Among gas accidents, gas explosion, gas asphyxiation, toxic, outburst of coal and gas can cause casualties, destruction of facilities and properties.

• 在瓦斯事故中，瓦斯爆炸、瓦斯窒息及中毒、谋与瓦斯突出事故往往会造成严重的人员伤亡和财产损失。