水土保持研究2025，Vol.32Issue(4)：18-25,8.DOI:10.13869/j.cnki.rswc.2025.04.030
极端暴雨作用下排土场边坡细沟侵蚀过程模拟研究
Simulation study of rill erosion process of waste dump slopes under extreme rainstorms
摘要
Abstract
[Objective]The stability of dump slopes directly influences mine production and the reconstruction of the ecological environment,and extreme rainstorms are the primary factors contributing to the erosion and instability of slopes.Therefore,it is very important to clarify the rill erosion mechanism of dump slopes under extreme rainstorms.[Methods]Taking Shengli East No.2 open-cast mine dump as the research object,a second-order waste dump model was established based on the similar simulation principle.Artificial rainfall simulation tests were conducted to simulate the rill erosion processes and the rill morphological characteristics on the waste dump slopes under extreme rainstorms(90,120 and 150 mm/h).[Results](1)The rill erosion process was divided into four stages:surface erosion,rill formation,rill development,and rill stabilization.(2)With the increase of rainfall intensity,the rill flow velocity increased by 7.7%to 76.5%,the maximum length and maximum depth of rills increased by an average of 26.7%and 62.0%,and the rill width-depth ratio decreased by an average of 22.6%.(3)The average sediment yield rates of the two rainfall events increased with the rainfall intensity gradient by 93%and 10%,and 52%and 69%,respectively.[Conclusion]The flow velocity and total length of rills show a notable response to rainfall intensity,and the average sediment yield rate is positively correlated with rainfall intensity.关键词
细沟侵蚀/排土场模型/极端降雨/相似模拟原理/产沙率Key words
rill erosion/waste dump model/extreme rainstorm/similar simulation principle/sediment yield rate分类
农业科学引用本文复制引用
王珊珊,吕刚,董亮,李叶鑫..极端暴雨作用下排土场边坡细沟侵蚀过程模拟研究[J].水土保持研究,2025,32(4):18-25,8.基金项目
国家重点研发计划课题(2017YFC1503105) （2017YFC1503105）
辽宁省"兴辽英才人才计划"项目(XLYC2007046) （XLYC2007046）
辽宁工程技术大学双一流学科创新团队建设项目(LNTU20TD-24) （LNTU20TD-24）
