Abstract:A simplified model was constructed based on the geological background of a certain open-pit mine. First, limit equilibrium analysis method and SLIDE software were used to analyze the stability of the mining and waste dump slopes. Then, PFC discrete element software and FLAC finite element software were used to establish numerical models, simulating and analyzing the stress distribution, displacement changes, and the process of instability and failure of the waste dump and different sections of the mining slope. The two results are consistent with each other, and the internal mechanism of slope deformation and the law of instability and failure in the waste dump and mining area are obtained. Finally, based on the on-site engineering environment, it is pointed out that the slope of the 1# waste dump is basically stable, while the 2# waste dump is in an unstable state. In the unstable area, monitoring should be strengthened and appropriate reinforcement measures should be taken to prevent significant losses.
