摘要
为了研究渗流场与应力场耦合作用对露天矿边坡稳定性的影响,采用ABAQUS有限元分析软件,建立了渗流-应力耦合控制方程和露天矿边坡有限元模型,对渗流-应力耦合作用下露天矿边坡稳定性进行了研究。结果表明:随着浸水时间的延长,岩石强度逐渐减小,当岩石达到饱和状态时,强度趋于稳定;渗流-应力耦合作用下,边坡位移大于无渗流时,边坡安全系数随坡体渗透系数的下降而减小。在露天矿现场采用以喷射混凝土、预应力锚索为主的支护方案后,监测点深部位移较支护前减小,表明该方案能有效控制边坡位移,降低渗流-应力耦合作用对边坡稳定性的不利影响。
In order to research influence of coupled seepage field and stress field on slope stability of open-pit mine,ABAQUS finite element analysis software was used to establish seepage-stress coupled control equation and finite element model of open-pit mine,and slope stability of open-pit mine was researched under coupled seepage-stress.The research results show that rock strength decreases gradually with soaking time prolonging,but when the rock reaches saturation,rock strength tends to be stable.Slope displacement under coupled seepage-stress is larger than the one without seepage,and safety factor of slope reduces with decrease of permeability coefficient of slope body.In open-pit mine field,deep displacement of monitoring points reduces after a support scheme based on shotcrete and prestressed anchor cable is implemented,which shows that the scheme can effectively control slope displacement and reduce adverse effect on slope stability of coupled seepage-stress.
作者
李柱
谢锋
LI Zhu;XIE Feng(Chongqing Water Resources and Electric Engineering College,Chongqing 402160,China;Traffic Committee of Wulong,Chongqing 408500,China)
出处
《工矿自动化》
北大核心
2018年第12期83-88,共6页
Journal Of Mine Automation
基金
重庆市科委自然科学基金资助项目(cstc2015jcyjA0022)
关键词
露天矿
边坡稳定性
边坡位移控制
边坡安全系数
边坡支护
渗流场
应力场
open-pit mine
slope stability
slope displacement control
safety factor of slope
slope support
seepage field
stress field
