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在贵港航运枢纽二期工程石方开挖中采用了深孔爆破，孔径为150mm，机具为KQ－150型潜孔钻．预裂爆破采用的不耦合装药系数为2．3，线装药密度为480～500g／m，使用432mm的甘油乳化炸药小药卷，长度每条20cm，重量每条200g．保护层开挖采用一次钻爆挖除法，适当减少孔底药径，增大孔底不耦合系数，底部用柔性材料如石粉或砂充填的装药结构，获得良好效果．
Deep hole blasting was used in the excavation of the rock excavation of Phase II project of Guigang Shipping Hub. The hole diameter was 150mm, and the machine was KQ-150 DTH drill. The pre-splitting blasting uses an uncoupled charge coefficient of 2.3, a linear charge density of 480-500 g / m, a 432 mm glycerol emulsified explosive small coil of 20 cm length and 200 g each. Protective layer excavation using a drill and blasting excavation method, appropriate to reduce the hole bottom diameter, increase the bottom hole coupling coefficient, the bottom of the flexible material such as powder or sand filled charge structure, get good results.