层状岩体爆破损伤断裂机理分析

The mechanism analyses of bedded rock blasting damage and fracture

分析了岩体交界层面之间具有黏结力的层状岩体的受力状况和爆炸应力波在层状岩体中的传播过程,比较了应力波在同一介质和不同介质、在相同传播距离的衰减状况.分析表明,层状岩体的断裂损伤是爆炸应力波的动作用和爆生气体静作用共同作用的结果,爆生裂纹可以在比以往理论预测值更低的气体压力作用下起裂和稳定传播,从而使气体的作用表现的更有效.

The forced situation and the spreading process of blasting stress wave of bedded rock with cohesion was analyzed. The blasting stress wave which spreading same distance between same medium and different medium attenuation was compared. The conclusions indicate that, the jointly action blasting stress wave and denotation vapor lead to the bedded rock damage and fracture. Effective stress intention gene explain crack produced with blasting spread under low gas pressure comparing theory reckon, which make the gas action more effective.