CN101598030A - Method for realizing fast coal exposing of coal seam rock cross with outburst danger - Google Patents
Method for realizing fast coal exposing of coal seam rock cross with outburst danger Download PDFInfo
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- CN101598030A CN101598030A CNA2009101821175A CN200910182117A CN101598030A CN 101598030 A CN101598030 A CN 101598030A CN A2009101821175 A CNA2009101821175 A CN A2009101821175A CN 200910182117 A CN200910182117 A CN 200910182117A CN 101598030 A CN101598030 A CN 101598030A
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Abstract
A kind of method for realizing fast coal exposing of coal seam rock cross with outburst danger is particularly useful for having in the colliery the quick exposed coal of strong outburst hazard crossdrift.By at the certain thickness solid strong circle of crossdrift periphery manufacturing and a weak circle, form a protection structure that power is strong for 1~2 times of the strong circle of reinforcing thickness.Weak circle can effectively absorb geostatic stress release in deep in the exposed coal process and the energy of generation, S. E. A. can reach 50%~90%, effectively buffering is to the impact of tunnel-surrounding, make the original geostatic stress around the tunnel reduce by 40%~90% simultaneously, need only resist the outstanding and impact that residual stress causes the tunnel in the exposed coal process and reinforce strong circle, guarantee safety.This method is guaranteeing to reduce extinction engineering quantity 20%~30% under the condition of safe exposed coal.Reduce the gas drainage under suction time, shorten construction period, safe exposed coal speed improves 20%~50%.
Description
Technical field
The present invention relates to method for realizing fast coal exposing of coal seam rock cross with outburst danger, be particularly useful for having in the colliery the quick exposed coal of strong outburst hazard crossdrift.
Background technology
In the outburst danger mine during stone door punching coal the easiest generation outstanding, each mining area is large-scale outstanding when all occurring in this basically, seriously restricts mine safety and produces fast.At present; there is the stone door punching coal method of outburst hazard to mainly contain hydraulic flushing in hole; hydraulic slotted liner technique; metallic framework etc.; but these measures are just played simple reduction or reinforcement effect to the coal and rock of exposed coal point; form single protection structure, do not discharge the deep geostatic stress, the impact energy that can not cut off or cushion its dispose procedure generation is to giving prominence to and percussion that cause in the tunnel.In exposed coal moment, because coal and rock opens rapidly, must cause that stress readjusts rapidly under the effect of blowing out, the energy that coal and rock produces during with the deep stress release is delivered to the tunnel, produces and impacts, and take place outstanding easily.But engineering practice shows that stone door punching coal speed is still very slow under the protection of these methods, is one of the most dangerous operating procedure, wastes a large amount of manpower and materials, influences programming, causes debalance of preparation and winning work.Particularly New Built Mine because early investment is big, and is never produced, and never allows the waste plenty of time.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of method for realizing fast coal exposing of coal seam rock cross with outburst danger, force solid coil structures by power of artificial formation, each is reinforced between the ring layer and cooperatively interacts, and finally eliminates the outburst hazard of exposed coal point coal body, reaches the purpose of exposed coal safely and fast.
Technical scheme: method for realizing fast coal exposing of coal seam rock cross with outburst danger of the present invention:
A, when the about 10m in roadway distance coal seam of driving, to the coal seam direction hole of drilling, till passing the coal seam, the enforcement gas exhaust;
B, continue driving, when being 2~5m in the distance coal seam, the meet head on coal and rock of the peripheral depths of coal body certain distance of tunnel is destroyed, make coal and rock form strong, weak, strong structure, wherein the destruction place is weak circle;
Gas in c, the weak circle of pump drainage;
The coal seam of d, the coal body periphery of meeting head in the tunnel and directly the top and directly the end evenly inject cement paste apart from the coal seam in about 0.5m and reinforce, form the uniform ring coal body reinforcing on every side of meeting head on around the tunnel and enclose by force;
E, destroy tunnel meet head on coal body and pump drainage gas;
F, driving according to a conventional method, and pass the coal body of meeting head on and enter the about 2m in direct top, exposed coal work finished.
The thickness of the strong circle of described reinforcing is 0.5~1 times of tunnel size; The described peripheral depths of the coal body certain distance of meeting head on is for reinforcing strong 1~2 times of enclosing thickness.
Beneficial effect: the present invention is by making strong and weak strong protection structure, the safety that has improved the exposed coal process.Weak circle makes the original geostatic stress around the tunnel reduce by 40%~90%, effectively absorb the outstanding and impact energy that produces owing to stress release in the exposed coal process simultaneously, S. E. A. can reach 50%~90%, thereby the deep geostatic stress has reduced the impact to the tunnel to the influence in tunnel in buffering and the partition exposed coal process; Reinforce strong circle only need the weak circle of opposing to absorb and buffering after the impact of residual amount of energy injected reinforcement material owing to reinforce in the strong circle, its intensity increases greatly, the ability that opposing is impacted also increases.Like this, strong circle and weak circle interact in the process of protection tunnel, have guaranteed the safety of exposed coal process.This cover method is guaranteeing to reduce extinction engineering quantity 20%~30% under the condition of safe exposed coal.Reduce the gas drainage under suction time, shorten construction period, safe exposed coal speed improves 20%~50%, has fabulous promotional value.
Description of drawings
Fig. 1 is a realizing fast coal exposing of coal seam rock cross with outburst danger structural representation of the present invention.
Fig. 2 is the A-A generalized section of Fig. 1.
Among the figure: the 1-tunnel, 2-reinforces strong circle, the weak circle of 3-, the 4-coal seam, the basic end of 5-, the direct end of 6-, the 7-coal body of meeting head in the tunnel, 8-directly pushes up, and 9-pushes up substantially.
The specific embodiment
The invention will be further described below in conjunction with the embodiment in the accompanying drawing:
Method for realizing fast coal exposing of coal seam rock cross with outburst danger of the present invention, according to looking into geologic parameter: coal seam thickness, inclination angle, trend, gas parameter, hydrologic regime, the trend in tunnel, size and other have the parameter of requirement in construction, formulate detailed exposed coal scheme.Carry out the preceding preparation of exposed coal, rationally handle the crack gas of exposed coal point, other hazards such as water.The further mensuration coal seam above-mentioned parameter during apart from coal seam 4 about 10m in the tunnel 1 of driving, arrange to meet head in boring extraction or discharging tunnel and on every side 8m with interior gas, and according to the lithology and the gas parameter of coal rock layer, determine to reinforce the thickness of strong circle 2 and weak circle 3, the thickness of the strong circle 2 of reinforcing is that 0.5~1 times of tunnel size is advisable, and the thickness of weak circle 3 is advisable for strong 1~2 times of enclosing thickness, can not surpass 6m, when the big hour circle layer thickness of outburst hazard is got big value, otherwise get the small value.For example, the diameter of circular tunnel is 4m, and the thickness of then reinforcing strong circle 2 should be 2m, and the thickness of weak circle 3 is when being 2~4m, and more suitable, the thickness of weak circle also can continue to increase, but the extinction effect will be no longer clearly, and requirement can not surpass 6m.In addition, the width of reinforcing strong circle 2 and weak circle 3 is when comprising whole coal seam thickness, enter direct top 8 and be no less than 0.5m with the direct end 6, when direct top 8 or directly the ends 6 thickness be lower than 0.5m, slurries can be injected into basic top 9 or 0.5m at the basic end 5, guarantee when deforming, between different lithology, can not produce powerful shearing force with this, and avoid interface between the rock stratum, create conditions for outstanding by heavy damage.Under the situation that meets country and school, ore deposit side inspection index, continue driving, and (exposed coal point) stops driving when being 2~5m in distance coal seam 4, by high-pressure water jet slot technology, technology such as hydraulic flushing in hole or loosening big gun is made weak circle 3 places and is weakened drawing up, and makes coal and rock form strong, weak, strong structure; The effect of reduction is unreasonable thinks that the extinction effect is good more.Weak circle 3 can reduce near the geostatic stress 40%~90% the crossdrift, and make gas to be discharged smoothly.Weak simultaneously circle 3 can effectively cut off the propagation of the impact energy that produces when the depths geostatic stress discharges, make impact energy can not be delivered to tunnel 1, or because after the absorption of weak circle 3 impact energy, have only a spot of impact energy can be delivered to tunnel 1, percussion obviously reduces, and guarantees the safety in tunnel 1 with this.The method that draws out methane according to routine after weak circle 3 forms draws out methane, and reduces gas bearing capacity, reduces the gas expansion energy, eliminates outburst hazard.Slot or punching in coal body 7 is met head in the tunnel by high-pressure water jet slot or hydraulic flushing technology, to discharge geostatic stress, firedamp drainage reduces gas pressure, eliminate the meet head on outburst hazard of coal body 7 of tunnel, the distance of the coal body 7 peripheral depths of meeting head on is for reinforcing 1~2 times of strong circle gauge.After weak circle 3 forms, implement boring to preparing to make the locality of reinforcing strong circle 2, and according to conventional method injection cement paste or the reinforcing of other reinforcement materials, increase the intensity of reinforcing strong circle 2, increase the outstanding ability of its opposing, and the impact of the remaining impact energy after effectively opposing is absorbed by weak circle 3, guarantee the safety in tunnel 1.After reinforcement material solidifies, need to detect consolidation effect.Hole again in the zone of implementing grouting and reinforcing, boring requirement is in the centre position of initial inlet well, after the drilling construction, method sealing of hole and cement injection according to routine, if slurries can inject smoothly, illustrate that then consolidation effect is undesirable, need heavy to the complement boring again of slip casting zone, and grouting and reinforcing once more.When slurries can not inject smoothly, illustrate that slip casting effect is up to standard.After waiting for that slurries all solidify, can and enter top board 2m, finish stone door punching coal work according to the method for uncovering coal digging laneway of routine.In the process of whole stone door punching coal, in time carry out supporting.
Claims (3)
1, a kind of method for realizing fast coal exposing of coal seam rock cross with outburst danger is characterized in that:
A, in the tunnel (1) of driving during apart from the about 10m in coal seam (4), to the coal seam direction hole of drilling, till passing the coal seam, the enforcement gas exhaust;
B, continue driving, when being 2~5m in distance coal seam (4), the meet head on coal and rock of the peripheral depths of coal body (7) certain distance of tunnel is destroyed, make coal and rock form strong, weak, strong structure, wherein the destruction place is weak circle (3);
Gas in c, the weak circle of pump drainage (3);
D, destroy tunnel meet head on coal body (7) and pump drainage gas;
E, the tunnel meet head on the coal seam (4) of coal body (7) periphery and directly top (8) and directly the end (6) apart from the about 0.5m in coal seam (4) in evenly injection cement paste reinforcing, (2) are enclosed in coal body (7) reinforcing on every side of meeting head on around the tunnel of formation uniform ring by force;
F, driving according to a conventional method, and pass the coal body of meeting head on (7) and enter the about 2m in direct top (8), exposed coal work finished.
2, method for realizing fast coal exposing of coal seam rock cross with outburst danger according to claim 1 is characterized in that: the thickness that (2) are enclosed in described reinforcing by force is 0.5~1 times of tunnel (1) size.
3, method for realizing fast coal exposing of coal seam rock cross with outburst danger according to claim 1 is characterized in that: the peripheral depths of the described coal body of meeting head on (7) certain distance is for reinforcing strong 1~2 times of enclosing (2) thickness.
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CN101975076A (en) * | 2010-09-21 | 2011-02-16 | 安徽理工大学 | Structure for preventing coal and gas outburst and method for preventing outburst |
CN101979835A (en) * | 2010-09-21 | 2011-02-23 | 安徽省煤田地质局第一勘探队 | Method for preventing coal and gas burst by drill communicated coal mining exhaust |
CN102242640A (en) * | 2011-07-05 | 2011-11-16 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
CN103291301A (en) * | 2012-02-22 | 2013-09-11 | 重庆巨能建设(集团)有限公司 | Pilot-tunneling method for coal uncovering |
CN103306713A (en) * | 2013-05-20 | 2013-09-18 | 中国矿业大学 | Networking reinforcement method for cross drilling holes of outburst coal seam |
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CN103510958A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Gentle dip super-high seam rock cross-cut coal uncovering method |
CN103510957A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Combined rock cross-cut coal uncovering method |
CN104213921A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting |
CN104213932A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Outburst coal bed hydraulic phase change cracking cross-cut coal uncovering method |
CN105221150A (en) * | 2015-09-22 | 2016-01-06 | 中国矿业大学 | A kind of method of horizontal jet grouting stake reinforced stone door punching coal |
CN106194245A (en) * | 2016-09-29 | 2016-12-07 | 陈清泉 | A kind of three-in-one gas pumping method and structure thereof |
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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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GB2095308A (en) * | 1981-03-24 | 1982-09-29 | Willich F Gmbh & Co | Method and apparatus for consolidating rock strata |
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RU2342531C1 (en) * | 2007-06-27 | 2008-12-27 | ЗАО "Межведомственная комиссия по взрывному делу при Академии горных наук" (ЗАО "МВК по ВД при АГН") | Combined method of loosening coal massif and facility for implementation of this method |
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CN101975076A (en) * | 2010-09-21 | 2011-02-16 | 安徽理工大学 | Structure for preventing coal and gas outburst and method for preventing outburst |
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CN102242640A (en) * | 2011-07-05 | 2011-11-16 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
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