基于PFC^3D和Rockfall的中武山危岩体数值模拟研究  

Study on Numerical Simulation of Zhongwushan Dangerous Rock Mass Based on PFC 3D and Rockfall

作　　者：戎泽鹏 范宣梅[1] 董远峰 杨帆[1] 戴岚欣 冯泽涛 RONG Ze-peng;FAN Xuan-mei;DONG Yuan-feng;YANG Fan;DAI Lan-xin;FENG Ze-tao(State Key Laboratory of Geohazard Prevetion and Geo-environment Protection,Chengdu University of Technology,Chengdu 610059 China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《科学技术与工程》2020年第8期3203-3210,共8页Science Technology and Engineering

基　　金：国家自然科学基金优秀青年科学基金(41622206);国家自然科学基金国际(地区)合作与交流项目(41661134010);国家创新研究群体科学基金(41521002)。

摘　　要：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。Based on particle flow PFC^3D theory and method,the instability process of Zhongwushan dangerous rock masscombined with UAV high-precision aerial image data were predictd and studied.The three-dimensional geological model was constructed by PFC^3D to simulate the collapse,and the movement path of dangerous rock mass was calculated.Six motion profiles were selected based on the simulated motion path,and Rockfall software was used to calculate the two-dimensional motion process.The calculation results of jump height,impact energy and rock velocity were obtained.According to the simulation results of Zhongwushan dangerous rock mass,it can be concluded that PFC^3D 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,thusput forward targeted control measures.The research results have important practical significance for disaster prevention and mitigation projects.

关 键 词：危岩体 崩塌 离散元法 数值模拟 PFC^3D ROCKFALL 

分 类 号：TU457[建筑科学—岩土工程]