金属矿山高速率筑坝尾矿库稳定性分析  

Stability Analysis on High-speed Damming of Tailings Pond in a Metal Mine

作　　者：李洪梁 王立娟[1,2,3,4] 尹恒 马松[1,2,3] 唐梓洋 蒋耀港[1,2,3] LI Hongliang;WANG Lijuan;YIN Heng;MA Song;TANG Ziyang;JIANG Yaogang(Sichuan Academy of Safety Science and Technology,Chengdu,Sichuan 610045,China;Key Laboratory of Measurement and Control of Major Hazard Sources in Sichuan Province,Chengdu,Sichuan 610045,China;Sichuan Technical Support Center of Earthquake and Geological Disaster Emergency,Chengdu,Sichuan 610045,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu,Sichuan 610059,China)

机构地区：[1]四川省安全科学技术研究院,四川成都610045 [2]重大危险源测控四川省重点实验室,四川成都610045 [3]四川省地震与地质灾害应急技术保障中心,四川成都610045 [4]地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《矿业研究与开发》2020年第1期95-102,共8页Mining Research and Development

基　　金：四川省科技厅专项项目(2018GZ0051,2017YSKY0023)

摘　　要：以四川省攀枝花市虹亦钒钛磁铁矿五道沟尾矿库为例,利用无人机摄影测量技术采集数据,建立三维模型,计算其筑坝速率。在此基础上,利用DEM及点云剖面进行表观变形分析,然后利用渗流场模拟计算浸润线分布情况,最后采用极限平衡法耦合分析坝体稳定性。分析结果表明:五道沟尾矿库筑坝速率为24.89 m/a,属高速率筑坝;2期坝体DEM及点云剖面数据基本重合,变形甚微;浸润线埋深明显大于规范要求;采用简化毕肖普法和瑞典圆弧法计算正常运行、洪水运行和特殊运行工况条件下的坝体安全系数均大于规范值,表明五道沟尾矿库在经历高速率筑坝且渗流场达到稳定状态后,在正常运行、洪水运行和特殊运行工况下整体处于稳定状态。Taking Wudaogou tailings pond of Hongyi V-Ti-magnetite mine in Panzhihua,Sichuan Province as an example,the UAV photogrammetry technology was used to collect data,and a three-dimensional model was established to calculate the damming speed.On this basis,the DEM and point cloud profile were used to analyze the apparent deformation,and then the seepage field was used to simulate the distribution of the phreatic line.Finally,the limit equilibrium method was used for coupling stability analysis on dam body.The results showed that,the damming speed of Wudaogou tailings pond was 24.89 m/a,which belonged to high-speed damming.The DEM data and point cloud profile data of the dam body in second phase were basically coincident,with little deformation.The buried depth of phreatic line was obviously greater than the requirements of the specification.The safety coefficients of dam body calculated by simplified Bishop method and Sweden Arc method under normal operation,flood operation and special operation conditions were greater than the specification values.It showed that after high-speed damming and seepage field reaching a stable state,Wudaogou tailings pond was in a steady state under normal operation,flood operation and special operation conditions.

关 键 词：稳定性 高速率筑坝 无人机摄影测量 极限平衡法 尾矿库 

分 类 号：TD228[矿业工程—矿井建设] TD744