关键词: 数值模拟, FLAC, 极限平衡方法, 边坡优化, 最终边坡角

Abstract: For open mines, the ultimate slope angle will have a great impact on the slope stability, mine production safety and economic efficiency.In light of the requirement of the second expansion phase of an open mine, large non-linear solid-fluid coupling FLAC numerical simulation method was used to analyze several designs of a slope in terms of the indicators such as stress field, destruction field, displacement of monitoring and velocity of displacement, and the conventional limit equilibrium method was used to calculate the factors of safety of the recommended designs for the slope.As a result of comprehensive consideration, an optimal design was made.It is concluded that a combined use of numerical simulation and limit equilibrium methods is a rational and efficient way to get an optimized design of mine slope that is safe, economic and practical.

Key words: Numerical simulation, FLAC, Limit equilibrium method, Slope optimization, Ultimate slope angle