上向扇形中深孔爆破技术在马坑铁矿厚大缓倾斜矿体开采中的应用  

Application of Upward Fan-shaped Medium-length Hole Blasting Technology in Mining of Thick and Large Gently-inclined Ore Body of Makeng Iron Ore Mine

作　　者：林继兴 LIN Jixing(Fujian Jinfu Mining Co.,Ltd,Longyan 364000,China)

机构地区：[1]福建金氟矿业有限公司,福建龙岩364000

出　　处：《矿业工程》2024年第6期12-15,共4页Mining Engineering

摘　　要：马坑铁矿在厚大矿体开采中,急倾斜矿体主要采用大直径深孔阶段矿房嗣后充填法,倾斜矿体中常采用分段凿岩阶段矿房嗣后充填法,如何采用分段凿岩阶段矿房嗣后充填法高效的开采倾斜矿体,关键在于上向扇形中深孔爆破技术的合理应用,马坑铁矿通过合理的选择凿岩爆破参数,并在富余存窿矿量下进行多排微差爆破的挤压爆破技术,降低大块率,提高遥控铲运机的残矿回收率,大幅提高了回采率,实现了分段凿岩阶段矿房嗣后充填法安全、高效开采。In the mining of thick and large ore bodies in Makeng Iron Mine,the main method used for steeply inclined ore bodies is the large-diameter and long-hole block stoping with backfilling method,while the sublevel drilling and block stoping with backfilling method is often used for the inclined ore bodies.The key to efficiently mining inclined ore bodies using the sublevel drilling and block stoping with backfilling method lies in the rational application of upward fan-shaped medium-length hole blasting technology.The Makeng Iron Mine has achieved safe and efficient mining with the sublevel drilling and block stoping with backfilling method through selection of reasonable rock drilling and blasting parameters,and use of multi-row micro-differential extrusion blasting technology with surplus ore reserves to reduce the large block rate,improve the residual ore recovery rate of remote-controlled load-haul-dump vehicles,and greatly increase the recovery rate of the ore.

关 键 词：分段凿岩阶段矿房嗣后充填法 上向扇形中深孔爆破技术 多排微差爆破 

分 类 号：TD235[矿业工程—矿井建设]