CN102425416B - 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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- CN102425416B CN102425416B CN 201110282841 CN201110282841A CN102425416B CN 102425416 B CN102425416 B CN 102425416B CN 201110282841 CN201110282841 CN 201110282841 CN 201110282841 A CN201110282841 A CN 201110282841A CN 102425416 B CN102425416 B CN 102425416B
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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 coalbody, 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, 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 class 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 meet head on to have the unusual region of high stress in the tunnel, when implementing conventional drilling and blasting and boring release, creep into just very difficultly, it is relatively poor to separate the danger effect.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 at 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 determining bump
At the digging laneway work plane with the dangerous coal seam of bump, by analogy, face analysis, the judgement of stope bump presentation attributes mutually, adopting the deep drilling means that the scene is carried out in the coal seam in driving the place ahead simultaneously detects, obtain the taxis zone of danger of burst, as the meet head on control key area of bump of tunnelling;
Second step: large diameter, deep borehole destroys the coal seam, and " expansion " goes out release " band "
(1) at the tunnel work plane of preventing and treating the key area, move towards along the tunnel, carry out the large diameter borehole release first time, bore diameter is more than 80mm, bore arrangement mode is that in tunnel work plane layout one gang drill hole, a gang drill hole is divided into three groups, every group of three borings, middle one group of boring is crept into along the tunnel trend, 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, the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling, and hole depth is greater than 20m, bore time pressure relief vent then, 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) behind the tunnelling 5m, move towards large diameter borehole release for the second time again along the tunnel, bore diameter is more than 80mm, bore arrangement mode is, arrange a gang drill hole at the tunnel work plane, one gang drill hole is divided into three groups, every group of three borings, middle one group of boring continues to creep into forward in former boring for the first time, and two groups of borings on both sides are crept into along the tunnel trend respectively, boring in centre of every group of boring is main pressure relief vent, the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling, and hole depth is greater than 20m, bore time pressure relief vent then, 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; The further release of boring back, and beginning tunnelling;
The 3rd step: conventional deep hole blasting release
Behind the tunnelling 5m, help and carry out conventional deep hole blasting release at two on the driving face and behind the driving face; During explosion, at first meet head on to arrange 3 unloading pressure by blasting holes in the tunnel, help to arrange 4-6 unloading pressure by blasting hole two, the diameter 42mm in unloading pressure by blasting hole, hole depth 6.0-7.0m is apart from roadway floor 1.0～1.3m, pitch of holes 4-5m, 0～3 ° at the elevation angle, loaded length 2.0-3.0m evenly arranges 2-3 detonator in parallel, the line of connecting outside the hole in the hole, per 5 hole once detonations carry out final release; Continue driving;
Tunnel according to the monitoring of above-mentioned steps limit, limit release, limit during the driving.
Good effect of the present invention is: 1, by carry out dark " spy " hole in high-stress coal, 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 schematic diagram;
Fig. 2 is the present invention's pressure relief vent layout schematic diagram for the second time
Fig. 3 is the conventional deep hole blasting pressure relief vent of the present invention schematic diagram.
The specific embodiment
As Figure 1-3, colliery of the present invention high stress areas roadway head bump is prevented and treated the concrete steps of method and is:
The first step: the control key area of determining bump
At the digging laneway work plane with the dangerous coal seam of bump, by analogy, face analysis, the judgement of stope bump presentation attributes mutually, adopting the deep drilling means that the scene is carried out in the coal seam in driving the place ahead simultaneously detects, obtain the taxis zone of danger of burst, as the meet head on control key area of bump of tunnelling;
Second step: large diameter, deep borehole destroys the coal seam, and " expansion " goes out release " band "
(1) as shown in Figure 1, tunnel work plane in the control key area, move towards along the tunnel, carry out the large diameter borehole release first time, bore diameter is more than 80mm, and bore arrangement mode is, arrange a gang drill hole at the tunnel work plane, one gang drill hole is divided into three groups, every group of three borings, and middle one group of boring is crept into along the tunnel trend, two groups of borings on both sides are crept into to oblique the place ahead respectively, boring direction and section angle are the 55-65 degree, and 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, behind the tunnelling 5m, move towards large diameter borehole release for the second time again along the tunnel, bore diameter is more than 80mm, bore arrangement mode is, arrange a gang drill hole at the tunnel work plane, a gang drill hole is divided into three groups, every group of three borings, middle one group of boring continues to creep into forward in former boring for the first time, two groups of borings on both sides are crept into along the tunnel trend respectively, and 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; The further release of boring back, and beginning tunnelling;
The 3rd step: conventional deep hole blasting release
As shown in Figure 3, behind the tunnelling 5m, help and carry out conventional deep hole blasting release at two on the driving face and behind the driving face; At first meet head on to arrange 3 unloading pressure by blasting holes in the tunnel, help to arrange 4-6 unloading pressure by blasting hole two, the diameter 42mm in unloading pressure by blasting hole, hole depth 6.0-7.0m, apart from roadway floor 1.0～1.3m, pitch of holes 4-5m, 0～3 ° at the elevation angle, loaded length 2.0-3.0m, evenly arrange 2-3 detonator in parallel in the hole, the line of connecting outside the hole, per 5 hole once detonations carry out final release; Continue driving.
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 as follows:
The first step: the control key area of determining bump
At the digging laneway work plane with the dangerous coal seam of bump, by analogy, face analysis, the judgement of stope bump presentation attributes mutually, adopting the deep drilling means that the scene is carried out in the coal seam in driving the place ahead simultaneously detects, obtain the taxis zone of danger of burst, as the meet head on control key area of bump of tunnelling;
Second step: large diameter, deep borehole destroys the coal seam, expands to unload pressure zone
(1) at the tunnel work plane of preventing and treating the key area, move towards along the tunnel, carry out the large diameter borehole release first time, bore diameter is more than 80mm, bore arrangement mode is that in tunnel work plane layout one gang drill hole, a gang drill hole is divided into three groups, every group of three borings, middle one group of boring is crept into along the tunnel trend, 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, the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling, and hole depth is greater than 20m, bore time pressure relief vent then, 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) behind the tunnelling 5m, move towards large diameter borehole release for the second time again along the tunnel, bore diameter is more than 80mm, bore arrangement mode is, arrange a gang drill hole at the tunnel work plane, one gang drill hole is divided into three groups, every group of three borings, middle one group of boring continues to creep into forward in former boring for the first time, and two groups of borings on both sides are crept into along the tunnel trend respectively, boring in centre of every group of boring is main pressure relief vent, the boring of both sides is time pressure relief vent, three main pressure relief vents of subdrilling, and hole depth is greater than 20m, bore time pressure relief vent then, 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;
The 3rd step: conventional deep hole blasting release
Behind the tunnelling 5m, help and carry out conventional deep hole blasting release at two on the driving face and behind the driving face; During explosion, at first meet head on to arrange 3 unloading pressure by blasting holes in the tunnel, help to arrange 4-6 unloading pressure by blasting hole two, the diameter 42mm in unloading pressure by blasting hole, hole depth 6.0-7.0m is apart from roadway floor 1.0～1.3m, pitch of holes 4-5m, 0～3 ° at the elevation angle, loaded length 2.0-3.0m evenly arranges 2-3 detonator in parallel, the line of connecting outside the hole in the hole, per 5 hole once detonations carry out final release; Continue driving;
Tunnel according to the monitoring of above-mentioned steps limit, limit release, limit during the driving.
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| CN 201110282841 CN102425416B (en) | 2011-09-12 | 2011-09-12 | Coal mine high stress area roadway driving face impact ground pressure control method |
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| CN 201110282841 CN102425416B (en) | 2011-09-12 | 2011-09-12 | Coal mine high stress area roadway driving face impact ground pressure control method |
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| CN103726872B (en) * | 2013-12-30 | 2016-01-13 | 北京科技大学 | A kind of high mine pressure roadway of coal mine oriented solution danger method |
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| 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 |
| CN107013214B (en) * | 2017-05-12 | 2018-12-28 | 中国矿业大学(北京) | A kind of solution danger method of bump |
| CN108386192A (en) * | 2018-01-31 | 2018-08-10 | 中国矿业大学 | A kind of method of active Enhanced support and active release prevention bump |
| CN108594295B (en) * | 2018-05-31 | 2019-12-17 | 天地科技股份有限公司 | Method for evaluating coal bed blasting pressure relief effect |
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| 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 |
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| 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 |
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| CN111365077B (en) * | 2020-03-19 | 2021-02-12 | 中国矿业大学(北京) | Pressure relief and monitoring method for continuous large deformation of deep roadway coal side |
| CN112855123B (en) * | 2021-01-19 | 2023-04-11 | 兖州煤业股份有限公司 | Method for determining depth of pressure relief drilling 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 |
| CN113914859B (en) * | 2021-09-07 | 2023-12-19 | 中煤科工开采研究院有限公司 | Method for preventing rock burst through fault of coal mine tunneling roadway |
| CN115012936B (en) * | 2022-07-13 | 2023-03-21 | 安徽理工大学 | Pressure relief and danger relieving method for coal mine TBM during tunneling and coal penetration |
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