运用LS-DYNA3D程序模拟分析了爆炸应力波与预裂缝的相互作用过程中,应力波通过预裂缝的传播过程以及衰减规律,得到了预裂爆破的降震规律,数值计算结果表明,具有足够宽度和深度的预裂缝具有明显的降震效果。%The interaction of stress wave of blasting and pre-splitting crack was simulated with LS-DYNA3 D program, the dissemination process and the reduce regulation that the stress wave pass through the pre-splitting crack was analyzed, and the shock-absorption rules of pre-split blasting was found. The result of the numerical calculate implies that the pre-splitting crack with enough width and depth has obvious effect of shockabsorption.
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