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近年来,矿井的爆破作业推广了深孔光面爆破的新技术。为了提高煤炭生产率,在瓦斯矿井也推广了此项技术,相应地提出了适用于瓦斯煤层用的煤矿导爆索或称“安全导爆索”。煤矿导爆索在深孔光面爆破中有显著的优越性。在较深的炮孔中,装药长度过长,对硝酸铵类的低爆速炸药就不能一次起爆,为了弥补这一缺陷,在较长装药炮孔中采用导爆索连接最为适宜。此外,在光面爆破中,为使周边光滑平直,减少周岩的破坏,通常使用分段装药,
In recent years, the mine blasting operation has popularized the new technology of deep-hole smooth blasting. In order to improve the productivity of coal, this technology has also been popularized in gas mines. Correspondingly, a detonating cable or “safety detonating cable” for coal used in gas coal seams has been put forward. Mine detonating cord in the deep-hole smooth blasting has significant advantages. In the deeper boreholes, the charge length is too long, the low explosive detonation of ammonium nitrate class can not be a detonation, in order to make up for this defect, the use of detonating cable connection in the longer charge hole most appropriate. In addition, in the smooth blasting, in order to make the periphery smooth and straight, to reduce the destruction of peridotite, usually using segmented charge,