CN101839134A - Method for recovering irregular stagnant coal pillars left by room coal mining method - Google Patents
Method for recovering irregular stagnant coal pillars left by room coal mining method Download PDFInfo
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- CN101839134A CN101839134A CN 201010161141 CN201010161141A CN101839134A CN 101839134 A CN101839134 A CN 101839134A CN 201010161141 CN201010161141 CN 201010161141 CN 201010161141 A CN201010161141 A CN 201010161141A CN 101839134 A CN101839134 A CN 101839134A
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Abstract
The invention relates to a method for recovering irregular stagnant coal pillars left by a room coal mining method. A track walking type hydraulic bracket is bridged in a mining room, a crown sheet above the mining room is supported by both the irregular coal pillar and the hydraulic bracket, and the crown sheet is managed by a complete crown sheet caving method. The coal pillars are recovered in different areas, every three rows of coal pillars are taken as one arrangement unit, and air curtains are arranged between coal pillars to form air inlet channels and air return channels; and staring from two rows of regular coal pillars at the side of a goaf, every two rows of regular coal pillars are taken as one mining unit, and a continuous miner, a crab claw type coal charging machine, a track walking type hydraulic bracket and a trackless glue-wheel vehicle are adopted to carry out irregular coal pillar recovery so as to realize the recovery of irregular stagnant coal pillars left by the room coal mining method and increase the recovery rate of coal resources. The invention has the advantages of simple system, less investment in equipment, flexible process, high degree of mechanization, flexible equipment operation, fast movement, convenient organization of production, high efficiency of mining working face and relatively stronger production capacity.
Description
Technical field
The present invention relates to the irregular dull pillar recovery method that a kind of room mining is left over, be particularly useful for that stable roof, mine pressure are less, seam inclination below 10 °, base plate is more smooth, ature of coal hard and steady, top board do not have trickle and are difficult for the present low gas shallow buried coal seam of spontaneous fire.
Background technology
The essence of barrier system coal-mining method is the bordroom of a series of wide 5～8m of being of digging in the coal seam, links to each other with connection roadway between bordroom, forms to be similar to strip or block irregular coal column, and irregular coal pillar width does not wait by several meters to more than 20 meters.Coal mining is carried out in bordroom.Irregular coal column can stay according to condition and not adopt, or after bordroom has been adopted, again with the extraction as far as possible on request of irregular coal column.Stay the mode that irregular coal column do not adopt and be called room mining, the method for not only having mined the room but also having adopted irregular coal column is called post and stall.
A lot of coal production bases, area, the Inner Mongol utilize the room mining system more, and irregular coal column is not adopted in the room of only mining.Utilize irregular coal column roof supporting, bordroom does not adopt any artificial supporting.About 66～7,000,000,000 t coal resources are abandoned in the down-hole, form dull coal amount.Dull coal amount is easy to spontaneous combustion in the process of down-hole long oxidation, and causes environment pollution, causes significant wastage for simultaneously the national precious resource.A few years ago because Coal Economy is depressed, if reclaim irregular coal column, then to buy support and other equipment comes supporting roof, this has just strengthened cost, even unable to make ends meet.Therefore, a lot of coal production bases utilize the room mining system more, and irregular coal column is not adopted in the room of only mining, and resource recovery only accounts for 36%～40%, forms a large amount of dull coal amounts.Therefore the recovery of irregular coal column is present urgent problem.
The irregular Pillar Recovery technology of room and pillar mining system relates to the complication system engineering of numerous related disciplines such as mine pressure and CONTROL OF STRATA MOVEMENT, coal-mining method, ventilation, transportation.Under the cooperation of continuous miner, hydraulic support and complete bolt support equipment, the local success that obtains regular irregular Pillar Recovery, but in irregular Pillar Recovery process, substantially all adopt single section way of recycling.Promptly before irregular Pillar Recovery the exploiting field is divided into some sections, recovery is to have adopted the irregular coal column that the bordroom of a section then reclaims this section earlier in proper order.Will lay down the mine pressure of this section like this, adopt adjacent section again, what be subjected to like this that the effect of exploiting field section mine pressure will be little is many.And for the engineering practice research of the irregular Pillar Recovery of full open type (back production intact whole bordrooms reclaim irregular coal column again) seldom, the especially recovery of the irregular coal column that carries at room mining, in this respect practice and theoretical research are few.
Summary of the invention
Technical problem: the objective of the invention is problem, the irregular dull pillar recovery method that provides a kind of room mining that improves coal recovery rate to leave at the prior art existence.
Technical scheme: the irregular dull pillar recovery method that room mining of the present invention is left over, step is as follows:
Reclaim a, subregion, and from the irregular coal column near goaf one side, the irregular coal column of three rows is an arrangement unit, between the irregular coal column of three rows air curtain is set, and makes the irregular coal column of three rows form room formula air intake passage and return air channel;
B, pre-limit of mining inside ceiling panel bare area is surpassed about 20m
2The zone, adopt anchor pole or anchor cable to add strong supporting;
C, from the irregular coal column of air intake passage both sides, the irregular coal column of per two rows is a back production unit, carries out back production successively, carries out back production by top to the main haulage roadway direction in each back production unit;
D, the exploitation original position of two irregular coal columns is laid hysteresis supporting caterpillar track travelling hydraulic support and continuous miner about formula air intake passage top, the room of back production unit, and wait the to mine side of post, two 2～3 at irregular coal column rear portions is provided with a plurality of advance support caterpillar track travelling hydraulic supports about top;
E, with continuous miner to top about two irregular coal columns alternately implement the feed of double-vane inclined cutout, Bian Caibian retreats, continuous miner to about after two coal columns have respectively advanced a cutter, the hysteresis supporting caterpillar track travelling hydraulic support at its rear portion in time step pitch of reach carries out supporting;
F, reclaimed top about behind two irregular coal columns, with the reach of advance support caterpillar track travelling hydraulic support, caterpillar track travelling hydraulic support and continuous miner move forward thereupon, repeating step e, carry out the back production of next left and right sides coal column, until finishing a back production unit;
G, repeat above-mentioned institute in steps, until the recovery of finishing all irregular coal columns of leaving over.
Beneficial effect: the present invention utilizes caterpillar track travelling hydraulic support and irregular coal column roof supporting.Under caterpillar track travelling hydraulic support supported, continuous miner carried out left and right sides drawing back to two irregular coal columns in bordroom, the limit of mining inside ceiling panel is within the limit span, and is safer reliable to irregular Pillar Recovery.Adopt the caterpillar track travelling hydraulic support advance support and be aided with and adopt the support pattern that the back walking prop combines immediately following supporting, comparatively favourable to Roof Control, in conjunction with the bolt support before adopting, guaranteed the safety of excavation, be the key that realizes safety in production.There is good adaptive capacity in coal seam for the ature of coal hard and steady, be particularly useful for that mine pressure is little, roof and floor is stable and be difficult for spontaneous fire the present low gas coal seam.Can when highly effective and safe is produced, realize the recovery of dull coal resources, improve the rate of recovery of coal resources.Carry out irregular Pillar Recovery by continuous miner, crab claw type slicer-loader, caterpillar track travelling hydraulic support and railless free-wheeled vehicle, its method is simple, and equipment investment is few, and technology is flexible, the mechanization degree height, and equipment operation is flexible, and resettlement is fast, and organism of production is convenient; Stope efficient height, production capacity is higher relatively.
Description of drawings
Fig. 1 is irregular dull irregular pillar recovery method enforcing location figure of the present invention;
Fig. 2 is an irregular dull irregular pillar recovery method initial implementation drawing of site of the present invention;
Fig. 3 is the enforcing location figure behind irregular dull irregular pillar recovery method cut one cutter of the present invention;
Fig. 4 is the enforcing location figure after two coal columns in irregular dull irregular pillar recovery method top of the present invention return.
Among the figure: the irregular coal column of 1-; 2-hysteresis supporting caterpillar track travelling hydraulic support; The 3-continuous miner; The 4-air curtain; The 5-goaf; 6-advance support caterpillar track travelling hydraulic support; 7-feed order; The residual irregular coal column of 8-.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
1,, i.e. near the bordroom and the connection roadway of goaf 5 one sides, adopts bolt support during back production as main winning bord left part among Fig. 1 at first to part bordroom and connection roadway; The anchor pole specification is Φ 18 * 2000mm, and the anchor pole specification is Φ 18 * 2000mm, and support density (array pitch) is not less than and is 1200mm * 1200mm, and every row's anchor pole number is adjusted according to the developed width of bordroom and connection roadway; Intersection to local bare area big (length or width are greater than 8m), adopt anchor cable to add strong supporting, anchor cable is the high strength steel strand of 7 gangs of Φ 5mm, pallet adopts the processing of 12# channel-section steel, length 250mm, backing plate is the 8mm steel plate, specification 50 * 50mm, and array pitch is 2500mm * 2500mm between anchor cable; Anchor cable is with three resin anchoring agent anchorings (a CK2335 powder stick is preceding, and two middling speed K2350 powder sticks are in the back), and anchor cable anchors into roof and stablizes the rock stratum and be no less than 2000mm;
2, reclaim the subregion, and from the coal column of leaving near goaf 5 one sides, the irregular coal column 1 of three rows is an arrangement unit, between three row's coal columns 1 air curtain 4 is set, and makes the irregular coal column 1 of three rows form room formula air intake passage A and return air channel B; Ventilation makes full use of original bordroom, and driving, return aircourse no longer in addition are for preventing to go here and there wind, mobile air curtain 4 is set between bordroom, the difficulty combustion of air curtain 4 employing activities, anlistatig plastics weaving cloth, nail hangs on irregular coal column 1 and the top board, and personnel and equipment can be passed through; Fresh distinguished and admirable entering from air intake passage A used the wind place, by return air channel B, as Fig. 1～shown in Figure 4; In the strict place of ventilating ratio with sandbag and brick construct be provided with airtight;
3, pre-limit of mining inside ceiling panel bare area is surpassed about 20m
2The zone, adopt anchor pole or anchor cable to add strong supporting, when irregular when leaving over coal column 1 and hindering the turnover of the feed of continuous miner and railless free-wheeled vehicle, when advancing equipment, adopt continuous miner 3 directly the irregular coal column 5 by a side of excavation inside to be carried out local back production, satisfy the width requirement of bordroom access device until it.New exposed top board after in time adopting anchor pole to firm extraction carries out supporting, and the anchor pole specification is Φ 16 * 1800mm, and an array pitch is (800～1000) mm * (800～1000) mm;
4, from the coal column of air intake passage A both sides, per two row's coal columns are a back production unit, carry out back production successively, carry out back production by top line by line to main haulage roadway C direction in each back production unit;
5, the exploitation original position of two coal columns is laid three hysteresis supporting caterpillar track travelling hydraulic supports 2 and continuous miner 3 about formula air intake passage A top, the room of back production unit, and wait the to mine side of post, two 2～3 at coal column rear portions is provided with 6,5 advance support caterpillar track travelling hydraulic supports 6 of 5 advance support caterpillar track travelling hydraulic supports and is mainly used in advance support and hysteresis supporting about top.Advance support rack is in order to protect the integrality of irregular coal column 1 and bordroom top board, and simultaneously also for constructing the return channel of a safety, but the safety of support personnel and equipment is returned and removed in case of necessity; Three hysteresis supporting caterpillar track travelling hydraulic supports 2 are in order to protect the integrality of excavation top board, to guarantee continuous miner 3 mining devices such as grade and stoping operation personnel's safety.
6, continuous miner 3 cooperates with hysteresis supporting caterpillar track travelling hydraulic support 2, adopt feed not stay coal skin double-vane retrusive recovery method, two irregular coal columns 1 about top are implemented the feeds of double-vane inclined cutout, feed order 7 by shown in Fig. 1,2,3 1., 2., 3., 4., 5., 6. hocket about the position; Continuous miner 3 is earlier from right flank back production feed, about alternately 45～60 ° of feeds of cutting sth. askew, reclaim the bordroom left and right sides and leave over irregular coal column 1; The depth of cut of cutting sth. askew is for being no more than 13m, Bian Caibian retreats, in three hysteresis supporting caterpillar track travelling hydraulic supports 2, wherein ratio two hysteresis a little in addition, the irregular coal column of continuous miner 3 bevels is to residual irregular coal column 8, promptly to about after two irregular coal columns 1 have respectively advanced a cutter, three hysteresis supporting caterpillar track travelling hydraulic supports 2 at its rear portion are step pitch of reach in time, the unsettled top board at immediate support continuous miner 3 rears, goaf 5 side stands are pushed ahead the approximately quite distance of its cut width, again rise the frame supporting roof then, after the irregular coal column 1 in the left and right sides, top has all been adopted, 5 advance support caterpillar track travelling hydraulic supports 6 are in time moved forward, to hand over the beginning back production position that 3 hysteresis supporting caterpillar track travelling hydraulic supports 2 is moved on to next irregular coal column simultaneously, prepare the back production of next irregular coal column, as shown in Figure 4.
7, repeating step 6, carry out the back production of next left and right sides coal column, the back production of the irregular coal column 1 of two rows about finishing a back production unit, promptly finishing;
8, repeat above-mentioned institute in steps, finish the back production of all irregular coal columns 1 in the bordroom.By continuous miner 3 coal breakages, the raw coal the crab claw type slicer-loader is adopted continuous miner 3 under circulates and packs in the light-duty railless free-wheeled vehicle in the exploitation process, and railless free-wheeled vehicle transports raw coal.
Claims (1)
1. irregular dull pillar recovery method that room mining is left over is characterized in that:
Reclaim a, subregion, from the coal column of leaving near goaf (5) one sides, the three irregular coal columns of row (1) are an arrangement unit, between the three irregular coal columns of row (1) air curtain (4) are set, and make the three irregular coal columns of row (1) form room formula air intake passage (A) and return air channel (B);
B, pre-limit of mining inside ceiling panel bare area is surpassed about 20m
2The zone, adopt anchor pole or anchor cable to add strong supporting;
C, from the coal column of air intake passage (A) both sides, per two irregular coal columns of row (1) are a back production unit, carry out back production successively, carry out back production by top to main haulage roadway (C) direction in each back production unit;
D, the exploitation original position of two coal columns is laid hysteresis supporting caterpillar track travelling hydraulic support (2) and continuous miner (3) about top, the room of back production unit formula air intake passage (A), and wait the to mine side of post, 2～3 at two irregular coal columns (1) rear portion is provided with a plurality of advance support caterpillar track travelling hydraulic supports (6) about top;
E, two irregular coal columns about top are alternately implemented the feed of double-vane inclined cutout with continuous miner (3), Bian Caibian retreats, continuous miner (3) to about after two irregular coal columns (1) have respectively advanced a cutter, the hysteresis supporting caterpillar track travelling hydraulic support (2) at its rear portion step pitch that in time moves forward is carried out supporting;
F, reclaimed top about behind two irregular coal columns (1), advance support caterpillar track travelling hydraulic support (6) is moved forward, hysteresis supporting caterpillar track travelling hydraulic support (2) and continuous miner (3) move forward thereupon, repeating step e, carry out the back production of next left and right sides coal column, until finishing a back production unit;
G, repeat above-mentioned institute in steps, until the recovery of finishing all irregular coal columns of leaving over (1).
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| CN2010101611413A CN101839134B (en) | 2010-04-22 | 2010-04-22 | Method for recovering irregular stagnant coal pillars left by room coal mining method |
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| CN2010101611413A CN101839134B (en) | 2010-04-22 | 2010-04-22 | Method for recovering irregular stagnant coal pillars left by room coal mining method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967492A (en) * | 2014-04-14 | 2014-08-06 | 山西晋城无烟煤矿业集团有限责任公司 | Corner coal pillar recycling method in right triangle area |
| CN104564070A (en) * | 2014-11-27 | 2015-04-29 | 中国煤炭科工集团太原研究院有限公司 | Method for type selection of short-wall mining working face equipment of continuous miner |
| CN108868769A (en) * | 2018-06-07 | 2018-11-23 | 兖州煤业股份有限公司 | A kind of construction method for reinforcing coal column based on swollen locking-type anchor cable |
| CN111119895A (en) * | 2019-12-24 | 2020-05-08 | 中国矿业大学(北京) | Recovery method of metal ore residual column |
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2010
- 2010-04-22 CN CN2010101611413A patent/CN101839134B/en not_active Expired - Fee Related
Patent Citations (5)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967492A (en) * | 2014-04-14 | 2014-08-06 | 山西晋城无烟煤矿业集团有限责任公司 | Corner coal pillar recycling method in right triangle area |
| CN104564070A (en) * | 2014-11-27 | 2015-04-29 | 中国煤炭科工集团太原研究院有限公司 | Method for type selection of short-wall mining working face equipment of continuous miner |
| CN108868769A (en) * | 2018-06-07 | 2018-11-23 | 兖州煤业股份有限公司 | A kind of construction method for reinforcing coal column based on swollen locking-type anchor cable |
| CN111119895A (en) * | 2019-12-24 | 2020-05-08 | 中国矿业大学(北京) | Recovery method of metal ore residual column |
| CN111119895B (en) * | 2019-12-24 | 2022-01-11 | 中国矿业大学(北京) | Recovery method of metal ore residual column |
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