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为研究地面放空管道内瓦斯爆炸的转播特性,模拟地面放空管道内瓦斯的爆炸环境,对管道内气体的爆炸极限、爆炸压力和爆炸火焰传播速度等进行实验分析。结果表明,在实验管道内,爆炸冲击波冲量在爆炸初期逐渐增大,达到最大值后,又逐渐减小,在靠近实验管道开口位置,冲量又突然增大。爆炸压力随实验管道的延长而增大,在靠近实验管道的开口端达到最大值。瓦斯浓度低于9%时,爆炸火焰传播速度随浓度降低而减小;瓦斯浓度高于11%时,火焰传播速度随浓度增大而减小。
In order to study the relaying characteristics of gas explosion in the ground vent pipe, the explosion environment of the gas in the ground vent pipe was simulated, and the explosion limit, explosion pressure and propagation speed of the flame were experimentally analyzed. The results show that in the experiment pipe, the impulse of explosion shock wave increases gradually in the early stage of explosion, and then decreases gradually after reaching the maximum value. The impulse suddenly increases near the opening of experimental pipe. The explosion pressure increases with the extension of the experimental pipe and reaches the maximum near the open end of the experimental pipe. When the gas concentration is lower than 9%, the propagation velocity of the explosion flame decreases as the concentration decreases. When the gas concentration is higher than 11%, the flame propagation velocity decreases with increasing concentration.