筋带对尾矿坝漫坝破坏过程阻滞作用试验研究

Experimental study on blocking action of bar strip on tailings dam overtopping

为分析筋带在尾矿坝漫坝破坏过程中的阻滞性,基于相似理论和溃决侵蚀原理,进行加筋尾矿坝漫顶破坏模型试验。深入剖析加筋尾矿堆积坝漫顶演化规律和破坏模式,揭示筋带在尾矿坝漫顶破坏过程中的阻滞效应。结果表明:加筋尾矿坝的浸润线上升滞后于未加筋情况;加筋尾矿坝漫坝破坏呈台阶破坏模式;筋带对尾矿坝漫坝破坏发展速度和侵蚀沟深宽有明显的阻滞作用。采取尾矿坝加筋措施能有效防御洪水漫顶溃坝灾害。

For the sake of studying the blocking effect of bar strip on tailings dam overtopping,the similarity theory and principle of burst erosion model were used to establish an evolution model of reinforced tailings dam under the flood condition,and the floating evolution of reinforced tailings dam was analyzed.the evolution law and failure mode of tailings stacking dam were analyzed,and the blocking effect of reinforced belts on overtopping destruction was revealed. The results indicate that rise in the saturation line of tailings dam is delayed by bar strips,that overtopping process of reinforced tailings dam has a steps failure mode,that bar strips have a significant blocking effect on the process of tailings dam destruction and the width of erosion gully,and that the reinforcement measure can be used to prevent effectively dam overtopping disasters.