局部通(tong)(tong)(tong)風(feng)(feng)是指(zhi)掘進(jin)(jin)工作(zuo)面的(de)(de)通(tong)(tong)(tong)風(feng)(feng)。在開采地下井巷(xiang)時，為了供給新(xin)鮮空氣、稀(xi)釋并排出掘進(jin)(jin)工作(zuo)面的(de)(de)煙、塵和(he)有害氣體、創造(zao)良好的(de)(de)作(zuo)業環境(jing)，可(ke)采用總風(feng)(feng)扭通(tong)(tong)(tong)風(feng)(feng)、擴散(san)通(tong)(tong)(tong)風(feng)(feng)、引射器和(he)局扇通(tong)(tong)(tong)風(feng)(feng)等局部通(tong)(tong)(tong)風(feng)(feng)方法。
