无底柱分段崩落法沿脉进路大断面出矿研究  

Research of On-reef Drift Large Section Drawing in Nonpillar Sublevel Caving Method

作　　者：韩文成 郭友学 郑海峰 李艳君 肖海军[2] 张伟华[2] 

机构地区：[1]弓长岭矿业公司井下铁矿 [2]东北大学

出　　处：《金属矿山》2003年第8期12-13,47,共3页Metal Mine

摘　　要：针对无底柱分段崩落法沿脉布置采矿巷道存在混岩率大、回收率低的问题 ,试验了将沿脉断面从 3.4m× 3m提高到 6 5m× 3m ,试验结果表明 ,矿石回收率可以由原来的 5 5 %提高到 75 %～ 80 % ,年可多回收矿石15 94万t,年创经济效益近 4 0 0万元。In light of the problems of the great rock mixing ratio and low recovery existing in on reef drift drawing in nonpillar sublevel caving, a test was made on raising the on reef drift section from 3.4m×3m to 6.5m×3m. The results showed an ore recovery improvement from 55% to 75%～ 80%, suggesting a recovered ore increase of 0.1594 million t/a and an economic benefit of nearly 4 million yuan per annum.

关 键 词：无底柱分段崩落法 井下开采 沿脉断面 巷道布置 回收率 弓长岭铁矿 放出体参数 出矿方案 

分 类 号：TD861.133.62[矿业工程—金属矿开采]