CN102518436A - Method for controlling tectonic rock burst in coal mine tunneling - Google Patents
Method for controlling tectonic rock burst in coal mine tunneling Download PDFInfo
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- CN102518436A CN102518436A CN2011103786830A CN201110378683A CN102518436A CN 102518436 A CN102518436 A CN 102518436A CN 2011103786830 A CN2011103786830 A CN 2011103786830A CN 201110378683 A CN201110378683 A CN 201110378683A CN 102518436 A CN102518436 A CN 102518436A
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Abstract
The invention discloses a method for controlling tectonic rock burst in coal mine tunneling. The method comprises the following steps of: defining a tectonic rock burst danger area; erecting a row of high-strength yielding grouting anchor rods at the top of a tunnel roof being tunneled in the key controlling area along the tunnel; when the yielding grouting anchor rods perform primary yielding through a W steel belt and secondary yielding through a yielding pipe, grouting the gaps of the tectonic area through a grouting device at the tail ends of the yielding grouting anchor rods; and after the tunnel roof is cured, continuing to tunnel forward. In the invention, as the high-strength yielding grouting anchor rods are mounted at the middle part of the tunnel in the tectonic area, the danger of tectonic rock burst is fundamentally reduced; and by adopting the yielding grouting anchor rods for support, the anchor rods can be effectively prevented from being broken by the rock burst load so as to realize the support effect.
Description
Technical field
The invention belongs to the coal mining technical field.
Background technology
Some colliery belongs to complex structure, mine coal seam is composed to deposit and changed the mine big, that coal petrography architectural difference property is big.Along with the increase of the pit mining degree of depth, the fringe conditions of exploitation complicated, the bump that geological structure causes is more outstanding.It is more and more serious with the bump of the dynamic stress field of exploitation formation to occur in structure realm; The place ahead of meeting head on of tunnelling process usually is attended by structure, coal rock layer textural anomaly, dynamic stress and changes greatly with gas unusual etc.; Therefore, the control of deep-well complex structure heading driving bump is the technical barrier that needs solution at present.The dangerous constantly increase that structure type bump when occurring in tunnelling causes, 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 drilling and blasting release, boring release.Along with mining depth increases (generally greater than 800 meters), these conventional measures are difficult to reach the purpose that reduces the danger of burst degree in itself, simultaneously owing to there are the concealed characteristics of structure; Its control difficulty strengthens, and present means are poor to the releasing effect of tectonic stress, the release scope is little, cause 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 was anomalous structure with the dynamic region of high stress in the tunnel, when implementing conventional drilling and blasting with the boring release, it was relatively poor to separate the danger effect.Therefore up to the present the tunnelling bump control under tectonic province, heavily stressed, the big buried depth condition also fundamentally do not reach the degree of control fully.Therefore, inventing a kind of coal mine roadway driving is that the structure type bump is prevented and treated method, has great realistic meaning.
Summary of the invention
The objective of the invention is based on allowing pressure-diffusion principle, the structure type bump is prevented and treated method when proposing a kind of coal mine roadway driving, solves the problem that deep tunnel driving structure bump energy fully discharges.
Technical scheme of the present invention is:
The first step: delineation structure danger of burst zone
In the tunneling process in the dangerous coal seam of bump, through the analysis and the judgement of analogy, tunnel bump presentation attributes, simultaneously based on tunneling the structure spread situation that occurs; Adopt the crustal stress practical observation method; Carry out crustal stress observation, obtain the crustal stress size and Orientation, utilize drilling cuttings method monitoring means to carry out the scene then and detect; Mark off the structure high stress areas, as the control key area of structure type bump;
Second step: let and press and the grouted anchor bar supporting
Trend is made a call to one and is arranged high strength and let the pressure grouted anchor bar along the tunnel at the back top of tunneling of above-mentioned control key area, and anchor pole spacing 2-3m, the degree of depth are to the high stress areas border; When roof strata is soft rock, at first on back, adopt the whole supporting of anchor net, improve the top board second moment of area, and then beat and let the pressure grouted anchor bar;
Described letting presses the grouted anchor bar structure to be, is provided with the afterbody that is provided with injected hole, steel pipe on anchor head, the body at the head of steel pipe and is provided with stop grouting plug, W steel band of model successively, lets and press pipe, pallet, nut and grouting device; Wherein let press pipe let the let pressure pressure of pressure pressure greater than the W steel band of model;
The 3rd step: press and press the pipe secondary allow pressure by allowing when allowing pressure injection slurry anchor pole once allow by the W steel band; After the structural deformation energy is fully discharged; By allowing pressure injection starch the grouting device of anchor pole afterbody, grouting pump carries out slip casting to the slit of structure realm in the connection, and broken rock is cured as one;
The 4th step: continue driving forward after back solidifies again; During the driving, again the roadway floor place is carried out the loosening release explosion of routine, impel the tectonic stress of the roadway floor that is tunneling fully to discharge.
Good effect of the present invention is:
1, through being installed at middle part, the tunnel of structure realm, high strength lets the pressure grouted anchor bar; Can change the constraints of top board, be equivalent to reduce the width in tunnel, top board is behind the release portion tectonic stress; Buckling failure does not take place, and fundamentally reduces the structure type shock hazard.
2, employing lets and presses grouted anchor bar to carry out supporting; Can prevent effectively that the anchor pole load that is hit from taking place disrumpent feelings; Thereby reach supporting effect, let the effect of pressing through the crooked tectonic stress that discharges in rock stratum, to reducing the counter-bending ability that bump intensity increases substantially top board; Increase depth of stratum, stop the effect of tectonic stress.
Description of drawings
Below in conjunction with description of drawings enforcement of the present invention.
Fig. 1 is that the present invention constructs hazardous area and supporting schematic top plan view;
Fig. 2 is that the present invention lets and presses the grouted anchor bar structural representation;
Fig. 3 is the sectional schematic diagram of slip casting sealing of the present invention rock stratum.
The specific embodiment
Practical implementation of the present invention is following:
The first step: in the tunneling process in the dangerous coal seam of bump, through analysis, the judgement of analogy, tunnel bump presentation attributes, simultaneously based on tunneling the structure spread situation that occurs; Adopt the crustal stress practical observation method; Carry out crustal stress observation, obtain the crustal stress size and Orientation, utilize drilling cuttings method monitoring means to carry out the scene then and detect; Mark off the structure high stress areas, as the control key area of structure type bump;
Based on the power of stress distribution, the part shown in Fig. 1 the right is seen in the delineation deathtrap.
Second step: trend is made a call to one and is arranged high strength and let the pressure grouted anchor bar along the tunnel at the back top of tunneling of above-mentioned control key area, and anchor pole spacing 2-3m, the degree of depth are to the high stress areas border; When roof strata is soft rock, at first on back, adopt the whole supporting of anchor net, improve the top board second moment of area, and then beat and let the pressure grouted anchor bar; See the part shown in Fig. 1 left side.
Allow pressure injection slurry anchor structure see Fig. 2.
The 3rd step: press grouted anchor bar once let to press and press the pipe secondary let pressure through letting through the W steel band when letting; After the structural deformation energy is fully discharged; Through letting the grouting device of pressing the grouted anchor bar afterbody; Grouting pump carries out slip casting to the slit of structure realm in the connection, and sealing absciss layer, fissure zone are cured as one with broken rock; See shown in Figure 3.
The 4th step: continue driving forward after back solidifies again; During the driving, again the roadway floor place is carried out the loosening release explosion of routine, impel the tectonic stress of the roadway floor that is tunneling fully to discharge.
Claims (1)
1. the structure type bump was prevented and treated method when a coal mine roadway tunneled, and it is characterized in that step is following:
The first step: delineation structure danger of burst zone
In the tunneling process in the dangerous coal seam of bump, through the analysis and the judgement of analogy, tunnel bump presentation attributes, simultaneously based on tunneling the structure spread situation that occurs; Adopt the crustal stress practical observation method; Carry out crustal stress observation, obtain the crustal stress size and Orientation, utilize drilling cuttings method monitoring means to carry out the scene then and detect; Mark off the structure high stress areas, as the control key area of structure type bump;
Second step: let and press and the grouted anchor bar supporting
Trend is made a call to one and is arranged high strength and let the pressure grouted anchor bar along the tunnel at the back top of tunneling of above-mentioned control key area, and anchor pole spacing 2-3m, the degree of depth are to the high stress areas border; When roof strata is soft rock, at first on back, adopt the whole supporting of anchor net, improve the top board second moment of area, and then beat and let the pressure grouted anchor bar;
Described letting presses the grouted anchor bar structure to be, is provided with the afterbody that is provided with injected hole, steel pipe on anchor head, the body at the head of steel pipe and is provided with stop grouting plug, W steel band of model successively, lets and press pipe, pallet, nut and grouting device; Wherein let press pipe let the let pressure pressure of pressure pressure greater than the W steel band of model;
The 3rd step: press and press the pipe secondary allow pressure by allowing when allowing pressure injection slurry anchor pole once allow by the W steel band; After the structural deformation energy is fully discharged; By allowing pressure injection starch the grouting device of anchor pole afterbody, grouting pump carries out slip casting to the slit of structure realm in the connection, and broken rock is cured as one;
The 4th step: continue driving forward after back solidifies again; During the driving, again the roadway floor place is carried out the loosening release explosion of routine, impel the tectonic stress of the roadway floor that is tunneling fully to discharge.
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| CN201110378683.0A CN102518436B (en) | 2011-11-14 | 2011-11-14 | Method for controlling tectonic rock burst in coal mine tunneling |
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| CN201110378683.0A CN102518436B (en) | 2011-11-14 | 2011-11-14 | Method for controlling tectonic rock burst in coal mine tunneling |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939110A (en) * | 2014-05-07 | 2014-07-23 | 中铁第一勘察设计院集团有限公司 | Strengthening system for slight cracking of existing tunnel arch portion lining |
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN106285680A (en) * | 2016-10-20 | 2017-01-04 | 山东科技大学 | Impact soft seam tunnel way of escape Controlling of Coal Outburst method |
| CN106368705A (en) * | 2016-10-20 | 2017-02-01 | 山东科技大学 | Method for controlling rock burst during roadway tunneling in fault fracture zone |
| CN106401588A (en) * | 2016-10-20 | 2017-02-15 | 山东科技大学 | Method for preventing and treating rock burst during exploiting of working face in fault zone |
| CN106401645A (en) * | 2016-11-03 | 2017-02-15 | 河南理工大学 | Pressure-relief support coordination control method for deep high-stress tunnel based on borehole pressure relief |
| CN106499393A (en) * | 2016-10-20 | 2017-03-15 | 山东科技大学 | Compound seam tunnel way of escape Controlling of Coal Outburst method |
| CN106522949A (en) * | 2016-10-20 | 2017-03-22 | 山东科技大学 | Composite coal seam tunnel head-on impact ground pressure control method |
| CN107237646A (en) * | 2017-06-28 | 2017-10-10 | 山东科技大学 | The quantitative method for protecting support in large deformation constant resistance supporting grouted anchor bar, anchor cable and tunnel |
| CN109026070A (en) * | 2018-08-20 | 2018-12-18 | 中南大学 | A kind of buried lane cave country rock near field stress regulation and control method |
| CN111075479A (en) * | 2019-12-30 | 2020-04-28 | 天地科技股份有限公司 | Stability control method for surrounding rock of roadway |
| CN112483098A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and treating rock burst of advanced broken roof of stope |
| CN112483150A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and controlling rock burst of separation layer roadway |
| CN113739983A (en) * | 2021-07-21 | 2021-12-03 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN115182764A (en) * | 2022-05-12 | 2022-10-14 | 中国平煤神马能源化工集团有限责任公司 | Surrounding rock deformation monitoring anchor rod with high-strength rock burst resistance characteristic |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN103939099B (en) * | 2014-04-11 | 2016-02-03 | 中国矿业大学 | The prevention and controls of the dangerous coal seam group bump of a kind of thump |
| CN103939110A (en) * | 2014-05-07 | 2014-07-23 | 中铁第一勘察设计院集团有限公司 | Strengthening system for slight cracking of existing tunnel arch portion lining |
| CN106285680A (en) * | 2016-10-20 | 2017-01-04 | 山东科技大学 | Impact soft seam tunnel way of escape Controlling of Coal Outburst method |
| CN106368705A (en) * | 2016-10-20 | 2017-02-01 | 山东科技大学 | Method for controlling rock burst during roadway tunneling in fault fracture zone |
| CN106401588A (en) * | 2016-10-20 | 2017-02-15 | 山东科技大学 | Method for preventing and treating rock burst during exploiting of working face in fault zone |
| CN106401588B (en) * | 2016-10-20 | 2019-05-17 | 山东科技大学 | Bump preventing control method during fault zone inner working face is exploited |
| CN106499393A (en) * | 2016-10-20 | 2017-03-15 | 山东科技大学 | Compound seam tunnel way of escape Controlling of Coal Outburst method |
| CN106522949A (en) * | 2016-10-20 | 2017-03-22 | 山东科技大学 | Composite coal seam tunnel head-on impact ground pressure control method |
| CN106401645B (en) * | 2016-11-03 | 2018-03-13 | 河南理工大学 | A kind of deep high stress tunnel pressure relief support control method for coordinating based on drilling release |
| CN106401645A (en) * | 2016-11-03 | 2017-02-15 | 河南理工大学 | Pressure-relief support coordination control method for deep high-stress tunnel based on borehole pressure relief |
| CN107237646A (en) * | 2017-06-28 | 2017-10-10 | 山东科技大学 | The quantitative method for protecting support in large deformation constant resistance supporting grouted anchor bar, anchor cable and tunnel |
| WO2019000907A1 (en) * | 2017-06-28 | 2019-01-03 | 山东科技大学 | Large-deformation constant-resistance anchor bolt and anchor cable grouting support, and roadway quantitative support method |
| CN107237646B (en) * | 2017-06-28 | 2019-04-26 | 山东科技大学 | Large deformation constant resistance supporting grouted anchor bar, anchor cable and tunnel quantify method for protecting support |
| CN109026070A (en) * | 2018-08-20 | 2018-12-18 | 中南大学 | A kind of buried lane cave country rock near field stress regulation and control method |
| CN111075479A (en) * | 2019-12-30 | 2020-04-28 | 天地科技股份有限公司 | Stability control method for surrounding rock of roadway |
| CN111075479B (en) * | 2019-12-30 | 2021-06-15 | 天地科技股份有限公司 | Stability control method for surrounding rock of roadway |
| CN112483098A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and treating rock burst of advanced broken roof of stope |
| CN112483150A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and controlling rock burst of separation layer roadway |
| CN113739983A (en) * | 2021-07-21 | 2021-12-03 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN113739983B (en) * | 2021-07-21 | 2024-01-12 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN115182764A (en) * | 2022-05-12 | 2022-10-14 | 中国平煤神马能源化工集团有限责任公司 | Surrounding rock deformation monitoring anchor rod with high-strength rock burst resistance characteristic |
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