STUDY ON THE STABILITY DESIGN OPTIMIZATION OF SLOPE EXCAVATION IN AN OPEN IRON PIT

Under the consideration of faults and the influence of ground water, a few plans of slope excavation in an open pit are simulated by means of FLAC (Fast Lagrangian Analysis of Continua) code. Then the stability of each plan is evaluated and the optimization design scheme is selected out. In addition, a new method to judge the stability of slope in prososed regarding to characteristics of speed and displacement variation of monitoring sites concisely in this paper. The result indicates that the method is an effective method for evaludting excavation deformation of slope, especially for comparing stability of slope with the complicated condition (containing fautls and a large number of joint crack). It has good practical nature in the evaluation of slope stability.