CN102996134B - Roadway advancing method for realizing grouting consolidation and reserving small coal pillars - Google Patents

Roadway advancing method for realizing grouting consolidation and reserving small coal pillars Download PDF

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Publication number
CN102996134B
CN102996134B CN201210480623.4A CN201210480623A CN102996134B CN 102996134 B CN102996134 B CN 102996134B CN 201210480623 A CN201210480623 A CN 201210480623A CN 102996134 B CN102996134 B CN 102996134B
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China
Prior art keywords
parts
goaf
grouting
haulage way
grouting pipe
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CN201210480623.4A
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Chinese (zh)
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CN102996134A (en
Inventor
张贵银
于克梁
魏建振
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山东科技大学
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Priority to CN201210480623.4A priority Critical patent/CN102996134B/en
Publication of CN102996134A publication Critical patent/CN102996134A/en
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Publication of CN102996134B publication Critical patent/CN102996134B/en

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Abstract

The invention discloses a roadway advancing method for realizing grouting consolidation and reserving small coal pillars. The method comprises the following steps of: after extraction of a working face, firstly laying a grouting pipe in a haulage way, then filling the haulage way by using refuse, next grouting through the grouting pipe, and forming a consolidating body by the grouting body and the refuse to plug gas at a goaf. According to the method, harmful gases such as high-concentration gas at an upper section can be effectively plugged, the concentration of the harmful gases such as the gas in the mining working face is reduced, the thickness of the coal pillars at the section between an upper section haulage way and a lower section tailgate is greatly reduced, the recovery ratio of coal is improved, and safe production is guaranteed.

Description

A kind of grouting reinforcement the pick lane method of pre-future small coal pillar
Technical field
The present invention relates to a kind of grouting reinforcement and the pick lane method of pre-future small coal pillar.
Background technology
Move towards long than under the condition all across the method exploitation gentle dip medium-thickness seam that falls in employing, as long as adopt the degree of depth (as about 100m) deeply reaching certain, can be there are 3 representative parts in the destruction of overlying strata and movement, be called from bottom to top across band, slit band and the curved bel of falling.Be positioned at the foot of overlying strata across the band that falls, be close to coal seam, after sky is adopted in coal seam, overlying rock disequilibrium, is caving, and upwards develops gradually by immediate roof rock stratum, is full of until space, goaf is caving sillar.
Between the sillar of filling in goaf, space is many, connective strong, the place being gas overflowing He gathering.In highly gassy mine, driving face and lower curtate stope are often subject to the harm of upper curtate goaf gas, affect mining progress.The solution of current routine stays the large coal column of establishing 15 ~ 20m thick and adds the gas that Wind Volume overflows to dispel goaf, but there is the defects such as the low and ventilation expense of coal mining rate is high.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of grouting reinforcement and the pick lane method of pre-future small coal pillar.
Its technical solution is:
A kind of grouting reinforcement the pick lane method of pre-future small coal pillar, it comprises the following steps: after working face extraction, first in haulage way, lay Grouting Pipe, then spoil is adopted to be filled up by haulage way, again by Grouting Pipe slip casting, injecting cement paste and spoil form induration, with the methane gas in shutoff goaf.
Preferably, before laying Grouting Pipe, first on the top board of haulage way, post is got ready, to safeguard slip casting job safety.
Preferably, be also equipped with Grouting Pipe in goaf, after the spoil formed by immediate roof inbreak when goaf fills up, top, goaf is the base object model of bending subsidence, base object model bottom spoil compacting, then by Grouting Pipe to slip casting in goaf.
Preferably, between haulage way and lower curtate tailgate, stay the fender establishing 2 ~ 5m thick.
Preferably, described slurries are composed of the following components by weight ratio: cement 1 ~ 15 part, 5 ~ 20 parts, sand, 10 ~ 30 parts, water, quicklime 8 ~ 10 parts, 10 ~ 12 parts, gypsum, 2 ~ 8 parts, curing compound, accelerating admixture 5 ~ 10 parts, additive 5 ~ 10 parts, and described additive is composed of the following components by weight ratio: sodium carboxymethylcellulose 1 ~ 2 part, sodium lignin sulfonate 5 ~ 10 parts, water reducing agent 10 ~ 20 parts, the strong agent 10 ~ 30 parts of drought.
Advantageous Effects of the present invention is:
The present invention takes filling waste rock in the haulage way that upper curtate is discarded, at haulage way and goaf grouting, choose reasonable pulping raw material simultaneously, the each weight of accurate control, and stay between upper curtate haulage way and lower curtate tailgate and establish fender, by the comprehensive synergy of above technological means, thus play the effect of the pernicious gases such as effective shutoff upper curtate high concentration gas, reduce the harmful gas concentration such as gas in getting working face, and drastically reduce the area the thickness of section coal pillar between upper curtate haulage way and lower curtate tailgate, improve the recovery ratio of coal, ensure that safety in production.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described:
Fig. 1 is principle schematic of the present invention.
In figure: 1-base object model, 2-immediate roof, 3-lateral stress distribution curve, 4-upper curtate haulage way, 5-lower curtate tailgate, 6-fender, 7-coal seam, 8-goaf.
Detailed description of the invention
By reference to the accompanying drawings, a kind of grouting reinforcement the pick lane method of pre-future small coal pillar, it comprises the following steps: after working face extraction, immediate roof 2 above upper curtate haulage way 4 gets post ready, to safeguard slip casting job safety, then in upper curtate haulage way 4, Grouting Pipe is laid, and adopt spoil to be filled up by haulage way 4, again by Grouting Pipe slip casting, injecting cement paste and spoil form induration, with the methane gas in shutoff goaf 8, prevent the accumulation of the methane gas in goaf 8 from leaking and enter lower curtate, jeopardize safety in production.
As to further improvement of the present invention, also Grouting Pipe is equipped with in goaf 8, after the spoil formed by immediate roof inbreak when goaf 8 fills up, top, goaf 8 is the base object model 1 of bending subsidence, base object model 1 is bottom spoil compacting, then by Grouting Pipe to slip casting in goaf, injecting cement paste and spoil form induration.In goaf, slip casting can methane gas further in shutoff goaf, more effectively prevents methane gas from entering lower curtate, and goaf can be suppressed to leave over spontaneous combustion of coal.
The mode that above-mentioned Grouting Pipe adopts layering in a row to lay in haulage way or goaf, enables injecting cement paste be distributed in haulage way or goaf.
After adopting grouting reinforcement, stay between haulage way and lower curtate tailgate that to establish the thickness of fender to be reduced to 2 ~ 5m thick, fender can be made like this to play the effect of methane gas in shutoff goaf, what fender can be made again to stay establish is little as far as possible, avoid coal resources waste, improve coal mining rate.
Further improve as to of the present invention, described slurries are composed of the following components by weight ratio: cement 1 ~ 15 part, 5 ~ 20 parts, sand, 10 ~ 30 parts, water, quicklime 8 ~ 10 parts, 10 ~ 12 parts, gypsum, 2 ~ 8 parts, curing compound, accelerating admixture 5 ~ 10 parts, additive 5 ~ 10 parts, and described additive is composed of the following components by weight ratio: sodium carboxymethylcellulose 1 ~ 2 part, sodium lignin sulfonate 5 ~ 10 parts, water reducing agent 10 ~ 20 parts, the strong agent 10 ~ 30 parts of drought.The more common slurries of the slurries adopting above component to make obviously can strengthen the consolidation power with spoil, shorten consolidation time, and then play the effect of methane gas in quick effectively shutoff goaf.
The part do not addressed in aforesaid way is taked or uses for reference prior art to realize.
It should be noted that, under the instruction of this manual, any equivalents done by those skilled in the art, or obvious variant, all should within protection scope of the present invention.

Claims (4)

1. a grouting reinforcement the pick lane method of pre-future small coal pillar, it is characterized in that comprising the following steps: after working face extraction, first in haulage way, lay Grouting Pipe, then spoil is adopted to be filled up by haulage way, again by Grouting Pipe slip casting, injecting cement paste and spoil form induration, with the methane gas in shutoff goaf;
To inject slurries composed of the following components by weight ratio: cement 1 ~ 15 part, husky 5 ~ 20 parts, 10 ~ 30 parts, water, quicklime 8 ~ 10 parts, 10 ~ 12 parts, gypsum, 2 ~ 8 parts, curing compound, accelerating admixture 5 ~ 10 parts, additive 5 ~ 10 parts, described additive is composed of the following components by weight ratio: sodium carboxymethylcellulose 1 ~ 2 part, sodium lignin sulfonate 5 ~ 10 parts, water reducing agent 10 ~ 20 parts, the strong agent 10 ~ 30 parts of drought.
2. a kind of grouting reinforcement according to claim 1 the pick lane method of pre-future small coal pillar, is characterized in that: before laying Grouting Pipe, first on the top board of haulage way, get post ready.
3. a kind of grouting reinforcement according to claim 1 the pick lane method of pre-future small coal pillar, it is characterized in that: be also equipped with Grouting Pipe in goaf, after the spoil formed by immediate roof inbreak when goaf fills up, top, goaf is the base object model of bending subsidence, base object model bottom spoil compacting, then by Grouting Pipe to slip casting in goaf.
4. a kind of grouting reinforcement according to the arbitrary claim of claims 1 to 3 the pick lane method of pre-future small coal pillar, is characterized in that: between haulage way and lower curtate tailgate, stay the fender establishing 2 ~ 5m thick.
CN201210480623.4A 2012-11-22 2012-11-22 Roadway advancing method for realizing grouting consolidation and reserving small coal pillars CN102996134B (en)

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CN102996134B true CN102996134B (en) 2015-04-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105888683B (en) * 2016-06-28 2018-01-02 安徽理工大学 A kind of caved gangue method for cleaning based on slurry injection technique

Citations (5)

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Publication number Priority date Publication date Assignee Title
RU2246618C1 (en) * 2003-12-08 2005-02-20 Государственное образовательное учреждение высшего профессионального образования Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет) Method for controlling hard-destructible ceiling
CN1936271A (en) * 2006-08-21 2007-03-28 山东盛泉矿业有限公司 Method for filling coal-steam-free extraction working surface goaf by coal mine waste rock
CN1963149A (en) * 2006-11-17 2007-05-16 中国矿业大学 Mining method for replacement of banded coal under building by waste rock
CN101725352A (en) * 2009-12-04 2010-06-09 中国矿业大学 Method for filling solid and fully mechanizing and recovering room type coal pillar
CN102146794A (en) * 2011-03-04 2011-08-10 河南理工大学 Grouting, consolidating and gob-side tunneling process method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2246618C1 (en) * 2003-12-08 2005-02-20 Государственное образовательное учреждение высшего профессионального образования Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет) Method for controlling hard-destructible ceiling
CN1936271A (en) * 2006-08-21 2007-03-28 山东盛泉矿业有限公司 Method for filling coal-steam-free extraction working surface goaf by coal mine waste rock
CN1963149A (en) * 2006-11-17 2007-05-16 中国矿业大学 Mining method for replacement of banded coal under building by waste rock
CN101725352A (en) * 2009-12-04 2010-06-09 中国矿业大学 Method for filling solid and fully mechanizing and recovering room type coal pillar
CN102146794A (en) * 2011-03-04 2011-08-10 河南理工大学 Grouting, consolidating and gob-side tunneling process method

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