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我国黄河以北,冬季气候寒冷,特别是东北边疆地区严冬结冰期长达半年之久,最低气温达零下35～39℃.在冰天雪地的严寒季节里,矿井主扇反风系统的防寒问题过去一直没有很好解决.由于主扇房和反风门一般无专用的采暖系统,反风门常常暴露在冷空气中,因冷热温差,风门结冰严重,反风门不能灵活打开,一旦井下发生恶性火灾需立即反风时将起不到应有的保安作用.1979年2月15日,吉林省某煤矿因入风井变电所着火,反风装置被冻结,风门打不开,不能及时反风,致使数十名矿工遇难.因此,反
North of China’s Yellow River, the winter climate is cold, especially in the northeast border regions of severe winter freezing period of up to six months, the minimum temperature of minus 35 ~ 39 ℃ in the icy and snowy cold season, mine main fan anti-wind system in the past Has been not well resolved.Because the main fan room and the anti-wind door generally does not have the special heating system, the anti-wind door is often exposed to the cold air, because of the hot and cold temperature difference, the door freeze serious, the anti-wind door can not open flexibly, Will be immediately anti-wind will not be able to play its due security role .1999 February 15, Jilin coal mine into the air due to substation fire, the anti-wind device is frozen, the damper can not be opened, can not be timely anti-wind , Resulting in the death of dozens of miners