深凹露天坑排尾砂后地下采区稳定性分析  

Stability Analysis of Underground Mining Area after Tailings Backfilling into Deep Sunken Open Pit

作　　者：刘斌[1,2,3] 侯大德[1,2,3] 孙国权[1,2,3] 

机构地区：[1]中钢集团马鞍山矿山研究院有限公司,安徽马鞍山243000 [2]金属矿山安全与健康国家重点实验室,安徽马鞍山243000 [3]华唯金属矿产资源高效循环利用国家工程研究中心有限公司,安徽马鞍山243000

出　　处：《金属矿山》2016年第3期30-34,共5页Metal Mine

基　　金："十二五"国家科技支撑计划项目(编号:2012BAB14B01)

摘　　要：鲁南矿业王峪矿段深凹露天矿闭坑后,由于矿区尾矿库的库容不足,提出了露天坑底部排放尾砂的工艺。通过ABAQUS大型有限元数值软件,模拟了露天坑采结束—坑底干排尾砂—露天转地下第一阶段采矿全过程,分析了露天边坡位移变化趋势以及露天转地下采区的应力分布情况,得出结论:露天坑底排尾砂后地下开采区域应力场没有明显的增加,同时围岩体的塑性区域没有贯通;原露天边坡的水平与竖直位移均在可控范围内。并针对露天转地下过程中坑底积水情况,提出了工程上的防排渗措施,具有较好的工程参考价值。After closing the deep sunken open pit of Lunan Mining Company,the technique of tailings backfilling into open pit is proposed to face with the insufficient storage capacity of the tailings pond. ABAQUS definite element numerical software is used to simulate the end of the open pit mining,dry tailing dumping at bottom,and the first phase mining of transiting from open pit to underground. The changing trend of open pit slope displacement,as well as the stress and strain distribution of mining area during transition from open-pit to underground is analyzed. It is concluded that the stress and strain of underground mining area has no obvious increase after the tailings backfilling into the bottom of open pit. Meanwhile,plastic zone of surrounding rock is not well run through. The horizontal and vertical displacements of the open-pit slope are under control. In view of water accumulation at pit during transition from open pit to underground mining,the water seepage and prevention measures are put forward,which have a better engineering reference value.

关 键 词：深凹露天坑 坑排尾砂 ABAQUS 稳定性分析 

分 类 号：TD862[矿业工程—金属矿开采]