通过总结国内坚硬矿石和含铁石英岩的开采经验,暴露出了凿岩爆破方面的严重缺点。无论用扇形布孔方式还是用平行束状布孔方式,凿岩工作量都很大,从而拖延了矿块的采准期限,并降低了劳动生产率。例如,捷尔任斯基矿为开采“巴黎公社社员”矿井6号矿块的含铁石英岩,在采用束状布孔方式时,必须钻凿直径为105毫米的深孔20多公里,这显然很不合适。如果再进一步 By summarizing the experience of the mining of hard and ferrous quartz rocks in the country, serious shortcomings in rock and roll blasting have been revealed. No matter using scalloped pattern or parallel beam pattern, the workload of rock drilling is very large, which delays the mining deadline and reduces the labor productivity. For example, the Dzerzhinski mine is a ferrous quartzite that mined Block 6 of the “Commune of Paris Commune”, and when using the bundled hole pattern, it is necessary to drill more than 20 kilometers of deep holes with a diameter of 105 mm Obviously not suitable. If you go further