【摘要】 以爆炸动力学、岩石断裂力学理论为原理,对聚能药包用于岩石定向断裂爆破时导向裂缝的形成,裂纹的起裂、扩展和贯通进行了初步研究,同时对该方法的爆破参数进行了设计,并通过现场进行试验验证其正确性。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,表明该方法是一种比较理想的断裂控制爆破技术。最后指出了该方法目前需要进一步研究的方面。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。更多还原

【Abstract】 Based on the dynamics of explosion and fracture mechanics,the mechanism of crack initiation and its expansion of directional fracture controlled blasting by shaped charge with wedge-type liners in rock were rough studied,the blasting parameters were designed and tested in field.The results show that the energy from blasting be directionally concentrated by the jointcutting produced by cumulative jet.The directional expansion of crack is satisfactory,field test suggest that this blasting is a good means in excavating tunnels or cutting rock.It points out the aspects of this method need to be studied further.All these will give beneficial references to related theoretical study and field application.更多还原