简单分析了聚能爆破装药在孔内爆破的力学效应，阐明了聚能爆破对岩石定向破裂的控制机理。
The mechanic affection on the blast hole walls is simply analysed and cracking propagation caused by shaped charge is explained in this paper.
通过提高炸药爆速、大装药密度等方法可以提高聚能装药爆炸后形成射流的能量和改善聚能爆破切割石材的效果。
Explosive with high density and high velocity can greatly increase the explosion energy and improve the effect of rock materials cutting by shaped charge .
这种改进大大增加了有效射流长度，可使聚能装药的破甲威力大幅度提高。
Through these design ways, the valid length of jet and the penetration power of shaped charge were improved evidently.
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