Thermophysical and design parameters of the personal protective equipment against general industrial pollution effecting the thermal comfort of the coal mines underground personnel are considered in the article.
Dependence was identified concerning the indicators of the employee thermal comfort on the category of work on the level of energy expenditure during mining operations in the personal protective equipment against general industrial pollution. The actual values of the energy expenditure level of the coal mines underground personnel are determined by the method based on fixing the heart rate. In assessing the employee thermal comfort, in addition to the microclimate parameters, it is required to consider thermal insulation of the used personal protective equipment. It was established that PMV (Predicted Mean Vote) indicator can be used when assessing the thermal comfort of the coal mines employees of various occupations in order to select suitable personal protective equipment.
Density of personal protective equipment contamination for the coal mines underground personnel of various professions during one shift was experimentally determined. Based on the obtained values the algorithm was developed concerning the samples contamination of the materials with coal dust with a given density for conducting experimental studies of the effect of special clothing material contamination on its thermal parameters. Change in the thermal resistance of the set of personal protective equipment depending on the density of its contamination with coal dust. The dependence of the thermal state of coal mine employees on the density of pollution by coal dust of the personal protective equipment used by them is revealed.
Topography of personal protective equipment contamination specific for various professions was determined. Design of the experimental sample of the personal protective equipment from the materials of different density with given parameters ensuring thermal comfort for the coal mines underground personnel performing category III works on the level energy expenditure is proposed.