Abstract:The dynamic stability of slopes is a critical concern in mining engineering. This paper aims to analyze the seismic dynamic stability of the slopes at the Panzhihua-Xichang regions open-pit mine using UAV aerial photogrammetry combined with FLAC3D numerical simulation software. High-precision image data was obtained using UAV oblique photogrammetry, and the Midas GTS-NX software was employed to convert the photogrammetric data into mesh files recognizable by FLAC3D. By setting appropriate model parameters, the dynamic response of the slope under seismic conditions was simulated. The results indicate that seismic activity significantly impacts slope stability, with safety factors of 1.289 before and 1.199 after the seismic event. The east slope exhibited substantial displacement and settlement, reaching 62.50mm and 62.59mm, respectively, with plastic zones predominantly concentrated at the slope crest and toe, indicating a landslide risk. Therefore, it is recommended to strengthen routine monitoring and support of the east slope to ensure safe mining operations.
