Citation

Nie X, Feng S, Zhang S, Gan Q. China Saf. Sci. J. 2020; 30(1): 180-186.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.01.028

PMID

unavailable

Abstract

In order to help address problems of poor ventilation and waste of ventilation energy consumption in high-altitude mines, dynamic thermal comfort evaluation for operators was conducted through a modified PMV model. Firstly hourly thermal comfort on mine surface was calculated according to meteorological parameter information of typical working days, and a control chart of it was generated. Then, an underground PMV model was established to obtain control curves of natural thermal environment underground, which reflected changes of operators' thermal comfort in real time. The results show that comfort of surface environment is slightly cooler during 12:00-19:00, cooler during 7:00-12:00 and 19:00-3:00, and cold during 3:00-7:00. The PMV model tested and verified by experiments is suitable for high-altitude and low-pressure environment. After optimization, underground thermal comfort at 0:00-12:00 and 18:00-0:00 is neutral, and it is slightly warmer at 12:00-18:00. Optimized underground thermal comfort index is closer to optimal value of human thermal comfort. © 2019 China Safety Science Journal

Language: zh