基于 UDEC 下溶洞控制危岩体变形过程

摘要

Reveal the rock mass deformation along the karst cave joints by simulating before-rain and after-rain rock mass with UDEC. The con-nection between steep fissure and karst cave leads to a sharp decrease of mechanical property,which further causes the rock mass to slide along karst cave joints. Dangerous rock mass is not stable in rain and shear failure thus occurs along the weak plane.%利用 UDEC 分别对降雨前及降雨后的危岩体进行模拟，显示指出岩体沿溶洞节理方向发生变形；因陡倾裂隙与溶洞贯通，导致力学性能迅速降低，岩体沿着溶洞节理产生了下滑；在降雨条件下，危岩体将处于不稳定状态，沿软弱面发生剪切破坏。