极坚硬矿岩分段空场中深孔爆破网络优化

Optimization on the Medium-length Hole Blasting Network of Sublevel Open Stoping of Extra-hard Ore-bearing Rocks

会宝岭铁矿井下中深孔爆破对地表建筑物震动影响较大,对此,通过理论分析,对现有的爆破网络进行优化设计。结果表明,优化后的爆破网络减小了爆破震动和矿石大块率,降低了二次爆破的成本,取得了较好的经济效益和社会效益。

The influence of medium-deep hole blasting underground to the surface building vibra- tions of Huibaoling iron mine. So, through the theoretical analysis, the existing blasting network is opti- mized. The research result show that, the blasting vibration and the rate of ore blocks are reduced and the cost of secondary blasting is lowered by the optimized blasting networks, besides that, good economic and social benefits are obtained.