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以前,隧道爆破使用的炸药品种比较单调,往往是不论何种岩石,有水无水,不论断面大小,不论深孔、浅孔,只要进行钻爆均以同种药卷爆破。用得最多的是2号岩石炸药标准药卷。诚然,国内生产的炸药品种缺少多样化,系列化是一个原因。但是,在隧道爆破中,细致地计划和选择炸药合理装药结构也是不够的。由于长期使用单一品种规格炸药进行隧道爆破,结果无论在综合成本上,安全效果上、炮眼利用率、周边围岩稳定状况等爆破效果上都不够理想。
In the past, the varieties of explosives used in tunnel blasting were relatively monotonous. Often, no matter what type of rock, water or water was present, regardless of the size of the section, deep holes and shallow holes were exploded with the same type of drug as long as they were drilled and exploded. The most used is the No. 2 rock explosives standard drug roll. It is true that the lack of diversification and serialization of domestically produced explosives is one reason. However, in tunnel blasting, it is not enough to carefully plan and select the proper charging structure of explosives. Long-term use of a single variety of explosives for tunnel blasting results in both the comprehensive cost, the safety effect, blasthole utilization, surrounding rock stability and other blasting effects are not ideal.