局部通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)是(shi)指掘進工(gong)作面的通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)。在開采(cai)(cai)地下井巷時，為了供給新鮮空(kong)氣、稀釋并排出掘進工(gong)作面的煙、塵和有(you)害氣體(ti)、創造良好的作業環境，可采(cai)(cai)用(yong)總風(feng)(feng)(feng)(feng)(feng)扭(niu)通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)、擴散(san)通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)、引(yin)射器和局扇(shan)通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)等局部通(tong)(tong)(tong)風(feng)(feng)(feng)(feng)(feng)方法(fa)。
