结果给出坑道内通风次数及工作人员坑道内年工作时间上限的计算公式。
Results The calculating formal of ventilation time and upper limit of working hour in a year are given.
最后对实验数据进行了分析，发现地铁站内在日常运营时存在自然通风进出地铁站的现象，且计算出的换气次数能够满足地铁站人员所需的最低新风量要求。
Lastly, analyze the measured data, found that natural wind flow into and out the metro station within the daily operation period which could satisfy the lowest fresh air requirement.
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