Abstract: Slope stability is directly related to the safety of mine production, and is one of the key factors affecting the economic benefits of mines. In order to explore the stability of the dip slope and guide the optimal design of the mine, taking the current slope of the east side of Yanshan Iron Mine as the re⁃ search object, selecting three representative profiles, comprehensively considering the influence of factors such as rock mass weight, groundwater and blasting vibration，the slope stability of Yanshan Iron Mine is studied by using GEO-SLOPE simulation software. The results show that the overall stability coefficients of the east side slope above -157~-187 m are greater than the limits of the safety factor, the overall stability is good, and the local stability is low. In combination with the current situation that the overall slope stability is good, on the premise of monitoring and controlling the local slope, the angle optimization of the deep rock slope can be further carried out to reduce the boundary pressure and improve the recovery of the side ores.

Key words: slope stability, GEO-SLOPE software, Bishop method