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防止煤矿瓦斯爆炸一直是人们十分重视的问题,因为它关系到煤矿生产和工人的生命安全。为了解决和预防瓦斯爆炸事故,已经形成了一个专门的学科,称为防爆技术。长期以来,井下绝大部分的瓦斯点燃事故多由电火花引起。因此,在人们的概念中,防爆技术是指电气设备而言的。但是,随着采煤机械化的发展,摩擦火花引燃瓦斯的事故发生并日益增多了,防爆技术的概念也相应被人们扩大了。电气火花的防爆一般都可以用隔爆外壳将它“包”起来,然而摩擦火花就无法采用“包”的办法解决。国外对摩擦火花的防爆问
Prevention of gas explosion in coal mines has always been a problem of great importance because it is related to coal mine production and the safety of workers. In order to solve and prevent gas explosion accidents, a special discipline has been formed, called explosion-proof technology. For a long time, most of the underground gas ignition accidents caused by sparks. Therefore, in people’s concept, explosion-proof technology refers to the electrical equipment. However, with the development of mechanization of coal mining, the accident caused by friction spark ignited and occurred more and more, the concept of explosion-proof technology has correspondingly been expanded. Electric spark explosion-proof shell can generally use it to “pack” it up, but the friction spark can not be used “package” approach to solve. Foreign explosion on the friction spark asked