Construction method for weakening zone of floor plate wall rock

Abstract

The invention relates to a construction method in weak wall rock area. Wherein, it arranges stress transfer channel in the channel bottom plate, and loosing explodes at the bottom corner of said stress transfer channel to form one weak wall rock area; via said area, the high developing stress in the upper coal bed can be transmitted into the deep part of wall rock, and the developing stress in the bottom plate can be reduced, to effectively control the bottom drum. The invention has simple process and significant stress reduction effect, with wider application.

Description

technical field [0001] The invention relates to a method for constructing a weakened region of the surrounding rock of the floor, and is especially suitable for controlling the deformation of the floor drum and surrounding rock when coal mine roadways and chambers are affected by upper coal seam mining or other dynamic pressures, and is also suitable for controlling other high-pressure areas. Deformation of surrounding rock in stressed underground engineering. Background technique [0002] When the coal mine roadway is affected by coal seam mining, the mining stress caused in the surrounding rock of the roadway can generally reach 2 to 6 times the stress of the original rock, so it is very easy to cause serious floor heaving in the roadway. For some chambers equipped with large fixed equipment, if a large bottom drum occurs, it will cause the foundation of the fixed equipment to tilt, affect the use of the equipment, and pose a serious threat to the s...

AI Technical Summary

Problems solved by technology

Although these methods can achieve a certain effect of controlling the deformation of the surrounding rock, the effect of controlling the bottom drum is poor, especially in the case of high stress caused by mining, the control effect on the bottom drum is even worse

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