南非各采石场普遍采用直径为64毫米和80毫米的两种炮孔,使用的炸药为散装铵油炸药和包装代拿买特和浆状炸药。目前的法规要求是,露天矿超过3米的炮孔,要敷设导爆索。因此,中等直径的药包大多数都是侧面起爆。借助64毫米和80毫米两种直径的双钢管,试验研究了炸药在钢管中的爆炸特性。上部管为壁厚约3毫米的低碳钢蒸汽管。选 South Africa’s quarries commonly employ two boreholes 64 and 80 millimeters in diameter. The explosives used are bulk ammonium explosives and packeted explosives. The current regulatory requirement is that the blasthole over 3 meters in the open pit should be detonated. Therefore, the majority of middle-diameter kits are side detonators. Explosion characteristics of explosives in steel pipes were experimentally studied with twin tubes of two diameters of 64 mm and 80 mm. The upper tube is about 3 mm thick mild steel steam tube. selected