CN103498644A - Outburst prevention method in rock cross-cut coal uncovering and gas outburst coal seam double-curtain grouting - Google Patents
Outburst prevention method in rock cross-cut coal uncovering and gas outburst coal seam double-curtain grouting Download PDFInfo
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- CN103498644A CN103498644A CN201310453363.6A CN201310453363A CN103498644A CN 103498644 A CN103498644 A CN 103498644A CN 201310453363 A CN201310453363 A CN 201310453363A CN 103498644 A CN103498644 A CN 103498644A
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Abstract
An outburst prevention method in rock cross-cut coal uncovering and gas outburst coal seam double-curtain grouting is suitable for being used in a mining work face. When the minimum excavated normal distance from a rock cross-cut coal uncovering work face to a coal seam is no less than 7m, two circles of cross-measure grouting holes inclining to the outer side of a cross cut are drilled in the front side of the rock cross-cut coal uncovering work face in the coal seam direction, cement mortar are injected into the cross-measure grouting holes, two gas leakage prevention curtains are manufactured in coal around the rock cross-cut coal uncovering work face to prevent gas around the cross cut to move to the direction of the cross cut, and then the cross-measure grouting holes are used for pre-vacuum of gas in the coal seam in front of the cross cut to reduce pressure and content of the gas. The method is simple and easy to achieve, short in working hour, safe, efficient and low in cost.
Description
Technical field
The present invention relates to a kind of anti-burst method, be particularly useful for the stone door punching coal and the two curtain-grouting anti-burst methods of Coal Seam Prone To Outburst that use in a kind of coal-face.
Background technology
Gas is one of principal element of serious threat Safety of Coal Mine Production, in the Coal Accidents of China, more than 70%, is gas accident.At present China's pit mining presents that mining depth is large, gas permeability of coal seam is low, gas pressure is high, gas bearing capacity is taken out the characteristics such as coal-bed gas difficulty greatly, in advance, add the working seam complex geologic conditions, be subject to mining influence, will produce the outstanding dynamic phenomenon of coal and gas under certain condition.
In coal and gas burst accident, when having exposed coal and Seams With Hazard of Outburst, be easier to occur.Because ocurrence of coal seam is unstable and exist inclination angle, down-hole crossdrift to expose that the number of times of coal and Seams With Hazard of Outburst is more, danger increases increasingly, to the life security of coal miner, threaten, restricting the safe and efficient production of mine.At present, the anti-burst method of stone door punching coal mainly contains drilling gas exhaust method, drilling gas discharge and metallic framework method, drill mash gas method etc.But, coal-bed gas flows and meets ball to flowing, and the gas flow field belongs to ball and exists to flow field, can be endlessly to crossdrift direction supply gas under the gas pressure gradient effect, effectively around the reduction crossdrift, coal seam gas-bearing capacity and pressure ratio are more difficult, and coal and gas outburst risk still exist.
Summary of the invention
The objective of the invention is to overcome the deficiency in prior art, a kind of stone door punching coal and Coal Seam Prone To Outburst curtain-grouting anti-burst method are provided, by to wearing a layer inlet well injected water cement mortar, form anti-gas permeation curtain, intercepting crossdrift gas on every side migrates to the crossdrift direction, implement again regional extinction measure, thereby eliminate exposed coal zone coal and gas outburst risk.
The two curtain-grouting anti-burst methods of stone door punching coal of the present invention and Coal Seam Prone To Outburst comprise the following steps:
A. the stone door punching coal work plane in stone door punching coal tunnel driving is when the minimum normal distance apart from coal seam is greater than and approach 7m, at first the brill two to the coal seam direction along stone door punching coal tunnel outer rim of meeting head at the stone door punching coal work plane encloses layer inlet well of wearing of inclination laterally, the described distance L of layer inlet well through roof place to stone door punching coal tunnel of wearing
1for 15m, the described distance L of layer inlet well through seat earth place to stone door punching coal tunnel of wearing
2for 8m;
B. carry out filling to wearing injected water cement mortar in layer inlet well, make adjacent coal and rock of wearing between layer inlet well form absciss layer, after cement mortar is solidified, form the anti-gas permeation curtain of twice arch in the coal and rock of stone door punching coal work plane periphery;
C. from the stone door punching coal work plane to twice, the coal seam direction of anti-gas permeation curtain parcel is evenly bored some layer extraction boreholes of wearing, and the described layer extraction borehole of wearing is not less than 0.5m through the distance of roof or base plate;
D. after wearing layer pre-draining borehole boring, carry out the sealing of hole processing, by wearing layer extraction borehole gas pumping equipment pipeline default with down-hole after sealing of hole, be connected, the gas started wearing in layer pre-draining borehole carries out extraction, until the remaining gas pressure in the coal seam of the anti-gas permeation curtain parcel of twice drops to below 0.74MPa, or gas remainder quantity drops to 8.00 m
3below/t, stop gas pumping, the protrusion-dispelling that completes coal and gas is processed.
2. two curtain-grouting anti-burst methods of a kind of stone door punching coal according to claim 1 and Coal Seam Prone To Outburst, it is characterized in that: on described anti-gas permeation curtain, adjacent distance of wearing between layer inlet well is 0.5～1.0m.
Beneficial effect: the two curtains of the anti-gas permeation in this anti-burst method have stoped the gas of gas supply source around crossdrift to flow to the crossdrift direction effectively, can guarantee the extracting result of curtain Inner extraction borehole around crossdrift; The only construction two intensive boring of circle the slip castings on existing stone door punching coal and Coal Seam Prone To Outburst anti-burst method basis of this anti-burst method, with low cost, it is simple, construction is fast and grouting and reinforcing coal body, strengthened roof stability, improved gas pumping efficiency, accelerate stone door punching coal speed, realized safe and efficient exposed coal.
The accompanying drawing explanation
Fig. 1 is elevation construction schematic diagram of the present invention.
Fig. 2 is construction schematic diagram in plane of the present invention.
In figure: 1-crossdrift; 2-anti-gas permeation curtain; 3-wear a layer inlet well; 4-coal seam; 5-wear a layer extraction borehole; 6-stone door punching coal work plane.
The specific embodiment
Below in conjunction with accompanying drawing, enforcement of the present invention is further described:
As depicted in figs. 1 and 2, the two curtain-grouting anti-burst method steps of stone door punching coal of the present invention and Coal Seam Prone To Outburst are as follows:
A. the stone door punching coal work plane in stone door punching coal tunnel 16 driving is to apart from coal seam, 4 minimum normal distance is greater than and while approaching 7m, at first in to coal seam 4 directions of meeting head on of stone door punching coal work plane 6, along the stone door punching coal tunnel, 1 outer rim bores that two circles tilt laterally wears layer inlet well 3, the described distance L of layer inlet well 3 through 4 top board places, coal seam to stone door punching coal tunnel 1 of wearing
1for 15m, the described distance L of layer inlet well 3 through 4 base plate places, coal seam to stone door punching coal tunnel 1 of wearing
2for 8m;
B. carry out filling to wearing the interior injected water cement mortar of layer inlet well 3, make adjacent coal and rock of wearing between layer inlet well 3 form absciss layer, after cement mortar is solidified, form the anti-gas permeation curtain 2 of twice arch in the coal and rock of stone door punching coal work plane 6 peripheries, on described anti-gas permeation curtain 2, adjacent distance of wearing between layer inlet well 3 is 0.5～1.0m;
C. from stone door punching coal work plane 6 to twice, coal seam 4 directions of anti-gas permeation curtain 2 parcels are evenly bored some layer extraction boreholes 5 of wearing, requirement by " control coal and Gas Outburst regulation ", layer extraction borehole 5 worn in the anti-nearest inclination of gas permeation curtain 2 of distance, and through coal seam 4 top boards or base plate place, along coal seam, 4 tops or base plate aspect to the distance of stone door punching coal tunnel 1 outline line is not less than 12m, the described layer extraction borehole 5 worn is not less than 0.5m through the distance of coal seam 4 top boards or base plate
D. after wearing 5 borings of layer pre-draining borehole, carry out the sealing of hole processing, by wearing layer extraction borehole 5 gas pumping equipment pipeline default with down-hole after sealing of hole, be connected, the gas started wearing in layer pre-draining borehole 5 carries out extraction, until the remaining gas pressure in the coal seam 4 of anti-gas permeation curtain 2 parcels of twice drops to below 0.74MPa, or gas remainder quantity drops to 8.00 m
3below/t, stop gas pumping, the protrusion-dispelling that completes coal and gas is processed.
Claims (2)
1. two curtain-grouting anti-burst methods of a stone door punching coal and Coal Seam Prone To Outburst is characterized in that step is as follows:
A. the stone door punching coal work plane (6) in stone door punching coal tunnel (1) driving is to apart from coal seam, the minimum normal distance of (4) is greater than and while approaching 7m, that at first in to coal seam (4) direction of meeting head on of stone door punching coal work plane (6), along stone door punching coal tunnel (1) outer rim, bores that two circles tilt laterally wears a layer inlet well (3), the described distance L of a layer inlet well (3) through top board place, coal seam (4) to stone door punching coal tunnel (1) of wearing
1for 15m, the described distance L of a layer inlet well (3) through base plate place, coal seam (4) to stone door punching coal tunnel (1) of wearing
2for 8m;
B. carry out filling to wearing the interior injected water cement mortar of a layer inlet well (3), make adjacent coal and rock of wearing between a layer inlet well (3) form absciss layer, after cement mortar is solidified, form the anti-gas permeation curtain (2) of twice arch in the coal and rock of stone door punching coal work plane (6) periphery;
C. from stone door punching coal work plane (6) to twice, coal seam (4) direction of anti-gas permeation curtain (2) parcel is evenly bored some layer extraction boreholes (5) of wearing, and the described layer extraction borehole (5) of wearing is not less than 0.5m through the distance of coal seam (4) top board or base plate;
D. after wearing a layer pre-draining borehole (5) boring, carry out the sealing of hole processing, by wearing a layer extraction borehole (5) the gas pumping equipment pipeline default with down-hole after sealing of hole, be connected, the gas started wearing in a layer pre-draining borehole (5) carries out extraction, until the remaining gas pressure in the coal seam (4) of anti-gas permeation curtain (2) parcel of twice drops to below 0.74MPa, or gas remainder quantity drops to 8.00 m
3below/t, stop gas pumping, the protrusion-dispelling that completes coal and gas is processed.
2. two curtain-grouting anti-burst methods of a kind of stone door punching coal according to claim 1 and Coal Seam Prone To Outburst, it is characterized in that: the upper adjacent distance of wearing between a layer inlet well (3) of described anti-gas permeation curtain (2) is 0.5～1.0m.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
| CN109057803A (en) * | 2018-08-13 | 2018-12-21 | 贵州省水利水电勘测设计研究院 | A kind of excavation method for coal and gas prominent hydraulic tunnel |
| CN109209293A (en) * | 2018-11-16 | 2019-01-15 | 辽宁工程技术大学 | A kind of crossdrift takes off projecting coal bed comprehensive outburst control construction method |
| CN109236353A (en) * | 2018-09-21 | 2019-01-18 | 中铁十六局集团有限公司 | A kind of exposed coal protrusion-dispelling construction method in high methane Tunnel Passing coal seam |
| CN110219672A (en) * | 2019-05-24 | 2019-09-10 | 贵州大学 | A kind of tunnel broken coal petrography grouting strengthening method for main haulage roadway working face |
| CN111779463A (en) * | 2020-08-18 | 2020-10-16 | 中国建筑第四工程局有限公司 | Coal uncovering outburst prevention construction method for super-thick coal seam of gas outburst tunnel of highway |
| CN114658443A (en) * | 2021-12-27 | 2022-06-24 | 贵州盘江精煤股份有限公司 | Rapid coal uncovering method for grouting of stone gate |
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| CN101343988A (en) * | 2008-08-16 | 2009-01-14 | 甘肃铁道综合工程勘察院有限公司 | Deep layer cement-soil mixing pile grouting water-blocking method for artesian area |
| CN102409997A (en) * | 2011-12-09 | 2012-04-11 | 中国矿业大学 | Curtain grouting anti-burst method for cutting through coal and gas bursting seam in shaft |
| CN102704986A (en) * | 2012-06-26 | 2012-10-03 | 河北同成矿业科技有限公司 | Pressure-controlled hole sealing method for gas drainage hole |
| CN102937011A (en) * | 2012-12-03 | 2013-02-20 | 中国矿业大学 | Secondary grouting and plugging device and method of regional crack field of gas extraction and drilling group |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101343988A (en) * | 2008-08-16 | 2009-01-14 | 甘肃铁道综合工程勘察院有限公司 | Deep layer cement-soil mixing pile grouting water-blocking method for artesian area |
| CN102409997A (en) * | 2011-12-09 | 2012-04-11 | 中国矿业大学 | Curtain grouting anti-burst method for cutting through coal and gas bursting seam in shaft |
| CN102704986A (en) * | 2012-06-26 | 2012-10-03 | 河北同成矿业科技有限公司 | Pressure-controlled hole sealing method for gas drainage hole |
| CN102937011A (en) * | 2012-12-03 | 2013-02-20 | 中国矿业大学 | Secondary grouting and plugging device and method of regional crack field of gas extraction and drilling group |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
| CN109057803A (en) * | 2018-08-13 | 2018-12-21 | 贵州省水利水电勘测设计研究院 | A kind of excavation method for coal and gas prominent hydraulic tunnel |
| CN109236353A (en) * | 2018-09-21 | 2019-01-18 | 中铁十六局集团有限公司 | A kind of exposed coal protrusion-dispelling construction method in high methane Tunnel Passing coal seam |
| CN109209293A (en) * | 2018-11-16 | 2019-01-15 | 辽宁工程技术大学 | A kind of crossdrift takes off projecting coal bed comprehensive outburst control construction method |
| CN110219672A (en) * | 2019-05-24 | 2019-09-10 | 贵州大学 | A kind of tunnel broken coal petrography grouting strengthening method for main haulage roadway working face |
| CN111779463A (en) * | 2020-08-18 | 2020-10-16 | 中国建筑第四工程局有限公司 | Coal uncovering outburst prevention construction method for super-thick coal seam of gas outburst tunnel of highway |
| CN114658443A (en) * | 2021-12-27 | 2022-06-24 | 贵州盘江精煤股份有限公司 | Rapid coal uncovering method for grouting of stone gate |
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Application publication date: 20140108 |