局(ju)部通(tong)(tong)(tong)(tong)風(feng)(feng)是(shi)指掘進工(gong)作面的通(tong)(tong)(tong)(tong)風(feng)(feng)。在開采(cai)(cai)地(di)下井巷(xiang)時，為了供給新鮮空(kong)氣、稀釋(shi)并排出掘進工(gong)作面的煙、塵和(he)有害氣體、創(chuang)造良(liang)好(hao)的作業環(huan)境，可采(cai)(cai)用總風(feng)(feng)扭通(tong)(tong)(tong)(tong)風(feng)(feng)、擴散通(tong)(tong)(tong)(tong)風(feng)(feng)、引射器和(he)局(ju)扇通(tong)(tong)(tong)(tong)風(feng)(feng)等局(ju)部通(tong)(tong)(tong)(tong)風(feng)(feng)方法。
