Material Evidence Analysis upon Accident Investigation of Gas and Coal Dust Explosion

The gas and coal dust explosion accident is one of the most frequent and serious accidents in China coal mine. Based on explosion characteristics parameters after explosion and the change laws of gas and solid components, the comprehensive criteria of the determination of accident property and explosion source point in explosion accident investigation was put forward. The research of this paper provides theoretical basis for the inversion process of mine explosion accidents and material evidence analysis of explosion accident investigation. There are also important reference significance on the research of laws of gas and coal dust explosion.