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Soft rock roadway bottom board anchoring, grouting and reinforcing method

A technology of floor and roadway, which is used in earth-moving drilling, installation of bolts, mining equipment, etc., can solve the problems of difficult to achieve long-term stability requirements of coal and rock mass on the floor of deep soft rock roadway, small support range and low strength, etc. Achieve the effect of improving the stress state of the floor and the self-supporting capacity of the surrounding rock, a large support range, and a high surface protection strength

Inactive Publication Date: 2019-03-22
SHANDONG ANKE MINE SUPPORT TECH CO LTD +1
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  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an anchoring and grouting reinforcement method for the floor of the soft rock roadway, which overcomes the problems of the existing technology in the deep soft rock roadway floor treatment with small support range and low strength, and it is difficult to realize the deep soft rock roadway floor coal Insufficient long-term stability requirements of rock mass

Method used

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  • Soft rock roadway bottom board anchoring, grouting and reinforcing method
  • Soft rock roadway bottom board anchoring, grouting and reinforcing method
  • Soft rock roadway bottom board anchoring, grouting and reinforcing method

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Embodiment Construction

[0036] In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementation modes.

[0037] An anchoring and grouting reinforcement method for a soft rock roadway floor, comprising the following steps:

[0038] (1) Opening of grouting holes: On the surface of the bottom plate of the roadway 12, bottom plate drillings 13 that penetrate deep into the stable rock formation 16 of the bottom plate are opened, and at least two adjacent grouting holes 13 in the same row of bottom plate drilling holes 13 are used as the bottom plate of the roadway 12 The grouting unit; as an embodiment of the present invention, the grouting unit includes three grouting channels 13 . Among them, the drilling holes can be drilled with large-aperture floor drilling with existing common drilling rigs in coal mines, which not only meets the needs of the reinforcement range of the broken area of ​​the floor, but also facilitates the inst...

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Abstract

The invention relates to a soft rock roadway bottom board anchoring, grouting and reinforcing method. Grouting hole channels going deep into a stable rock stratum are downwards formed in the surface of a roadway bottom board, every at least three adjacent grouting hole channels in the same row of grouting hole channels serve as grouting units of the roadway bottom board, grouting anchor cable bundles are placed in the grouting units, and deep-layer-end anchoring, grouting and fixation and shallow-layer periphery grouting and fixation of the roadway bottom board are respectively executed in each grouting anchor cable bundle. The method overcomes the shortcoming that during deep soft rock roadway bottom board treatment in the prior art, a supporting range is small, the strength is low and the long-term stability requirement of a deep soft rock roadway bottom board coal and rock mass is difficultly met.

Description

technical field [0001] The invention relates to the technical field of mine roadway support, in particular to an anchoring and grouting reinforcement method for the bottom plate of a soft rock roadway. Background technique [0002] Due to the deep burial, high stress level and low strength of the surrounding rock in the deep soft rock roadway, the stress of the surrounding rock should be readjusted to achieve a new balance after the roadway is excavated. Heliangbang adopted anchor net cable, anchor grouting or shed support measures, the integrity and strength of the surrounding rock were maintained, and the deformation of the roadway was controlled. Starting from the bottom drum, it gradually expands to the bottom corner, side, and roof, eventually leading to the failure of the overall support of the roadway. [0003] As the short board of deep soft rock roadway support, floor reinforcement has seriously shortened the service life of the roadway. The importance of floor tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/0026E21D21/0093
Inventor 李建建贺军豪宋晓红徐洪山杨战标赵志坚赵万里
Owner SHANDONG ANKE MINE SUPPORT TECH CO LTD
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