局部通(tong)(tong)風(feng)(feng)(feng)是(shi)指掘進(jin)(jin)工作面的(de)通(tong)(tong)風(feng)(feng)(feng)。在開采地下井巷時，為了供給新鮮空氣、稀釋并排(pai)出掘進(jin)(jin)工作面的(de)煙、塵和(he)有害氣體、創(chuang)造良(liang)好的(de)作業環(huan)境，可采用總風(feng)(feng)(feng)扭(niu)通(tong)(tong)風(feng)(feng)(feng)、擴散通(tong)(tong)風(feng)(feng)(feng)、引射器和(he)局扇通(tong)(tong)風(feng)(feng)(feng)等局部通(tong)(tong)風(feng)(feng)(feng)方(fang)法。
