Method for controlling deformation of surrounding rocks of gallery influenced by overhead mining

Abstract

A method to control the country rock distortion of the span mining tunnel adopts high-performance anchor to support on the weak structure of the fillet supporting which is easy to be damaged in the semicircular arch span mining tunnel. The small-bore anchor wires are adopted between the high-performance anchors for encryption supporting. A high-performance anchor with an alpha angle to the horizontal line is set on the tunnel base angle with a distance L1 to the base plate for supporting. An injected anchor is added with a 3-5 array pitch to the anchor and anchor wire supporting for injected supporting. Compared with the existing technology, it improves the safe reliability of the tunnel supporting greatly, eliminates the badly bleeding possibility during the tunnel driving and supporting and improves the quality of the tunnel service, which favors the safe production of the mine. It lightens the workers' working strength, reduces the tunneling cost, increases the mine economic performance, releases the syntaxial problem of mine development preparation and the working-face production and creates conditions for the high-efficient production and the sustainable development of the mine, which has the extensive practicability.

Description

technical field [0001] The invention relates to a method for controlling the surrounding rock deformation of a cross-mining roadway, and is especially suitable for the surrounding rock control of a cross-mining roadway. Background technique [0002] The roadway is an important channel for mining, transportation and ensuring the safe production of coal mines. my country's coal mines excavate more than 10,000 kilometers of roadways every year, of which 70-80% are affected by dynamic pressure, which is a huge underground project. With the continuous development of the national economy, coal will still be the main body of the energy structure for a long period of time in the future, and my country's demand for coal will remain at a relatively high level. Therefore, the proportion of roadways affected by cross-mining will further increase . At present, the surrounding rock control methods adopted at home and abroad mainly include roadway metal support, surrounding rock grouting r...

AI Technical Summary

Problems solved by technology

Although these methods can solve some practical problems on site, under the influence of cross mining, the stress of the surrounding rock of the roadway increases sharply, the plastic zone and the range of the crushing zone of the surrounding rock of the roadway increase significantly, and the roadway is repeatedly damaged during its service period. The disrepair rate is high, requiring constant maintenance or repair, not only the cost of roadway support is high, but also the mining of coal resources is extremely difficult

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