Abstract
由于预裂爆破过程具有瞬时性，模糊性以及相关因素的多样性，不可能采用实验手段解决这个问题。本文结合典型工程，通过数值模拟手段对预裂爆破减振效应进行了计算与分析，再现了应力波与预裂缝的作用过程及应力波通过预裂缝时的传播规律，得出应力波对围岩造成的损伤范围，结果表明，10 cm宽的预裂缝降振率可达90%以上。 Because of the instantaneity, ambiguity and diversity of related factors in the process of pre-split blasting, it is impossible to solve this problem by using experimental means. Based on a typical project, calculation and analysis of vibration effect are made by means of numerical simulation of pre-split blasting in this paper. The roduction process of the stress wave and the rule of pre-crack propagation are researched, and the damage range of surrounding rock is determined. The results show that vibration reduction rate is about 90% for 10 cm wide pre-crack.
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