黄土崩塌灾害运动机理及其离散元数值模拟研究

黄土崩塌灾害严重危害人们的生命和财产安全，为了探索黄土崩塌灾害破坏过程，揭示其运动 机理，基于静力学、运动学、能量转化规律、非连续体离散元等理论与方法，利用２Ｄ－Ｂｌｏｃｋ离散元程序对 崩塌体运动过程仿真模拟，从“孕育、发展、变形、危害”全过程分析，研究黄土崩塌灾害“倾倒－坠落－ 撞击－弹射－堆积”的运动机理，包括影响因素、运动过程、危害方式等，推导、获取各演化阶段相关变量 计算公式、参数。

Motion Mechanism and Numerical Simulation of the Loess Collapse

The loess collapses have caused serious damages to people’s lives and property .In order to investigate the process of deformation and damage and reveal the mechanism of the loess collapse , the mechanism of its toppling , falling ,collision ,rebound and accumulation is presented through analysis of formation ,development ,deformation and damage based on Mohr-Coulomb’s failure criterion ,statics ,kinematics ,the law of energy transfer and discrete element method using 2D-Block numerical simulation software to reappear the whole motion process of the collapse ,which com-poses of the start-up condition ,motion equation and destruction form etc .and relevant parameters in evolvement process-es .