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针对寺河矿3~#煤层带压开采问题,选取W2302综采工作面为工程背景,进行底板破坏深度研究。采用现场压水试验方法,对该工作面底板破坏规律进行采前、采后全过程实测,利用FLAC~(3D)数值模拟软件,对底板破坏深度和型态进行了数值仿真。研究结果表明:现场实测该工作面采后底板最大破坏深度为17.8 m;数值模拟底板破坏最大破坏深度为20 m,二者结果基本相吻合。
In view of the pressure mining of seam 3 ~ # coal seam in Sihe Mine, W2302 fully mechanized coal mining face is selected as the engineering background to study the failure depth of bottom plate. The on-site water pressure test method was used to analyze the failure pattern of the floor of the working face before and after the mining. The FLAC ~ (3D) numerical simulation software was used to simulate the failure depth and shape of the floor. The results show that the maximum failure depth of the working face after mining is 17.8 m measured on site and the maximum failure depth of the bottom failure is 20 m, which basically agrees with the result.