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针对协庄煤矿十三煤层开采易受底板承压水威胁的问题,首先根据矿井的水文地质条件,从理论上分析了煤层底板突水的机理;然后由现场观测、经验公式法计算的方法得到十三煤层底板岩体的破坏深度为19.76 m。使用FIAC软件,在有无承压水的情况下分别对长度为40~200 m的工作面进行模拟,取得破坏的深度和范围。最后在此基础上提出了以工作面斜长40 m的条带开采为主,辅以必要的帷幕注浆的防治水技术,使十三煤层的突水系数控制在0.057~0.104 MPa/m,表明该方案有效防止了底板突水。
Aiming at the problem that thirteen coal seam mining in Xiezhuang Coal Mine is threatened by pressure water of bottom plate, the mechanism of water inrush from coal seam floor is theoretically analyzed according to the hydrogeological conditions of the mine. Then, by the method of field observation and empirical formula method, Thirteen seam floor rock mass destruction depth of 19.76 m. FIAC software was used to simulate the working face length of 40 ~ 200 m in the presence of pressure-free water to obtain the depth and range of damage. Finally, based on this, we proposed a water prevention and control technology based on strip mining with an inclined surface length of 40 m, supplemented by the necessary curtain grouting to control the water inrush coefficient of the thirteen coal seam at 0.057-0.104 MPa / m, It shows that the scheme effectively prevents the water inrush from the floor.