煤矿硬岩下山巷道掘进中深孔爆破技术试验研究

摘要

In order to improve the tunneling circulation footage and speed of coal mine hard rock diphead, on the premise of safety requirements of blasting in coal mine, according to tunnel section and rock property, the field experimental on hole depth, hole diameter, charge diameter, cut type and parameters, smooth blasting parameters and charge form, bottom hole parameters and baseplate controlling, reasonable detonating circuit were researched. The energy concentrated at hole bottom technology and water cushion in smooth blasting charge technology and increasing bottom hole mounts and iron casing pipe preventing silted up et al. were adopted to research good blasting results.%为了提高煤矿坚硬岩石下山掘进循环进尺和掘进进度,在满足煤矿井下爆破安全要求的前提下,根据下山巷道断面和岩石性质,对炮眼深度、炮眼直径和药卷直径、掏槽形式和掏槽参数、光面爆破参数和光面爆破装药结构、底眼爆破参数和底板控制、合理的起爆方式等进行了现场试验研究.采用底部集能装药掏槽爆破技术和水垫层周边光爆装药结构、增加底眼数量和深度、铁套管防回淤等技术和工艺,取得了良好的爆破效果.