断裂力学在爆破中远区裂纹扩展范围中计算

Calculation of Fracture Mechanics in the Crack Propagation Area of the Explosion

基于岩石爆破理论,从理论上探讨了隧道开挖爆破的机理、爆破地震波的传播规律及效应。在断裂力学与损伤力学理论框架下,根据隧道围岩的裂纹萌生和扩展条件,计算了第一、二类复合裂缝的扩展范围,得到了爆炸荷载作用下两种裂纹的扩展半径。

Based on rock blasting theory, the mechanism of tunnel excavation blasting is discussed theoretically, and propagation law and effect of blasting seismic wave. In the framework of fracture mechanics and damage mechanics, and according to the condi-tions of crack initiation and propagation, and the expansion range of the first and second kinds of composite cracks is calculated, and the propagation radius of two kinds of cracks under blast loading is obtained.