局部通(tong)(tong)(tong)(tong)風(feng)是指掘進(jin)(jin)工(gong)(gong)作(zuo)(zuo)面的通(tong)(tong)(tong)(tong)風(feng)。在開采地(di)下井(jing)巷時，為了供給新鮮空氣(qi)、稀釋(shi)并排出(chu)掘進(jin)(jin)工(gong)(gong)作(zuo)(zuo)面的煙、塵和有害氣(qi)體、創造良好(hao)的作(zuo)(zuo)業(ye)環境，可(ke)采用總風(feng)扭通(tong)(tong)(tong)(tong)風(feng)、擴散(san)通(tong)(tong)(tong)(tong)風(feng)、引射(she)器(qi)和局扇(shan)通(tong)(tong)(tong)(tong)風(feng)等局部通(tong)(tong)(tong)(tong)風(feng)方法。
