局部通(tong)(tong)(tong)風(feng)(feng)是指掘(jue)進工作(zuo)面(mian)(mian)的通(tong)(tong)(tong)風(feng)(feng)。在開采(cai)地下井巷時，為了供給新鮮空氣、稀釋(shi)并(bing)排出(chu)掘(jue)進工作(zuo)面(mian)(mian)的煙、塵和(he)有(you)害氣體、創造良好的作(zuo)業環境，可采(cai)用總風(feng)(feng)扭通(tong)(tong)(tong)風(feng)(feng)、擴散通(tong)(tong)(tong)風(feng)(feng)、引射(she)器和(he)局扇通(tong)(tong)(tong)風(feng)(feng)等局部通(tong)(tong)(tong)風(feng)(feng)方法。
