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Three-anchor coupling supporting method for high stress tunnel break wall rock

A coupling support and high-stress technology, which is applied in the direction of temporary shield, earthwork drilling and bolt installation, etc., can solve the problem that the anchor net cable or anchor-grouting support cannot meet the stability requirements and affect mine safety production and economic benefits Improvement and other issues, to achieve the effect of wide practicability, strong stability and strong operability

Inactive Publication Date: 2005-11-09
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of roadway adopts traditional U-shaped steel support, anchor mesh cable or anchor grouting support, which cannot meet the stability requirements, which seriously affects the safety of mine production and the improvement of economic benefits.

Method used

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  • Three-anchor coupling supporting method for high stress tunnel break wall rock
  • Three-anchor coupling supporting method for high stress tunnel break wall rock
  • Three-anchor coupling supporting method for high stress tunnel break wall rock

Examples

Experimental program
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Embodiment Construction

[0014] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0015] The three-anchor coupled support method of the high-stress roadway fragmented surrounding rock of the present invention, according to the actual situation on site, firstly analyzes the deformation and failure of the roadway surrounding rock through the investigation and actual measurement of the damage status of the roadway in the complex structure area and the deep-buried high-stress broken surrounding rock roadway Characteristics and failure mechanism; using the surrounding rock loose circle support theory, using the measured surrounding rock loose circle value, determine the technical parameters a, b, c, α, β, L 1 , L 2 , L 3 , L 4 And the grouting parameters; in the construction process, the small section is excavated first and the roof is supported. The anchor bolt spacing of the small section roof support is a, and a=70cm is selected; a prope...

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PUM

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Abstract

This invention is a three-anchor-coupling supporting method for high stress tunnel break wall rock. Small section digging is used, roof deformation is controlled by reinforce the support of roof plate to lighten the stress concentration of two sides coal bodies. Pressure relief holes that allow wall rock to deform and damage are drilled on both sides to release the high stress in wall rack, then construction of big brush and consolidation is done. Roof and bottom angles are reinforced support in stress releasing course to effectively control deformation and damage of tunnel roof for stabilizing wall rock. bolt-spray supports anchor cable consolidation and anchor inject support in coal road and soft rock supporting is combined as one piece. Its coupled relation is fully exerted and the support problem of conforming complicated area and deep buried high stress cracking wall rack or soft tunnel. Its stability is strong, operability is strong, it is safe and reliable can meet the stability needs of roadway in complicated conditions.

Description

technical field [0001] The invention relates to a three-anchor coupled support method for high-stress roadway fragmented surrounding rock, and is especially suitable for support in complex areas of mines and deep-buried high-stress fragmented surrounding rock or soft rock roadways. Background technique [0002] At present, roadway support in areas with complex structures and deeply buried high-stress surrounding rocks has become a prominent problem in production. This type of roadway adopts traditional U-shaped steel support, anchor mesh cable or anchor grouting support, which cannot meet the stability requirements, which seriously affects the safe production of the mine and the improvement of economic benefits. Contents of the invention [0003] The object of the present invention is to provide a three-anchor coupled support method for high-stress roadway fragmented surrounding rock with anchor-spray support, anchor ca...

Claims

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Application Information

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IPC IPC(8): E21D20/00
Inventor 靖洪文陈坤福韩立军许国安
Owner CHINA UNIV OF MINING & TECH
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