大断面硬岩巷道聚能爆破设计及应用

基于平煤股份四矿大断面岩巷地质和施工条件,依据聚能爆破技术原理,对原有常规爆破参数进行了优化设计,现场聚能爆破工业性试验结果表明,该设计参数与原参数相比,可提高掘进进尺15%、降低巷道围岩超欠挖量50%、节约成本20%,技术经济效果良好。

Optimization of Shaped Charge Blasting for Hard Rock Roadway with Large Section

When advancing in hard rock roadway, compared with conventional blasting, the shaped charge blasting technique could get more ideal blasting effect on the premise of saving blasting material. In this paper, according to the geological and construction conditions of rock roadway with large section in Fourth Mine of Pingdingshan Coal Co.,LTD, and based on the principle of shaped charge blasting technique, we designed new blasting parameters on the original conventional blasting parameters. The shaped charge blasting engineering practice showed that, compared with original parameters, the new parameters could increase the footage by 15% and reduce the amount of overbreak and underbreak on roadway surrounding rock by 50% and save the cost by 20%, and achieve good technology economic results.