基于PFC3D的灰岭尾矿库溃坝三维数值模拟研究  

Research on Three-dimensional Numerical Simulation of Dam Break of Huiling Tailings Pond Based on PFC3D

作　　者：朱远乐 赵新勇 王淇萱 刘婷 ZHU Yuan-le;ZHAO Xin-yong;WANG Qi-xuan;LIU Ting(Changsha Mining Research Institute Co.,Ltd.,Changsha 410012,China;State Key Laboratory of Metal Mine Safety Technology,Changsha 410012,China;Hunan Engineering and Technology Research Center for Mine Geological Disaster Prevention and Environmental Reconstruction,Changsha 410012,China;Tongkeng Mining Branch,Guangxi Huaxi Mining Co.,Ltd.,Nandan 547204,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]湖南省矿山地质灾害防治与环境再造工程技术研究中心,湖南长沙410012 [4]广西华锡矿业有限公司铜坑矿业分公司,广西南丹547204

出　　处：《水电能源科学》2023年第8期94-97,共4页Water Resources and Power

基　　金：金属矿山安全技术国家重点实验室开放基金(CKY/YJ202101);湖南省应急管理厅科技专项(2020YJ002)。

摘　　要：为了研究广西灰岭尾矿库溃坝后对下游区域的影响,借助GOCAD与Rhino软件建立符合实际地形的尾矿库区域三维模型,并利用PFC3D三维离散元模拟软件对灰岭尾矿库运行至最终堆积标高+490 m时的状态进行溃坝模拟,分析了尾矿下泄可能淹没的范围、尾矿泥石流影响的区域。结果表明,溃坝后尾矿泥石流演进速度能在较短时间内急速增加到最大值,之后逐渐消减,距坝址越远,尾矿泥石流演进速度消减越快;溃坝演进时间为1100 s时,尾矿最远演进距离为尾矿坝脚1215 m处,下泄体最大宽度约853 m、最大深度约30 m,途中淹没多处敏感点,该研究为尾矿库失事的早期预警、人员疏散和抗洪救灾等提供了决策信息。In order to study the impact of the dam break of the Huiling tailings pond in Guangxi on the downstream region,a three-dimensional model of the tailings pond region conforming to the actual terrain was established with the help of GOCAD and Rhino software.In addition,PFC3D discrete element simulation software was used to simulate the state of dam break when the tailings pond runs to the final accumulation elevation+490 m,and the possible submerged range of tailings discharge and the area affected by tailings debris flow were analyzed.The results show that the evolution rate of tailings debris flow increases rapidly to the maximum value in a short time after dam break,and then decreases gradually.The farther away from the dam site,the faster the reduction of tailings debris flow evolution rate is.When the evolution time of dam break is 1100 s,the furthest evolution distance of tailings is 1215 m at the foot of tailings dam,the maximum width of the drainage body is 853 m,and the maximum depth is about 30 m.In the process,many sensitive points are submerged.The research provides decision-making information for early warning,personnel evacuation and flood relief of tailings pond accident.

关 键 词：尾矿库 溃坝 数值模拟 PFC3D 离散元方法 

分 类 号：TV649[水利工程—水利水电工程] TD926[矿业工程—选矿]