Fragmentation energy ratio is an important index to evaluate whether an explosive is used efficiently. This paper discusses the effect of water-decked blasting on fragmentation energy based on theory and numerical simulation, and three blasting tests were performed to measure the actual fragmentation energy at a granite-based field. Results show that at the same charge amount, the maximum borehole pressure of water-decked blasting is much greater than that of normal blasting in theory, which facilitates rock breaking. In numerical simulation, water-decked blasting is more beneficial to the transmission of explosive energy; therefore, the damage distribution is more uniform and the damage level is higher. The specific surface area and fragment size distribution were obtained by three-dimensional laser scanning and image analysis in field tests; therefore, the fragmentation energy could be measured, which showed that the fragmentation energy could be increased by 10% in water-decked blasting. In addition, water-decked blasting can reduce fly rocks and ensure the safety of rock blasting.

中文翻译：

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水上爆破对碎石能量的影响

碎片能比是评估炸药是否得到有效利用的重要指标。本文从理论和数值模拟两方面探讨了水基爆破对碎裂能量的影响，并进行了三次爆破试验，以测量花岗岩基场的实际碎裂能量。结果表明，在相同的装药量下，水爆破的最大钻孔压力在理论上要比普通爆破大得多，这有利于破岩。在数值模拟中，水基爆破更有利于爆炸能量的传递。因此，损伤分布更均匀，损伤程度更高。通过现场测试中的三维激光扫描和图像分析获得比表面积和碎片尺寸分布。因此，可以测量碎裂能量，这表明在水基爆破中碎裂能量可以增加10％。此外，水基爆破可以减少飞石，确保爆破的安全性。