In order to reduce dense radial cracks around charge and facilitate required crack in control blasting,the measures to be taken are to depress the function of blasting stress wave and increase acting time of explosion gas,i. e.

• 在控制爆破中,为使炮孔周围产生的较密集的径向裂纹减少,使需要扩展的裂纹得到充分扩展,主要措施就是降低爆炸应力波作用,增加爆生气体的作用时间,即采取不耦合装药。