局部通(tong)(tong)(tong)風(feng)是指掘(jue)進(jin)工(gong)作面的通(tong)(tong)(tong)風(feng)。在(zai)開采(cai)地(di)下井巷時(shi)，為了供給新鮮空氣、稀(xi)釋并排出掘(jue)進(jin)工(gong)作面的煙、塵和(he)有害(hai)氣體、創造良好的作業環境，可采(cai)用總風(feng)扭通(tong)(tong)(tong)風(feng)、擴散通(tong)(tong)(tong)風(feng)、引射器和(he)局扇通(tong)(tong)(tong)風(feng)等(deng)局部通(tong)(tong)(tong)風(feng)方法。
