Deformation and failure response characteristics and stability analysis of bedding rock slope after underground adverse slope mining

摘要

When mining under bedding rock slopes, bedding landslides are prone to occur. This paper takes the mining-induced bedding rock landslide as the research area. Using a similar simulation experiment method, the effects of underground adverse slope mining disturbance on deformation, failure, and landslide of bedding rock slope were analyzed. The results show that under the influence of underground mining, the physical models exhibited a cantilever-fracture failure mode. Moreover, the deformation, failure, and landslide of the model were basically the same as the prototype landslide, which was a bedding rock landslide of initial traction type and later pushing type. On this basis, the phenomenon and the coefficient of weakening were defined. The stability of mining-influenced bedding rock slopes was studied by the limit equilibrium method. The outcomes indicate that the fractured block was stable after mining. The fractured block B first slid and came into contact with the fractured block A. The interacting pressure caused the fractured block B to push the fractured block A, and the fractured block A locked the fractured block B. Under the sliding extrusion of the fractured block B, the weakening coefficient of the fractured block A quickly weakened until the fractured block A slid. The fractured block B subsequently slipped after losing the resistance slide of the fractured block A. This successive slip process between the fractured blocks A and B obtained through the stability analysis is consistent with similar simulation experiments.