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以西冲矿山某一反倾岩质边坡为例,在现场工程地质条件调查的基础上,依据相似原理构建了地震动力作用下边坡失稳物理模拟试验模型。模拟试验水平向峰值加速度为1.025m/s2、竖直向峰值加速度为2.102m/s2、振动持续时间为20s。试验得出,地震力作用下边坡的失稳模式为松动→倾倒→崩塌,边坡的变形部位主要为坡体前缘,竖直向变形量为0.5cm,水平向变形量为0.4cm,边坡前缘出现贯通的破裂面,坡体后缘出现倾倒变形现象。物理模拟结果与UDEC数值模拟分析结果有良好的一致性。
Taking an anti - dumping rock slope in Xichong mine for example, based on the investigation of on - site engineering geological conditions, a physical simulation test model of slope failure under seismic power was constructed based on the principle of similarity. The horizontal acceleration of simulation experiment is 1.025m / s2, the vertical acceleration of peak is 2.102m / s2, and the duration of vibration is 20s. The results show that the failure mode of slope under the action of seismic force is loose → collapse → collapse. The deformation of the slope is mainly the front of slope, the vertical deformation is 0.5cm and the horizontal deformation is 0.4cm. The front of the slope appears through the rupture surface, the slope of the dumping phenomenon occurs. The physical simulation results are in good agreement with the UDEC numerical simulation results.