崩塌体运动的全过程模拟及工程应用研究

Simulation on Motion Process of Collapse Mass and Its Engineering Application

基于颗粒流程序,建立颗粒-颗粒之间和颗粒-墙体之间线性接触刚度模型、滑动模型和带滞后阻尼性质的接触模型,对危岩体崩塌各个运动过程进行数值实验,得出一种比较理想的模拟方法和参数选取方法,对于研究含有多种运动形式的危岩体崩塌复合运动有一定的参考价值。结合工程实例,模拟危岩体自脱离边坡坡面到运动终止的全过程,并说明模拟方法的有效性,预测危岩崩塌体的滑落距离和任意位置处的速度,为选取合理的防治措施提供指导。

Linear contact-stiffness model,sliding model and viscous damping contact model are built based on particle flow code,and a numerical experiment is conducted to simulate the motion process of collapse mass.An ideal method of simulation and parameters selection is obtained.It has certain reference value on studying the composite motion of collapse mass which includes several motion types.The whole moving process of collapsing rock is simulated combining a specific engineering and the results prove the efficiency of this simulation method.Sliding distance of collapse mass and the velocity at all position are obtained in this paper which can provide valuable guidance for reasonable prevention measures selection.