巷道截面积突变情况下瓦斯爆炸冲击波传播规律的研究

Study on Propagation Rules about Gas Explosion Shock Wave in the Laneway with Abrupt Change of Sectional Area

瓦斯爆炸冲击波传播规律是研究冲击波的破坏和伤害机理的前提及依据,笔者利用流体动力学、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,建立巷道截面积突变情况下冲击波传播的数学模型,得到了冲击波波阵面压力和其他空气动力学参数的表达式,从而得到冲击波波阵面压力过巷道截面积突变面时的变化规律。研究成果丰富了瓦斯爆炸冲击波传播规律理论,对井下瓦斯爆炸安全评价以及制定防灾减灾措施提供了理论基础。

The propagation regulation of gas explosion shock wave is the basis and precondition to study the injury and damage mechanism of shock wave. In this paper, the propagation regulation of gas explosion shock wave in the laneway with abrupt change of sectional area is theoretically analyzed by use of the theory of flow dynamics and explosive dynamics ; the mathematical model for the shock wave propagation is established, and the formulations of shock wave front press and other aerodynamics parameters are gotten. Thus, the change rule of shock wave press is obtained. The outcomes enrich the propagation theory of shock wave and provide an academic basis for the safety assessment of gas explosion and the measure establishment of disaster prevention and reduction.