尾矿坝坝基管涌砂槽模型试验研究  

Experimental Studies on Flume Model of Piping in Foundation of Tailings Dam

作　　者：魏勇[1] 潘红洁[2] 郭利杰[3] 

机构地区：[1]西南科技大学环境与资源学院 [2]东北大学资源与土木工程学院 [3]北京矿冶研究总院

出　　处：《金属矿山》2011年第8期140-142,168,共4页Metal Mine

基　　金："十一五"国家科技支撑计划项目(编号:2006BAK04B01);西南科技大学博士基金项目(编号:11ZX7116)

摘　　要：以沈阳浑南矿业公司的尾矿砂作为物料,针对尾矿坝堤基进行了管涌机理的砂槽模型试验研究,观察并分析了管涌发生、发展并导致溃堤的机理和过程。试验结果表明,管涌破坏发生在弱透水层的顶部,低于临界水头时,管涌仅在一定范围内发展并最终停止,管涌通道不会与江河水连通,一旦超过临界水头,管涌通道持续发展并最终与江河水连通,连通管流的强力冲刷最终导致堤基整体破坏和溃堤。同时,在坝基厚度改变情况下,分别探索了渗流量、砂环直径、测压管水头、管涌破坏时间等的变化规律。Taking tailing sand from Shenyang Hunnan Mining Corporation as raw materiel,the flume model tests on the piping mechanism were conducted to observe and analyze the mechanism and whole development processes from piping generation,developing,and dam failure in view of the foundation of tailings dam.The experimental results showed that piping failure occurred at the top of the weak permeable layer.Piping extends only to a limited area and will stop when hydraulic head is lower than the critical value.There,the piping is not connected with rivers.Otherwise,if hydraulic head exceeds the critical value,piping will propagate persistently towards rivers and the strong rush in piping finally results in failure of the whole foundation.Meanwhile,in the case of the change of foundation thickness,the law of seepage amount,sand ring diameter,piezometric head,piping breach time etc were respectively explored.

关 键 词：尾矿坝 坝基 管涌 模型试验 

分 类 号：TV649[水利工程—水利水电工程]