渗流作用下含断层边坡稳定性模拟分析

为了研究含断层边坡在渗流作用下稳定性问题,以伊敏露天矿三采区端帮边坡为研究对象,建立相似材料模型并结合数值模拟,对渗流作用下含断层边坡稳定性进行模拟研究。研究结果表明:断层在坡体中的相对位置对边坡稳定性影响变化显著。断层位于坡体中部时,边坡变形及其剪应力较大,此时断层对边坡稳定性影响最大。随开挖推进坡体逐渐前移,断层附近变形及应力值逐渐减小,断层对边坡影响逐渐减小。开挖不同阶段边坡稳定性主要影响因素不同。开挖前期影响边坡稳定性的主要因素为断层,后期逐渐转化为渗流作用。边坡第五次开挖后在断层和渗流的耦合作用下沿弱面滑移失稳。

Simulation analysis of stability of slope with fault under seepage action

In order to study the stability of slope with fault under the action of seepage, the end slope of the third mining area in Yimin Open-pit Mine was taken as the research object, and the similar material model was established and combined with numerical simulation, the stability of slope with fault under the action of seepage is simulated. The results show that the relative position of faults in the slope has a significant influence on the stability of the slope. When the fault is located in the middle of the slope, the deformation and shear stress of the slope are larger, and the fault has the greatest influence on the slope stability.With the advance of the slope, the deformation and stress near the fault decrease, and the influence of the fault on the slope decreases. The main influencing factors of slope stability in different stages of excavation are different. The main factor affecting the slope stability in the early stage of excavation is the fault, which gradually changes into seepage in the later stage. After the fifth excavation, the slope slipped along the weak surface under the coupling action of fault and seepage.