Study on the influence of thermal environment on miners ' physiological and cognitive ability in deep mining face

In order to reduce the impact of heat damage and reduce the incidence of accidents, this study will conduct regression analysis and cognitive ability test to quantify the relationship between temperature level and miners' physiological state, and monitor the impact of temperature on miners ' cognitive ability and working state.

Controlling different temperature levels as variables, with the help of PhysioPlux physiological recorder, two physiological indexes of heart rate variability and skin electricity were selected to study the physiological changes of miners caused by different temperature levels, and the influence of temperature on cognitive ability was studied based on cognitive ability test.

(1) With the increase of temperature, the HRV time domain indexes RMSSD and SDNN of the subjects increased at different rates. When the temperature was increased again, the two physiological indexes decreased at a faster rate within the normal range. The skin conductance SC value of the subjects increased with the increase of temperature, the linear regression equation between different temperature levels and RMSSD / SC was established. (2) The cognitive response speed increases first and then slows down with the increase of temperature. The cognitive accuracy AC decreases with the increase of temperature. The increase of temperature reduces the cognitive ability.

Determining the physiological threshold and monitoring the status of coal miners is helpful to establish an underground safety early warning system and minimize the risk of coal mine accidents.