CN101886546B - Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway - Google Patents
Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway Download PDFInfo
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- CN101886546B CN101886546B CN2010102176310A CN201010217631A CN101886546B CN 101886546 B CN101886546 B CN 101886546B CN 2010102176310 A CN2010102176310 A CN 2010102176310A CN 201010217631 A CN201010217631 A CN 201010217631A CN 101886546 B CN101886546 B CN 101886546B
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- anchor cable
- roof
- drilling
- top board
- roadway
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Abstract
The invention discloses a method for inhibiting roof deformation of a coal mine underground bolt and anchor cable roadway, which is characterized in that tracking drilling is performed on a roof after the roof of a roadway is supported by a bolt and an anchor cable, wherein drilling positions are arranged and spread with a radius of 0.2 to 0.3 meter centering on the bolt and the anchor cable; the distance between holes of the drilling is 0.4 to 0.8 meter; the drilling depth is 1 meter from an upper roof to ensure that not only the anchoring strength of the anchor cable is not influenced but also the deformation of the roof can be effectively inhibited; the drilling angle is parallel with adjacent bolt and anchor cable; and the drilling diameter is the same as the diameter of the anchor cable. The method enhances the pressure resistance of the roof, inhibits the deformation of the roof to the utmost extent, reduces the probability of roof caving, and enhances the safety and the stability of the roadway. The method needs no new equipment and additional pipelines, is simple to operate, prolongs the service life of the roadway, and reduces the maintenance frequency and the maintenance cost of the roadway, the later period input of support materials, and the labor cost. The method is suitable for roadways with a sandstone roof, a composite layer roof and a coal roof.
Description
Technical field:
The invention belongs to a kind of method that suppresses back distortion under the coal mine, particularly a kind of method of utilizing drilling technique to suppress the distortion of top board.
Background technology
In long-term process of coal mining, roadway support is one of mine production most important work, be to enhance productivity and the basic guarantee of mine safety ordinary production, since coal-mining technique improve constantly increasing with mining rate, drift section strengthens, impel digging laneway to speed up to adapt to the fast extraction work of mechanization, from before the supporting of metal frame develop into present anchor shaft anchor cable supporting, great change takes place in support form, the anchor shaft anchor cable supporting improves digging laneway speed greatly, alleviate working strength of workers, weak point is in various degree an appearance roof deformation situation in using anchor shaft anchor cable supporting process, and the generation that causes the roof collapse accident owing to reasons such as distortion are serious.
Because serious phenomenon will appear being out of shape in top board when country rock is unstable, as the composite bed country rock, fault belt, large-section underground triangulation point etc., the capital anchor pole occurs and fractures frequently, roof rock is sent out shortcake, the anchor pole pallet is absorbed in top board, anchor cable breaks, move back lock, draw lots, wire lath bursts, sheet, the piece avalanche, top board pocket goods is serious etc., in the roof deformation process, the pressure quadratic distribution state that the surrouding rock stress of the equilibrium state of tunnel before never digging after dig carried out, anchor shaft anchor cable can not retrain it and expand and the rock stratum shearing changing of the relative positions perpendicular to axial direction the rock stratum vertically, can not retrain the fracture area of roadway surrounding rock, the plastic zone, the elastic region, impel country rock to face space-variant shape and mobile, because the inner acceleration deformation stage that slows down that exists of country rock, the surface, tunnel exists heavily stressed corrosion, sheet, the piece avalanche, structural instability, the reaction tunnel is in unsteady state, remarkable METHOD FOR LARGE DEFORMATION ELASTOPLASTIC has taken place in country rock depths, and the decay of intensity aggravates with distortion, and inner microcosmic carefully sees the joint and dilatation further takes place in the crack, expansion, wherein most cuttings mutually, connect, take place to shear strongly and back and forth rubbing between the inner level rock of country rock, if develop as one pleases, top board then has the backward fruit that collapses.
At above-mentioned situation, generally take following method at present: 1. complement anchor shaft anchor cable increases roadway support intensity.2. set up the metal canopy.Two kinds of methods are the cost height in practice, has high input complex procedures.
Summary of the invention
The objective of the invention is problem according to the prior art existence, a kind of drilling technique method is provided, technology is simple, easy to operate, do not increase equipment substantially, the saving personnel, cost is low, make top board obtain discharging than depths country rock internal energy, high concentrated stress point shifts, and suppresses the too fast purpose of roof deformation thereby reach.Strengthen tunnel safety stability.
Technical scheme provided by the invention is as follows: back carries out tracking drilling to top board after using the anchor shaft anchor cable supporting, and bore position is that radius centered 0.2-0.3 rice begins to arrange expansion with anchor pole, anchor cable, boring distance between borehole 0.4-0.8 rice; 1 meter, the old top of drilling depth distance, the anchoring strength that so neither influences anchor cable can effectively suppress the distortion of top board again; Bore angle is parallel with adjacent anchor shaft anchor cable; Bore diameter is identical with the anchor cable diameter.
Above-mentioned when top board is carried out the tracking drilling operation, back does not have the crack, is shaped, and is smooth, and 50 meters begin the tracking drilling that lags behind after top board has been played anchor pole, anchor cable.
Above-mentioned when top board is carried out the tracking drilling operation, back is shaped bad, and top board has the crack, and tracking drilling is carried out in out-of-flatness immediately after top board has been played anchor pole, anchor cable.
Advantage of the present invention: after adopting the tunnel to use the anchor shaft anchor cable supporting top board is carried out tracking drilling, with the pressure that decomposes and weakening is brought to top board by the quadratic distribution state of tunnel from the equilibrium state to pressure, strengthen the top board anti-pressure ability, suppress roof deformation to greatest extent, reduce the probability of roof collapse, strengthen tunnel safety stability.This method does not need newly added equipment, does not need to establish in addition pipeline, and is simple to operate, prolongs the tunnel useful life, reduces road maintenance number of times and maintenance cost, reduces the later stage of support material and drops into, and reduces cost of labor, has excellent generalization values.This method is applicable to the tunnel of sandstone top board, composite bed top board, coal top board.
Description of drawings
Fig. 1 is a drift section structural representation of the present invention.
Fig. 2 is back supporting state and drill holes schematic diagram.
The specific embodiment
See Fig. 1,2, method provided by the invention is determined two kinds of specific embodiment according to the back rock behavio(u)r:
Sandstone roadway in the roof top board does not have the crack, is shaped, and is smooth.When excavation operation, top board has been beaten anchor pole 1, anchor cable 2 back 50 meters begin the tracking drilling that lags behind, do not influence the normal driving speed of work plane like this, along with moving ahead of heading equipment, bore operation carries out subsequently.3 degree of depth of holing will surpass false roof, directly push up, 1 meter, the old top of distance, the anchoring strength that so neither influences anchor cable can effectively suppress the distortion of top board again, and the layout of boring 3 is the center with anchor pole 1, anchor cable 2, radius N is that 0.2-0.3 rice begins to launch, and distance between borehole L is 0.8 meter.Bore angle is parallel with adjacent anchor shaft anchor cable.Bore diameter is identical with the anchor cable diameter.
Composite bed top board and coal plate forming are bad, top board has the crack, out-of-flatness, when excavation operation, carry out tracking drilling after top board having been played anchor pole 1, anchor cable 2 immediately, 3 degree of depth of holing will be apart from 1 meter, old top, and the layout of boring 3 is the center with anchor pole 1, anchor cable 2, radius N is that 0.2 meter begins to launch, and distance between borehole L is 0.4 meter.Bore angle is parallel with adjacent anchor shaft anchor cable.Bore diameter is identical with anchor cable 2 diameters.
Claims (3)
1. method that is used for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway, it is characterized in that: after back uses the anchor shaft anchor cable supporting, top board is carried out tracking drilling, bore position is that radius centered 0.2-0.3 rice begins to arrange expansion with anchor pole, anchor cable, boring distance between borehole 0.4-0.8 rice; Drilling depth will surpass false roof, directly push up, 1 meter, the old top of distance, and the anchoring strength that so neither influences anchor cable can effectively suppress the distortion of top board again; Bore angle is parallel with adjacent anchor shaft anchor cable; Bore diameter is identical with the anchor cable diameter.
2. the method that is used for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway according to claim 1, it is characterized in that: when top board was carried out the tracking drilling operation, back did not have the crack, was shaped, smooth, 50 meters begin the tracking drilling that lags behind after top board has been played anchor pole, anchor cable.
3. the method that is used for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway according to claim 1, when top board was carried out the tracking drilling operation, back was shaped bad, and top board has the crack, tracking drilling is carried out in out-of-flatness immediately after top board has been played anchor pole, anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102176310A CN101886546B (en) | 2010-07-06 | 2010-07-06 | Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102176310A CN101886546B (en) | 2010-07-06 | 2010-07-06 | Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101886546A CN101886546A (en) | 2010-11-17 |
| CN101886546B true CN101886546B (en) | 2011-12-28 |
Family
ID=43072613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102176310A Expired - Fee Related CN101886546B (en) | 2010-07-06 | 2010-07-06 | Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101886546B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606181B (en) * | 2012-03-19 | 2014-08-20 | 中国矿业大学 | Hyperstatic scour prevention four-dimensional roadway support device and support method thereof |
| CN102777196A (en) * | 2012-08-09 | 2012-11-14 | 大同煤矿集团有限责任公司 | Complementary supporting method of zoom backstopping roadway |
| CN109211180B (en) * | 2018-09-14 | 2021-01-26 | 华北科技学院 | Fully mechanized caving mining roadway surrounding rock deformation stage division and determination method |
| CN114861370B (en) * | 2022-07-05 | 2022-10-04 | 中煤科工开采研究院有限公司 | Design method for roadway anchor rod and anchor cable support in corrosive mine environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3335039C1 (en) * | 1983-09-28 | 1984-10-31 | Klöckner-Becorit GmbH, 4620 Castrop-Rauxel | Rock anchor |
| US6957931B2 (en) * | 2003-07-14 | 2005-10-25 | Slater Bert W | Roof bolt bearing plate and method for an underground mine |
| CN2779066Y (en) * | 2005-03-11 | 2006-05-10 | 中国矿业大学 | Equipment capable of drilling coal bed for pressure relief and reinforcing supports of key positions |
| CN100434655C (en) * | 2003-08-01 | 2008-11-19 | 新汶矿业集团汶南煤矿有限责任公司 | Advanced supporting and protecting technology for cracked top plate of digging operation face |
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
-
2010
- 2010-07-06 CN CN2010102176310A patent/CN101886546B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3335039C1 (en) * | 1983-09-28 | 1984-10-31 | Klöckner-Becorit GmbH, 4620 Castrop-Rauxel | Rock anchor |
| US6957931B2 (en) * | 2003-07-14 | 2005-10-25 | Slater Bert W | Roof bolt bearing plate and method for an underground mine |
| CN100434655C (en) * | 2003-08-01 | 2008-11-19 | 新汶矿业集团汶南煤矿有限责任公司 | Advanced supporting and protecting technology for cracked top plate of digging operation face |
| CN2779066Y (en) * | 2005-03-11 | 2006-05-10 | 中国矿业大学 | Equipment capable of drilling coal bed for pressure relief and reinforcing supports of key positions |
| CN101713290A (en) * | 2009-12-10 | 2010-05-26 | 天地科技股份有限公司 | Method for clearing rock burst of full-mine laneway deep in mine |
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| Publication number | Publication date |
|---|---|
| CN101886546A (en) | 2010-11-17 |
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