CN102425416A - Coal mine high stress area roadway driving face impact ground pressure control method - Google Patents
Coal mine high stress area roadway driving face impact ground pressure control method Download PDFInfo
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- CN102425416A CN102425416A CN2011102828412A CN201110282841A CN102425416A CN 102425416 A CN102425416 A CN 102425416A CN 2011102828412 A CN2011102828412 A CN 2011102828412A CN 201110282841 A CN201110282841 A CN 201110282841A CN 102425416 A CN102425416 A CN 102425416A
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Abstract
The invention discloses a coal mine high stress area roadway driving face impact ground pressure control method, which comprises the following steps that: a control key area of the impact ground pressure is firstly determined; then large-diameter drilling pressure relief is performed for two times on a roadway working face of the control key area along the direction of a roadway; conventional deep hole blasting pressure relief is performed, and driving is performed while the pressure is released so as to thoroughly release the pressure. Deep hole drilling is performend in the high stress coal body, so on one hand, fine distribution of the impact danger is obtained; and on the other hand, the primary pressure relief effect can be realized, the head-on stress distribution can be changed, the impact energy can be greatly released, and the destructive impact danger can be fundamentally reduced.
Description
Technical field
The invention belongs to coal mine roadway driving technology field.
Background technology
Increase along with the pit mining degree of depth; The expansion of limit of mining; Fringe conditions complicated of exploitation, the bump that occurs in the dynamic stress field that primary stress field, exploitation form is more and more serious, and it is unusual etc. that the place ahead of meeting head on of tunnelling process usually is attended by structure, coal rock layer textural anomaly, gas; Therefore, the control of deep-well complex structure heading boring head bump is the technical barrier that needs solution at present.Occur in the damaging impact ground of meeting head in the tunnel and press cause dangerous constantly to increase, the control of this type bump does not at present have the essence difference with the conventional method of preventing and treating, and mainly takes to separate the danger measure, comprises measures such as boring release, common unloading pressure by blasting.Along with mining depth increases, these conventional measures are difficult to reach the purpose that reduces the danger of burst degree in itself, simultaneously owing to there is concealed danger; Its control difficulty is difficult unusually, and the release scope that present means form is little, causes heavily stressed transfer not in place; Energy discharges insufficient; Bump is difficult to control, and the bigger energy release of rank takes place easily, causes great loss.When there is an abnormally high stress roadway head area, implementation of the conventional drilling blasting and drilling relief when drilling very difficult, getting rid of danger less effective.Therefore the bump of meeting head on of the tunnel under heavily stressed, the big buried depth condition controls to and does not also fundamentally reach the degree of control fully so far, invents the meet head on technical method of (being driving face) bump of a kind of employing diffusion principle control tunnel and has great realistic meaning.
Goal of the invention
The objective of the invention is to prevent and treat problem to present deep tunnel boring head bump, the bump that proposes a kind of impact energy " diffusion gradually " release is prevented and treated method.
Technical scheme of the present invention is:
The first step: the control key area of confirming bump
In danger of having a burst seam roadway face, by analogy, the impact of land adjacent stope pressure behavior analysis, judgment, while using deep drilling by means of tunneling front seam on-site testing, the impact of dangerous tendency to get zone, as tunneling head rockburst prevention in key areas;
Second step: large diameter, deep borehole destroys the coal seam, and " expansion " goes out release " band "
(1) at the tunnel work plane of control key area, the trend along the tunnel is carried out the large diameter borehole release first time, and bore diameter is more than 80mm; Bore arrangement mode is, on the work plane of tunnel, arranges a gang drill hole, and a gang drill hole is divided into three groups, every group of three borings; Middle one group of boring is moved towards along the tunnel to creep into, and two groups of borings on both sides are crept into to oblique the place ahead respectively, and boring direction and section angle are the 55-65 degree; Boring in centre of every group of boring is main pressure relief vent, and the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling; Hole depth is bored time pressure relief vent then greater than 20m, and the inferior pressure relief vent degree of depth is less than main pressure relief vent hole depth 5m; The preliminary release in boring back, and beginning tunnelling;
(2) Tunneling 5m, and then along the roadway toward the second large-diameter drilling relief, drilling more than 80mm in diameter, hole layout is arranged in a row of roadway work surface drilling, drilling into a row three groups of three holes, the middle hole in the first set of original drilling boreholes continue to move forward, the two sides along the roadway to drill holes, respectively, each hole in the middle of a based drilling relief holes drilled on both sides for the second relief hole, the first hole drilled three main relief, hole depth greater than 20m, then relief hole drilled times, times smaller than the main relief pressure relief bore hole depth hole depth 5m; drilling after initial relief, and began tunneling; further relief after drilling, and began tunneling;
The 3rd step: conventional deep hole blasting release
Tunneling 5m after excavation work surface and heading face after two hole blasting routine to help the relief; blast, head-first in the roadway destress blasting holes arranged in three, arranged in two groups of 4-6 destress blasting holes, blasting pressure relief hole diameter 42mm, hole depth 6.0-7.0m, from the roadway floor 1.0 ~ 1.3m, hole spacing 4-5m, elevation 0 ~ 3 °, charge length 2.0-3.0m, hole 2-3 evenly arranged in parallel detonators, bore serial connection, once every five hole initiation for final relief; continue excavation;
Tunnel according to the monitoring of above-mentioned steps limit, limit release, limit during the driving.
Good effect of the present invention is: 1, through in high-stress coal, carrying out dark " spy " hole, obtain the trickle distribution of shock hazard on the one hand, play preliminary release effect on the other hand.2, take deep major diameter " expansion " hole, coal body is destroyed, produce big release " band ", changed the stress distribution of meeting head on, discharge impact energy significantly.3, take overlapping major diameter release technology, reservation buffer strip, ensured the safety during the zone of meeting head on is tunneled.4, take to meet head on and way of escape blasting technique, the energy gradation is discharged, fundamentally reduce damaging impact danger.
Description of drawings
Below in conjunction with the description of drawings embodiments of the invention.
Fig. 1 is that the preliminary pressure relief vent of the present invention is arranged sketch map;
Fig. 2 is the present invention's pressure relief vent layout sketch map for the second time
Fig. 3 is the conventional deep hole blasting pressure relief vent of a present invention sketch map.
The specific embodiment
Shown in Fig. 1-3, the concrete steps that colliery of the present invention high stress areas roadway head bump is prevented and treated method are:
The first step: the control key area of confirming bump
In danger of having a burst seam roadway face, by analogy, the impact of land adjacent stope pressure behavior analysis, judgment, while using deep drilling by means of tunneling front seam on-site testing, the impact of dangerous tendency to get zone, as tunneling head rockburst prevention in key areas;
Second step: large diameter, deep borehole destroys the coal seam, and " expansion " goes out release " band "
(1) as shown in Figure 1, the tunnel work plane in the control key area, the trend along the tunnel is carried out the large diameter borehole release first time; Bore diameter is more than 80mm, and bore arrangement mode is, on the work plane of tunnel, arranges a gang drill hole, and a gang drill hole is divided into three groups; Every group of three borings, middle one group of boring is moved towards along the tunnel to creep into, and two groups of borings on both sides are crept into to oblique the place ahead respectively, and boring direction and section angle are the 55-65 degree; Boring in centre of every group of boring is main pressure relief vent, and the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling; Hole depth is bored time pressure relief vent then greater than 20m, and the inferior pressure relief vent degree of depth is less than main pressure relief vent hole depth 5m; The preliminary release in boring back, and beginning tunnelling;
(2) as Shown in Figure 2, Tunneling 5m, and then along the roadway toward the second large-diameter drilling relief, drilling more than 80mm in diameter, hole layout is arranged in a row of roadway work surface drilling, drilling into a row three groups of three holes, the middle hole in the first set of original drilling boreholes continue to move forward, the two sides along the roadway to drill holes, respectively, each hole in the middle of a based drilling relief holes drilled on both sides for the second relief hole, the first hole drilled three main relief, hole depth greater than 20m, then relief hole drilled times, times smaller than the main relief pressure relief bore hole depth hole depth 5m; drilling after initial relief, and began tunneling; further relief after drilling and begin tunneling;
The 3rd step: conventional deep hole blasting release
Shown in Figure 3, tunneling 5m after excavation work surface and heading face after two hole blasting routine to help the relief; head-first in the roadway destress blasting holes arranged in three, arranged in two groups of four -6 destress blasting holes, blasting pressure relief hole diameter 42mm, hole depth 6.0-7.0m, from the roadway floor 1.0 ~ 1.3m, hole spacing 4-5m, elevation 0 ~ 3 °, length 2.0-3.0m charge , 2-3 hole evenly arranged in parallel detonators, bore serial connection, once every five hole initiation for final relief; continue tunneling.
Tunnel according to the monitoring of above-mentioned steps limit, limit release, limit during the driving.
Claims (1)
1. a colliery high stress areas roadway head bump is prevented and treated method, it is characterized in that step is following:
The first step: the control key area of confirming bump
In danger of having a burst seam roadway face, by analogy, the impact of land adjacent stope pressure behavior analysis, judgment, while using deep drilling by means of tunneling front seam on-site testing, the impact of dangerous tendency to get zone, as tunneling head rockburst prevention in key areas;
Second step: large diameter, deep borehole destroys the coal seam, expands to unload pressure zone
(1) at the tunnel work plane of control key area, along the roadway to carry out the first large-diameter drilling relief, drilling more than 80mm in diameter, hole layout is arranged in a row of roadway work surface drilling, a Boring divided into three groups of three holes in the middle along the roadway toward a group of drill drilling holes on both sides of the two groups were diagonally forward drilling, drilling direction and the cross angle of 55 - 65 degrees, each hole drilled in the middle of a main pressure relief holes drilled on both sides for the second relief hole, the first hole drilled three main relief, hole depth greater than 20m, then drill second pressure relief holes times smaller than the main relief pressure relief hole depth holes deep 5m; drilling after initial relief, and began tunneling;
(2) Tunneling 5m, and then along the roadway toward the second large-diameter drilling relief, drilling more than 80mm in diameter, hole layout is arranged in a row of roadway work surface drilling, drilling into a row three groups of three holes, the middle hole in the first set of original drilling boreholes continue to move forward, the two sides along the roadway to drill holes, respectively, each hole in the middle of a based drilling relief holes drilled on both sides for the second relief hole, the first hole drilled three main relief, hole depth greater than 20m, then relief hole drilled times, times smaller than the main relief pressure relief bore hole depth hole depth 5m; drilling after initial relief, and began tunneling; further relief after drilling and begin tunneling;
The 3rd step: conventional deep hole blasting release
Tunneling 5m after excavation work surface and heading face after two hole blasting routine to help the relief; blast, head-first in the roadway destress blasting holes arranged in three, arranged in two groups of 4-6 destress blasting holes, blasting pressure relief hole diameter 42mm, hole depth 6.0-7.0m, from the roadway floor 1.0 ~ 1.3m, hole spacing 4-5m, elevation 0 ~ 3 °, charge length 2.0-3.0m, hole 2-3 evenly arranged in parallel detonators, bore serial connection, once every five hole initiation for final relief; continue tunneling;
Tunnel according to the monitoring of above-mentioned steps limit, limit release, limit during the driving.
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| CN103216265A (en) * | 2013-04-24 | 2013-07-24 | 安徽理工大学 | High-stress roadway surrounding rock deformation control method |
| CN103397883A (en) * | 2013-08-21 | 2013-11-20 | 大同煤矿集团有限责任公司 | Comprehensive control method for rockburst in multiple-coalbed mining mine |
| CN103557755A (en) * | 2013-11-04 | 2014-02-05 | 中国水电顾问集团华东勘测设计研究院有限公司 | Evaluation method of rock-burst control effect of deep-buried tunnel |
| CN103726872A (en) * | 2013-12-30 | 2014-04-16 | 北京科技大学 | Oriented danger removing method for high mine pressure roadway of coal mine |
| CN104989405A (en) * | 2015-06-12 | 2015-10-21 | 北京科技大学 | Large-dip-angle coal mining rock burst orientation prevention method |
| CN105201510A (en) * | 2015-10-27 | 2015-12-30 | 山东科技大学 | Preventing and controlling method for creep-induced rock burst |
| CN105627846A (en) * | 2016-03-10 | 2016-06-01 | 安徽理工大学 | Method for preventing and treating rock burst through deep-hole pressure release blasting |
| CN105626070A (en) * | 2015-12-14 | 2016-06-01 | 辽宁工程技术大学 | Rock burst prevention method through deep hole blasting and depressurizing |
| WO2016107434A1 (en) * | 2014-12-29 | 2016-07-07 | 中国矿业大学 | Regional stress field optimization method for main haulageway |
| CN105863647A (en) * | 2016-03-28 | 2016-08-17 | 辽宁工程技术大学 | Rock burst control method for roadway driving work surface of coal mine high-stress area |
| CN106194186A (en) * | 2016-07-06 | 2016-12-07 | 中国矿业大学 | The drilling release control method of coal wall stope drift active workings advance support section deformation |
| CN106285674A (en) * | 2016-10-20 | 2017-01-04 | 山东科技大学 | The method of impact soft seam tunnel with meeting head on release pressure energy |
| CN107013214A (en) * | 2017-05-12 | 2017-08-04 | 中国矿业大学(北京) | A kind of solution danger method of bump |
| CN108594295A (en) * | 2018-05-31 | 2018-09-28 | 天地科技股份有限公司 | A kind of coal seam unloading pressure by blasting effect evaluation method |
| CN109915141A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | The control method of not wide protection pillar mining roadway bump |
| CN109915142A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | A kind of major fault fringe region Controlling of Coal Outburst method |
| CN109915143A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | The control method of not wide protection pillar working face bump |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | Press control method to a kind of irregular gob-surrounded pillar roadway bump |
| CN110080768A (en) * | 2019-05-01 | 2019-08-02 | 山东科技大学 | A kind of a wide range of rock-burst prevention method of coal mine roadway |
| WO2019148788A1 (en) * | 2018-01-31 | 2019-08-08 | 中国矿业大学 | Method for preventing rock bursts by means of active support reinforcement and active pressure relief |
| CN111365077A (en) * | 2020-03-19 | 2020-07-03 | 中国矿业大学(北京) | Pressure relief and monitoring method for continuous large deformation of deep roadway coal side |
| CN112855123A (en) * | 2021-01-19 | 2021-05-28 | 兖州煤业股份有限公司 | Method for determining depth of large-diameter pressure relief drill hole |
| CN113216968A (en) * | 2021-06-02 | 2021-08-06 | 江苏徐矿能源股份有限公司张双楼煤矿 | Pressure relief and scour prevention method for coal seam merging area |
| CN113914859A (en) * | 2021-09-07 | 2022-01-11 | 中煤科工开采研究院有限公司 | Method for preventing rock burst during coal mine tunneling roadway fault crossing |
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