DEFORMATION MECHANISM AND STABILITY ANALYSIS OF SLOPE UNDER COMBINED MINE

Underground mining under slope can not only cause that the construction of rock mass is destructed and the mechanical properties are reduced,but also lead to that the state of stress is redistributed and affect the deformation and stability of slope greatly.This paper takes the underground mining of B900 under the east slope of the Antaibao open mine as example.Based on the deformation monitoring data,the deformation law and mechanism are summarized.The stability of slope is estimated by the method of stereographic projection analysis,FLAC numerical simulation and limit equilibrium method.Stability evaluation shows that: under the influence of the underground mining,the stability will be reduced,but the overall landslide does not be occurred,the disrupted type of the slope is the sliding collapse.The conclusion is the same to the field practical situation,and can supply reference to similar mining area.