Abstract In order to study the effect of low-concentration coal dust on gas explosion characteristics and gas propagation law in gas transmission pipelines in the field of gas power generation, a gas explosion experiment with the participation of low-concentration coal dust was performed by using the self-developed experimental system for coal dust-gas mixture explosion. The results show that the addition of low-concentration coal dust raises the gas explosion pressure and explosion flame propagation speed. The volatile content of coal dust and gas content have a great influence on the law of explosion. When the gas concentration is 9.5%, After adding coal dust, the explosion flame speed reaches the detonation level under the influence of reflection wave. The experimental data and scientific analysis can provide guidance for gas explosion and prevention under coal mine.

中文翻译：

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低浓度煤尘对瓦斯爆炸传播规律的影响

摘要 为研究低浓度煤尘对燃气发电领域输气管道瓦斯爆炸特性及气体传播规律的影响，开展了低浓度煤尘参与的瓦斯爆炸试验。自主研发的煤尘-瓦斯混合物爆炸实验系统。结果表明，低浓度煤尘的加入提高了瓦斯爆炸压力和爆炸火焰传播速度。煤尘挥发分和瓦斯含量对爆炸规律有很大影响。当瓦斯浓度为9.5%时，加入煤粉后，在反射波的影响下，爆炸火焰速度达到爆轰水平。