局部通(tong)(tong)風(feng)是(shi)指掘進(jin)工作(zuo)面的通(tong)(tong)風(feng)。在開采(cai)地下井巷時，為了供給新鮮空氣、稀釋并排出(chu)掘進(jin)工作(zuo)面的煙(yan)、塵和有害(hai)氣體(ti)、創造(zao)良(liang)好的作(zuo)業環(huan)境，可(ke)采(cai)用總風(feng)扭通(tong)(tong)風(feng)、擴散通(tong)(tong)風(feng)、引射器和局扇通(tong)(tong)風(feng)等(deng)局部通(tong)(tong)風(feng)方(fang)法。
