Study on Deformation and Failure of Mining Slope Under Composite Mining Condition

With the gradual development of mining, the underground mining will destroy the original equilibrium state of the slope and to reduce the stability of slope. On the basis of this, a similar simulation test is used to study the deformation and failure of the mining slope under the composite mining. The results show that: in the case of underground mining and excavating, the initial pressure step, the collapse height, the collapse angle in 4^# seam, and the initial pressure step, the collapse height, the collapse angle in 9^# seam accord with actual project condition. With the increase of the mining length of the 4^# seam, the sedimentation of the internal overburden of the slope is also increased under different force; with the continuous increase of the mining length of the 9^# seam, the subsidence and collapse of the slope are also increased.