岩层移动模拟研究中模型范围问题的探讨

Based on the key strata theory in ground control and the theory of mining subsidence, how to confirm the models upper boundary in physical and numerical simulation of strata movement were studied through physical modeling experiments and numerical simulation calculations using soft wares FLAC and UDEC. The results show that model upper boundary should be put above main key stratum if there exists key stratum in the model, if not, it will be lead to the distortion of the distribution of load and the simulation result of strata fracture interval; Model upper boundary should be put above water flowing fractured zone if there is not key stratum in the model, if not, it will be lead to the distortion of the simulation result of strata fracture interval and the centralized result of load.