CN101839134B - 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 PDF

Info

Publication number
CN101839134B
CN101839134B CN2010101611413A CN201010161141A CN101839134B CN 101839134 B CN101839134 B CN 101839134B CN 2010101611413 A CN2010101611413 A CN 2010101611413A CN 201010161141 A CN201010161141 A CN 201010161141A CN 101839134 B CN101839134 B CN 101839134B
Authority
CN
China
Prior art keywords
coal
irregular
room
mining
back production
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010101611413A
Other languages
Chinese (zh)
Other versions
CN101839134A (en
Inventor
马立强
张东升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
Original Assignee
China University of Mining and Technology CUMT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology CUMT filed Critical China University of Mining and Technology CUMT
Priority to CN2010101611413A priority Critical patent/CN101839134B/en
Publication of CN101839134A publication Critical patent/CN101839134A/en
Application granted granted Critical
Publication of CN101839134B publication Critical patent/CN101839134B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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 indifferent 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 staringfrom 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

The irregular dull pillar recovery method that a kind of room mining is left over
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, basically 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 receive 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 recovery of the irregular coal column that especially carries over to 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 over to the prior art existence.
Technical scheme: the irregular dull pillar recovery method that room mining of the present invention is left over, step is following:
Reclaim a, subregion, begins from the irregular coal column near goaf one side, and 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, preparatory 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, begin 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 accomplishing a back production unit;
G, repeat above-mentioned institute in steps, until the recovery of accomplishing 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 through 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, and mechanization degree is high, and equipment operation is flexible, and resettlement is fast, and organism of production is convenient; Stope efficient is high, and 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 done further to describe:
1,, i.e. near the bordroom and the connection roadway of goaf 5 one sides, adopts bolt support during back production like 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, and 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, begins from the coal column of leaving near goaf 5 one sides, and 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 irregular coal column 1 formation room formula air intake passage A and the return air channel B of three rows; Ventilation makes full use of original bordroom, and driving, return aircourse no longer in addition are for preventing to go here and there wind; Between bordroom, be provided with and move air curtain 4; The difficulty combustion of air curtain 4 employing activities, anlistatig plastics woven, nail hang on irregular coal column 1 and the top board, and personnel and equipment can be passed through; Fresh distinguished and admirable the entering from air intake passage A used the wind place, through return air channel B, like Fig. 1~shown in Figure 4; In the strict place of ventilating ratio with sandbag and brick construct be provided with airtight;
3, preparatory 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 feed and railless free-wheeled vehicle of continuous miner; When advancing equipment, adopt continuous miner 3 directly the irregular coal column 1 that leans on the inner side of excavation 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, the coal column from air intake passage A both sides begins, and 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 Fig. 1,2, shown in 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, and 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 to the 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 step pitches that in time move forward; 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, rise the frame supporting roof then again, 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, the back production of preparing 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, until accomplishing a back production unit, the back production of the irregular coal column 1 of two rows about promptly accomplishing;
8, repeat above-mentioned institute in steps, accomplish the back production of all irregular coal columns 1 in the bordroom.Through 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; Begin 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, preparatory 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, begin 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 carries out the back production of next left and right sides coal column, until accomplishing a back production unit;
G, repeat above-mentioned institute in steps, until the recovery of accomplishing all irregular coal columns of leaving over (1).
CN2010101611413A 2010-04-22 2010-04-22 Method for recovering irregular stagnant coal pillars left by room coal mining method Expired - Fee Related CN101839134B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101611413A CN101839134B (en) 2010-04-22 2010-04-22 Method for recovering irregular stagnant coal pillars left by room coal mining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101611413A CN101839134B (en) 2010-04-22 2010-04-22 Method for recovering irregular stagnant coal pillars left by room coal mining method

Publications (2)

Publication Number Publication Date
CN101839134A CN101839134A (en) 2010-09-22
CN101839134B true CN101839134B (en) 2012-04-04

Family

ID=42742769

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010101611413A Expired - Fee Related CN101839134B (en) 2010-04-22 2010-04-22 Method for recovering irregular stagnant coal pillars left by room coal mining method

Country Status (1)

Country Link
CN (1) CN101839134B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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
CN104564070B (en) * 2014-11-27 2016-09-14 中国煤炭科工集团太原研究院有限公司 A kind of continuous miner short-walling working face equipment selection method
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
CN111119895B (en) * 2019-12-24 2022-01-11 中国矿业大学(北京) Recovery method of metal ore residual column

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2148712C1 (en) * 1992-10-22 2000-05-10 Закрытое акционерное общество "Корпорация "Университетские сети знаний" (УНИКОР) Method for underground development of ore deposits
CN1221727C (en) * 2002-09-09 2005-10-05 神华集团有限责任公司 Continuous miner house column type short arm mechanized coal mining process and support equipment thereof
CN100497886C (en) * 2006-05-31 2009-06-10 段连权 Coal mining process including prop type mining and prop recovery
CN100554642C (en) * 2007-09-19 2009-10-28 中国矿业大学 A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining
CN101487392A (en) * 2008-01-16 2009-07-22 中国神华能源股份有限公司 House pillar type coal mining method

Also Published As

Publication number Publication date
CN101839134A (en) 2010-09-22

Similar Documents

Publication Publication Date Title
CN101725352B (en) Method for filling solid and fully mechanizing and recovering room type coal pillar
CN102619513B (en) Room and pillar type medium-length hole filling mining method using bottom ore withdrawal structures simultaneously arranged in original rock
US10012080B2 (en) Skip-mining type wangeviry stope branch roadway filling and coal mining method
CN103147761B (en) Filling mining method of gently inclined thin mineral deposit with soft roof
CN100554642C (en) A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining
CN106168131A (en) Equipment system of roadway-free coal-pillar-free self-retained roadway mining method
CN104453996B (en) A kind of packed method of mining by the way of filling of Upward slicing wall type
CN101775991B (en) Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face
CN108825237B (en) A kind of special thick coal continuous milling machine divides excavating technology with the layering combined is filled
CN103104260B (en) Under complex geological condition, comprehensive-machine is to hand-pulled noodles coal-mining method
CN108590747B (en) Wall type full-face extraction hydraulic column temporary support subsequent filling method
CN105804788A (en) Method for managing coalbed gas roadway
CN102094647A (en) Safe and efficient fully-mechanized mining method for thin coal seam under two hard conditions
CN101839134B (en) Method for recovering irregular stagnant coal pillars left by room coal mining method
CN111946345A (en) Fully-mechanized caving mining method for layering under ultra-thick hard coal
CN101858216B (en) Method for recovering stagnant coal pillars left by breast type coal mining method
CN1745226A (en) Mining system
CN106522955B (en) Dead zone waste fill cooperates with the studding recovery method of reconstruction coating with top country rock avalanche
CN105134212B (en) A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving
CN104343453A (en) Filling mining method of slowly-inclined medium-thick ore deposit
CN101737051A (en) Covering layer forming method of blind ore bodies
CN108952715B (en) Gob-side entry driving top coal supporting and reinforcing method for inclined thick/extra-thick coal seam entry top
CN104533417A (en) Dual-system two-hardness short-wall coal seam mining method
CN105370282B (en) The big high section of inclined super high seam moves towards that wall type is comprehensive to put coal-mining method
CN111764900B (en) Construction method for pushing and mining through vertical intersection point of connecting roadway on working face of 110 construction method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120404

Termination date: 20150422

EXPY Termination of patent right or utility model