CN102562037A - Quantitative judging method for damage range of coal mine tunnel - Google Patents
Quantitative judging method for damage range of coal mine tunnel Download PDFInfo
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- CN102562037A CN102562037A CN2012100229647A CN201210022964A CN102562037A CN 102562037 A CN102562037 A CN 102562037A CN 2012100229647 A CN2012100229647 A CN 2012100229647A CN 201210022964 A CN201210022964 A CN 201210022964A CN 102562037 A CN102562037 A CN 102562037A
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Abstract
The invention discloses a quantitative judging method for a damage range of a coal mine tunnel. Drilling construction is carried out on a deformed area of a surrounding rock of the advanced and exhumed tunnel, a drilled hole comprises two tunnel walls and a top plate, and a damaged condition of the surrounding rock of the drilled hole is observed via an observation instrument; and then another hole is drilled until all holes are drilled on a section, so that the damaged range of the surrounding rock of the tunnel at the position is judged. By the aid of the quantitative judging method, a damaged process of a primary stage of the surrounding rock of the tunnel can be observed, accordingly, the tunnel can be supported and reinforced in time, and stability of the tunnel is kept. Instruments in the method are simple and flexile, and the method is used conveniently and is applicable to all tunnels of mines.
Description
Technical field
The invention belongs to the coal mining technical field.
Background technology
Along with mining depth increases, the application of large section roadway production technique; The tunnel is from tunneling to the effect that affords self-structuring, original heavily stressed and dynamic pressure in the process of using; Destruction and stress transfer that country rock occurs; Cause part or large tracts of land supporting to lose efficacy, not only influence support cost, key is to cause potential safety hazard.The common roof accident of China's coal-mine comprises the roof accident in installation of stope equipment and the progradation, three parts of the accident in roof accident in the driving face progradation and the road maintenance process.For the accident in the road maintenance process, the unclear failure degree that reaches supporting that is mainly reflected in the roadway destruction scope does not have quantitative data foundation.
Along with applying of mining depth increase, big mining height mining machinesization, the increase of residing layer position, tunnel, drift section will cause that all roadway deformation destroys the new variation of appearance, and the otherness of damage envelope can be more outstanding, and the time effect of destructive process increases the weight of.Particularly under deep, mining influence, roadway deformation destroys and occurs aggravating phenomenon repeatedly, and collapse dept can be bigger, and supporting is had requirements at the higher level.For the deformation failure in tunnel, reinforce, free notion is wanted in reinforcement, therefore, dynamic observing of roadway deformation damage envelope has important construction value.Therefore need invent a kind of method that quantitatively judges fast and effectively to roadway destruction process and scope under many structures, heavily stressed, the big buried depth condition.
Goal of the invention
The objective of the invention is to present deep mining, high stress areas roadway destruction process and range problem, propose a kind of timely, rapid quantitative decision method.
The technical scheme that the present invention takes is:
The first step: make observation instrument, this observation instrument is made up of expansion capsule, gas tube, aerating device and air pressure observation device;
Concrete preparation method is; At first one with expansion capsule that bore diameter is complementary on be connected a capsule gas tube and boring gas tube; The capsule gas tube communicates with the expansion capsule; The boring gas tube passes expansion capsule and exterior; And respectively the capsule gas tube is connected with aerating device by valve with the boring gas tube again, aerating device is provided with the barometric observation device;
Second step: the zone of distortion occurs at the roadway surrounding rock that tunnels out, carry out drilling construction, the boring position comprises that tunnel two helps and the top board position, and drilling depth surpasses 3.0m;
The 3rd step: the expansion capsule of observation instrument is pushed foot of hole, start aerating device, open valve; Inflation in expansion capsule and boring; At first closely knit shutoff boring after the expansion capsule expands, the gas that boring is interior is blocked and is not leaked, and gas pressure reaches certain numerical value; Stop pressurization; Valve-off, observation gas pressure change situation on the barometric observation device, observation time was controlled at more than 15 minutes; Country rock like this position of no change explanation does not destroy, and vice versa; And then the expansion capsule outwards moved certain distance, and continue inflation observation, by that analogy, until to the position, aperture, thereby obtain the surrounding rock failure situation of this boring; Carry out next one boring then, the boring on this section all finishes, and judges the damage envelope of this place's roadway surrounding rock with this.
Below in conjunction with the mechanism of action of the present invention advantage of the present invention is described: because roadway deformation destroys is a long-term process; In the starting stage; Wall-rock crack occurs, stretch to the tunnel deep regional, different depth occurs around then in the tunnel to destroy by damage envelope among a small circle.Can observe the destructive process of roadway surrounding rock starting stage through the inventive method, thereby in time the supporting reinforcement is carried out in the tunnel, keep the stability in tunnel.Method instrument of the present invention is simple, flexible, easy to use, adapts to all tunnels, colliery.
Description of drawings
Fig. 1 is the observation instrument organigram.
Fig. 2 is a tunnel observation drill holes profile;
Marginal data, 1-expansion capsule, 2-capsule gas tube, the 3-gas tube of holing, 4-valve, 5-aerating device, 6-barometric observation device.
The specific embodiment
Below in conjunction with description of drawings enforcement of the present invention.
One, make observation instrument, this observation instrument is by expansion capsule 1, capsule gas tube 2, boring gas tube 3, valve 4, and aerating device 5 is formed with air pressure observation device 6, and is as shown in Figure 1;
Concrete preparation method is; At first one with expansion capsule 1 that bore diameter is complementary on be connected a capsule gas tube 2 and boring gas tube 3; Capsule gas tube 2 communicates with expansion capsule 1 inside; Boring gas tube 3 passes expansion capsule 1 and exterior, and capsule gas tube 2 is connected with aerating device 5 with boring gas tube 3 again, and aerating device 5 is provided with barometric observation device 6; Be respectively equipped with valve 4 on the gas tube 2 and 3.
Two, occur the zone of distortion at the roadway surrounding rock that tunnels out, carry out drilling construction, the boring position comprises that tunnel two helps and the top board position, and drilling depth surpasses 3.0m, and drill holes is as shown in Figure 2.
Three, the expansion capsule 1 with observation instrument pushes foot of hole, starts aerating device 5, opens valve 4; Inflation in expansion capsule 1 and boring; At first closely knit shutoff boring after expansion capsule 1 expands, the gas that boring is interior is blocked and is not leaked, and gas pressure reaches certain numerical value; Stop pressurization; Valve-off 4, observation gas pressure change situation on barometric observation device 6, observation time was controlled at more than 15 minutes; Country rock like this position of no change explanation does not destroy, and vice versa; And then expansion capsule 1 outwards moved certain distance, and continue inflation observation, by that analogy, until to the position, aperture, thereby obtain the surrounding rock failure situation of this boring; Carry out next one boring then, the boring on this section all finishes, and judges the damage envelope of this place's roadway surrounding rock with this.
Claims (1)
1. coal mine roadway damage envelope quantitative judgement method is characterized in that step is following:
The first step: make observation instrument, this observation instrument is made up of expansion capsule, gas tube, aerating device and air pressure observation device;
Concrete preparation method is; At first one with expansion capsule that bore diameter is complementary on be connected a capsule gas tube and boring gas tube; The capsule gas tube communicates with the expansion capsule; The boring gas tube passes expansion capsule and exterior; And respectively the capsule gas tube is connected with aerating device by valve with the boring gas tube again, aerating device is provided with the barometric observation device;
Second step: the zone of distortion occurs at the roadway surrounding rock that tunnels out, carry out drilling construction, the boring position comprises that tunnel two helps and the top board position, and drilling depth surpasses 3.0m;
The 3rd step: the expansion capsule of observation instrument is pushed foot of hole, start aerating device, open valve; Inflation in expansion capsule and boring; At first closely knit shutoff boring after the expansion capsule expands, the gas that boring is interior is blocked and is not leaked, and gas pressure reaches certain numerical value; Stop pressurization; Valve-off, observation gas pressure change situation on the barometric observation device, observation time was controlled at more than 15 minutes; Country rock like this position of no change explanation does not destroy, and vice versa; And then the expansion capsule outwards moved certain distance, and continue inflation observation, by that analogy, until to the position, aperture, thereby obtain the surrounding rock failure situation of this boring; Carry out next one boring then, the boring on this section all finishes, and judges the damage envelope of this place's roadway surrounding rock with this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022964.7A CN102562037B (en) | 2012-01-12 | 2012-01-12 | Quantitative judging method for damage range of coal mine tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022964.7A CN102562037B (en) | 2012-01-12 | 2012-01-12 | Quantitative judging method for damage range of coal mine tunnel |
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| Publication Number | Publication Date |
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| CN102562037A true CN102562037A (en) | 2012-07-11 |
| CN102562037B CN102562037B (en) | 2015-09-30 |
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| CN201210022964.7A Expired - Fee Related CN102562037B (en) | 2012-01-12 | 2012-01-12 | Quantitative judging method for damage range of coal mine tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900428A (en) * | 2012-09-13 | 2013-01-30 | 焦作市美格安矿业科技有限公司 | Device and method for detecting sealing quality and gas-leakage position of coal seam gas extraction drill-hole |
| CN109655369A (en) * | 2019-01-22 | 2019-04-19 | 山东理工大学 | A kind of engineering rock mass rock integrity and relaxation zone test method |
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2012
- 2012-01-12 CN CN201210022964.7A patent/CN102562037B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN102900428A (en) * | 2012-09-13 | 2013-01-30 | 焦作市美格安矿业科技有限公司 | Device and method for detecting sealing quality and gas-leakage position of coal seam gas extraction drill-hole |
| CN102900428B (en) * | 2012-09-13 | 2015-02-25 | 焦作市美格安矿业科技有限公司 | Device and method for detecting sealing quality and gas-leakage position of coal seam gas extraction drill-hole |
| CN109655369A (en) * | 2019-01-22 | 2019-04-19 | 山东理工大学 | A kind of engineering rock mass rock integrity and relaxation zone test method |
| CN109655369B (en) * | 2019-01-22 | 2021-05-25 | 山东理工大学 | Method for testing integrity and loosening ring of surrounding rock of engineering rock mass |
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| Publication number | Publication date |
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| CN102562037B (en) | 2015-09-30 |
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