CN102518472B - Mine goaf closing method - Google Patents
Mine goaf closing method Download PDFInfo
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- CN102518472B CN102518472B CN201110457981.9A CN201110457981A CN102518472B CN 102518472 B CN102518472 B CN 102518472B CN 201110457981 A CN201110457981 A CN 201110457981A CN 102518472 B CN102518472 B CN 102518472B
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- pipe
- coal ash
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Abstract
The invention provides a mine goaf closing method to enhance a seal plugging effect of a stope face. The method includes: applying fireproof sealing to a face closure site, building two seal walls 1m in thickness on the closure site, reserving a space 1m wide between the two seal walls, filling coal ash into the space, and sequentially setting a coal ash pipe, a grout pipe, an observation pipe and a water return pipe on the walls from top to bottom. The face closure site comprises three system roadway seals, three seals at the front of an airbridge, three seals at the head of a belt and two seals at an air return bypass, which are located at a goaf face peripheral system and at the front and the rear of the airbridge. Using the method effectively enhances bearing capacity of the seals, prevents the fractured or cracked seals from forming leak passages, greatly reduces occurrence of internal fires of the goaf, prevents harmful gases in the goaf from leaking, and guarantees safety production of a mine.
Description
Technical field
The present invention relates to Safety of Coal Mine Production field, concrete a kind of mine goaf closing method.
Background technology
In coal production, " two lane two lines " of stope (air intake lane, return airway, open-off cut, stop adopting line) has a large amount of float coal to pile up, and the most easily spontaneous combustion occurs.Special in the back production later stage, drawing speed is slack-off, and reach 3 ~ 5 months from stopping adopting removal of home end period, heterogeneous goaf band rests on the same area for a long time, easier regenerative oxidation, and goaf ignition probability increases.
Work plane enclosed point is before and after work plane peripheral system and air crossing, and what generally all adopt is forever airtight, and because permanent airtight body of wall thinner (1m), bearing capacity are limited, by often being collapsed by pressure, pressure break, very easily forms the passage that leaks out.Smear not in time if repaiied, goaf very easily spontaneous combustion cause gas leak.
Adopt rear work plane pressure-bearing coal column and generally only stay 10 ~ 15m, owing to stopping adopting line near panel coal column, adopted rear concentrated stress effect, isolated coal pillar rib is crisp by pressure break, pressure, and integrality is deteriorated, and forms the passage that leaks out, more exacerbates the ignition hidden danger of " two lane two lines ".
Summary of the invention
In order to strengthen the sealed blockage effect on stope, provide a kind of mine goaf closing method.
To achieve these goals, the technical solution used in the present invention is: a kind of mine goaf closing method, adopt fire prevention airtight in work plane enclosed point, described fire prevention is airtight is build the thick fire dam of twice 1m by laying bricks or stones in enclosed point, the space of 1m is left in the middle of twice fire dam, powder filler coal ash in space, body of wall sets gradually fine coal ash pipe, grout pipe, sighting tube from top to bottom and pipe of turning one's coat.The present invention is on airtight construction technology, airtight middle filling loess of being prevented fires in past changes filling powder coal ash into, due to flyash has dilatancy can well backfilled enclosed and two cracks helped, and can well top be connect, thus the appearance of airtight air leakage phenomena can be prevented to greatest extent.
Work plane enclosed point before and after goaf work plane peripheral system and air crossing, comprise that three, system lane is airtight, first three is airtight for air crossing, leather belt head three is airtight and return air detours two airtight.The present invention is airtight for preventing fires by the permanent airtight reconstruction before and after peripheral system, air crossing during past close the goaf, airtightly become multilayer from individual layer, thickness becomes 3 meters from 1 meter, enhances airtight bearing capacity, change over and airtightly often to be collapsed by pressure, the situation of pressure break.
The present invention (1) is airtight for preventing fires by the permanent airtight reconstruction before and after peripheral system, air crossing during past close the goaf from closing process; (2) on airtight construction technology, the structure that fire prevention is airtight is changed.Airtight bearing capacity can be effectively strengthened by the improvement of above two aspects, prevent from airtightly being collapsed rear formation to leak out passage by pressure break, pressure, greatly reduce the occurrence probability of goaf breeding fire and stop goaf pernicious gas to leak, ensureing the safety in production of mine.
Accompanying drawing explanation
Fig. 1 is the airtight construction structure schematic diagram of fire prevention of the present invention.
Fig. 2 is goaf of the present invention work plane enclosed point schematic diagram.
In figure, 1-16 and A, B, C are detent position, 21-fire dam, 22-flyash, 23-fine coal ash pipe, 24-grout pipe, 25-sighting tube, and 26-turns one's coat pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
A kind of mine goaf closing method of the present invention, as shown in Figure 1, work plane enclosed point adopts fire prevention airtight, described fire prevention is airtight is build the thick fire dam of twice 1m 21 by laying bricks or stones in enclosed point, the space of 1m is left in the middle of twice fire dam 21, powder filler coal ash 22 in space, body of wall sets gradually fine coal ash pipe 23, grout pipe 24, sighting tube 25 and pipe 26 of turning one's coat from top to bottom.
As shown in Figure 2, goaf work plane enclosed point, comprise two airtight (15,16) that three, system lane airtight (6,8,9), air crossing first three airtight (11,13,14), leather belt head three airtight (A, B, C) and return air detour, concentrate on before and after work plane peripheral system and air crossing.
Ore deposit, the Datong Coal Group Company coal exit of valley is example, and the economic benefit that the present invention originally brings is described.(1) past brings adverse effect owing to often needing to repair to other production work, and the fire prevention of the constructing airtight repairerment cycle (closes for 307 return airways: after being enclosed within filling powder coal ash in 2008 for 1 year to 2 years, do not occur that overvoltage is collapsed up to now, pressure break phenomenon), decrease repairerment recruitment, effectively save work efficiency, the repairerment recruitment of saving can have been used in other work.(2) former airtight average monthly just needs repairs once, and often repair and once about need 2 works, repair expenses is about about 600 yuan, 1 year repair expenses about 7200 yuan/.After innovation, flyash charging quantity presses 10m
3/ seat calculates, and filling expense about needs 6000 yuan/, and every airtight saves 1200 yuan.My ore deposit expose at present airtight have about 280 and increase, the present invention promotes rear annual airtight repair expenses can save about 330,000 yuan.
Claims (1)
1. a mine goaf closing method, it is characterized in that: adopt fire prevention airtight in work plane enclosed point, described fire prevention is airtight is build the thick fire dam of twice 1m (21) by laying bricks or stones in enclosed point, the space of 1m is left in the middle of twice fire dam (21), powder filler coal ash (22) in space, body of wall sets gradually fine coal ash pipe (23) from top to bottom, grout pipe (24), sighting tube (25) and pipe (26) of turning one's coat, described goaf work plane enclosed point comprises three airtight (6, system lane, 8, 9), air crossing first three airtight (11, 13, 14), leather belt head three airtight (A, B, and return air two airtight (15 of detouring C), 16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457981.9A CN102518472B (en) | 2011-12-31 | 2011-12-31 | Mine goaf closing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457981.9A CN102518472B (en) | 2011-12-31 | 2011-12-31 | Mine goaf closing method |
Publications (2)
| Publication Number | Publication Date |
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| CN102518472A CN102518472A (en) | 2012-06-27 |
| CN102518472B true CN102518472B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110457981.9A Active CN102518472B (en) | 2011-12-31 | 2011-12-31 | Mine goaf closing method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726874B (en) * | 2013-12-30 | 2016-06-08 | 王昆 | A kind of airtight body of wall method for blocking of underground coal mine |
| CN103726875A (en) * | 2014-01-16 | 2014-04-16 | 华北科技学院 | Method for remote filling of explosion-proof compression-resistant closing of coal mine |
| CN103939125A (en) * | 2014-04-29 | 2014-07-23 | 中国矿业大学(北京) | Gob hot air treatment method |
| CN105317461A (en) * | 2015-03-27 | 2016-02-10 | 中国矿业大学 | Construction method of short-distance coal seam connecting cross drift sealing wall |
| CN105507950B (en) * | 2015-12-17 | 2018-02-23 | 大同煤矿集团有限责任公司 | Arch cushion wall water-proof sealing structure |
| CN107620605A (en) * | 2017-08-10 | 2018-01-23 | 长春黄金研究院 | A kind of underground mine goaf large area air-leakage control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343167A (en) * | 2007-07-10 | 2009-01-14 | 中国矿业大学(北京) | Backfilled enclosed material and its use method |
| CN201546758U (en) * | 2009-10-27 | 2010-08-11 | 淄博矿业集团有限责任公司岱庄煤矿 | Rapid fire-proof seal door for coal mines |
| CN201763394U (en) * | 2010-08-17 | 2011-03-16 | 阜新矿业(集团)有限责任公司 | Mining roadway fast-sealing curtain |
| CN102121369A (en) * | 2010-12-15 | 2011-07-13 | 中国神华能源股份有限公司 | Method for separating gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201232572Y (en) * | 2008-07-14 | 2009-05-06 | 义马煤业(集团)有限责任公司 | Coal mine tunnel goaf fire wall |
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2011
- 2011-12-31 CN CN201110457981.9A patent/CN102518472B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343167A (en) * | 2007-07-10 | 2009-01-14 | 中国矿业大学(北京) | Backfilled enclosed material and its use method |
| CN201546758U (en) * | 2009-10-27 | 2010-08-11 | 淄博矿业集团有限责任公司岱庄煤矿 | Rapid fire-proof seal door for coal mines |
| CN201763394U (en) * | 2010-08-17 | 2011-03-16 | 阜新矿业(集团)有限责任公司 | Mining roadway fast-sealing curtain |
| CN102121369A (en) * | 2010-12-15 | 2011-07-13 | 中国神华能源股份有限公司 | Method for separating gas |
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| CN102518472A (en) | 2012-06-27 |
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