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现代矿业 ›› 2024, Vol. 40 ›› Issue (02): 96-99.
针对某地下金属矿山高阶段直溜井掘进爆破超挖量大，拟通过降低炸药用量、增大不
耦合系数对原有大直径间隔装药结构进行优化。经理论分析，提出采用70 mm直径药卷空气间隔装
药结构替代原140 mm药卷毛竹间隔装药结构，采用数值仿真计算和现场试验对比2种光面爆破装药
结构的爆破效果。结果表明：140 mm直径药卷间隔装药结构爆破后岩体损伤较为严重，易导致超挖
问题，光爆成型效果一般；而70 mm直径药卷空气间隔装药结构爆破后岩体损伤明显减弱，有利于溜
井光爆成型。同时为提高小直径药卷光面爆破过程中岩体破碎度，可考虑增加辅助孔数量，保障溜
井顺利开拓。
In view of the large amount of over-excavation in the high-stage straight chute excavation
blasting of an underground metal mine，it is proposed to reduce the amount of explosives and increase the
decoupling coefficient to optimize the original large-diameter interval charge structure.Through theoretical
analysis，it is proposed to replace the original 140 mm cartridge bamboo interval charging structure with a
70 mm diameter cartridge air interval charging structure. The effects of two kinds of smooth blasting charging
structures are compared by numerical simulation calculation and field test.The results show that the rock
mass damage is serious after the blasting of the 140 mm diameter cartridge interval charge structure，which
is easy to lead to the problem of over-excavation，and the effect of smooth blasting is general.After blasting，
the rock mass damage of the 70 mm diameter cartridge air interval charging structure is obviously weak⁃
ened，which is beneficial to the smooth blasting forming of the chute.At the same time，in order to improve
the rock mass fragmentation in the smooth blasting process of small diameter cartridge，the number of auxil⁃
iary holes can be increased to ensure the smooth development of the chute.
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