局部通(tong)(tong)風(feng)(feng)是指掘進工作面的通(tong)(tong)風(feng)(feng)。在開采地下井巷時，為了供(gong)給新鮮空氣(qi)、稀釋并排出掘進工作面的煙、塵和有害(hai)氣(qi)體(ti)、創造良好的作業環(huan)境(jing)，可采用總風(feng)(feng)扭通(tong)(tong)風(feng)(feng)、擴散通(tong)(tong)風(feng)(feng)、引射器和局扇通(tong)(tong)風(feng)(feng)等局部通(tong)(tong)風(feng)(feng)方法。
