中文摘要：

采用自行研制开发的尾矿坝溃决破坏模拟试验装置,以云南玉溪矿业有限公司所属的一尾矿库设计资料为依据,对不同高度尾矿坝瞬间全溃后泥浆流态演进规律及动力特性进行模拟试验研究,探讨泥浆在下游区域流动过程中的冲击力强度、淹没范围以及演进规律。试验结果表明：（1）尾矿坝溃坝特性同普通水坝溃坝及典型泥石流运动特性有着本质性区别。（2）溃坝高度对下游泥浆淹没高程有明显影响。泥浆在下游的最大淹没高程总体上随着冲击距离的增大呈递减趋势。（3）泥浆在运动过程中遇到弯形沟道时,因离心力的作用在凹岸出现侧向爬高现象。（4）在泥浆流动过程中,各过流断面处冲击力过程曲线前端较陡直,后端较平滑,最大值出现在泥深峰值到来之前。（5）随着尾矿坝高度的增加,溃决泥浆在下游的最大淹没高程和冲击力强度都呈递增趋势,泥浆到达同一建筑物处的时间缩短,从而加重了溃坝对下游的灾情。研究成果为尾矿坝溃坝泥浆演进规律及动力作用的深入认识以及溃坝灾害的预防和控制提供了参考。

英文摘要：

Based on self-developed large-scale simulation test system of tailings dam-break and the design data of tailings pond belonging to Yuxi Mining Co.,Ltd. in Yunnan Province,the hydraulic characteristic and dynamical effect of slurry after tailings dam-break are simulated by simulation test. The results show as follows：（1） There are some essential distinctions of movement characteristic between tailings dam-break and normal reservoir failure or typical debris flow;（2） The height of tailings dams has a significant effect on inundated height of slurry in downstream,and the peak of submerged height of slurry after tailings dam-break decreases with the increasing impact distance of slurry;（3） When the slurry barges up against bend groove,there is a climbing phenomenon at the concave bank by centrifugal force;（4） In the process of the slurry flowing,the characteristics of slurry impact force curves in each cross section of downstream presents the front-end steeper and the back-end relative smoother,and the peak value has arrived before peak of slurry height;（5） As the tailings dam height increases, the peak submerged height and the impact force strength show increasing trends,and the time of slurry arriving at the same section in downstream is contraction. So the disaster of downstream is more seriously. The results can provide some references to study the characteristics of slurry evolution and impact force strength deeply,and also can guide the mining enterprises to prevent and control the disaster of tailings dam-break.