根据黑龙江七台河东风煤矿第一采煤区的工人全部死亡,第二、第三采煤区工人部分生存,且后者入口对着发生煤尘爆炸的出煤巷道的入口的事实,推论东风煤矿爆炸不是单纯煤尘爆炸,而是第一采煤区首先发生瓦斯爆炸,爆炸喷出的火焰扬起并引燃出煤巷道地面与墙上的煤尘,诱发严重的煤尘爆炸。第一采煤区首先发生的瓦斯爆炸与今年发生的另两次瓦斯爆炸起因是一样的,都是由于轻度瓦斯突出,受加强加大的通风的负(反)作用造成的。 According to the fact that all the workers in the first coal mining area of ​​Dongfeng Coal Mine in Heilongjiang Province died and the workers in the second and third coal mining areas survived and the entrance was facing the entrance to the coal roadway where the coal dust explosion occurred, Coal mine explosion is not a mere coal dust explosion, but the first coal mining area first gas explosion, explosion erupted flame raised and ignited coal roadway surface and wall of coal dust, induced serious coal dust explosion. The first gas explosion in the first coal mining area is the same as the other two gas explosions that occurred this year, all of them due to the negative (anti) effects of light gas outburst and enhanced ventilation.