海南铁矿露天转地下三维探采结合方法

摘要

Hainan iron ore is a high grade hematite mine with a complicated morphology and reappearance of lapout. Dur-ing transition process from open pit to underground mining,its hanging-wall ore is exploited by adopting the induction caving with large structural parameter. In order to accelerate the proceeding of mining and control the ore loss and dilution effectively, ore body's distribution and its boundaries should be detected clearly and rapidly. Herein,three-dimensional mining-exploiting combination method is investigated to detect and delineate orebody secondly by utilizing information of the ore rock exposed from mining-exploiting combined engineering of three sublevel, open pit slope and sublevel drilling project. Accordingly, the layout form and rational position of the development project is optimized. Production practice shows that the three-dimensional mining-exploiting method improves the efficiency and accuracy in delineating the ore-body,and ensures the high efficient min-ing of the hanging wall ore,with better technical and economic effect achieved.%海南铁矿矿石为高品位赤铁矿,矿体形态及其尖灭再现关系复杂,在露天转地下开采的过渡期,应用大结构参数诱导冒落法开采挂帮矿体,为加快其开采进程和有效控制矿石损失贫化,需要快速探清矿体分布及其边界位置.为此,研究海南铁矿三维探采结合方法,利用3个分段同时施工的探采结合工程、露天边坡以及分段钻探工程揭露的矿岩信息,快速探测与二次圈定矿体,据此优化采准工程的布置形式与合理位置.生产实践表明:这一三维探采结合方法,提高了矿体圈定的效率与精确度,保障了挂帮矿的高效开采,取得了良好的技术经济效果.