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Rock burst roadway hydraulic support type selection method

A technology of hydraulic support and ground pressure impact, which is applied in the field of mining, can solve the problems of unreasonable selection of roadway support hydraulic support and impact ground pressure roadway, etc., and achieve the effect of increasing the safety factor of the roadway, avoiding casualties, and protecting against failure

Pending Publication Date: 2021-10-15
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention provides a type selection method for rock burst roadway hydraulic support that can effectively solve the problem of unreasonable selection of existing roadway support hydraulic support

Method used

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  • Rock burst roadway hydraulic support type selection method
  • Rock burst roadway hydraulic support type selection method
  • Rock burst roadway hydraulic support type selection method

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specific Embodiment

[0059] In this embodiment, a concrete implementation method of a type selection method for rock burst roadway support hydraulic support provided by the present invention is further described in conjunction with a certain mine engineering example. The 11302 working face of a certain mine mined the 3-1 coal seam, the average thickness of the coal seam is 4.0m, the coal seam layer is stable, and the thickness change is small. The upper 7m of the coal seam is mudstone with a uniaxial compressive strength of 22MPa; the upper 7-24m of the coal seam is sandy mudstone with a uniaxial compressive strength of 25MPa; the upper 24-35m of the coal seam is medium sandstone with a uniaxial compressive strength of 34MPa; The lower part is 10m thick sandy mudstone with a uniaxial compressive strength of 22MPa. The 11302 air return roadway is excavated along the bottom, with solid coal on both sides. The shape of the roadway section is rectangular, and the roadway size width×height=5.5m×3.6m. ...

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Abstract

The invention discloses a rock burst roadway hydraulic support type selection method. The method comprises the following specific steps: 1) determining a rock burst type; (2) obtaining the supporting strength pz required by the roadway hydraulic support through calculation; (3) determining an advanced obvious influence range of stoping of the coal face, and taking the advanced obvious influence range as a supporting range of a roadway hydraulic support; 4) determining the anti-impact performance of the roadway hydraulic support; (5) determining the shape of the roadway hydraulic support; (6) determining the size and the supporting height of a roadway hydraulic support; (7) determining a roadway hydraulic support moving mode; and (8) determining the model and specific support parameters of the roadway hydraulic support. The method is scientific in principle and easy to operate, based on theoretical calculation, on-site mine pressure monitoring data and actual surrounding rock condition analysis, the correct advance support strength and support range can be obtained, the roadway safety coefficient can be increased, a roadway support system is protected against failure by absorbing energy when rock burst occurs, and casualties are avoided.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a type selection method for a hydraulic support in a rock burst roadway. Background technique [0002] With the increase of coal mining depth and mining intensity in my country, the advanced support area of ​​the two lanes in the fully mechanized mining face is affected by mining, and its stress can often reach 2 to 5 times the stress of the original rock, and the deformation and damage of the surrounding rock are serious. Failures are frequent, and it has become a place where accidents such as roof fall and rock burst occur frequently, seriously threatening the lives and property safety of underground workers. Engineering examples at home and abroad show that the roadway hydraulic support has high support strength and high stability, which can improve the safety factor of the roadway, prevent the roadway from being destroyed when the rock burst occurs, and protect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 高学鹏潘一山王伟
Owner NORTHEASTERN UNIV
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