针对目前石材开采面临的问题，对采用聚能药包岩石定向断裂控制爆破技术时的裂缝（纹）起裂和扩展的机理进行了探讨，同时对该法的爆破参数进行了设计；实验室和现场试验验证结果表明，由聚能射流形成的切缝有明显的定向作用，使爆生气体的能量沿预定方向集中，裂纹的定向断裂控制效果良好，表明该法是一种比较理想的断裂控制爆破技术；研究成果对相关理论研究和现场应用均有一定的指导意义，该法将会成为岩石定向断裂控制爆破发展的一个方向。

In order to solve the problems of stone exploitation, the mechanism of crack initiation and its expansion of directional fracture controlled blasting with linear cavity effect cutter in rock were roughly studied based on the theories of cumulative energy effect, mechanics of explosive and rock fracture mechanics, then the blasting parameters were designed and tested by model test in laboratory and field. The experimental results show that the energy from blasting can be directionally concentrated by the cumulative energy jet. The directional expansion of crack is satisfactory. Model test and field test suggest that the directional fracture controlled blasting with linear cavity effect cutter is a good means in excavating tunnels or cutting rock. It points out that the prospect of this method is promising. All these will give beneficial references to related theoretical study and field application.