尾矿浆体静置及下泄中尾砂沉积规律试验研究  

Experimental Study on the Law of Tailings Deposition in Tailings Slurry Standing and Discharging

作　　者：王亮[1] 王凯 刘星星[1] 盛金昌[1] 胡云进 WANG Liang;WANG Kai;LIU Xingxing;SHENG Jinchang;HU Yunjin(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Survey and Design Institute of Qiantang River Administration Bureau of Zhejiang Province,Hangzhou 310000,China;School of Civil Engineering,Shaoxing University of Arts and Sciences,Shaoxing 312000,Zhejiang China)

机构地区：[1]河海大学水利水电学院,南京210098 [2]浙江省钱塘江管理局勘测设计院,杭州310000 [3]绍兴文理学院土木工程学院,浙江绍兴312000

出　　处：《河南科学》2022年第2期200-207,共8页Henan Science

基　　金：国家自然科学基金(51579078,51679070);浙江省山体地质灾害防治协同创新中心开放基金(PCMGH-2017-Z-02)。

摘　　要：浆体浓度和沉积时间密切影响着尾矿坝溃后浆体的行为机制和成灾规模,是尾矿库溃坝防灾重要的指标参数.通过室内尾矿浆体流动试验探究其浓度和沉积时间对库区浆体沉积固结和下泄沿程沉积规律的影响.试验表明:瞬时溃坝后,库水与细粒尾矿组成泥流率先下泄,较粗粒尾矿逐渐启动下泄,底部粗粒尾矿滞留于库区;浆体浓度和沉积时间越大,尾矿固结度越大,尾矿下泄体积比越小.在流通区,下泄中出现水砂分离现象:水和细粒尾矿快速下泄,粗粒尾矿沿程沉积,沉积深度呈减小趋势;浆体浓度越大,沿程沉积深度越大;库区沉积时间越长,沿程沉积深度越小.The slurry concentration and deposition time of the reservoir area closely impact the behavior mechanism and disaster scale of the slurry after the tailings dam break,and are very important index parameters for the disaster prevention of the tailings dam break.Through the indoor tailings slurry flow test,the effects of mass concentration and deposition time on the deposition consolidation and discharge of slurry along the reservoir area were explored.The test shows that,after instantaneous dam break,the mud flow composed of reservoir water and fine tailings first drained,then the coarse tailings gradually started to drained,and the bottom coarse tailings remained in the reservoir area.With the increase of the concentration and deposition time of the reservoir area are,the consolidation degree of the tailings increases,and the volume ratio of the tailings decreases.In the circulation area,water-sand separation occurs in the discharge:water and fine-grained tailings discharge rapidly,coarse-grained tailings deposit along the way,and the deposition depth shows a decreasing trend.With the slurry concentration increasing,the deposition depth becomes deeper.With deposition time increasing,the deposition depth becomes more shallow.

关 键 词：尾矿浆体流动试验 沉积时间 水砂分离 尾砂沉积规律 

分 类 号：TV649[水利工程—水利水电工程]