In this paper, the Johnson-Holmquist II (JH-2) model with parameters for a dolomite rock was used for simulating rock fragmentation. The numerical simulations were followed by experimental tests. Blast holes were drilled in two different samples of the dolomite, and an emulsion high explosive was inserted. The first sample was used to measure acceleration histories, and the cracking pattern was analyzed to perform a detailed study of the blast-induced fracture to validate the proposed method of modelling and to analyze the capability of the JH-2 model for the dolomite. The second sample was used for further validation by scanning the fragments obtained after blasting. The geometries of the fragments were compared with numerical simulations to further validate the proposed method of modelling and the implemented material model. The outcomes are promising, and further study is planned for simulating and optimizing parallel cut-hole blasting.

中文翻译：

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白云岩爆破破裂试验及数值模拟

在本文中，具有白云岩参数的 Johnson-Holmquist II (JH-2) 模型用于模拟岩石破碎。数值模拟之后是实验测试。在两个不同的白云岩样品上钻了爆破孔，并插入了乳化高炸药。第一个样本用于测量加速度历史，分析开裂模式以对爆炸引起的断裂进行详细研究，以验证所提出的建模方法并分析 JH-2 模型对白云岩的能力。通过扫描爆破后获得的碎片，第二个样品用于进一步验证。将碎片的几何形状与数值模拟进行比较，以进一步验证所提出的建模方法和实施的材料模型。