爆破作用下共线裂纹拉剪破坏特性研究

Study of Characteristics of Tension Shear Failure of Collinear Crack under Blasting

岩石中不同裂纹间存在相互作用,会对裂纹起裂等产生影响。运用断裂力学原理,基于经典Kachanov方法,推导了在地应力和爆破扰动作用下两条共线不等长裂纹端部的耦合应力强度因子,得出了拉剪型裂纹起裂时临界爆破扰动荷载与裂纹基本参数间的关系。

There is interaction between different cracks in the rock,which will affect the crack initiation and so on.By using the principle of fracture mechanics and based on Kachanov method,the couplingstress intensity factors at the crack tip of two collinear unequal cracks under crustal stress and blasting disturbance were derived.The relation between the critical blasting disturbance load and the basic parameters of the crack in tension shear type crack initiation is obtained.