水利学报2024，Vol.55Issue(6)：735-743,9.DOI:10.13243/j.cnki.slxb.20230776
排渗失效下尾矿库溃坝三维模型试验研究
3D model test study on dam-break of tailings pond under drainage failure
摘要
Abstract
In order to overcome the influence of the 2D test tank edge wall effect on the seepage direction and fail-ure position of the seepage failure mode of tailings pond,a tailings pond is taken as a prototype and conducts a model test study of tailings pond dam break induced by the failure of drainage facilities based on a self-designed 3D tailings pond dam failure model test platform.The failure mode and mechanism of the tailings pond are revealed.The results show that:(1)the dam break caused by drainage failure presents a gradual and sudden outburst evolu-tionary pattern consisting of local soil flow failure,cumulative deformation of dam body,deep sliding surface de-velopment,and overall sudden instability.(2)The significant change in pore water pressure is a key response indi-cator for seepage failure of the dam body.It indicates that the dam body will transform from part scattered softening,soil flow,and collapse at the front and rear edges of the sliding body to large-scale collapse in a short period of time,and can serve as a precursor to dam break accidents.(3)The process of tailings dam break induced by the failure of drainage facilities has the characteristics of gradual and sudden changes.The process of scattered softening and soil flow failure takes a long time,and the time for deep sliding and collapse is very short,which can provide reference for the treatment of seepage damage hazards and emergency response to dam collapse in tailings ponds.The research results have important practical significance for the prediction and control of tailings dam failures.关键词
尾矿库/模型试验/孔隙水压力/流土破坏/坝体溃决Key words
tailings pond/model testing/pore water pressure/soil flow failure/dam collapse分类
建筑与水利引用本文复制引用
张力霆,马文君,刘雅帆,张少雄,周玎,李鑫..排渗失效下尾矿库溃坝三维模型试验研究[J].水利学报,2024,55(6):735-743,9.基金项目
河北省重点研发计划项目(20375409D) （20375409D）
中央引导地方科技发展资金项目(236Z5405G) （236Z5405G）
