局部通(tong)(tong)風(feng)是指掘進工(gong)作(zuo)面(mian)的通(tong)(tong)風(feng)。在開采地下(xia)井巷(xiang)時，為(wei)了供給新鮮空氣、稀釋(shi)并排出掘進工(gong)作(zuo)面(mian)的煙、塵和有害氣體、創(chuang)造良好(hao)的作(zuo)業環境(jing)，可采用(yong)總風(feng)扭(niu)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)方法。
