基于爆破震动的阶段矿柱厚度优化  

Thickness optimization for stage pillar based on blasting vibration

作　　者：胡明兵[1] 陈忠熙 肖繁[1] 李刚[1] 赵奎[1] 张亮[1] 程三建 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]山西中条山工程设计研究有限公司,山西运城043700

出　　处：《有色金属科学与工程》2017年第1期127-133,共7页Nonferrous Metals Science and Engineering

基　　金：江西省研究生创新专项资金项目(YC2014-S350)

摘　　要：为研究阶段矿柱的最小预留安全厚度,以上饶市某铜矿-100 m至-150 m中段采场回采为研究背景,针对爆破震动对矿山实际开采的影响,应用FLAC3D数值模拟软件对原设计阶段矿柱厚度5 m进行验算,并提出合理的阶段矿柱最小预留安全厚度.通过重点分析其静力和爆破动荷载条件下阶段矿柱的最大拉应力、垂直位移、塑性破坏域的模拟结果,结果表明:在静力条件下,阶段矿柱厚度分别为5 m和6 m时,采场均保持稳定;在爆破动荷载条件下,阶段矿柱厚度为6 m时,采场保持稳定,但为5 m时,采场处于欠稳定状态.结合理论模型的分析结果,最终确定阶段矿柱最小预留安全厚度为6 m.To determine the minimum reserve safe thickness level of stage pillar, the middle stope mining from-100 m to-150 m in a copper mine in Shangrao City was studied.According to the effects of blasting vibration to practical mining, the designed stage pillar with thickness of 5 m is checked by FLAC3 D.A reasonable minimum reserve safe thickness level of stage pillar is proposed.Through comparative analysis of simulation results under static and dynamic load blasting conditions, the results show that stopes are stable under static condition when the thickness of stage pillar is 5 m or 6 m.Under the blasting dynamic load condition, the stope is stable if the thickness of stage pillar is 6 m.However, when it is 5 m, the stope is in a less stable state.On the basis of analyzing theoretical model, the minimum reserve safe thickness level of stage pillars with thickness of 6 m is concluded.

关 键 词：阶段矿柱 数值模拟 爆破荷载 厚度优化 

分 类 号：TD323[矿业工程—矿井建设] TD862.1