摘要
纱岭金矿回风井-1200 m水平巷道爆破掘进施工受地应力、层理和矿井水等复杂工况的影响,爆破成形差,辅助作业时间长,施工进度缓慢。为解决上述问题,采用数码电子雷管-导爆索混合起爆网络周边成形控制技术,优化原始爆破方案并开展了现场试验。试验结果表明:优化后的数码电子雷管-导爆索混合起爆网络光面爆破方案显著提高了爆破成形效果,降低了围岩损伤,半孔痕率提高了54.5百分点,超挖系数下降了21.7%,作业时间缩短了15%,经济成本每循环降低了185.7元,实现了深部复杂工况巷道的周边成形质量控制,为类似巷道爆破工程提供了参考。
The-1200 m roadway blasting and excavation construction in the return air shaft at Shaling Gold Mine is affected by complex working conditions such as ground stress,stratification,and mine water.These factors result in poor blast formation,long auxiliary operation time,and slow construction progress.To address these issues,the digital electronic detonator-detonating cord mixed initiation network perimeter formation control technology was adopted to optimize the original blasting scheme and conduct field experiments.The results of the field experiments showed that the optimized digital electronic detonator-detonating cord mixed initiation network and smooth blasting scheme significantly improved the blasting formation effect,reduced surrounding rock damage,increased the half-hole mark rate by 54.5 percentage points,decreased the over-excavation coefficient by 21.7%,shortened the operation time by 15%,and reduced the economic cost per cycle by 185.7 yuan.This achieved quality control of perimeter formation in roadways with complex working conditions and provided a reference for similar roadway blasting projects.
作者
李芹涛
袁永忠
李明辉
杨乙
呼亚洲
Li Qintao;Yuan Yongzhong;Li Minghui;Yang Yi;Hu Yazhou(Laizhou Huijin Mining Investment Co.,Ltd.)
出处
《黄金》
CAS
2024年第8期46-51,共6页
Gold
基金
国家重点研发计划项目(2016YFC0600800)。
关键词
深部开采
金矿
巷道
地应力
矿井水
混合起爆网络
光面爆破
爆破效果
deep mining
gold mine
roadway
ground stress
mine water
mixed initiation network
smooth blasting
blasting effect
