At 2:20 am on March 12,2017,a tailings dam collapsed in the northwest corner of the tailings pond in Tonglushan,Daye,Hubei. This disaster involved the failure of about 500000 m3 of tailings mudflow from the tailings pond. Based on the detailed field investigation and related data,the characteristics of the structure of tailings pond,geological environ-ment and the movement of mudflow after dam-break were analyzed. The technology of unmanned aerial vehicles ( UAVs) was used to get the elevation data of the Daye tailings pond and establish the DSM model after dam-break,and a calculation model for the dynamic analysis was built by the software of DAN3D. By comparing with the simulation results of Frictional model, Bingham model and Voellmy model,it is found that the Voellmy model provides the best performance in simulating this process of dam-break,and the simulation results indicate that during the process of dam-break in Daye tailing pond,debris flow move-ment has a duration of about 130 s with the maximum velocity and deposit depth of 20 m/s and 5 m respectively.%2017年3月12日凌晨2时20分,湖北大冶铜绿山铜铁矿尾矿库西北角发生了局部溃坝事故,下泄尾砂泥浆约50万m3.在大冶尾矿库溃坝现场考察和相关数据资料查阅的基础上,分析了该尾矿库的结构特征、地质环境特征与溃坝尾砂运动特征.利用无人机航拍技术获取了大冶尾矿库溃坝后的地貌高程数据并建立尾矿库溃坝后的DSM模型,运用DAN3D软件建立了尾矿库溃坝的动力计算模型.通过对比Frictional模型、Bingham模型及Voellmy模型的模拟结果,认为Voellmy模型可以较好地模拟溃坝全过程.模拟结果表明:大冶尾矿库溃坝过程中尾矿泥石流运动持续时间为130 s,最大堆积深度为5 m,最大运动速度为20 m/s.
展开▼
