Abstract:In order to realize the recovery and utilization of tailings resources and ensure the safety of tailings ponds in the process of mining. This paper takes the Mapiyi Tailings Pond as the engineering background. Based on the survey and indoor soil test data, the finite element model was established by using the numerical simulation software Midas-GTS/NX, and the three-dimensional static stress field numerical analysis was carried out for its mining process through FLAC3D. The results show that the maximum principal stress and the minimum principal stress are both negative and the maximum shear stress is positive during the mining process, which indicates that the stress is mainly affected by the compressive stress of the dead-weight and has a decreasing trend. The overall displacement of the reservoir area changes with the decrease in the height of the filling dam, but considering the actual construction of the reservoir area mining can be ignored. The tailings pond is in equilibrium during the mining process. When the mining reaches the initial dam crest, the mountain displacement at the side of the tailings pond increases, which means that the monitoring and protection of the mountain around the mining of the tailings pond should be strengthened. The research results provide important theoretical guidance for the recovery of tailings pond resources.