摘要
为探究我国尾矿库因降雨诱发的滑坡风险加剧问题,采用基于全自动人工降雨模拟系统与三维激光扫描技术融合的方法,研究不同降雨条件下(20,40,60 mm/h),尾矿库边坡变形演化特征和规律。研究结果表明:随着降雨时长增加,降雨强度为20 mm/h时,边坡变形呈渐进式发展趋势;降雨强度为40 mm/h时边坡变形呈加速发展趋势,1 h后变形集中区凸显;降雨强度为60 mm/h时边坡变形在前0.5h剧烈响应,后期进入调整稳定阶段。此外,降雨过程中,边坡的变形率随降雨时长的增大展现出线性增长的趋势,且边坡的变形率随降雨强度的增大展现出非线性增长的趋势。研究结果可为边坡变形的安全监测提供科学支撑。
In order to investigate the aggravation of rainfall-induced landslide risk in China’s tailings-dam slopes,a method integrating a fully automatic artificial rainfall simulation system with three-dimensional laser-scanning technology was adopted to study the evolution characteristics and laws of tailings-dam slope deformation under different rainfall conditions(20 mm/h,40 mm/h,60 mm/h).The results demonstrate that with increasing rainfall duration,the slope deformation is spatially uniform and progresses gradually at a rainfall intensity of 20 mm/h.At a rainfall intensity of 40 mm/h,the slope deformation accelerates significantly,with concentrated deformation zones becoming apparent after 1 h.At a rainfall intensity of 60 mm/h,the slope deformation shows a sharp response within the first 0.5 h,and then enters an adjustment and stabilization phase.Furthermore,during the rainfall process,the deformation rate of the slope shows a linear growth trend with increasing rainfall duration,and a nonlinear growth trend with increasing rainfall intensity.The findings provide scientific support for the safety monitoring of slope deformation.
作者
石萍萍
李海港
熊忠航
叶佳文
刘珮勋
SHI Pingping;LI Haigang;XIONG Zhonghang;YE Jiawen;LIU Peixun(School of Safety Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China;Jiangxi Academy of Emergency Management Science,Nanchang Jiangxi 330000,China;Jiangxi Provincial Key Laboratory of Work Safety Risk Monitoring,Early Warning,Prevention and Control,Nanchang Jiangxi 330000,China;School of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)
出处
《中国安全生产科学技术》
北大核心
2025年第11期25-32,共8页
Journal of Safety Science and Technology
基金
国家重点研发计划项目(2023YFC3012200)。
关键词
三维激光扫描
人工模拟降雨
降雨强度
降雨历时
边坡变形
three-dimensional laser scanning
artificial rainfall simulation
rainfall intensity
rainfall duration
slope deformation
