气泡帷幕对水中冲击波衰减特性的数值模拟研究

Numerical Simulation Study of Attenuation Characteristics of Water Shock Wave under Bubble Curtain

为深入研究气泡帷幕在深水岩石爆破中减少爆破危害的机理,对深水岩石钻孔爆破中气泡帷幕对水中冲击波的衰减特性进行了理论分析,建立了气泡帷幕距离被保护目标分别为50 cm、250 cm、450 cm的三个简化深水岩石钻孔爆破数值模型,通过计算得到了相应的冲击波压力时程曲线,通过对峰值压力、比冲量等的分析得到了气泡帷幕对水中冲击波的衰减特性。本研究结果可为深水岩石钻孔爆破工程实践中的冲击波防护提供了参考。

To further study the mechanism of reducing blasting hazard by bubble curtain in deep rock blasting, a brief theoretical analysis on the attenuation characteristic of shock wave in water was conducted on the bubble curtain in deep rock drilling blasting, and three simplified deep rock drilling blasting numerical models were established, where the distance between the protected target and the bubble curtain was 50 cm,250 cm and 450 cm respectively. The corresponding shock wave pressure-time history curves were obtained, and through the analysis of the peak pres- sure and specific impulse, the attenuation feature of shock wave in water from the bubble curtain was also obstained. The results provides reference on entrench of shock wave in deep rock drilling blasting.