径向水耦合爆破爆轰波动效应分析  

Analysis of detonation wave effect in radial water coupling blasting

作　　者：王雁冰[1] 孔维文 汪东宸 申有义 冯阿建 李杨[1] 郑文海 WANG Yanbing;KONG Weiwen;WANG Dongchen;SHEN Youyi;FENG Ajian;LI Yang;ZHENG Wenhai(School of Mechanics and Architecture Engineering,China University of Mining and Technology-Beijing,Beijing,100083,China;Key Laboratory of Monitoring and Protection of Natural Resources in Mining Cities,Ministry of Natural Resources,Jinzhong 030600,China;Shanxi Coal Geophysical Ex-ploration and Mapping Institute Co.,Ltd.,Jinzhong 030600,China)

机构地区：[1]中国矿业大学(北京)力学与土木工程学院,北京100083 [2]自然资源部矿业城市自然资源调查监测与保护重点实验室,山西晋中030600 [3]山西省煤炭地质物探测绘院有限公司,山西晋中030600

出　　处：《煤炭学报》2024年第S2期782-799,共18页Journal of China Coal Society

基　　金：国家重点研发计划资助项目(2021YFC2902103);国家自然科学基金重点资助项目(51934001);中央高校基本科研业务费专项资金资助项目(2023JCCXLJ02)。

摘　　要：为研究不同水耦合系数及耦合形式对爆破效果的影响,通过理论推导和高速纹影实验并结合AUTODYN数值模拟,分析爆轰流场演化过程,推导得到了水介质耦合爆破时同心与偏心2种耦合形式的炮孔孔壁压力;设计了不同水耦合系数和耦合形式下的5种药包,通过纹影实验并结合数值模拟得到了炸药内部的爆轰波动过程,对比分析5种情况下冲击波的压力变化、冲击波的传播及能量传递效率。结果表明:水耦合系数及耦合形式很大程度地影响了爆炸能量的传递效率,且存在最优不耦合系数,并不能一味地增大水不耦合系数。由于水耦合系数及耦合形式不同,冲击波传递到自由空气场中时蕴含的爆炸能量有所差别,进而影响峰值压力的大小。随着水耦合系数的增大炮孔孔壁压力先增大后减小,能量传递效率先减小后增大再减小;由于水介质的存在,水耦合装药爆破可以有效延长冲击波作用时间,提高能量传递效率;相比于同心水耦合装药形式,偏心水耦合装药存在明显的偏心应力场,可以显著提高耦合侧的孔壁峰值压力,减小能量的衰减效率,提高了能量利用率,耦合侧的爆破效果优于同心耦合时的爆破效果。研究成果对于水耦合装药爆破应用于边坡开挖、隧道周边爆破,改善爆破效果,具有一定的理论指导意义和参考价值。To study the influence of different water coupling coefficients and coupling forms on the blasting effect,theoretical derivation and high-speed schlieren experiments were conducted,combined with AUTODYN numerical simulation,to analyze the evolution process of the detonation flow field.The wall pressure of the blast hole in two coupling forms of concentric and eccentric during water medium coupling blasting was derived;Five types of explosive packages with different water coupling coefficients and coupling forms were designed.The detonation wave process inside the explosive was obtained through schlieren experiments and numerical simulations.The pressure changes,propagation,and energy transfer efficiency of the shock wave were compared and analyzed under these five conditions.The results indicate that the water coupling coefficient and coupling form greatly affect the transmission efficiency of explosion energy,and there is an optimal decoupling coefficient that cannot be blindly increased.Due to the different water coupling coefficients and forms,the explosion energy contained in the transmission of shock waves into the free air field varies,which in turn affects the magnitude of peak pressure.As the water coupling coefficient increases,the pressure on the borehole wall first increases and then decreases,and the energy transfer efficiency first decreases,then increases and then decreases;Due to the presence of water medium,water coupled charge blasting can effectively extend the duration of shock wave action and improve energy transfer efficiency;Compared to the concentric water coupling charge form,the eccentric water coupling charge has a significant eccentric stress field,which can significantly increase the peak pressure of the hole wall on the coupling side,reduce the energy attenuation efficiency,and improve the energy utilization rate.The blasting effect on the coupling side is better than that on the concentric coupling.The research results have certain theoretical guidance and reference value for the app

关 键 词：高速纹影 水耦合系数 偏心水耦合 孔壁压力 能量传递 AUTODYN 

分 类 号：TB41[一般工业技术]