Abstract:To fully recover hanging wall ore resources and ensure safe extraction, the study employs the upward drift filling mining method in the context of rare earth mining in the Sichuan Dalucao rare earth mineral, using high-strength fill to ensure slope stability. This paper employs numerical simulation methods to validate the rationality of the upward drift filling mining method, assesses the degree of slope deformation and displacement under various mining sequences, optimizes the extraction sequence of hanging wall ores, and verifies the stability throughout the mining process. The results show that the safety factor of the open-pit slope decreases from 1.293 to 1.256, which remains within the safe range, and the slope is not prone to large-scale instability. Compared to other mining sequences, Scheme No.2 (region No. 2→region No.1→region No.3) results in the least displacement and deformation, minimally affecting slope stability. Plastic zones form during the mining process, but are limited in size, preventing widespread damage. The research results can provide certain guiding significance and reference value for the safe recovery of hanging wall mines in similar mines.