岩土力学2011，Vol.32Issue(5)：1377-1384,1404,9.
尾矿坝垮塌机制与溃决模式试验研究
Model experimental study of collapse mechanism and broken mode of tailings dam
摘要
Abstract
Based on the physical model experiment and the design data of Xiaoda'e tailings impoundment, the course of tailings dam gravitational collapse in flood was modeled with the field tailings.The water system is controlled to model the tailings impoundment to suffer the flood situation, through the technique of side displacement points, water level measurement pipes.stress transducers and digital photography measurement a series of important test data are obtained; such as displacements saturation line, stresses and the broken processes, The mechanism and mode of tailings dam failure in flood are explored.The results indicate that: (1) the character of saturation line change has a time lag of the water level of tailings impoundment; (2) in the processes of the tlood into railings impoundment to the maximum water level of tailings impoundment design data in flood,the horizontal stress incremcnt is larger than that of vettical beside dam slope center, and it is one of the important cause of dam failure; (3) the seepage force, buoyant force,gravity and pore pressure are increased by flood; then the cohesion of tailings dam is weakened and the load of dam is augment; then the stability of tailings dam is reduced; (4) the broken mode of tailings dam performs progressive failure; the failure of tailings dam happened in the toe of the dam and evolved from toe to upstream; it is shown pull-typed behavior, the frilure slippagc faces are composed of multi-arc faces.The model experiment results can provide significant data for deep study the mechanism of collapse and broken mode of such tailings dam in flood.so as to provide useful information for the prevention and control measures in flood disaster.关键词
岩土工程/尾矿库/垮塌机制/破坏模式/模型试验分类
矿业与冶金引用本文复制引用
敬小非,尹光志,魏作安,李小双,王孟来..尾矿坝垮塌机制与溃决模式试验研究[J].岩土力学,2011,32(5):1377-1384,1404,9.基金项目
国家自然科学基金资助项目(No.51074199)I中央高校基本科研业务费资助项目(No.CDJXS10240002) （No.51074199）
重庆大学"211工程"三期创新人才培养计划建设项目(No.S-10220). （No.S-10220）
