A deep understanding of the crack formation mechanism between blastholes had great significance for improving the energy utilization rate of explosives. From the perspective of static mechanics of stress wave theory, this paper theoretically derived the stress distribution on the blasthole connecting. It was proven that the stress at the midpoint of the blasthole connecting was not the maximum. The analysis results contradicted the original theoretical results. Moreover, the finite element software LS-DYNA was used to numerically simulate the crack formation between adjacent blastholes in infinite rock media. The fluid-solid coupling method was used to simulate the effect of stress wave and detonation products on rocks. The simulation results were consistent with the actual situation and they showed that cracks were formed in the blastholes wall firstly. Stress wave superposition was not the main reason for crack penetration. Stress wave reflection stretching at the crack tip was vital for crack penetration.

中文翻译：

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相邻爆破孔间裂纹形成及侵彻机理的数值研究

深刻理解爆破孔之间的裂纹形成机理对提高炸药的能量利用率具有重要意义。从应力波理论的静态力学角度出发，从理论上推导了爆破孔连接处的应力分布。事实证明，爆破孔连接中点处的应力不是最大。分析结果与原始理论结果相矛盾。此外，使用有限元软件LS-DYNA数值模拟了无限岩石介质中相邻爆破孔之间的裂纹形成。采用流固耦合方法模拟了应力波和爆轰产物对岩石的影响。仿真结果与实际情况相吻合，表明首先在爆破孔壁中形成裂纹。应力波叠加不是裂纹渗透的主要原因。裂纹尖端处的应力波反射对于裂纹的渗透至关重要。