数值模拟与极限平衡法相结合的边坡稳定性分析

摘要

考虑到数值模拟法与极限平衡分析法在岩质边坡稳定性分析中各自的局限性，提出将数值模拟法与极限平衡分析法相结合对岩质边坡进行稳定性分析。以某矿山边坡为例，首先以离散单元法对边坡进行数值模拟，将边坡及其内部的滑动面划分成若干节理单元体，计算出节理单元上的法向和切向应力，根据极限平衡法计算出边坡稳定性安全系数，既考虑了滑动面内应力对岩质边坡稳定性的影响，又通过计算边坡的安全系数来评价边坡的稳定性，具有较好的推广前景。%Considering the limitations of numerical simulation and limit equilibrium method in rock stability analysis,combing numerical simulation with limit equilibrium method to analyze the slope stabili-ty problems.Taking a open-pit slope as an example,firstly,the discrete element method is adopted to con-duct numerical simulation,the sliding surface of the open-pit slope is divided into a number of joint ele-ments to calculate the normal and shear stresses;then,based on the limit equilibrium method to calculate the safety coefficient of the open-pit slope.The research method proposed in this paper not only consider the influence of the stress in sliding surface to the rock slope stability,but also evaluate the stability of the open-pit slope by calculating the safety coefficient,therefore,it has good promotion prospects.