降雨对宝日希勒排土场边坡侵蚀的数值模拟  

Numerical simulation of slope soil erosion induced by rainfall in Baorixile dumping site

作　　者：徐朝容 黄赳 王鹏 朱壮壮 邢龙飞 张周爱 XU Chaorong;HUANG Jiu;WANG Peng;ZHU Zhuangzhuang;XING Longfei;ZHANG Zhouai(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Engineering Research Center of Mine Ecological Restoration,Ministry of Education,Xuzhou 221116,Jiangsu,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Shenhua Baorixile Energy Industry Co.,Ltd.,Hulunbuir 021000,Inner Mongolia,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]矿山生态修复教育部工程研究中心,江苏徐州221116 [3]中国矿业大学力学与土木工程学院,江苏徐州221116 [4]神华宝日希勒能源有限公司,内蒙古呼伦贝尔021000

出　　处：《河南理工大学学报（自然科学版）》2019年第5期72-79,共8页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家重点研发计划项目(2016YFC0501107);国家自然科学基金资助项目(51504241,U1710120)

摘　　要：降雨对宝日希勒露天矿排土场产生侵蚀破坏作用,部分排土场边坡产生滑坡,形成侵蚀沟。根据宝日希勒排土场实际情况,利用ABAQUS软件对排土场顶层边坡进行数值模拟,研究不同降雨强度对排土场边坡土壤侵蚀的情况。结果表明:(1)在任何降雨强度下,从降雨初期雨水在排土场边坡就开始入渗,入渗能力下降时便开始形成表层流,表层流对排土场的侵蚀最先发生的位置均位于坡面中部和上部;(2)表层流对坡面侵蚀的时间长度随降雨强度增大而增加,坡面侵蚀程度随着降雨强度增大而加重;(3)暴雨天气时,不同降雨强度对边坡产生破坏的时间不同,随着降雨强度增加,边坡越早受到侵蚀破坏。研究结果可为揭示降雨对排土场土壤的侵蚀规律提供参考。Rainfall caused erosion and destruction on the dumping site of Baorixile open-pit mine,and some dumps created landslides and formed eroded trenches.According to the actual situation of Baorixile,ABAQUS software was used to numerically simulate the top slope of the dumping site to study soil erosion of different rainfall intensity on the dump slope.The results showed that:(1)At any rainfall itensity,rainwater began to infiltrate in the slope of dump-soil site at the beginning of the rainfalls,and the surface flow began to form when the infiltration capacity decreased.The first occurrence of erosion of the surface flow to the dumping site were located at the middle and upper of the slope.(2)The length of surface flow erosion on slope increased with the increase of rainfall intensity,and the degree of slope erosion increased with the increase of rainfall intensity.(3)In heavy rain weather,the damage time of slope was different with different rainfall intensity.With the increase of rainfall intensity,the slope was damaged more quckily.The research results could provide a reference for revealing the law of rainfall on soil erosion in dumping sites.

关 键 词：降雨 土壤侵蚀 表层流 数值模拟 ABAQUS 

分 类 号：P426.615[天文地球—大气科学及气象学] S157.1[农业科学—土壤学]