局部(bu)通(tong)(tong)風(feng)(feng)(feng)是指(zhi)掘進工(gong)作(zuo)面的通(tong)(tong)風(feng)(feng)(feng)。在(zai)開(kai)采地下井巷(xiang)時，為了供給新(xin)鮮空氣(qi)(qi)、稀釋并排出掘進工(gong)作(zuo)面的煙(yan)、塵和有害氣(qi)(qi)體、創(chuang)造良好的作(zuo)業環境，可采用(yong)總(zong)風(feng)(feng)(feng)扭(niu)通(tong)(tong)風(feng)(feng)(feng)、擴散通(tong)(tong)風(feng)(feng)(feng)、引射(she)器(qi)和局扇通(tong)(tong)風(feng)(feng)(feng)等(deng)局部(bu)通(tong)(tong)風(feng)(feng)(feng)方(fang)法。
