Abstract:In order to study the influence of underground mining on the stability of open pit slope under open-underground combined mining conditions, this paper uses numerical simulation method, combined with the engineering geological conditions and mining methods of the mine to establish a large-scale three-dimensional geological model. Perform calculation analysis. The analysis results show that the roof overburden after a large-scale underground filling mining has a certain degree of subsidence. During the mining and filling process of the ore body, the supporting effect on the overburden is mainly achieved by the surrounding column and the surrounding rock around the panel. After the mining of the underground ore body is completed, the western side of the crater pit is deformed relatively strongly, but the deformation of the area is small. Therefore, large-scale underground filling mining has little effect on the stability of open slopes.