新城金矿Ⅴ~#矿体-680m中段开采优化  

Mining optimization for the-680 m section of Ⅴ~# ore body in Xincheng Gold Mine

作　　者：车赛杰 吕文生[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《有色金属（矿山部分）》2015年第5期17-21,共5页NONFERROUS METALS(Mining Section）

基　　金："十二五"国家科技支撑计划项目(2012BAB08B01)

摘　　要：以新城金矿Ⅴ#矿体-680m中段为工程背景,基于原有的"隔一采一"的回采顺序提出"一步采超前二步采6、9、12分层开采"的3种方案。通过FLAC3D软件,模拟3种开采方案的二步矿柱,从而获得围岩与矿体的应力、位移及塑性区域变化规律,可有效地对矿山回采矿体进行优化与选择。研究结果表明,一步采超前二步采6分层后再转向二步开采,其顶板、上盘的位移及塑性区域最小,盘区两帮等处于较好的力学状态,可有效缓解应力过于集中的现象,实现安全高效开采。本研究结果对类似矿山的开采有重要的借鉴意义。With the -680 m section of V^# ore body in Xincheng Gold Mine as engineering background, based on the original excavating sequence of ＂taking one every the other one＂, three other mining methods have been put forward. Those are one-step mining excavated before two-step mining 6 or 9 or 12 horizontal slices separately. By means of FLAC^3D numerical simulation, the rule of mining ore body and wall rock is obtained, including displacement, stress and plastic zone, which can direct mining effectively. The results are shown as follows： with the mining method that one-step mining excavated before two-step mining 6 horizontal slices and then finish excavating the two-step mining, the displacement of roof and hanging side is the least and avoiding from large-scale of plastic zone. At the same time, the wall of panel is in better stress state, which can relieve the phenomenon of stress concentration and realize safety and high efficiency of mining. The research has an important referential significance for similar mines in the design of ore body excavation.

关 键 词：回采顺序 应力集中 超前开采 数值模拟 FLAC^3D 

分 类 号：TD823.253[矿业工程—煤矿开采]