浅谈大西沟铁矿千吨级硐室爆破技术

Thousand ton volume chamber blasting in Daxigou Iron Ore Mine

介绍了陕西大西沟铁矿基建剥离硐室爆破设计在不利的自然条件下,进行药室优化布置、爆破参数选择、确定多段微差起爆顺序等方面的内容;实现了一次爆破122万m3实方,抛掷率57%,有效地控制了飞石、震害和破坏范围。

In stripping work in Daxigou Iron Ore Mine, the conditions for blasting are unfavorable. Under these conditions, the work of optimizing explosive chamber, selection of blasting parameters and determining of detonation sequence of multi-stages short delay blasting has been done. Thus, an 1.22 Mm^1 volume blasting with a throwing rate of 57% is successfully realized by which the flying stones, vibration harm and impacting area are well limited.