摘要
为了避免挂帮矿开采过程中露天矿最终边坡失稳现象的发生,以一个大型铁矿区的露天矿为研究背景,构建了露天矿挂帮矿开采边坡稳定性数值计算模型.通过数值计算分析,得出受挂帮矿开采扰动影响,露天矿边坡从采空区所在台阶依次向上发生滑移现象,最大水平移动区域位于挂帮矿开采采空区的上一台阶,逐步向边坡内部和上部台阶减缓,总体移动趋势是由边坡上部台阶和内部向露天矿边坡移动;采空区上部台阶位移规律相似,即随着开采的进行,采空区上部台阶由下至上依次发生位移;受开采扰动影响,采空区顶部形成了不同方向的应力集中现象,这可能会使得边坡内部的覆岩向露天矿采场发生滑移,从而影响边坡的稳定性.
In order to avoid the occurrence of the final slope instability of the open-pit mining process,a numerical calculation model for the slope stability of the open-pit mining was established using open-pit mine in a large iron ore mining area as the research background.By numerical calculation and analysis,it is concluded that:affected by mining disturbance of the hanging side mine,the open pit slope slip upward from the mined-out area in the steps in turn,and the maximum level of mobile area is located in the hanging help mine goaf on a step,gradually slowing down on the inside and upper slope steps;The overall mobile trend is to move from the upper slope steps and the internal of the slope to the open-pit slope;The displacement law of the upper steps in goaf is similar,that is,with the progress of mining,the upper steps in goaf will shift successively from bottom to top.Under the influence of mining disturbance,stress concentration in different directions is formed at the top of goaf,which may cause the overburden in the slope to slip to the open-pit stope,thus affecting the stability of the slope.
作者
赵永岗
章发光
王云
杨晶
李俊鹏
王文才
ZHAO Yonggang;ZHANG Faguang;WANG Yun;YANG Jing;LI Junpeng;WANG Wencai(Bayan Obo Iron Mine,Baotou Iron and Steel(Group)Company,Baotou 014080,China;Mining Research Institute,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《内蒙古科技大学学报》
CAS
2021年第2期134-136,共3页
Journal of Inner Mongolia University of Science and Technology
基金
内蒙古自治区自然科学基金资助项目(2020MS05010)
包头市科技计划资助项目(2019Z3004-8)
包钢(集团)公司白云鄂博铁矿资助项目(SA010020190903B001)
关键词
露天矿
挂帮矿
数值模拟
边坡稳定性
open-pit mine
hang for mine
numerical simulation
slope stability
