电子雷管微差爆破技术在银山矿掘进爆破中的应用  

Application of Electronic Detonator Millisecond Blasting Technology in Yinshan Mine Excavation Blasting

作　　者：张建华 张玉健 陈志强 王国立 ZHANG Jianhua;ZHANG Yujian;CHEN Zhiqiang;WANG Guoli(Yinshan Mining Co.,Ltd.,Jiangxi Copper Group;Beijing JCHX Mine Technology Research Institute Co.,Ltd.)

机构地区：[1]江西铜业集团银山矿业有限责任公司,江西省上饶市334000 [2]北京金诚信矿山技术研究院有限公司

出　　处：《现代矿业》2023年第2期112-114,118,共4页Modern Mining

摘　　要：在井下掘进爆破中,电子雷管微差延期时间的设定是影响爆破效果的关键因素。通过对大直径空孔直眼掏槽掘进爆破延期时间设置的理论分析,提出采用微差延期时间修正公式进行优化。得出掏槽孔采用150~300 ms的微差间隔逐孔起爆,崩落眼和周边眼采用50~100 ms微差间隔的同段延期起爆方案。在银山矿井下巷道掘进中实践表明,方案操作安全性大大提高,爆破后效果良好,掏槽孔残孔基本在20 cm以下,掘进平均炮孔利用率达到93%,且极少出现残药、残孔的现象;巷道断面成型规整,爆后岩石块度均匀、爆堆集中,经济及社会效益显著。In the underground excavation blasting,the setting of the delay time of the electronic detonator is the key factor affecting the blasting effect.Through the theoretical analysis of the delay time setting of large diameter empty hole straight hole cutting blasting,it is proposed to optimize the millisecond delay time correction formula.It is concluded that the cut hole is detonated hole by hole with a millisecond interval of 150~300 ms,and the caving eye and the surrounding eye are detonated at the same delay interval of50~100 ms.The practice in the excavation of underground roadway in Yinshan Mine shows that the operation safety of the scheme is greatly improved,and the effect is good after blasting.The residual hole of the cutting hole is basically below 20 cm,and the average utilization rate of the excavation hole is more than93%,and the phenomenon of residual drug and residual hole is rare.The cross-section of the roadway is regular,the rock block after blasting is uniform,the blasting pile is concentrated,and the economic benefits and social benefits are remarkable.

关 键 词：电子雷管 井巷掘进 微差延期时间 爆破参数 

分 类 号：TD235[矿业工程—矿井建设] TD263