矿井瓦斯爆炸高速气流的破坏和伤害特性研究

针对煤矿瓦斯爆炸事故频发现状,基于爆炸动力学、流体动力学理论对巷道受限空间瓦斯爆炸冲击波波阵面后高速气流的传播特性进行分析,建立高速气流压力和速度关系的数学模型。结合在实验巷道中瓦斯爆炸高速气流压力实验数据,拟合瓦斯爆炸高速气流速度和传播距离的计算公式,其结果表明,井下瓦斯爆炸事故高速气流的传播速度随传播距离的增加而减小。依据我国陆地地面风力等级划分标准比照可得瓦斯爆炸高速气流的等级为飓风级,对井下人员伤害巨大。该研究成果为控制和预防瓦斯爆炸破坏和伤害事故扩大及事故应急救援提供了理论依据。

Study on the Damaging Characteristics of High-speed Air Flow Produced by Gas Explosion in Coal Mines

Based on the theory of hydrodynamics and flow dynamics,the propagation rule of high-speed airflow in confined space was analyzed,and its mathematics model was set up.Through applying the experimental pressure data of high-speed airflow produced by gas explosion in experimental laneway,the speed and distance formulas of high-speed airflow were fitted.The results show that the spread speed of high-speed airflow under mines will reduce with the increase of the spread distance.According to China's land wind classification standard,the intensity of high-speed airflow can be ranked in hurricane level.The study achievements provide theoretical basis for the prevention and control of gas explosion and emergency rescue.