TY - JOUR N2 - The article discusses changes in Polish regulations concerning assessment of the climate hazard in underground mines. Currently, the main empirical index representing the heat strain, used in qualification of the workplace to one of the climate hazard levels in Poland is the equivalent climate temperature. This simple heat index allows easy and quick assessment of the climate hazard. To a major extent, simple heat indices have simplifications and are developed for a specific working environments. Currently, the best methods used in evaluation of microclimate conditions in the workplace are those based on the theory of human thermal balance, where the physiological parameters characterising heat strain are body water loss and internal core temperature of the human body. The article describes the results of research on usage of equivalent climate temperature to heat strain evaluation in underground mining excavations. For this purpose, the numerical model of heat exchange between man and his environment was used, taken from PN-EN ISO 7933:2005. The research discussed in this paper has been carried out considering working conditions and clothing insulation in use in underground mines. The analyses performed in the study allowed formulation of conclusions concerning application of the equivalent climate temperature as a criterion of assessment of climate hazards in underground mines. L1 - http://czasopisma.pan.pl/Content/109032/PDF/Archiwum-63-4-13-Gluch.pdf L2 - http://czasopisma.pan.pl/Content/109032 PY - 2018 IS - No 4 EP - 988 DO - 10.24425/ams.2018.124988 KW - evaluation of microclimate conditions KW - climate hazard KW - underground mines KW - equivalent climate temperature KW - predicted heat strain model KW - PHS model A1 - Głuch, Bartłomiej PB - Committee of Mining PAS VL - vol. 63 DA - 2018.12.17 T1 - Equivalent Climate Temperature Analysis as a Criterion of Climate Hazard Evaluation in Polish Underground Mines SP - 975 UR - http://czasopisma.pan.pl/dlibra/publication/edition/109032 T2 - Archives of Mining Sciences ER -