基于PFC3D和Rockfall的中武山危岩体数值模拟研究

基于颗粒流PFC~(3D)理论及方法,结合无人机高精度航拍影像数据,对中武山危岩体失稳过程进行数值模拟方法研究。通过PFC~(3D)构建三维地质模型进行崩塌模拟,计算得出危岩体的运动路径。在模拟的运动路径中选取6个运动剖面,采用Rockfall软件进行二维运动过程计算,得出腾跃高度、冲击能量、岩块速度等计算结果。中武山危岩体模拟结果表明,PFC~(3D)三维运动模型结合Rockfall软件的数值模拟方法,可较好地模拟危岩体的失稳运动过程。研究方法相比以往研究具有更好的可视化特性,研究得到的相关参数可为后续灾害防治工作提供参考,进而可提出有针对性的治理措施。研究结果对防灾减灾工程具有重要的现实意义。

Study on Numerical Simulation of Zhongwushan dangerous rock mass based on PFC3D and Rockfall

Based on particle flow PFC3D theory and method, combined with UAV high-precision aerial image data, the paper predict and study the instability process of Zhongwushan dangerous rock mass. The three-dimensional geological model is constructed by PFC3D to simulate the collapse, and the movement path of dangerous rock mass is calculated. Six motion profiles are selected based on the simulated motion path, and I use Rockfall software to calculate the two-dimensional motion process. The calculation results of jump height, impact energy and rock velocity are obtained. According to the simulation results of Zhongwushan dangerous rock mass, it can be concluded that PFC3D three-dimensional motion model combined with Rockfall software can better simulate the unstable movement process of dangerous rock mass. Compared with previous studies, this study has better visualization characteristics. The parameters obtained from the study can provide reference for the follow-up disaster prevention and control work, and then can put forward targeted control measures. The research results have important practical significance for disaster prevention and mitigation projects.