In order to study the influences of coal dust components on the explosibility of hybrid mixture of methane and coal dust, four kinds of coal dust with different components were selected in this study. Using the standard 20 L sphere, the maximum explosion pressure, explosion index and lower explosion limits of methane/coal dust mixtures were measured. The results show that the addition of methane to different kinds of coal dust can all clearly increase their maximum explosion pressure and explosion index and decrease their minimum explosion concentration. However, the increase in the maximum explosion pressure and explosion index is more significant for coal dust with lower volatile content, while the decrease in the minimum explosion concentration is more significant for coal dust with higher volatile content. It is concluded that the influence of methane on the explosion severity is more pronounced for coal dust with lower volatile content, but on ignition sensitivity it is more pronounced for coal dust with higher volatile content. Bartknecht model for predicting the lower explosion limits of methane/coal dust mixture has better applicability than Le Chatelier model and Jiang model. Especially, it is more suitable for hybrid mixtures of methane and high volatile coal dust.

为了研究煤尘成分对甲烷与煤尘混合混合物爆炸性的影响，本研究选择了四种成分不同的煤尘。使用标准的20 L球体，测量了甲烷/煤尘混合物的最大爆炸压力，爆炸指数和爆炸下限。结果表明，在不同类型的煤粉中加入甲烷都可以明显提高其最大爆炸压力和爆炸指数，并降低其最小爆炸浓度。但是，对于挥发分含量较低的煤尘，最大爆炸压力和爆炸指数的增加更为显着，而对于挥发分含量较高的煤尘，最小爆炸浓度的降低更为显着。结论是，挥发分含量较低的煤尘，甲烷对爆炸强度的影响更为明显，而挥发分含量较高的煤尘，对燃烧敏感性的影响更为明显。与Le Chatelier模型和Jiang模型相比，用于预测甲烷/煤尘混合物爆炸下限的Bartknecht模型具有更好的适用性。特别是，它更适合于甲烷和高挥发性煤尘的混合混合物。