中文摘要：

煤矿瓦斯爆炸事故往往会造成大量人员伤亡和财产损失，针对煤矿瓦斯爆炸事故频繁发生的现状。研究瓦斯爆炸冲击波传播规律，对于预防和控制冲击波的破坏和伤害效应有重要的意义。利用爆炸动力学理论。对巷道截面积突变情况下瓦斯爆炸冲击波传播规律进行理论分析，并建立巷道截面积突变情况下冲击波传播的数学模型，得到冲击波波阵面压力经过巷道截面积突变面时的变化规律。

英文摘要：

The gas explosive may occur in coal mines, with plenty of personal casualties and enormous property loss. Therefore, it is important to study shock waves of gas explosive for preventing and controlling its injury and damage effect, where the propagation of shock wave plays a basic role. A mathematical model of shock wave propagation is proposed in this paper. The wave surface pressure and other aerodynamics parameters are obtained, especially when the shock wave front passes the section of the laneway with sudden change of area. The results may help the safety assessment of gas explosion and the establishment of hazard protection and reduction measures.