弓长岭铁矿高落差端部矿体安全开采技术研究  

Safety Mining Technology for the Large Drop Orebody at the End of Collapse Pit in Gongchangling Iron Mine

作　　者：任凤玉[1] 宋德林[1] 李海英[1] 宫国慧[2] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]鞍钢集团矿业公司弓长岭矿业公司,辽宁辽阳111007

出　　处：《金属矿山》2014年第10期1-4,共4页Metal Mine

基　　金：教育部基本科研业务费青年教师科研启动基金项目(编号:N130301002)

摘　　要：弓长岭铁矿二矿区的中央区地下回采工作面与东南区露天采场的落差高达700 m,且在-220 m水平由中央区向东南区扩采了200 m,因此2区衔接部位有约500 m长的高落差端部矿体处于移动带内,未纳入露天设计开采范围。通过分析端部矿体的赋存条件及岩移危害形式,发现只有地表塌陷坑边壁的片落对端部矿体的开采构成安全危害,据此,运用临界散体柱理论,提出了向地表塌陷坑充填废石的措施,以控制塌陷坑边壁片落,并制定了沿塌陷坑边帮与轴线方向协调排岩的工艺方法,以保障排岩的施工安全。在此基础上,东南区露天采场西侧的端部矿体可以进行开采,可由东南区露天采场向西扩采完成。The drop between underground mining face of central area and open pit of southeast area is about 700 m in Gongchangling second mining area,and in-220 m level the stope face is expanded 200 m from central area to southeast area,so about 500 m ore body which locates in the convergence site of the two mining area can＇t be mined for locating in movement range.By analyzing orebody that at the end of collapse pit occurrence conditions and hazards form of rock movement,only the side wall chipping of collapse pit hazards the safety of orebody that at the end of collapse pit mining,and based on the theory of critical granular column,a measure that filling the existing collapse pit with waste rock to control chipping is proposed.And developed a scheme that to dump rock along the axial direction and along collapse pit edge direction cooperatively to ensure safety.On this basis,the orebody that at the end of collapse pit can be be mined with open-pit mining method by expand the open pit of southeast area.

关 键 词：高落差 端部矿体 临界散体柱 岩移控制 废石充填 

分 类 号：TD853[矿业工程—金属矿开采] TD854[矿业工程—矿山开采]