爆炸冲击波在不同断面竖井中的传播规律研究

Study on Propagation Law of Blast Wave in Vertical Shafts with Different Sections

摘要: 为探明爆炸冲击波在竖井内的传播规律,利用ANSYS/LS-DYNA动力分析软件,对4.8 kg乳化炸药在竖井内的爆炸过程进行数值模拟,分析了冲击波在长宽比相同、断面大小不同的3个竖井内轴向与径向的传播规律。结果表明:在竖井轴向,爆心距大于6 m后,不同断面的竖井衰减速度不同,小、中、大竖井每2 m平均衰减率分别为25.02%、26.29%、32.32%;在竖井径向,冲击波由球面波转别为平面波的速度随着断面的增大而加快。
- 爆炸 /
- 竖井 /
- 冲击波 /
- 超压 /
- ALE算法 /
- 衰减
Abstract: In order to find out the propagation laws of explosive shock wave in shaft, the explosion process of 4.8 kg emulsion explosive in shaft was simulated by ANSYS/LS-DYNA software. The axial and radial propagation laws of shock wave in three shafts with the same aspect ratio and different section sizes were analyzed. The results show that the attenuation rates of the shafts with different sections are different when the detonation centers of the shaft in axial direction is greater than 6 m, and the average attenuation rate of each shaft per 2 m is 25.02%, 26.29% and 32.32%. In the radial direction of the shaft, the velocity of the shock wave from spherical wave to plane wave increases with the increase of the section.
- blasting /
- shaft /
- shock-wave /
- overpressure /
- ALE algorithm /
- attenuation

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