摘要
基于弱冲击波理论,根据瓦斯爆炸释放的能量,推导出爆炸冲击波传播过程中超压与爆源点距离之间的衰减关系,得到冲击波参数随传播距离的衰减规律以及冲击波传播距离和时间存在的非线性关系.全尺寸实验与理论计算的对比结果表明,理论数据与实验结果基本吻合,证明了冲击波超压随距离衰减公式的合理性.应用研究结果分析了瓦斯爆炸后冲击波影响范围,认为小型瓦斯爆炸只是破坏局部通风系统,而大型瓦斯爆炸,或者瓦斯爆炸过程中有煤尘等参与会造成极大的灾害.
According to the energy released by explosion, the attenuation relation between shock-wave overpressure and the distance from the explosion point was deduced in weak shock wave. Thus, the relation between shock-wave parameters attenuation law and transmission distance and non-linearity relation between shock-wave transmission distance and time were obtained. Comparing the analysis between full scale experiments and deduction, the results of theoretical calculation agree well with those of experiments, which proves that the deduction of the overpressure on the shock wave front attenuating with the propagation distance is reasonable. The influential scope of damage effect by shock wave was theoretically analyzed by using the results of research works above. So the following conclusion can be got： a small explosion can destroy partial ventilation system, while the large-scale explosion with taking part in of coal dust sometimes can bring the tremendous disaster to life and property.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第6期778-782,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)基金资助项目(2005CB221506)
"十一五"国家科技支撑计划(2006BAK03B05)
国家自然科学基金重点资助项目(50534090)
关键词
瓦斯爆炸
冲击波
衰减规律
超压
gas explosion
shock wave
attenuation law
overpressure
