局部通(tong)(tong)風(feng)(feng)是(shi)指掘進工作(zuo)面(mian)的(de)通(tong)(tong)風(feng)(feng)。在(zai)開采地(di)下(xia)井巷時(shi)，為了供給(gei)新(xin)鮮空氣、稀釋(shi)并(bing)排(pai)出掘進工作(zuo)面(mian)的(de)煙(yan)、塵和有害氣體、創造良好的(de)作(zuo)業環境，可(ke)采用(yong)總(zong)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(fa)。
