LAUSR

Abstract There are many influencing factors for deep thermal environment, which will interact with each other. The analytic hierarchy process (AHP) and fuzzy comprehensive evaluation (FCE) are introduced to construct the evaluation model. Based on the comprehensive evaluation of the underground heat source and its thermal contribution rate, some suggestions on thermal stress control are put forward. The results showed that the average thermal contribution rates of surrounding rock, air self-compression, equipment, and personnel were 56.28%, 27.44%, 15.23% and 1.04%, respectively. SSD and HSI (heat stress index) of −652 m and deep workface are far higher than the maximum heat overload tolerated by human body. The nine evaluation indexes show that the degree of heat stress increases significantly with the increasing of depth. Among them, temperature, surrounding rock heat release and dress sensitivity are the main influencing factors of thermal environment evaluation. The severity of thermal stress was determined by comparing the difference in standard score and standard deep thermal environment parameters. Therefore, corresponding cooling technology is adopted to provide a new approach for deep thermal environment treatment.