Abstract:In order to analyze and study the influence of the mining of the overburdened ore body of the expressway on the expressway, the probability integral method is used to calculate and predict the surface movement and deformation value, and the 3DMine, Midas, FLAC3D and other software are used to carry out the numerical simulation research on the surface movement and deformation caused by the mining of the overburdened ore body of the expressway in Panlong lead zinc mine area, and the theoretical calculation and numerical simulation results are comprehensively analyzed, so as to judge the surface movement and deformation value Whether the mining of overburden ore body will cause the damage of expressway. The results show that the maximum settlement displacement of the surface is directly above the mining center of line 6-10; the maximum slope value, maximum curvature value and maximum horizontal deformation value of the surface calculated by numerical simulation and theoretical calculation meet the requirements of the regulations, and the expressway has not been damaged.