尾矿坝稳定性物理模型试验研究  

On the Physical Model Tests of Tailings Dam Stability

作　　者：张敏哲[1] 金爱兵[1] 王志凯[1] 张院生[1] 

机构地区：[1]北京科技大学土木与环境工程学院

出　　处：《金属矿山》2013年第12期115-117,共3页Metal Mine

基　　金：国家自然科学基金项目(编号:51174014)

摘　　要：以西石门铁矿生产的尾矿砂作为试验材料,通过自行研制的尾矿坝物理模型试验装置,按照室内小比尺堆积尾矿坝模型。加压试验导致坝体内产生高孔隙水压力,而浸润线上升幅度及影响范围较小,表明由于坝体继续堆高引起尾砂液化从而导致坝体失稳的风险不大。坝体位移监测结果表明尾矿坝中部变形最大,该区域为尾矿坝体失稳及采取工程措施的关键部位,坝体稳定存在1个临界高度,当超过其高度会使变形急剧增大,引起坝体失稳。因此在实际工程中应充分重视这一临界高度,并采取相应的工程措施。Taking the tailing sand from Xishimen Iron Mine as test materials,the tailings dam model with indoor small scale was built through self-developed physical model testing device of tailing dam. Pressure tests result in generating a high pore-water pressure in tailing dam but have less effect on the increase and the scope of saturation line,which indicated that there is little risk of dam failure leading to the sand liquefaction due to the continuing piling. The monitoring results on the displacement of tailing dam showed that maximum deformation is located in the middle of the dam,and the region is the key section of the dam failure and taking engineering measures. There exists a critical height for the dam stability. When the dam height exceeds the critical height,the deformation risk will increase sharply,causing the instability of the dam. Therefore,the critical height should be paid full attention in actual projects,and the corresponding engineering measures should be taken.

关 键 词：试验材料 尾矿坝 物理模型试验 稳定性分析 

分 类 号：TV61[水利工程—水利水电工程]