Abstract:In the feasibility study stage of underground mine construction project, the engineering analogy method is commonly used to determine the rock movement angle. However, some reconstruction and expansion projects were restricted by the conditions: some protected objects on the surface may most likely fall into the range of rock movement determined according to the engineering analogy method. In this paper, a method of safety evaluation by numerical simulation was provided to evaluate the rationality of the selection of rock movement angle, and it was applied in a case study. The qualitative and quantitative evaluations of the mining movement limit were carried out, and the corresponding safety countermeasures and suggestions were proposed.