某露天矿坑回填周边渗流场状态及影响研究  

Study on the State and Influence of Seepage Field around Backfilling of Open-pit Mine

作　　者：陈轲 陈文超 王少阳 CHEN Ke;CHEN Wenchao;WANG Shaoyang(Gushan Mining Co.,Ltd.,Anhui Masteel Mining Resources Group;Sinosteel Maanshan Institute of Mining Research Co.,Ltd.;Baotou Steel Group Mining Research Institute (Limited Liability Company))

机构地区：[1]安徽马钢矿业资源集团姑山矿业有限公司 [2]中钢集团马鞍山矿山研究总院股份有限公司 [3]包钢集团矿山研究院(有限责任公司)

出　　处：《现代矿业》2023年第10期104-108,共5页Modern Mining

基　　金：国家重点研发计划项目(编号:2021YFC2900400)。

摘　　要：以姑山露天矿坑回填为研究背景,建立露天矿坑三维地质模型,并采用COMSOL模拟软件进行数值计算,分析不同回填厚度时矿坑渗流场状态以及渗流对露天边坡、地下开采的影响。结果表明:随回填厚度的增加,采场压力分布表现出非对称性;渗流变化主要发生在矿坑底部和矿体中,且渗流速度呈上升趋势;露天边坡逐渐趋于稳定,部分区域需采取加固和监测措施;地下空区应力集中和位移现象更明显,需要采取相应的支护措施,防止变形失稳。Taking the backfill of Gushan Open-pit Mine as the research background,the three-dimensional geological model of open-pit mine is established,and the numerical calculation is carried out by COMSOL simulation software.The seepage field state of the mine and the influence of seepage on the openpit slope and underground mining are analyzed when the backfill thickness is different.The results show that with the increase of backfill thickness,the distribution of stope pressure shows asymmetry.The seepage changes mainly occur at the bottom of the pit and in the ore body,and the seepage velocity is on the rise.The open-pit slope gradually tends to be stable,and reinforcement and monitoring measures need to be taken in some areas.The stress concentration and displacement phenomenon in the underground cavity are more obvious,and corresponding supporting measures need to be taken to prevent deformation instability.

关 键 词：露天矿坑 回填 渗流场 边坡 地下采场 

分 类 号：TD804[矿业工程—矿山开采]