Water decoupling charge blasting excels in rock breaking, relying on its uniform pressure transmission and low energy dissipation. The water decoupling coefficients can adjust the contributions of the stress wave and quasi-static pressure. However, the quantitative relationship between the two contributions is unclear, and it is difficult to provide reasonable theoretical support for the design of water decoupling blasting. In this study, a theoretical model of blasting fracturing partitioning is established. The mechanical mechanism and determination method of the optimal decoupling coefficient are obtained. The reliability is verified through model experiments and a field test. The results show that with the increasing of decoupling coefficient, the rock breaking ability of blasting dynamic action decreases, while quasi-static action increases and then decreases. The ability of quasi-static action to wedge into cracks changes due to the spatial adjustment of the blast hole and crushed zone. The quasi-static action plays a leading role in the fracturing range, determining an optimal decoupling coefficient. The optimal water decoupling coefficient is not a fixed value, which can be obtained by the proposed theoretical model. Compared with the theoretical results, the maximum error in the model experiment results is 8.03%, and the error in the field test result is 3.04%.

中文翻译：

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水解耦装药爆破动静力调节机理


水解耦装药爆破以其传压均匀、能量耗散低等特点，在破岩方面表现出色。水解耦系数可以调节应力波和准静态压力的贡献。但两者贡献之间的定量关系尚不清楚，难以为水解耦爆破设计提供合理的理论支撑。本研究建立了爆破压裂分区的理论模型。得到了最佳解耦系数的机械机理和确定方法。通过模型实验和现场试验验证了其可靠性。结果表明，随着解耦系数的增大，爆破动力作用下的破岩能力降低，而准静态作用下的破岩能力先增大后减小。由于炮孔和破碎区的空间调整，准静态作用楔入裂缝的能力发生变化。准静态作用在压裂范围内起主导作用，决定最佳解耦系数。最佳水解耦系数不是一个固定值，可以通过所提出的理论模型获得。与理论结果相比，模型实验结果最大误差为8.03%，现场测试结果误差为3.04%。