一、事故概况原天府煤矿北井,现天府矿务局刘家沟矿350m 水平北翼7号石门 K_2煤层三顺槽16风眼,于1977年9月21日～10月2日由于内因火灾引起瓦斯爆炸。该矿井为高瓦斯矿井,绝对瓦斯涌出量为28.61m~3/min。煤尘爆炸指数为29.6%。煤层厚度为3.5m,煤层倾角60～65°。煤层正常时用掩护支架采煤法,此次事故区域因煤厚20多米,是搞的巷采,采用中央兼并列式通风系统。煤的自然发火期为1～3个月。 First, the accident profile Tianfu coal mine north well, now Tianfu Mining Bureau Liujiagou Mine 350m level north wing on the 7th Shimen K_2 seam three cistern 16 wind eye, in the September 21, 1977 ~ October 2 due to internal fire caused Gas explosion. The mine is a high-gas mine with an absolute gas emission of 28.61m 3 / min. Coal dust explosion index was 29.6%. Coal seam thickness of 3.5m, coal seam angle of 60 ~ 65 °. Seam support normal mining coal mining method, the accident area due to coal thickness of more than 20 meters, is engage in the laneway mining, the central annex with the ventilation system. Spontaneous combustion of coal for 1 to 3 months.