Excessive heat exposure is among the health and safety hazards that have adverse effects on the mine workers. The very nature of the underground climate makes it a convenient avenue for heat generation and accumulation from several heat sources including autocompression, equipment, and heat from strata. This study investigated the effects of clothing insulation and acclimation on the thermal comfort of mine workers who are exposed to heat in underground working environments. Several clothing ensembles have been considered to analyze the effect of the thermal resistance of clothing on the thermal comfort of workers. To investigate the impact of the clothing insulation, the thermal comfort limit of an underground miner was calculated in the form of maximum allowable exposure time for an 8-h shift. Parametric analyses were subsequently performed using an already developed thermal comfort model using MATLAB software. The results demonstrate that clothing insulation has a significant effect on the thermal comfort of mine workers. Increase in the clothing insulation decreases the maximum allowable exposure time of mine workers. This is especially true for the new and non-acclimated workers. Since acclimatized workers can tolerate a higher level of the dehydration and are capable of losing more water by sweat per shift, the maximum allowable exposure time for the acclimated workers are higher than non-acclimated workers. These analyses have shown that acclimated workers can have more continuous work per shift compared with non-acclimated workers. For example, in an environmental condition with clothing that a non-acclimated worker cannot work more than 5 h, an acclimated worker can work a full 8-h shift.

过度受热是对矿山工人产生不利影响的健康和安全隐患。地下气候的本质使其成为从多种热源（包括自动压缩，设备和地层热）产生和积累热量的便捷途径。这项研究调查了在地下工作环境中暴露于热量的矿工的隔热和适应对他们的热舒适性的影响。已经考虑过几种服装组合来分析服装的热阻对工人的热舒适性的影响。为了调查衣服绝缘的影响，地下采矿机的热舒适极限是以最大允许暴露时间（每班8小时）的形式计算的。随后使用已经开发的热舒适模型（使用MATLAB软件）进行参数分析。结果表明，服装隔热对矿山工人的热舒适性有重要影响。衣服隔热层的增加会减少矿山工人的最大允许暴露时间。对于新员工和非适应工人来说尤其如此。由于有适应能力的工人可以忍受更高水平的脱水，并且每次换班都能通过汗水流失更多的水分，因此有适应能力的工人的最大允许暴露时间比无适应能力的工人更长。这些分析表明，与无适应能力的工人相比，有适应能力的工人每班可进行更多的连续工作。例如，