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Method for supporting overall arch body of underground roadway

An integrated technology for underground tunnels, applied in tunnels, shaft equipment, shaft linings, etc., can solve problems such as the inability to meet the safety requirements of tunnel roofs

Active Publication Date: 2021-06-18
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The rock condition of the mining roadway in the ore area under the Meishan Iron Mine is relatively stable, and the method of plain sprayed concrete can basically meet the safety requirements of the roof, but in areas with relatively poor rock conditions such as the mining retreat road and the air inlet and return roadway at the edge of the mine, The support method of ordinary plain sprayed concrete cannot meet the safety requirements of the roof of the roadway. Therefore, a new solution is urgently needed to solve the above technical problems

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, a method for supporting the integral body of an underground roadway, said method comprising the following steps:

[0020] Step 1: Complete the inspection of the pumice on the roof of the roadway crushing area. You can use high-pressure air or high-pressure water to pry and check all the obvious pumice on the roof, the cracked sliding layer, and the slag in the broken cracks to prevent the pumice from being hidden in the In the support layer in the later stage, hidden dangers of support are eliminated;

[0021] Step 2: Spray a layer of concrete with a thickness of not less than 5cm from the bottom corner of the roadway along the two sides to the roof in the cleaned roadway, as a temporary support, and maintain it for 7 days. When encountering cracks and broken areas, concrete should be used to cover The crack area is filled and enriched, and the concrete technical requirements: the compressive strength is not less than C20, the slump is 100-150mm, and the r...

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Abstract

The invention relates to a method for supporting an integral arch body of an underground roadway, and provides the method for supporting the integral arch body of the underground roadway with high-strength anchor rods, specially-made U-shaped hooks and meshes, which is mainly suitable for areas with poor rock conditions, such as underground side part retreat ways, air inlet and return ways and the like. The supporting effect of the top slope of the roadway with the broken and poor rock conditions can be effectively improved, and the safe production environment of a mining area is improved.

Description

technical field [0001] The invention relates to a support method, in particular to a support method for an integral wall of an underground roadway, and belongs to the technical field of underground roadway support. Background technique [0002] The rock condition of the mining roadway in the ore area under the Meishan Iron Mine is relatively stable, and the method of plain sprayed concrete can basically meet the safety requirements of the roof, but in areas with relatively poor rock conditions such as the mining retreat road and the air inlet and return roadway at the edge of the mine, The support method of ordinary plain shotcrete cannot meet the safety requirements of the roof of the roadway. Therefore, a new solution is urgently needed to solve the above technical problems. Contents of the invention [0003] The present invention is aimed at the problems existing in the prior art, and provides a method for supporting the integral wall of the underground roadway. The me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10E21D20/00E21D20/02E21D21/00
CPCE21D11/00E21D11/10E21D11/107E21D20/021E21D20/003E21D21/002E21D21/0026E21D21/0086
Inventor 许志逞
Owner NANJING MEISHAN METALLURGY DEV
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