垂直矿体走向布置矿房下盘中深孔回采技术研究与应用  

Study and Application of Deep-hole Stoping Technology in the Footwall of Bordroom Arranged Vertically to Orebody Strike

作　　者：赵笛 杜英男 任庆伟 黄海辉 ZHAO Di;DU Yingnan;REN Qingwei;HUANG Haihui(Shirengou Iron Mine of HBIS Mining Company, Zunhua 064200,China)

机构地区：[1]河钢集团矿业公司石人沟铁矿,河北遵化064200

出　　处：《矿业工程》2022年第3期4-8,共5页Mining Engineering

摘　　要：石人沟铁矿三期工程矿体平均倾角为70°,垂直矿体走向布置的矿房原回采过程中垂直凿岩巷道的中深孔排面一般在矿体下盘矿岩比值为1时停止继续穿孔施工,此法造成该类矿体下盘矿石的一定损失贫化。本文依托该铁矿-210 m中段11-4#穿M2矿房,紧贴并平行其下盘布置凿岩巷道,在该巷道内钻凿上向扇形中深孔,以已形成的空场作为自由面向空区内崩矿,从而实现对下盘矿石的回采,同时避免矿房下盘岩石的混入。The average dip angle of ore body in Stage-3 project of Shirengou Iron Mine is 70°.In the original stoping process of the bordroom arranged vertically to the ore body,generally the perforation construction of the middle-deep holes row pattern of the vertical drilling roadway generally stops when the ore-rock ratio in the footwall of the ore body is 1,which causes certain loss and dilution of ore in the footwall of this kind of orebody.In this paper,relying on No.11-4 in the level of the-210 m of this iron mine,which passes through M2 bordroom,a rock-drilling tunnel is arranged close to and parallel to its footwall.In this tunnel,an upward fan-shaped medium-deep hole is drilled,the formed open stope is used as a free face to cave the ore in the mined-out area,so as to stope the footwall ore and avoid the mixing of the rocks of the footwall of the bordroom.

关 键 词：垂直矿体走向布置矿房 扇形中深孔 下盘矿石 损失贫化 

分 类 号：TD861[矿业工程—金属矿开采]