Rockfall trajectory and kinetic energy distribution are the main components of rockfall research. In many cases, limited by site conditions, field experiments cannot be conducted adequately, so numerical simulation is necessary. This paper investigates the rockfall hazard on a slope in Yuanyang city, Dalian, China. Field experiments, ROCFALL software simulation and a secondary development simulation based on the discrete element method (DEM) were used to obtain the kinetic characteristics of ten rock blocks on four profiles. Comparing the results of two simulation methods with the field experiments shows that the DEM simulation is more accurate and comprehensive. According to the simulated trajectory and kinetic energy distribution of rockfalls, the area influenced by rockfalls is obtained, and a flexible barrier is selected as the protection measure. Therefore, DEM simulation is an effective means to study rockfall movement and can serve as the basis for the design of safety engineering.

落石轨迹和动能分布是落石研究的主要内容。在许多情况下，受现场条件的限制，无法充分进行现场实验，因此必须进行数值模拟。本文研究了大连远阳市某斜坡的崩塌危害。利用现场试验，ROCFALL软件仿真和基于离散元方法（DEM）的二次开发仿真来获得四个剖面上十个岩石块的动力学特征。将两种仿真方法的结果与现场实验进行比较表明，DEM仿真更加准确和全面。根据模拟的落石轨迹和动能分布，得到了落石影响的面积，选择柔性屏障作为防护措施。因此，DEM仿真是研究落石运动的有效手段，可作为安全工程设计的基础。