局(ju)部(bu)(bu)通(tong)(tong)(tong)風(feng)是(shi)指(zhi)掘進工(gong)作(zuo)面的(de)通(tong)(tong)(tong)風(feng)。在開(kai)采(cai)地下井巷時，為了供(gong)給(gei)新鮮空氣(qi)、稀釋并排(pai)出掘進工(gong)作(zuo)面的(de)煙、塵和有害氣(qi)體、創(chuang)造良好的(de)作(zuo)業環境，可采(cai)用總(zong)風(feng)扭(niu)通(tong)(tong)(tong)風(feng)、擴散(san)通(tong)(tong)(tong)風(feng)、引射(she)器和局(ju)扇通(tong)(tong)(tong)風(feng)等局(ju)部(bu)(bu)通(tong)(tong)(tong)風(feng)方法(fa)。
