局部(bu)通(tong)風(feng)(feng)是(shi)指(zhi)掘進(jin)(jin)工作(zuo)面(mian)的通(tong)風(feng)(feng)。在開(kai)采(cai)地下(xia)井巷(xiang)時，為了供給新鮮空(kong)氣、稀釋并排(pai)出掘進(jin)(jin)工作(zuo)面(mian)的煙、塵和有害氣體、創造良好的作(zuo)業環境，可采(cai)用總風(feng)(feng)扭通(tong)風(feng)(feng)、擴散通(tong)風(feng)(feng)、引(yin)射器(qi)和局扇(shan)通(tong)風(feng)(feng)等(deng)局部(bu)通(tong)風(feng)(feng)方法。
