大足县煤管局奖励“五消灭”小矿四川大足县大多数乡镇煤矿井下至今仍采用原始的自然通风，风量差，每年都要发生三、五起瓦斯事故，造成人员死伤和惨重的损失。为了加快实现机械通风，达到“五消灭”（消灭明火照明、明火放炮、明刀闸开关、自然通风、独眼井），杜绝瓦斯... Dazu County Coal Authority rewards “five to eliminate” small mines Dazu County, Sichuan Province most of the township coal mine is still using the original natural ventilation, poor air flow, every year to occur three or five gas accidents, causing casualties and heavy losses. In order to speed up the realization of mechanical ventilation, to achieve “five elimination” (eradication of open flame lighting, open flame blasting, Ming knife switch, natural ventilation, one-eyed well), eliminate gas ...