摘要
为了研究西北某铜锌矿开采由崩落法向充填法过渡时采场预留隔离矿柱厚度对开采作业的影响,根据矿区开采现状以及工程地质条件,设计6种隔离矿柱厚度方案,通过3Dmine-Rhinoceros建立三维数值模型,并引入安全系数概念与单元安全度理论,运用FLAC^(3D)对上部中段采空区未充填条件下210 m中段3个连续矿房间隔开采过程进行模拟计算,研究分析了不同方案下矿山开采后隔离矿柱的顶板沉降位移、安全系数以及单元安全度变化。结果表明,当隔离矿柱厚度大于12 m时,能够满足过渡阶段采场留设层的稳定性要求。因此,建议留设厚度不小于12 m的隔离矿柱。
In order to explore influence of the thickness of barrier pillars reserved in stopes on mining operation during the transition from mining with caving to mining with backfilling in a copper-zinc mine in northwest China,six thickness schemes were selected for the barrier pillars in the stope based on the mining status and the engineering geological conditions.Then,a three-dimensional numerical model was constructed with 3Dmine-Rhinoceros,and factor of safety and zone safety were adopted in the analysis.As for the mind-out area without backfilling in the middle section of upper part,three continuous stope interval mining on the level of 210 m was calculated based on simulation with FLAC^(3D),and the changes in roof settlement deformation,factor of safety and zone safety were also analyzed for the barrier pillars left with different thickness after mining.It is found that with the barrier pillars of 12 m in thickness,the stability of stope can be ensured during transition of mining.Thus,it is recommended that the thickness of reserved barrier pillars be no less than 12 m.
作者
苏成哲
纪帅杰
张殿明
SU Chengzhe;JI Shuaijie;ZHANG Dianming(Lanzhou Engineering&Research Institute of Nonferrous Metallurgy Co.,Ltd.,Lanzhou 730000,Gansu,China;Schoolof Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Huainan 232001,Anhui,China;Xinjiang Xituo Mining Co.,Ltd.,Hami 839000,Xinjiang,China)
出处
《矿冶工程》
CAS
北大核心
2024年第4期155-158,163,共5页
Mining and Metallurgical Engineering
基金
深部煤矿采动响应与灾害防控国家重点实验室开放基金项目(SKLMRDPC22KF02)。
关键词
隔离矿柱
安全系数
单元安全度
沉降位移
厚度优化
barrier pillar
factor of safety
zone safety
settlement deformation
thickness optimization
