大同矿务局永定庄矿是个具有7（）年开采历史、拥有万余名职工的大矿、老矿。近几年来，随着矿井生产向西部挺进，安全生产亦遇到了前所未有的困难。为此，矿领导班子始终坚持“安全第一，预防为主”的方针，做到“三变三不变”，即无论外界环境怎么变，安全第一、预防为主的思想不 Datong Mining Bureau Yongdingzhuang Mine is a large mine with an annual mining history of 7 years and 10,000 workers. In recent years, as mine production has advanced to the west, safety in production has also encountered unprecedented difficulties. To this end, the mine leadership has always adhered to the principle of “safety first, prevention first” and “three changes and three changes”, that is, no matter how the external environment changes, safety first and prevention first Do not