CN103953345B - A kind of small section entry retaining along gob side exploitation method - Google Patents

A kind of small section entry retaining along gob side exploitation method Download PDF

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Publication number
CN103953345B
CN103953345B CN201410201917.8A CN201410201917A CN103953345B CN 103953345 B CN103953345 B CN 103953345B CN 201410201917 A CN201410201917 A CN 201410201917A CN 103953345 B CN103953345 B CN 103953345B
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China
Prior art keywords
curtate
lane
small
tunnel
work plane
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CN201410201917.8A
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Chinese (zh)
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CN103953345A (en
Inventor
金志远
马立强
于斌
张炜
王飞
杜勋
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中国矿业大学
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Publication of CN103953345A publication Critical patent/CN103953345A/en
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Abstract

A kind of small section entry retaining along gob side exploitation method disclosed by the invention, when upper curtate working face extraction, by top tight filling wall in Liu She lane, forms small section tunnel along goaf; During lower curtate working face extraction, then lane is expanded to small section tunnel.The method stays the small section tunnel established, and easily safeguards the integrality that also can ensure top board; Realize easily gathering without light section can be utilized while coal pillar mining to stay lane ventilation to solve upper curtate face upper corner angle gas the difficult problem transfinited, improve the safety of coal resources recovery ratio and stoping operation.

Description

A kind of small section entry retaining along gob side exploitation method
Technical field
The present invention relates to a kind of small section entry retaining along gob side exploitation method, be particularly useful for the coal-face that underground coal mine longwall face, roof condition are relatively poor.
Background technology
In modern underground coal mine exploitation, mostly adopt comprehensive mechanization longwall system, generally leave the protection coal pillar of 20 ~ 30m between two Adjacent Working Faces, when reclaiming coal column according to present production technique, the rate of recovery is extremely low, causes a large amount of Coal Loss.In order to increase coal recovery rate, improve the economic benefit of mine, many mines all adopt the form of gob side entry retaining or gob side entry driving to implement without coal pillar mining, namely in coal mining process, do not stay protection pillar and safeguard the production technique in tunnel by other modes.
Existing often limited to geological conditions compliance without coal pillar mining technology, execution conditions and construction technical requirement are all higher, if even supporting failure is reprocessed in the unreasonable tunnel of will bringing of design and construction link in a large number.Current comparatively advanced person mainly contains following three without coal pillar mining technology:
1. wide is tunneled once Cheng Shuan lane without pillar mining method (as shown in Figure 3).Wide is tunneled once Cheng Shuan lane and first will dig 1 wide opening without pillar mining method, then constructs filling wall and tunnel is isolated into return airway and gas Zhuan Pai lane, without coal pillar mining between lane; During working face extraction, filling wall serves as roadside support and is retained in gas lane, and later stage gas Zhuan Pai lane rib brushing, the transportation roadway as next section realizes section without coal pillar mining.This method thoroughly reforms the traditional handicraft that Liao Dan lane is tunneled respectively, constructs filling wall when tunnelling, retains gas Zhuan Pai lane; Filling wall is constructed when tunneling, and constructs the impact of roadside support operation on normal back production when avoiding back production.But the filling wall that the method is constructed needs to stay to establish connection roadway, connection roadway place adopts spoil or coal pack to pile up and closes, later stage sprayed mortar sealing, operation is comparatively loaded down with trivial details, and top board exposed area is comparatively large simultaneously, and open-assembly time is longer, maintenance cost is higher, and its application limits by roof condition very much.
2. in lane preset packwall without pillar mining method, as shown in Figure 4.In lane, preset packwall is in the transportation roadway in upper curtate stope front without pillar mining method, near the lane side rib of next section, a preset gangue concrete entry-in packing band, during lower curtate return airway driving, tunnel along preset packwall, realize high seam work plane without coal pillar mining, the method overcomes the drawback stayed between traditional section and establish supporting roadway with narrow coal pillar or Tunnelling Along Goaf, at rear, goaf, working security is higher, construction organization is simpler, improve coal recovery rate, shortcoming needs again to excavate lower curtate return aircourse, the wall of filling is simultaneously subject to a mining influence more.
3. without coal column half original position gob-side entry retaining method, as shown in Figure 5.Adopt half original position to build filled wall by laying bricks or stones without coal column half original position gob-side entry retaining method Shi Liu lane work plane, before adopting, in back production lateral wall portion, tunnel certain distance A place in isolation side, body of wall edge, and opposite side is in goaf.The method makes filled wall side be arranged in original tunnel, is easy to connect top, easily reduces ore deposit pressure and manifests degree, but does not carry out the operation of expansions lane due to the method, causes and stays lane section reduction, cause certain difficulty to underground ventilating and transport.
Summary of the invention
Technical problem: the object of the invention is for current without pillar mining method Problems existing, a kind of small section entry retaining along gob side exploitation method is provided, by staying small section tunnel between coal-face, solve the current difficulty reducing that without coal column coal mining Zhong Liu lane section underground ventilating and transport are caused, thus realize safety and high efficiency.
Technical scheme: small section entry retaining along gob side exploitation method of the present invention, in transportation roadway after upper curtate working face extraction, top tight filling wall in lane is constructed along goaf side, in lane, the rib of top tight filling wall distance lower curtate stope stays and establishes width L, filling wall is constructed piecemeal with the propelling of upper curtate work plane, formed along empty small section tunnel along goaf at work plane rear between filling wall and lower curtate stope side rib, after completing the back production of upper curtate work plane, lane is expanded again along small section tunnel, tunnel out the return airway of lower curtate stope, technology is exploited lower curtate work plane routinely afterwards.
The width L of described formation small section tunnel is 0.5 ~ 1.0m.
Beneficial effect: the present invention establishes small section tunnel by staying, easily safeguard the integrality of cross dimensions and guarantee top board, gob side entry retaining time relatively poor to roof condition is very favourable, and the scope of application is wider; While realization is without coal pillar mining, stays lane to ventilate by light section, solves the methane accumulation overrun issues of face upper corner angle preferably, improve operating environment, improve coal resources recovery ratio; Filling wall does not need to stay to establish connection roadway, avoids lower curtate working face extraction when body of wall stays lane near rib simultaneously and, to the destruction of body of wall, less by a mining influence, thus accelerates speed of application, reduce and stay lane cost, ensure integrality and the seal of body of wall.The method is simple to operate, with low cost, safe and efficient.
Accompanying drawing explanation
Fig. 1 is small section entry retaining along gob side exploitation method of the present invention schematic diagram in early stage.
Fig. 2 is small section entry retaining along gob side exploitation method later stage schematic diagram of the present invention.
Fig. 3 is that wide of prior art driving once becomes duplicate rows without pillar mining method schematic diagram.
Fig. 4 be in prior art lane preset packwall without pillar mining method schematic diagram.
Fig. 5 is that prior art is without coal column half original position gob-side entry retaining method schematic diagram.
In figure: 1-upper curtate transportation roadway, 2-upper curtate work plane, 3-goaf, top tight filling wall in 4-lane, 5-lower curtate stope, 6-small section tunnel, 7-lower curtate return airway.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1 and Figure 2, small section entry retaining along gob side exploitation method of the present invention, when arranging upper curtate work plane, adopts anchor pole (rope) supporting by upper curtate headentry; Inner by the upper curtate transportation roadway of anchor pole (rope) supporting at upper curtate work plane rear, namely in the transportation roadway 1 after upper curtate work plane 2 back production, construct top tight filling wall 4 in lane along side, goaf 3, when carrying out filling, guarantee that in lane, top tight filling wall 4 and tunnel roof and floor join tight; In lane, top tight filling wall 4 stays apart from the rib of lower curtate stope 5 and establishes width L, filling wall 4 is constructed piecemeal with the propelling of upper curtate work plane 2, formed along empty small section tunnel 6 between top tight filling wall 4 and lower curtate stope 5 side rib in lane, until complete the back production of upper curtate work plane along goaf 3 at work plane rear; After wall to be filled has been constructed, check strength of wall body and sealing, take measures to carry out reinforcing and sealing; The width L of described formation small section tunnel 6 is 0.5 ~ 1.0m.After completing the back production of upper curtate work plane 2, then expand lane along lower curtate working face wall to the small section tunnel 6 reserved, tunnel out the return airway 7 of lower curtate work plane, prior art is exploited lower curtate stope 5 routinely afterwards.

Claims (2)

1. a small section entry retaining along gob side exploitation method, it is characterized in that: when arranging upper curtate work plane (2), upper curtate transportation roadway (1) is adopted anchor pole (rope) supporting, in upper curtate transportation roadway (1) after upper curtate work plane (2) back production, top tight filling wall (4) in lane is constructed along goaf (3) side, when carrying out filling, guarantee that in lane, top tight filling wall (4) and tunnel roof and floor join tight; In lane, the rib of top tight filling wall (4) distance lower curtate stope (5) stays and establishes width L, in lane, top tight filling wall (4) is constructed piecemeal with the propelling of upper curtate work plane (2), at work plane rear along formed between goaf (3) and lower curtate stope (5) side rib width be L along empty small section tunnel (6), until complete the back production of upper curtate work plane, check strength of wall body and sealing, take measures to carry out reinforcing and sealing; After completing the back production of upper curtate work plane (2), then expand lane along lower curtate working face wall to the small section tunnel reserved (6), tunnel out the return airway (7) of lower curtate work plane, technology is exploited lower curtate stope (5) routinely afterwards.
2., according to the small section entry retaining along gob side exploitation method that right 1 requires, it is characterized in that: described width L is 0.5 ~ 1.0m.
CN201410201917.8A 2014-05-13 2014-05-13 A kind of small section entry retaining along gob side exploitation method CN103953345B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108049869A (en) * 2017-12-08 2018-05-18 中国矿业大学 The coal-mining method that long short face is alternately arranged
CN108457652B (en) * 2018-02-09 2019-09-13 中国煤炭科工集团太原研究院有限公司 A kind of blockette segmentation full blast pressure shortwall even adopts placement method
CN111335895A (en) * 2020-04-21 2020-06-26 天地科技股份有限公司 Anti-impact method for wide narrow excavation of rock burst coal seam exploitation roadway
CN111287749A (en) * 2020-04-21 2020-06-16 天地科技股份有限公司 Anti-impact method for wide excavation and narrow excavation of rock burst coal seam near-empty roadway
CN111335896A (en) * 2020-04-21 2020-06-26 天地科技股份有限公司 Coal-pillar-free anti-impact method for wide narrow excavation of rock burst coal seam mining roadway

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