煤(Mei)炭(Tan)开(Kai)采(Cai)中(Zhong)会(Hui)用(Yong)到(Dao)采(Cai)煤(Mei)机(Ji)、(?)掘(Jue)进(Jin)机(Ji)、(?)运(Yun)输(Shu)机(Ji)械(Xie)、(?)水(Shui)泵(Beng)和(He)风(Feng)机(Ji)，(?)电(Dian)动(Dong)机(Ji)是(Shi)这(Zhe)些(Xie)设(She)备(Bei)的(De)动(Dong)力(Li)之(Zhi)源(Yuan)。(?)由(You)于(Yu)煤(Mei)炭(Tan)的(De)可(Ke)燃(Ran)性(Xing)以(Yi)及(Ji)矿(Kuang)井(Jing)中(Zhong)富(Fu)含(Han)各(Ge)种(Zhong)爆(Bao)炸(Zha)性(Xing)气(Qi)体(Ti)，(?)用(Yong)户(Hu)选(Xuan)择(Ze)电(Dian)动(Dong)机(Ji)时(Shi)往(Wang)往(Wang)把(Ba)可(Ke)靠(Kao)性(Xing)和(He)安(An)全(Quan)性(Xing)放(Fang)在(Zai)首(Shou)位(Wei)。(?)