to well axis.

EFFECT: reliable egress of minerals, washout at dried face.

3 cl, 9 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic process of coal production. Main and auxiliary openings are driven via tandem and/or single faces that delineate blocks, barrier and safety pillars. Water is forced into faces by pump stations after cleaning at drainage complexes, mechanised settlers and/or water headers. The latter are located in intercommunicated chambers located at lower points of hydraulic site blocks and exiting into accumulation openings via which hydraulic transport is performed and rock is discharged. Abandoned pillars are liquidated after working of extraction pillar at backstroke in tow-side or single-side cuts. Water is cleaned at mechanised settlers and/or water headers with application of combination of water cleaning technical means and processes. For this, used are, for example, water impermeable partitions with water bypass nearby bottom, thin-layer clarifiers, flotation, coagulation, water processing by constant pulsating current, etc.

EFFECT: working of coal at complex mining and geological conditions, lower costs.

4 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic borehole mining of minerals. Proposed method comprises opening of the deposit via central and peripheral wells, placing the equipment therein and opening of adjacent chambers in layers, from bottom to top, starting from peripheral chambers. Prior to opening of the next layer through the entire bed thickness, undercut chamber is formed nearby soil of formed chamber and, parallel with said layer, of artificial ceiling of hardening material with inclination to centre. Shrinkage of fallen rock and filling of opened space with hardening material, opening and backfilling of central chamber at development of every chamber. After making of said artificial ceiling, several hydraulic cuts are made over the height of temporary wells. After formation of undercut space, rocks are hydraulically fractured from lower hydraulic cuts to force fluid into fracture unless rock failure into undercut space. Caved rock is partially flooded by hydraulic fracture fluid and giants to wash out the rock. As rock disintegrates, pulp is fed to the surface. As magazine level drops below design mark, hydraulic fracturing is repeated from hydraulic cut closest to stripped area, shrinkage, wash-out and discharge of pulp. Then, said jobs are repeated unless stripped area reaches aforesaid artificial ceiling. Now, shrunk rock is completely washed put, pulp is discharged and stripped area is filled.

EFFECT: selective extraction, decreased losses of minerals and costs, lower environmental effects.

8 cl, 5 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises exposure of producing formation by production well equipped with jetting equipment and jetting of minerals. Nearby soil of developed strata horizontal drain hole is drilled for preliminary drying of working zone and creating conditions for operation of jetting in air. Note here that minerals are broken by jetting, gravity and increasing rock pressure resulted from underground water level decrease. This allows mining the minerals at strength of 3-5 MPa. Light grade well is drilled in vertical plane with drain well inclined to mouth to allow outflow of hydraulic mix by gravity and accumulated in settler. Operation of wells of hydromining complex is performed in turns. First, drain well is activated. After water level drop below giant jet nozzle, giant jet is activated. Minerals are mined by intervals in direction from bottom to mouth of operation well and with withdrawal of casing tubes.

EFFECT: higher efficiency of hydromining.

1 dwg

FIELD: mining.

SUBSTANCE: device comprises a machine with a hydraulic drive of reciprocal and return-rotary displacement, a two-channel tubular frame, a jet working element, a system to supply and distribute discharge liquid. The working element is equipped with the main and auxiliary jet-forming shafts with attachments and separated channels of discharge liquid supply to them. The main shaft is installed at the angle of 90°, and auxiliary shafts - at the angles of accordingly 45° and 3-10° to the longitudinal axis of the working element. Supply of the discharge liquid to channels is adjusted to a two-position distributor installed on the shaft of the hydraulic drive of return-rotary displacement.

EFFECT: simplified design, increased reliability of design, increased safety and efficiency of labour.

4 cl, 3 dwg

FIELD: mining.

SUBSTANCE: first preparatory field mines are driven - level haulage and ventilation drifts with identical geodetic elevations, block crossdrifts and accumulating drifts with an inclination for a self-flow transport, stripping wells are drilled at the right angle to the bed plane, then, line cuts are washed by the hydraulic method. Level haulage and ventilation drifts stretch at identical geodetic elevations to form a ventilation scheme with horizontal depression. The area of line cuts is increased to initiate the process of caving of a hanging massif in a stope. The stope bottom is formed by washing of line cuts with an inclination providing for accumulation of caved coal through self-flow. The caved coal is magazined to control shift of side rocks in the stope. Chambers that are adjacent to the mined space are separated by barrier sight pillars. Oversize material is crushed, and coal mass is periodically discharged in dosing manner into the accumulating drift to provide for stope bottom movement up the pitch.

EFFECT: elimination of air leaks through a mined space, reduced contamination of coal by caved rocks, higher reliability of breaking face functioning and labour safety.

2 dwg

FIELD: mining.

SUBSTANCE: system capable of using naturally reheated fluids produced from hydrothermal channels with the purpose to develop and use practically unlimited quantity of thermal energy contained in specified fluids. The system comprises the main system made of three parts: a funnel, pipe sections and any combination of several mechanical fixtures. The extracted thermal energy is used to drive steam turbines or other equipment for generation of power, which is transported to earth surface, water desalination or for any other production, requiring thermal energy. Besides, the specified thermal energy may simultaneously or separately be introduced into the extracting plant for extraction of resources in order to extract precious metals, mineral and chemical substances without system modification.

EFFECT: provision of a reliable mechanism for extraction of thermal energy from an ocean bottom and such precious resources as minerals, metals and chemical substances.

37 cl, 5 dwg

FIELD: mining.

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

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 operations.

SUBSTANCE: invention relates to mining operations, in particular to open-underground development of thick steeply inclined coal seams with horizontal layers using the mobile means of mechanisation applied in underground mining. The method comprises the construction of a horizontal working site away from the exit of the coal seam, mounting on it of the mechanisation means, carrying out opening inclined working to the level of the underlying layer and construction of the layer chamber in a layer with mobile mechanisation means, coal extraction with these mechanisation means away from the working site through horizontal excavation chambers on both sides of the layer chamber, the deepening of the opening inclined working leaving the proportioned interchamber pillars between the layers, and the supply of chipped coal on the excavation chambers and the opening inclined working to the temporary warehouse, formed on the working site. At that the working site is constructed on the day surface, the output of the seam is taken as the output of the seam under the sediments, the projection of the axis of the opening inclined working is oriented on the plan at an acute angle (γ) to the line of the seam extension, depending on the angle of its occurrence (α) and permissible angle (β) of the longitudinal tilt of the used means of mechanisation, determined from the mathematical relationship, and the mouth of the opening inclined working is located at a distance from the seam, measured along the line of the horizon, equal to 3 to 5 lengths of the greatest of the used mobile mechanisation means.

EFFECT: increasing the efficiency of the development of a thick single powerful steeply inclined coal seam.

1 dwg

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