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结合某受承压水威胁工作面的具体工程地质资料,利用FLAC3D软件强大的流固耦合功能,建立该带压开采工作面的数值分析模型并进行流固耦合数值模拟。通过数值模拟结果,分析不同开挖长度时煤层底板岩层的位移、应力分布规律及含水层承压水在隔水层中的导升高度。结合“下三带”理论,看在承压水作用下,是否存在完整隔水层,以判断工作面在采煤过程中是否会发生突水事故。对承压水上采煤的流固耦合数值模拟具有一定的参考作用。
Combined with the specific engineering geological data which threatens the working face under the pressure of pressurized water, the numerical analysis model of the working face with pressure is established by using the strong fluid-solid coupling function of FLAC3D software and the numerical simulation of fluid-solid coupling is carried out. Based on the numerical simulation results, the displacement and stress distribution of rock strata in coal seams with different excavation lengths and the guide heights of aquifer confined water in the aquifuge were analyzed. Combined with the theory of “the next three belts”, we can see whether there is a complete aquitard under the effect of confined water, so as to determine whether there is a water inrush accident in the coal mining face. It has certain reference function to the numerical simulation of fluid-solid coupling of confined water mining.