基于无人机和Rocfall的危岩落石特征分析与运动学模拟研究——以圆宝山隧道出口为例

Characteristic Analysis and Kinematic Simulation of Dangerous Rockfall Based on UAV and Rocfall--Taking the Exit of the Yuanbaoshan Tunnel as an Example

丽香铁路位于云南省西北部,沿线山峦纵横,地形险峻,高山、峡谷、高原、盆地交错分布,地质构造复杂,新构造运动强烈,危岩落石发育。以丽江至香格里拉线的圆宝山隧道出口为研究对象,通过危岩现场地质调查、无人机航测获取影像数据,结合Rocfall软件模拟运动轨迹的技术方法,对潜在危岩体进行分析评价,较好地完成危岩体的地质灾害调查工作。结果表明:运用该方法可以精确查明危岩体的几何特征、空间位置及失稳模式,实现危岩的快速识别,以及得出危岩落石能量、弹跳高度、影响范围等信息,从而对潜在危岩体发育特征及危险性进行分析评价,针对性提出有效的防治措施。研究结论可以为危岩落石的灾害治理、防治设计提供一定的参考依据。

Lixiang Railway is located in the northwest of Yunnan Province,features mountains and steep terrain along the line,staggered distribution of mountains,canyons,plateaus and basins,complex geological structures,strong neotectonic movements,and dangerous rockfalls.Taking the exit of the Yuanbaoshan Tunnel of the Lijiang-Shangri-La Line as the research object,with the help of the image data obtained from the on-site geological survey of dangerous rocks and UAV aerial survey,and the Rocfall software to simulate the trajectory,the potential dangerous rock mass is analyzed and evaluated,and the geological hazard investigation of the dangerous rock mass has been well completed.The results show that this method can accurately identify the geometric characteristics,spatial location and instability mode of dangerous rock mass,realize the rapid identification of dangerous rock,and obtain information such as rockfall energy,bounce height and influence range of dangerous rock mass,so as to analyze and evaluate the development characteristics and danger of potential dangerous rock mass,and put forward effective prevention and control measures.The conclusions of this study can provide a certain reference for the disaster management and prevention design of dangerous rockfalls.