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井巷通风阻力包括摩擦阻力和局部阻力两部分(有的文献将局部阻力中由矿车或巷道堆积物造成的通风阻力列为正面阻力),一般矿井局部阻力只占矿井总阻力的10～20%,个别矿井可占总阻力的50%,因此,矿井通风中的局部阻力是一个不可忽视的问题。在新井设计时,井巷的局部阻力一般不作单独计算,只计算摩擦阻力然后乘以大于
Ventilation resistance of shaft includes frictional resistance and partial resistance (some literature lists the resistance of drag in the partial resistance as positive resistance caused by the deposit of mine car or roadway). The general resistance of mine generally accounts for 10-20 of the total resistance of the mine %, Individual mine can account for 50% of the total resistance, therefore, local resistance in mine ventilation is a problem that can not be ignored. In the new well design, the local resistance of the shaft is generally not calculated separately, only the friction resistance is calculated and then multiplied by more than