Abstract The high-energy rate of shock waves, as an important part of explosion energy, plays a significant role in the mechanism of rock fragmentation. This energy rate and the mechanism of rock fracturing are controlled by several parameters related to both the explosive charge and rock mechanical properties. In this study, the mechanism of rock fragmentation due to blast-induced shock waves in a single blasthole was numerically simulated by a two-dimensional discrete element code. The numerical results included the stresses around the blastholes, the number of blast-induced fractures and the density of cracks, which were compared with the corresponding experimental results. This comparison showed that the numerical results were in good agreement with their experimental counterparts. It is concluded that the proposed numerical model could be effectively used for the simulation of the crack propagation process around a blasthole.

中文翻译：

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炮眼周围裂隙带的数值模拟

摘要 冲击波的高能率作为爆炸能量的重要组成部分，在岩石破碎机理中起着重要作用。该能量率和岩石破裂的机制由与炸药装药和岩石力学特性相关的几个参数控制。本研究通过二维离散元代码对单个炮眼中由爆破引起的冲击波引起的岩石破碎机制进行数值模拟。数值结果包括炮眼周围应力、爆破裂纹数和裂纹密度，并与相应的实验结果进行了比较。该比较表明数值结果与他们的实验对应物非常一致。