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《Journal of China Coal Society》 2008-04
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Overpressure attenuation of shock wave during gas explosion

QU Zhi-ming1,ZHOU Xin-quan2,WANG Hai-yan2,MA Hong-liang2(1.School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;2.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology(Beijing),Beijing 100083,China)  
Combining with the theory of the conservation law of mass,momentum,energy and gas explosion dynamics,the attenuation law of shock wave in excavation roadway was deduced during gas explosion.The deduction shows that the maximum overpressure on the shock wave front is inversely proportional to the square root of the propagation distance and the roadway section,and in direct proportion to the square root of the accumulated volume of gas.Comparing the analysis between experiment and deduction,it is concluded that the theoretical data is fairly close to that of the experiment,which proves that the deduction of the overpressure on the shock wave front attenuating with the propagation distance is reasonable.
【Fund】: 国家重点基础研究发展计划(973)资助项目(2005CB221506);; 国家自然科学基金资助项目(50534090)
【CateGory Index】: TD712
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