局(ju)部通(tong)(tong)風(feng)(feng)是指掘(jue)進(jin)工作(zuo)面的(de)通(tong)(tong)風(feng)(feng)。在開采地下井巷時，為了供(gong)給新鮮空氣、稀釋(shi)并排出掘(jue)進(jin)工作(zuo)面的(de)煙、塵和有(you)害(hai)氣體、創造(zao)良好的(de)作(zuo)業環境，可采用總風(feng)(feng)扭(niu)通(tong)(tong)風(feng)(feng)、擴散通(tong)(tong)風(feng)(feng)、引射器(qi)和局(ju)扇通(tong)(tong)風(feng)(feng)等局(ju)部通(tong)(tong)風(feng)(feng)方法。
