大型金属矿山深孔采矿两率指标管控技术创新与应用  

Technological Innovation and Application of Control Technology ofTwo Rate Indexes for Deep-hole Mining in Large Metal Mines

作　　者：李晓东[1] LI Xiaodong(Shirengou Iron Mine,Hebei Iron and Steel Group Mining Co.,Ltd,Zunhua 064200,China)

机构地区：[1]河北钢铁集团矿业有限公司石人沟铁矿,河北遵化064200

出　　处：《矿业工程》2024年第4期21-25,共5页Mining Engineering

摘　　要：石人沟铁矿回采采用深孔凿岩穿孔爆破,原垂直走向布置矿房和沿矿体走向布置矿房在矿房布置和穿孔方式上未按现场变化进行技术优化,导致深孔凿岩过程中未能根据矿体实际产状进行精准调整,造成矿体上盘和下盘矿石严重损失贫化,直接影响矿石两率指标,造成矿山生产成本偏高,使得矿石资源未能被充分利用。对此,技术人员进行矿房设计优化及凿岩施工过程管控,提高矿体内有效凿岩率,避免矿体外凿岩造成的工程浪费,矿体上盘和下盘的损失贫化率近乎于零。结合现场生产实际,精准实施多排毫秒延期爆破技术提高爆破效果,有效控制了大型矿山深孔采矿两率指标,提高了矿山生产效益。Deep hole drilling and perforated blasting is adopted for Shirengou iron ore mine.The mining rooms arranged vertically and along the strike of the ore body are not technically optimized according to on-site changes in terms of layout and perforation methods,resulting in failing to accurately adjust in accordance with the ore body's actual occurrence during the deep-hole drilling process,causing serious loss and dilution of ore in hanging wall and footwall of the ore body,which directly affects the two rate indexes of the ore and result in high production costs of the mine and insufficient utilization of ore resources.In this regard,technicians optimize the mining room design and control the rock drilling construction process to improve the effective rock drilling rate inside the ore body and avoid engineering waste caused by rock drilling outside the ore body,so that the loss and depletion rate of the hanging wall and footwall of the ore body is close to zero.Based on the actual production on site,the precise implementation of multi-row millisecond delay blasting technology improves the blasting effect,effectively controls the two rate indexes of deep-hole mining in large mines,and improves the production efficiency of the mines.

关 键 词：深孔凿岩 两率指标 优化矿房布置 施工管控 多排毫秒延期爆破技术 

分 类 号：TD853[矿业工程—金属矿开采]