摘要
介绍了一种定向方法。通过对断裂过程中动力学分析,建立了动的开裂判据和计算方法,并讨论了裂纹扩展中分义的可能性以及孔内初始压力(p_a)和孔几何参数对最终裂纹长度的影响。
A procedure of fracture control blasting for achieving directional breaking of
rocks by blasting is presented. The criterion for initiating of radial cracks in borehole wall under dynamic load and the method for determining the permissible rang of initial gas pressure (p0) in the charge cavity are developed .and the branching of radial cracks and the effeets of the pressure (p0) and blasthole geometry (R0.a.L3) on final dimensions of directed cracks are studied .with Fracture Mechanics analysis in all three aspects of fracture process including crack initiation .crack propagation and crack arrest.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
1991年第6期91-96,共6页
Journal of Chongqing University
关键词
断裂控制爆破
断裂面控制
断裂力学
fraecture control blasting
fracture plane control
fracture mechanics
