摘要
为探究尾矿坝漫顶渐近破坏侵蚀特征,基于泥沙动力学理论,研制含砂水流条件下尾矿侵蚀试验装置;采用透明亚克力板制作的水平管观察尾矿试样被侵蚀前后的高度变化,通过变频器无级变速水流,同时采用游标卡尺、高速摄像机记录试样侵蚀前后的侵蚀高度及侵蚀时间;采用研制的侵蚀试验装置测量不同质量分数(0%、3%、6%、9%)含砂水流作用下尾矿侵蚀速率,分析含砂水流及流速对尾矿的侵蚀特征。结果表明:尾矿侵蚀速率在清水作用力下最大,且随水流中含砂量的增加而减小,该结论与前人研究成果相吻合,证明该试验装置具备一定的可行性和有效性。
In order to explore gradual failure and erosion characteristics of overtop of tailing dam,a tailing erosion test device under sand flow was developed based on dynamic theory of sediment.Then,height change of tailing sample before and after erosion was observed with horizontal pipe made of transparent acrylic plate,and water flow was continuously changed through frequency converter.Meanwhile,erosion height and time of sample before and after erosion were recorded with Vernier caliper and high-speed camera.Finally,erosion rate of tailings with different mass fraction(0%,3%,6%,9%)was measured with test device,and erosion characteristics of sand bearing water flow and velocity on tailings were analyzed.The results show that erosion rate of tailings reaches its maximum under action of clean water,and it will decrease along with increase of sand content in water flow.This conclusion is consistent with previous research results,which verifies feasibility and effectiveness of the test device.
作者
蔡海
巫尚蔚
吴冬明
敬小非
王文松
康钦容
CAI Hai;WU Shangwei;WU Dongming;JING Xiaofei;WANG Wensong;KANG Qinrong(College of Safety Engineering,Chongqing University of Science&Technology,Chongqing 401331,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400030,China;Xingfa School of Mining Engineering,Wuhan University of Technology,Wuhan Hubei 430074,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第11期162-167,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51974051,51804222)
重庆市基础与前沿研究计划项目(cstc2018jcyjAX0231)
重庆科技学院自制教学仪器设备项目(ZZSB2019013,ckhqzz2008005)
重庆科技学院科技创新项目(YKJCX1820703)。
关键词
含砂水流
尾矿
侵蚀速率
试验装置
含砂量
sand bearing water flow
tailings
erosion rate
test device
sand content
