CN102207004A - Method for carrying out gas control on coal faces - Google Patents
Method for carrying out gas control on coal faces Download PDFInfo
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- CN102207004A CN102207004A CN2010101418149A CN201010141814A CN102207004A CN 102207004 A CN102207004 A CN 102207004A CN 2010101418149 A CN2010101418149 A CN 2010101418149A CN 201010141814 A CN201010141814 A CN 201010141814A CN 102207004 A CN102207004 A CN 102207004A
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Abstract
The invention discloses a method for carrying out gas control on coal faces, which comprises the following steps of: during the period of carrying out primary mining on a coal face, hanging a windbreak so as to guide wind to a worked-out section; extracting the gas in the worked-out section by using a drill hole or a tunnel; and scattering flame-retardant anti-static foams to the worked-out section so as to reduce the gas burden of the worked-out section. In the embodiment of the invention, through guiding the wind and diluting the gas in the worked-out section by using the windbreak, extracting the gas in the worked-out section by using the drill hole or the tunnel and scattering the flame-retardant anti-static foams to the worked-out section so as to reduce the free space of the worked-out section, the gas on the coal face can be controlled effectively, and the safety of mining is improved.
Description
Technical field
The present invention relates to the Safety of Coal Mine Production technical field, particularly a kind of method of coal-face gas control.
Background technology
At present in coal mining activity, the coal-face gas accident belongs to accident very serious in the disaster of colliery, gas has very big reserves in the colliery, be the hazards in the coal production, in order to prevent gas accident, normally adopt the mode that mine is ventilated, gas is discharged outside the mine, reduce the concentration of gas with dilution.
During first the adopting of coal-face, because the goaf top plate inbreak is untimely, the space, goaf is big, and wind speed is low, easily causes methane accumulation.Solve the high concentration gas that accumulates in the goaf and become one of emphasis that ensures the back production of coal-face safety.
When the content of the gas that gathers of coal-face was higher, only depending on ventilates discharged gas, and great difficulty is arranged technically, if it is untimely to ventilate, when gas density is high to a certain degree the time, was prone to very much gas accident, caused casualties and property loss.
Summary of the invention
The invention provides a kind of method of coal-face gas control,, guarantee that the safety of coal work is carried out to realize reducing the gas density of coal-face.
The embodiment of the invention provides a kind of method of coal-face gas control, and described method comprises:
During first the adopting of coal-face, hang air partition to the goaf wind-guiding;
Adopt the gas in boring or extraction goaf, tunnel;
Diffuse foam to the goaf, to reduce the gas burden in goaf.
The described air partition of hanging during first the adopting of coal-face comprises to the goaf wind-guiding:
During first the adopting of coal-face, hang air partition to the goaf wind-guiding from the coal work basifacial portion of making progress, that hangs air partition is spaced apart 20 meters to 30 meters.
The gas in described employing boring or extraction goaf, tunnel comprises:
Adopt the gas in low level boring or low level tunnel or extraction goaf, tail tunnel.
Described method also comprises: when adopting low level hole pumping and mining gas, boring is tightly sealed; When adopting low level tunnel or tail tunnel mash gas extraction, the tunnel is tightly sealed.
Described method also comprises: when mash gas extraction, the concentration of the gas of self-measuring device monitoring extraction is installed on the extraction pipeline, to set the ability of mash gas extraction according to the concentration of the gas of extraction, when the concentration of the gas of extraction increases, the ability of then corresponding increase mash gas extraction, when the gas density of extraction reduces, the then corresponding ability that reduces mash gas extraction.
Described method also comprises: when the concentration of the gas that detects extraction increased to default threshold values, then the upper corner to coal work adopted the mode of leakage stopping to control the gas leakage, and increases the gas pumping ability.
Described foam is for easily producing the flame-retardant and anti-static foam that just dissipated at least 48 hours.
The sharp air partition wind-guiding dilution of embodiment of the invention goaf gas, and the gas in boring of employing low level or extraction goaf, low level tunnel, and diffuse the flame-retardant and anti-static foam to the goaf, reduce the free space in goaf, make the gas of coal-face can access effective improvement thus, improved the safety of coal work.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The method flow diagram of the coal-face gas control that Fig. 1 a provides for one embodiment of the invention;
The scene schematic diagram of the coal-face gas control that Fig. 1 b provides for one embodiment of the invention.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope of protection of the invention.
The method flow diagram of the coal-face gas control that Fig. 1 a provides for one embodiment of the invention, present embodiment is hung air partition by the goaf at coal-face, to the goaf wind-guiding with the dilution gas density.Adopt the gas in low level boring, low level tunnel or tail tunnel timely extraction goaf, and diffuse the flame-retardant and anti-static foam to the goaf, reduce gas memory space in the free space of goaf, to effective improvement of gas, method comprised during realization was just adopted coal-face:
The scene schematic diagram of the coal-face gas control that provides for present embodiment referring to 1b, coal-face is a plane longitudinally, and its underpart corner portions located is called corner down, and upper corner partly is called upper corner.During first the adopting of coal-face, directly push up before the not inbreak, along with increasing of coal mining output, its inner space is also increasing, and meeting this moment accumulated methane after interior void arrives certain volume, just need be evacuated gas timely.
In general, the gas main source that coal-face produces comprises two parts, when a part is coal-face ordinary production coal breakage, and the relatively large gas of can gushing out; Another one is the gas that assemble in the goaf, the gas that assemble in the goaf comprises the gas of fissure zone on the roof collapse band, settles in an area and meet in the top layer goaf when emitting, and gas emission will increase greatly, owing to leak out very little even do not have distinguished and admirablely in the goaf, gas just can gather herein.
For evacuating gas, during first the adopting of coal-face, begin to hang air partition to top from the work plane bottom, that hangs air partition is spaced apart 20 meters to 30 meters one.Hanging air partition at coal-face is to hang air curtain or reed mat etc. to stop distinguished and admirable on work plane pillar or support, change the distinguished and admirable route of work plane, to increase air feed, the gas in dilution goaf to the goaf, thereby can in time take away the gas of work plane, reduce the gas density in goaf.
The gas in step 12, employing boring or extraction goaf, tunnel.
When carrying out the extraction of gas, can adopt the mode mash gas extraction of boring at work plane, also can adopt the mode mash gas extraction in gas pumping tunnel.Generally be the gas that adopts low level boring or extraction goaf, low level tunnel.
In order to guarantee the effect of extraction goaf gas, when adopting low level boring or the extraction of low level tunnel, boring, the sealing in tunnel also is a key point, the joint part of boring or tunnel and extraction pipeline will seal, and can not leak gas.When adopting low level hole pumping and mining gas, boring is tightly sealed; When adopting low level tunnel mash gas extraction, the tunnel is tightly sealed, can not link up very smoothly to guarantee boring or extraction tunnel and space outerpace, thus the efficient of raising gas pumping.
Low level boring or low level tunnel operated by rotary motion are in the caving zone of coal-face; The tail tunnel tightly must be sealed when adopting tail tunnel extraction goaf gas, so that extract more gas.
In addition, when mash gas extraction, also the extraction concentration that self-measuring device is monitored gas at any time need be installed on the extraction pipeline, to set the ability of extraction equipment mash gas extraction according to gas density, when increasing as concentration when the gas of extraction, then increase the ability of mash gas extraction accordingly, when the concentration of the gas of extraction reduces, can suitably reduce the ability of mash gas extraction.When the concentration when gas obviously increases, as when increasing to a certain default threshold values, the situation that a large amount of gas are gushed out may appear in the upper corner that coal-face then is described, also need to carry out emergency measure this moment, in time upper corner is adopted the mode of leakage stopping, upper corner gas is revealed control effectively by injecting gel etc., increase the ability of mash gas extraction simultaneously.
In addition, also need in time to analyze goaf top plate inbreak situation, when the goaf top plate inbreak is tight, should cancel air partition to the goaf wind-guiding, and in time the corner up and down of work plane be carried out filling, reduce the goaf and leak out, strengthen the extraction ability simultaneously, improve the extraction effect.
In concrete enforcement, the area that the rational position of the boring of gas drainage under suction group, roadway arrangement will consider to satisfy extraction is big, boring, length inside, tunnel all can be carried out effective extraction.In addition, also need to consider the extraction drill site, the difficulty of roadway construction of holing, draw out methane, and avoid the normal actual mining of work plane is caused interference.
For the gas in goaf is further discharged, can also discharge the foam that looses to the goaf, can reduce the free space in goaf thus, effectively reduce the gas burden in goaf, can also improve the extraction effect of gas simultaneously.For improving the filling effect of foam to the goaf, this foam should be selected easily to produce, the flame-retardant and anti-static foam that just dissipated at least 48 hours.
In the foregoing description, sharp air partition wind-guiding dilution goaf gas, adopt the gas in low level boring or extraction goaf, low level tunnel, and diffuse the flame-retardant and anti-static foam to the goaf, reduce the free space in goaf, improve the extraction effect of gas, make the gas of coal work can access effective improvement thus, improved the safety of coal work.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing might not be that enforcement the present invention is necessary.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. the method for a coal-face gas control is characterized in that, described method comprises:
During first the adopting of coal-face, hang air partition to the goaf wind-guiding;
Adopt the gas in boring or extraction goaf, tunnel;
Diffuse foam to the goaf, to reduce the gas burden in goaf.
2. the method for coal-face gas control according to claim 1 is characterized in that, the described air partition of hanging during first the adopting of coal-face comprises to the goaf wind-guiding:
During first the adopting of coal-face, hang air partition to the goaf wind-guiding from the coal work basifacial portion of making progress, that hangs air partition is spaced apart 20 meters to 30 meters.
3. the method for coal-face gas control according to claim 1 is characterized in that, the gas in described employing boring or extraction goaf, tunnel comprises:
Adopt the gas in low level boring or low level tunnel or extraction goaf, tail tunnel.
4. the method for coal-face gas control according to claim 3 is characterized in that, described method also comprises:
When adopting low level hole pumping and mining gas, boring is tightly sealed; When adopting low level tunnel or tail tunnel mash gas extraction, the tunnel is tightly sealed.
5. the method for coal-face gas control according to claim 1 is characterized in that, described method also comprises:
When mash gas extraction, the concentration of the gas of self-measuring device monitoring extraction is installed on the extraction pipeline, to set the ability of mash gas extraction according to the concentration of the gas of extraction, when the concentration of the gas of extraction increases, the ability of then corresponding increase mash gas extraction, when the gas density of extraction reduces, the then corresponding ability that reduces mash gas extraction.
6. the method for coal-face gas control according to claim 4 is characterized in that, described method also comprises:
When the concentration of the gas that detects extraction increased to default threshold values, then the upper corner to coal work adopted the mode of leakage stopping to control the gas leakage, and increases the gas pumping ability.
7. the method for coal-face gas control according to claim 1 is characterized in that, described foam is for easily producing the flame-retardant and anti-static foam that just dissipated at least 48 hours.
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| CN2010101418149A CN102207004A (en) | 2010-03-30 | 2010-03-30 | Method for carrying out gas control on coal faces |
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| CN2010101418149A CN102207004A (en) | 2010-03-30 | 2010-03-30 | Method for carrying out gas control on coal faces |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797494A (en) * | 2012-08-22 | 2012-11-28 | 山西晋城无烟煤矿业集团有限责任公司 | Method for discharging gas through air on fully mechanized coal face |
| CN103016049A (en) * | 2012-12-24 | 2013-04-03 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN107035403A (en) * | 2016-12-13 | 2017-08-11 | 中铁隧道集团有限公司 | A kind of non-explosion-proof flexible transport method in high methane and Gas Outburst tunnel |
| CN111894656A (en) * | 2020-06-24 | 2020-11-06 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in working face goaf of single thick coal seam by stages and zones |
| CN113236344A (en) * | 2021-06-11 | 2021-08-10 | 煤炭科学技术研究院有限公司 | Device and method for preventing spontaneous combustion of coal seam by injecting nitrogen gas and mixing with flame retardant through displacement and pumping promotion |
| CN117052412A (en) * | 2023-10-10 | 2023-11-14 | 太原理工大学 | Gob-side entry driving method for high-gas coal seam |
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| CN1532374A (en) * | 2003-03-18 | 2004-09-29 | 淮南矿业(集团)有限责任公司 | Method for pumping out gas from mining coal layer roof |
| WO2009039776A1 (en) * | 2007-09-19 | 2009-04-02 | Institute Of Rock And Soil Mechanice, Chinese Academy Of Sciences | An exploitation system and method for displacing coal bed gas by mixed gas through a pumping drainage way which is under a well |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797494A (en) * | 2012-08-22 | 2012-11-28 | 山西晋城无烟煤矿业集团有限责任公司 | Method for discharging gas through air on fully mechanized coal face |
| CN103016049A (en) * | 2012-12-24 | 2013-04-03 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN103016049B (en) * | 2012-12-24 | 2014-12-17 | 大同煤矿集团有限责任公司 | Comprehensive treatment method of gas on firstly mined permian system working face |
| CN107035403A (en) * | 2016-12-13 | 2017-08-11 | 中铁隧道集团有限公司 | A kind of non-explosion-proof flexible transport method in high methane and Gas Outburst tunnel |
| CN107035403B (en) * | 2016-12-13 | 2019-06-04 | 中铁隧道集团有限公司 | A kind of high methane and the non-explosion-proof flexible transport method in Gas Outburst tunnel |
| CN111894656A (en) * | 2020-06-24 | 2020-11-06 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in working face goaf of single thick coal seam by stages and zones |
| CN113236344A (en) * | 2021-06-11 | 2021-08-10 | 煤炭科学技术研究院有限公司 | Device and method for preventing spontaneous combustion of coal seam by injecting nitrogen gas and mixing with flame retardant through displacement and pumping promotion |
| CN113236344B (en) * | 2021-06-11 | 2023-10-13 | 煤炭科学技术研究院有限公司 | Device and method for preventing and controlling spontaneous combustion of coal seam by injecting nitrogen and mixing flame retardant for displacement pumping promotion |
| CN117052412A (en) * | 2023-10-10 | 2023-11-14 | 太原理工大学 | Gob-side entry driving method for high-gas coal seam |
| CN117052412B (en) * | 2023-10-10 | 2023-12-12 | 太原理工大学 | Gob-side entry driving method for high-gas coal seam |
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Application publication date: 20111005 |