Study on the Influence of Multiple Faults on the Stability of High and Steep Slopes in Open-Pit Mines

To study the combined influence of multiple faults on the stability of high and steep slopes in open-pit mines, the finite difference software FLAC3D was applied to analyze the stability of high and steep slopes under the combined influence of four faults in the Tang Ya limestone mine of Gezhouba Xing Shan Cement Co. Combining the current fault development status and the slope instability damage characteristics under the subsequent deep extension mining conditions, the stability of the Tang Ya limestone mine under the combined effect of multiple faults is revealed. The results show that (i) the presence of faults controls the form of slope damage in the Tang Ya open-pit mine, which in turn affects the stability of the slope; (ii) the mechanical cause of slope damage is the fault cutting through the rock mass, resulting in relative slip and extrusion damage due to discontinuous stress transfer between the rock masses; (iii) the impact of mining disturbance on slope damage is small, with the maximum displacement value only increasing from 50.7 to 52 mm, and the plastic zone is never penetrated The maximum displacement value only increased from 50.7 to 52 mm, and the plastic zone was never penetrated.