永平铜矿露天采场隔离层矿体开采数值模拟研究  

Numerical Simulation on Ore Body Mining in Open-pit Isolation Layer of Yongping Copper Mine

作　　者：孙春辉 李爱兵 潘懿 牛小明 王旭 虎万杰 SUN Chunhui;LI Aibing;PAN Yi;NIU Xiaoming;WANG Xu;HU Wanjie(Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology of Metal Mines,Changsha,Hunan 410012,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012

出　　处：《矿业研究与开发》2021年第12期5-11,共7页Mining Research and Development

摘　　要：以永平铜矿露天采场边坡及露天地下联合开采隔离层为研究对象,采用CAD-Rhino-Flac^(3D)软件耦合建模的手段,对坑底矿体开采进行数值模拟分析。基于数值模拟及边坡稳定性计算结果,综合分析了-38~-50m矿体开采对边坡及隔离层的影响。研究结果表明,该区域矿体开采会降低边坡安全系数,使边坡处于欠稳状态;随着-38~-50m矿体的开采,隔离层的塑性区面积逐渐增大超过屈服极限,应力、位移数值增大,且边坡与隔离层表面出现拉应力。综合考虑,认为该部分矿体开采存在较大安全隐患,建议保留-38~-50m标高段的矿体,不予开采。Taking the open-pit stope slope and the isolation layer in open-pit and underground combined mining in Yongping Copper Mine as the research objects,by means of CAD-Rhino-Flac^(3D) coupling modeling method,the ore body mining at the pit bottom was numerically simulated and analyzed.Based on the numerical simulation and slope stability calculation results,the influence of the mining of-38~-50more body on slope and isolation layer was comprehensively analyzed.The results show that the ore body mining in this area will reduce the safety factor of slope and make the slope in an unstable state.With the mining of-38~-50more body,the plastic area of the isolation layer gradually increases and then exceeds the yield limit,the values of stress and displacement increase,and tensile stress appears on the surface of the slope and the isolation layer.Based on comprehensive consideration,it is found that there are great potential safety risks in the mining of this area of the ore body,so it is recommended to retain the-38~-50more body,without mining.

关 键 词：露天地下联合开采 隔离层 边坡稳定性 数值模拟 

分 类 号：TD862.1[矿业工程—金属矿开采]