Coal mine tunnel broken two sides anchoring support method

Abstract

The invention discloses a method of crushing anchorage support at two sides of the coal mine roadway and relates to the technology of anchorage support at coal mine roadway. For a long time, the design of anchorage support at roadway depends on experience, which cannot quantificationally determine the parameters of anchorage support and is not suitable for crushing wall rock condition at two sides. The invention first ensures the two crushed sides to form a bearing anchorage body through the function of anchor and net; the ratio between the thickness and height of the anchorage body is more than 1 / 5, then the parameters of anchorage support, anchorage strength, row distance between the anchor, the length of the anchor and the anchorage length, can be determined on the basis of the requirements of bearing ability and the shape of the anchorage body. The invention can quantificationally determine the parameters of anchorage support and solves the difficulty that the anchorage structure can adjust to the great deformation of the roadway, thus the anchorage support is not limited by the size of crushing area at two sides of the roadway and the application range of the anchorage supportis enlarged.

Description

technical field [0001] The invention relates to the anchoring and supporting technology of coal mine roadways, in particular to an anchoring and supporting method under the condition of the surrounding rock where the range of the broken area of ​​the two sides is greater than the length of the bolt. Background technique [0002] Anchorage support has the advantages of less material consumption, less transportation volume, lower construction labor intensity, and large effective section of roadway, etc., and has been widely used in recent years. However, for a long time, the design of roadway anchor support at home and abroad has been stuck in the state of empirical method, there is no reasonable method to quantitatively determine the anchor support parameters, and it is believed that the bolt support method is not suitable for the scope of the two sides of the broken area larger than the anchor Surrounding rock conditions for rod length. However, in many roadways in coal min...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to make up for the deficiencies of the prior art, to provide a method for anchoring and supporting the broken two sides of a coal mine roadway, to realize the quantitative determination of the anchoring and supporting parameters of the broken two sides, to solve the problem that the anchoring structure adapts to the large deformation roadway, and to make the anchoring support It can be used regardless of the size of the crushing area of ​​the two sides of the roadway

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