基于Rockfall Analyst的滚石运动参数反演及三维轨迹分析
PARAMETE BACKANALYSIS AND 3D TRAJECTORY ANALYSIS OF ROLLING STONE MOTION BASED ON ROCKFALL ANALYST
宗朝正 1吉锋 1陈利鑫1
作者信息
- 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
- 折叠
摘要
崩塌是高陡边坡中常见的一类地质灾害,落石运动轨迹和进行危险性量化评价对崩塌灾害防治具有重要意义.以某灰岩高边坡为研究对象,在对危岩和滚石发育分布特征精细地质调查的基础上,采用Rockfall Analyst反演滚石运动参数,并对边坡上发育的高位危岩进行三维运动轨迹预测.结果表明:(1)研究区岩土坡面滚石运动特征参数分别是法向恢复系数Rn为0.25～0.28、切向恢复系数Rt为0.78～0.82、动摩擦角Fri为20°～25°;(2)落石运动过程中最大速度88.05 m/s,最大弹跳高度29.02 m,最大冲击能量10 857 kJ,大部分与厂房撞击,危险性极高,需要及时治理.研究成果对区域内防灾减灾工程具有一定的参考价值.
Abstract
Rockfall is a common type of geologic hazard in high and steep slopes,and the trajectory of rockfall movement and the quantitative evaluation of hazard are of great significance for the prevention and control of avalanche disaster.Taking a gray rock high slope as the research object,based on the fine geological investigation of the distribution characteristics of hazardous rock and rolling stone development,Rockfall Analyst was used to invert the rolling stone movement parameters and predict the three-dimensional movement trajectory of the high hazardous rock developed on the slope.The results show that:(1)the characteristic parameters of the rolling stone motion on the geotechnical slopes in the study area are normal recovery coefficient Rn of 0.25～0.28,tangential recovery coefficient Rt of 0.78～0.82,and kinetic friction angle Fri of 20°～25°,respectively;(2)the maximum velocity of falling stone during the motion is 88.05m/s,the maximum bouncing height is 29.02m,and the maximum impact energy is 10857kJ.Most of them collided with the plant,which is extremely dangerous and needs to be managed in time.The research results have certain reference value for disaster prevention and mitigation works in the region.
关键词
落石轨迹/滚石运动参数/Rockfall/Analyst/危险性评价Key words
rockfall trajectory/stone motion parameters/Rockfall Analyst/hazard evaluation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据