Application of perimeter formation control using mixed initiation network for complex working conditions
The-1 200 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 signifi-cantly 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 road-ways with complex working conditions and provided a reference for similar roadway blasting projects.
deep mininggold mineroadwayground stressmine watermixed initiation networksmooth blastingblasting effect
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