尾矿坝液化流滑破坏模型与稳定措施研究

摘要

The phreatic line is higher at upstream-type tailings dam and most of dams are in saturated state, thus easily leading to flow slide destruction under earthquake. Though analyzing the earthquake disasters of tailings dam, the nechanism of flow slide destroy induced by seismic liquefaction are studied, and the four flow slide destroy models are proposed from aspects of base destroy, initial dam destroy, sub-dam destroy and inside flow destroy. Then the stabilizing measures for liquefaction flow slide of tailings dam and their consolidated effect are discussed. It plays a significant role in guiding the anti-seismic design of tailings dam, improving the level of safety management and reducing the disaster loss.%上游法尾矿坝浸润线较高,大部分坝体处于饱和状态,地震作用下易发生液化流滑破坏.通过分析尾矿坝地震灾害,初步研究了尾矿坝流滑破坏机理,从基础破坏、初期坝破坏、子坝破坏和内滑破坏方面提出了4种流滑破坏模型,探讨了针对尾矿坝流滑破坏的稳定措施及其加固效果.研究成果对指导尾矿坝抗震设计、提高矿山安全管理水平及降低灾害损失具有重要意义.