局(ju)部通(tong)(tong)風(feng)(feng)(feng)(feng)是(shi)指(zhi)掘進(jin)工作面的通(tong)(tong)風(feng)(feng)(feng)(feng)。在開采地下井巷(xiang)時，為了供給新鮮空氣、稀釋并(bing)排出(chu)掘進(jin)工作面的煙、塵和(he)有害氣體、創造良好的作業環境(jing)，可(ke)采用總風(feng)(feng)(feng)(feng)扭通(tong)(tong)風(feng)(feng)(feng)(feng)、擴(kuo)散通(tong)(tong)風(feng)(feng)(feng)(feng)、引(yin)射器和(he)局(ju)扇通(tong)(tong)風(feng)(feng)(feng)(feng)等局(ju)部通(tong)(tong)風(feng)(feng)(feng)(feng)方法(fa)。
