大北山铁矿分区开采方法研究

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英文篇名：Discussion on the Mining by Districts in Dabeishan Iron Mine 作者：任凤玉 ; 刘洋 ; 曹建立 ; 何荣兴 ; 周颜军 ; 刘欢 英文作者：Ren Fengyu;Liu Yang;Cao Jianli;He Rongxing;Zhou Yanjun;Liu Huan;School of Resources and Civil Engineering,Northeast University; 关键词：分区开采 ; 临界散体柱理论 ; 分段诱导冒落法 ; 上向分层干式充填法 ; 临界跨度 英文关键词：Mining by districts;;Critical medium column theory;;Sublevel induced caving method;;Upward horizontal cut-and-fill dry mining method;;Critical span 中文刊名：JSKS 英文刊名：Metal Mine 机构：东北大学资源与土木工程学院; 出版日期：2018-07-15 出版单位：金属矿山 年：2018 期：No.505 语种：中文; 页：JSKS201807008 页数：5 CN：07 ISSN：34-1055/TD 分类号：50-54

摘要

大北山铁矿现用浅孔留矿法采矿,存在着效率低、安全条件差、矿柱损失大等问题,不能满足安全高效开采要求。此外,部分工业设施与生活区、尾矿库、县级道路等,位于矿体水平投影范围之内。但浅孔留矿法不具备保护地表不被破坏的功能。根据临界散体柱理论和现场调查结果,确定出保护区间,并将矿体分为东南区、中央区及西北区协同开采。中央区采用分段诱导冒落法,最大化提升采矿效率,减小矿石积压。东南区和西北区采用上向分层干式充填法,保障了地表建筑物安全并限制了地表移动范围的增大。根据现场调查和平衡拱应力分析得出中央区采场的上盘诱导冒落工程长度,为类似矿山开采方案提供了参考依据。
        Dabeishan Iron Mine adopted the shallow-hole shrinkage mining,with disadvantages of inefficiency,poor security and heavy economical loss. The method can not meet the requirement of good safety and efficiency. Then,the partial industrial facility,the living quarters,tailings pond and county road locate at the horizontal projection range of orebody. However,the shallow-hole shrinkage mining can not avoid from the surface damage. According to the field survey results and the critical medium column theory,the range of safeguard was obtained,the orebody then was divided into south-east district,northwest district and central district. In order to improve mining productivity and reduce ore overstocked,the sublevel induced caving method was used in the central district. Meanwhile,the upward horizontal cut-and-fill dry mining method was used in south-east district and north-west district to protect surface the buildings and limit surface movement. According to the field test and the force analysis of balanced arch,the engineer length of induced caving in the hanging wall of central district was obtained,thus providing a reference for the similar mining plan.

引文

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