How to develop powerful steep coal seam horizontal layers

 

(57) Abstract:

The method is intended for use in mining the extraction of coal and other minerals from the mined-out space. Excavation field work horizontal layers in ascending order. When this layer work in the lower part of the extraction field on the border with conveyor drift. Layers are removed tunneling combine with the Executive of the electoral actions, the roof layer is formed into the shape of the arch. In the middle part of the reservoir evenly along the length of the extraction field drilling of wells and grow their pipe. Through these holes provide ventilation layer during its excavation and filing hydrobalance after excavation. Transport the broken coal is carried out on telescopic runners and plasmacam built between wells. The technical result - increase of efficiency of development of a powerful steep coal seams. 2 C.p. f-crystals, 10 ill.

The present invention relates to mining and is intended for developing powerful steep coal seams horizontal layers in ascending order with the mined-out space.

The known method Razrabotka body of electoral actions and hydrosolate goaf layer [1].

However, this method can be applied to develop a very thick layers, because involves the excavation of layer two bands, and is not very effective since it provides for the creation and maintenance of each layer adjacent production, and this increases the complexity of operations and requires increased material consumption.

Also known how to develop powerful steep coal seams, including the notch horizontal tunneling layer combine with the Executive of the electoral action, drilling in the uprising in the middle part of the reservoir and gravity transport of extracted coal prespectrum wells [2].

The disadvantages of this method are:

the necessity of dividing the layer into two strips;

- the use of expensive hardening bookmarks.

These shortcomings dramatically reduce the effectiveness of the design of powerful steep coal seams in this way.

Known machinery methods of preparatory workings, including the breaking of rock mass of the harvester attachment for the generation, exchange and transport operations, delivery of materials, installation of drainage grooves and auxiliary operations [3].

The disadvantage of this is izlagaemogo invention is to improve development efficiency, powerful steep coal seams due to the use of cheaper hydrobalance and overlapping in time of certain operations of the technological cycle.

The technical result is achieved by the fact that in the known method of conducting layer generation harvester as podvigina last in the upper part of working are drilling a shallow hole in the side of the breed in pairs, one in the roof, the other in the soil reservoir, directing them to the horizontal axis, perpendicularly axis of the driven working in each hole insert one end of the beam, the other end of which is fastened with the same end of the beam is inserted into the opposite hole under the bonded ends of the beams set support.

The technical result is also achieved by the fact that in the known method the development of powerful steep coal seam layers work in ascending order, roof layer is formed into the shape of the arch, the first layer being involved at the lower part of the extraction field on the border with the conveyor roadway, in its developed area soil layer construct drains, and in the intervals between wells - uhlenbusch, well grow pipe whose length is equal to the slant height of the layer, it shall airing layer during the extraction of coal and feed hydrobalance after excavation layer, as excavation layer pipe wells disassemble and they increase the tensile and low shear, and transport of extracted coal to Glasunov carry on telescopic runners.

Exactly the inventive method of conducting layer formulation ensures the feasibility of the proposed method of development allows us to use the support of preparatory development as a support when the notch of the first layer of coal, due to dramatically reduce the loss of minerals in the pillars, and hence the probability of spontaneous combustion of coal. This allows us to conclude that the claimed method of developing a powerful steep coal seam and method of making the layer generation connected to form a single inventive concept.

In Fig. 1 shows a diagram of dissection and preparation of the extraction field; Fig. 2 - section of the extraction field transverse to the extension of the reservoir of Fig. 3 - circuit testing of the first layer, and Fig. 4 is a diagram of the construction of the scaffolding of Fig. 5 is a diagram of the undercut side of the rocks; Fig. 6 - position of the harvester on the scaffolding in front of the pivot of Fig. 7 - position in the layer before applying hydrobalance; Fig. 8 - circuit testing of the layer, leaving the rear sight of Fig. 9 - scheme of development (current position), and Fig. 10 is a cross-section of the conveyor drift.

The method can be implemented as follows. Powerful is oodinium vent 3 and the conveyor 4 drifts, who shot down two rays 5 and 6, dividing thus the mining field into three zones: zone 7 - notches and two mounting-shunting zones 8 and 9. With conveyor drift 4 the full height of the extraction field at an equal distance from each other in the middle part of the reservoir drilling of wells 10, which grow pipe 11, the length of which is equal to the slant height of a horizontal layer.

The first layer is removed, for example, the tunneling machine 12 of the type PU, in the lower part of the extraction field adjacent to the conveyor passage 4. As excavation layer between wells 10 build opesuse 13. The broken coal telescopic chutes 14 and plasmacam 13 is fed to the conveyor passage 4 and the conveyor 15 is transported outside of the extraction field. Roof layer is formed into the shape of the arch for a more complete fill out space by hydrosoluble. Maintaining a goaf carry out the anchor 16 PetroChina evenly along the entire length of the layer. This uses the anchor with high resistance to tensile and low - cut, for example, a polymer.

Upon completion of the excavation of the first layer in the area of the notches 7 of its developed space is rweyemamu the roadway, fill the filter material, delaying filling material, but well permeable, thereby constructing drain 17. The soil layer is isolated from the conveyor drift 4 airtight material 18, for example, segments of a waste vent sleeve. All plasmacam 13 attach one section of the pipe 11 to be removed from the borehole 10. Excavation zone isolate jumpers (not shown) in the district of rays 5 and 6, and then served backfill material in wells 10. Through the drain 17 water goes into the passage 4 and further along the drainage groove in the sump, and the solid fraction of the bookmark remains in the developed space layer, filling it to its full capacity.

At the same time in the Assembly and shunting zone 9 are working to turn the harvester 12 and transfer it to the next (second) layer. When this is removed the first layer as described above, but upon reaching the border of the extraction field, the harvester 12 reverse pass back to the ramp 6, before it is mounted platforms. To do this, the roof and the soil reservoir level PetroChina are drilling shallow wells 19 and is inserted into one end of the beam 20, the opposite ends of which are fastened by bolts. Under the beams of a set of rigid metal support 21. The ZAT is from coal and forming goaf next layer. Moving the harvester 12 on the platform back and forth on the scaffolding construct the deck 23. After the arrival of the combine 12 of covering his 23 Executive body destroy the side of the rocks on either side of its body with the necessary moving forward, creating space for a turn. Then deploy the harvester 12 180oand disconnected from the power supply system. After erection of necessary bridges and dismantling in 22 in zone 9 serves hydrosolate, filling the space zones 9 to the level of the deck 23.

After gathering water and waste combine with scaffolding extracted beams 20 and support 21 for reuse.

The next layer is removed as described, but now the harvester additionally destroys the polymer anchor 16 installed while testing the previous layer. While the ventilation layer provide a fresh supply of air jet from a Stingray 5 or 6 - stope layer - wells 10 - vent drift 3.

After testing the second layer in the zone 7 harvester 12 pass in zone 8, in which the first layer is not fulfilled yet. Here the work of excavation is organized as follows. With the passage 4 between 10 wells drilled hole 24 to a height of just balut opesuse 13. As podvigina combine sections of the wells 10, those below the second layer, fill the filter material, building drains 25 and leave the pillar 26.

Through the use of cheaper bookmarks dramatically reduced the cost of coal production from the powerful steep formation; through the use of Glasunov and gutters reduced costs mangat-removal of the vehicle within a layer.

The conducting layer of the drift may be carried out as follows. As podvigina harvester carry out the drilling of shallow wells 27 pairs in the roof and the ground layer in the upper part of the developing, directing them to the horizontal axis perpendicular to the axis of the driven working. In each hole insert one end of the beam 28, for example, of the I-beam, the other end of which is fastened with the same end of the beam is inserted into the borehole on the contrary, for example, by means of plates 29 and bolted joints. Under each pair of bonded beams install the metal support 30. Adjacent pairs of beams, if necessary, connect the marks. The roof framing wooden pull tightening 31.

It is expected that this support will be much more stable and have a C is OK more frequent installation and banners roof framing wooden tightening possible to develop the first layer of the described method development without leaving pillar layer over the roadway.

Thus, the use of method development and method of conducting layer production will reduce the cost of extracting coal from thick, steep coal seam, i.e., to increase production efficiency.

Sources of information taken into account in the preparation of the application:

1. USSR author's certificate N 981608, 1982.

2. USSR author's certificate N 920214, 1982.

3. Gelasco M. , USAN-Podgornov B. M., Kushnaryov A. A. Handbook of drifter. - M.: Nedra, 1979, S. 195.

1. How to develop powerful steep coal seam horizontal layers, including the opening of the reservoir ventilation and transport crosscuts, the preparation of the mining field conducting ventilation and conveyor drifts and the linkage of their rays, drilling in the middle part of the reservoir at an equal distance from each other along the entire length of the extraction field, mechanized excavation of the coal layer, the transport of extracted coal to Glasunov and gravity transport them, the maintenance of developed space, Breakfast is not a layer shape of the arch, the first layer work in the lower part of the extraction field, in its developed area soil layer suit drains, and in the intervals between wells - uhlenbusch, well grow pipe whose length is equal to the slant height of the layer, it shall airing layer during the extraction of coal and feed hydrobalance after excavation layer, as excavation layer pipe wells is removed and they are increasing uhlenbusch, maintaining goaf layer provide anchors with high resistance to tensile and small to cut and transport the broken coal to Glasunov carry on telescopic runners.

2. The method according to p. 1, characterized in that between the first layer and the conveyor roadway leave the rear sight, the height of which is equal to the power layer, the hole in the rear sight is filled with a filtering material, forming drains, uhlenbusch suit in wells drilled in the rear sight on the uprising of the reservoir between drains.

3. The method according to p. 1, characterized in that the ventilation and conveyor drifts in the upper part of working are drilling a shallow hole in the side of the breed in pairs, one in the roof, the other in the soil reservoir, directing them to horizones which fasten with the same end of the beam, inserted into the opposite hole, and install vertical support in the middle part of working in alignment with each pair of wells, the excavation roof wooden pull tightening.

 

Same patents:

The invention relates to the mining industry and can be used to protect the reservoir excavations in the zone of influence of the treatment works from the reference pressure, which occurs when the seam with a complete collapse of the roof rocks in the developed space

The invention relates to mining, in particular to methods of mining of bedded deposits on the development system long poles along strike

The invention relates to the field of mining, particularly underground coal mines

The invention relates to the mining industry

The invention relates to the field proud of the case, namely to the extraction of pillars of coal left about a group of celestial workings for their maintenance during operation

The invention relates to the mining industry and can be used when developing in underground conditions sloping coal seams for reuse when beztselikovuju method of coal extraction

The invention relates to the mining industry and can be used in the development of contiguous coal seams

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!