Double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation and method thereof

Abstract

The invention discloses a double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation. The double-layer anchor net cable supporting structure is characterized in that secondary anchor net supporting is performed on the basis of primary anchor net supporting, secondary supporting anchor rods (2-2) and primary supporting anchor rods (2-1) are arranged at intervals, the row spacing between the anchor rods is 700-900 mm, the specifications of the secondary supporting anchor rods (2-2) are the same as those of the primary supporting anchor rods (2-1), hollow grouting anchor cables (3) are arranged between the secondary supporting anchor rods (2-2), the interval between the hollow grouting anchor cables (3) is 1000-1500 mm, and the row spacing is 700-1800 mm. According to the supporting structure, the capability of a double-layer anchor net actively supporting shallow part surrounding rock can be brought into full play, the supporting capability of deep part surrounding rock can be improved through the anchor cables, the roadway supporting safety reliability is improved, severe deformation of a mining roadway can be controlled, it can be guaranteed that the supporting structure is continuously effective during the service life of the roadway, the roadway rework times are reduced, and the roadway maintenance cost is reduced.

Description

technical field [0001] The invention relates to a double-layer anchor-mesh-cable support structure and a method thereof for surrounding rock deformation of mining roadways, belonging to the field of coal mine roadway support. Background technique [0002] The strong disturbance caused by coal mining is unmatched by other underground projects such as hydropower chambers and subway tunnels. The strong mining disturbance causes severe deformation of the roadway and even the overall collapse. With the increasingly complex coal mining conditions, the safety control of mining roadways has become an unavoidable technical problem, and its proportion will further increase. [0003] At present, the main methods to control the deformation of surrounding rock in mining roadway are: metal support, surrounding rock grouting reinforcement, anchor net cable support and combined support, etc., and the above support methods have been applied to a certain extent. However, a large number of en...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems in the surrounding rock control technology of the mining roadway, the present invention provides a double-layer anchor net cable support structure and a construction method for controlling the deformation of the surrounding rock of the mining roadway. The integrity and integrity of the surrounding rock can effectively control the deformation of the surrounding rock of the roadway, so that the surrounding rock of the roadway can be kept stable for a long period of time, the construction is simple and convenient, and it has a wide range of practicability

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