摘要
尾矿库溃坝造成的危害巨大,为了研究广东省某矿尾矿库的溃坝后果,对其溃坝过程进行模拟。该尾矿库分两期设计,第二期坝在第一期坝的基础上采用下游外推式加高,以该尾矿库为工程背景,根据现场情况取其研究参数,借助FLUENT软件建立尾矿库溃坝过程的三维模型,研究其10~100 s内7个时间段尾砂流的运移距离、流动速度、冲击压力以及对第二期尾矿库稳定性的影响,并根据数值模拟结果制定有针对性的预防和防治措施。研究结果表明:随着时间的增加,尾砂运移距离逐渐增大,流速和压力呈先增大后减小的趋势,尾砂在下泄过程中,离坝址处较近的位置破坏的程度最严重,溃坝从发生至结束历时仅为400 s。尾砂溃坝冲击力巨大且迅速,但数值模拟的结果对实际预防和治理工程具有指导意义,能有效保证尾矿库的安全。
In order to study the consequences of a tailings dam break in a mine in Guangdong,the dam break process is simulated.The tailings dam is designed in two phases.The dam is raised and expanded on the basis of the first phase dam.According to the site conditions of the tailings dam,the research parameters are taken,and the 3D model of the dam break process of the tailings dam is established by using FLUENT software,and the migration distance,flow velocity and impact pressure of the tailings flow in 7 time periods within 10-100 s are studied and the influence on the stability of the second phase tailings dam,then according to the numerical simulation results to formulate the targeted prevention and control measures.The results indicated that as time goes on,the migration distance of tailings gradually increases,and the flow velocity and pressure first increase and then decrease.In the process of tailing discharge,the dam near the dam site is damaged most seriously,and the duration from the occurrence to the end of dam break is only 400 s.The impact force of tailings dam break is huge and rapid,but the numerical simulation results have guiding significance to the actual prevention and treatment engineering,and can effectively ensure the safety of tailings dam.
作者
蒋豪
孙春辉
潘懿
李爱兵
牛小明
王旭
JIANG Hao;SUN Chunhui;PAN Yi;LI Aibing;NIU Xiaoming;WANG Xu(Changsha Institute of Mining Research Co.,Ltd.,Changsha 410012,China;State Key Laboratory of Safety Technology of Metal Mines,Changsha 410012,China)
出处
《中国矿业》
2022年第5期90-99,共10页
China Mining Magazine
