Effect of Heat on Underground Mine Workers

Maurya, Tripti; Karena, Kailash; Vardhan, Harsha; Aruna, M.; Raj, M. Govinda

doi:10.1016/j.proeps.2015.06.049

Cited by 37 publications

(21 citation statements)

References 2 publications

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“…Previous studies clarified that the thermal conditions, such as ambient air temperature, radiant temperature, humidity, air speed, have great influence on heat stress [9][10][11][12]. From the site measurement, it is observed that the radiant temperature and air speed in the working face change slightly.…”

Section: Effects Of Working Thermal Conditionsmentioning

confidence: 99%

“…As far as we know, experimental studies in laboratory on evaluating heat stress in the working face of hot coal mines are rare, which is mainly on simulating a steady thermal condition [9], since it is of great difficulty in setting up a quite similar variable thermal condition (cool-hot changing along the working face) in the laboratory, and the field measurement work is relatively scarce as it is quite hard to measure and acquire accurate miners' physiological response data on site [2]. In the past decades, heat stress indices, and mathematical thermoregulation models have been becoming popular to investigate heat strain problems of miners [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al used the PHS model to analyze the thermophysiological responses of miners under a variety of hot and humid conditions, and also determined accepted maximum exposed working time [22]. However, these existing models or heat stress indices for evaluating heat stress in hot mines have generally focused on steady-state conditions, and there are currently no models that address miners' physiological responses to cool-hot changing (unsteady or step-change) thermal conditions along the working face [11,18,19]. In addition, these existing models primarily evaluate heat strain and the sensation of the entire body, and cannot address local thermal analysis.…”

Section: Introductionmentioning

confidence: 99%

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Heat stress evaluation at the working face in hot coal mines using an improved thermos physiological model

Wu¹,

Fu²,

Tong³

et al. 2017

IJHT

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With the increasing mining depths and the improving mining mechanization, coal miners in China have been exposed to increasingly hotter working conditions, especially in the working face where heat hazards are of high possibility. In this paper, a multi-segment thermos physiological model with an improvement in heat and moisture transfer through clothing was used to evaluate heat stress at the working face in hot coal mines. The improved thermos physiological model was firstly demonstrated with miners' thermal response data collected by field measurements, and then parametric simulations were done to evaluate the physiological influences of the relative humidity and the unsteady (cool-hot changing) air temperature along the working face. It is found that the cool-hot changing thermal environments significantly affect miners' physiological responses and thermal sensations, especially the air temperature changes around 24 o C~26 o C, and the heat stress can be relieved if a proper work-rest organization in a hot working face is addressed

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Section: Effects Of Working Thermal Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heat stress evaluation at the working face in hot coal mines using an improved thermos physiological model

Wu¹,

Fu²,

Tong³

et al. 2017

IJHT

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“…Consequently, values between -0.5 < PMV < + 0.5 [5] are considered optimal, while PMV values below -2 and above +2 indicate the presence of an extreme microclimate, considered harmful to employees [12]. Adverse thermal conditions can lead to disturbances in human heat balance, decrease in productivity of work, irritability and even diseases requiring hospitalization [13]. However, the use of PMV and PPD indices is limited to specific conditions of air temperature (below 30°C), mean radiant temperature (up to 40°C) and air velocity (up to 1.0 m/s).…”

Section: Introductionmentioning

confidence: 99%

The PMV and PPD indices in the selected boiler room

Cichowicz

Stelęgowski

2018

E3S Web Conf.

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Thermal microclimate in a boiler room is formed by factors resulting from thermal processes that are taking place in combustion units. These factors are negatively affecting the indoor environment by worsening the air quality, and therefore it is crucial to maintain adequate air parameters in the room. It is a consequence of the fact that in the boiler room the operation of technological equipment results in an exposure of workers to adverse effects caused by thermal factors. Therefore, the evaluation of thermal conditions in the work area of people was made for the selected industrial boiler room using PMV and PPD indices (which allow to determine the thermal sensation of employees, regarding their surrounding thermal environment, based on the methodology of ISO 7730 standard). The analysis was based on own experimental measurements and numerical calculations made in the DesignBuilder program.

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“…Thus, the thermal transmission capability (thermal insulation) and the moisture transmission characteristic (evaporative resistance) of the mining uniform are significantly important to keep the thermal balance for coal mine workers. At present, in the study on the evaluation of heat stress in hot coal mines, the thermal insulation (TI) and the evaporative resistance (ER) of the mining uniform are generally empirically given according to other similar clothes [5][6][7][8][9], and the TI and ER of the entire working ensemble (including coats, trousers and leather boots) are still not accurately and objectively acquired. Therefore, the determination and analysis of TI and ER of the working ensemble for hot coal mines in China are necessary and of great importance for the thermal safety and thermal comfort assessment.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of heat and moisture transmission characteristics of the working ensemble of hot coal mines using the thermal manikin

Tong¹,

Guo²,

Kang³

et al. 2017

IJHT

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In this paper, the thermal transmission capability (thermal insulation) and the moisture transmission characteristic (evaporative resistance) of the working ensemble for Chinese hot coal miners (from Jining Anju coal mine, a typical hot coal mine in China) were measured and analyzed using a thermal sweating manikin ("Newton") in a climatic chamber. It is found that the thermal insulation of the old (used) mining ensemble worn for one year changes slightly from the new one, but the evaporative resistance decreases about 15%; there are notable differences of local thermal insulation and local evaporative resistance of the mining ensemble among different body zones; the thermal insulation and the evaporative resistance of the mining ensemble change slightly under different thermal conditions, but vary significantly under different humid conditions. The measured data of thermal insulation and the evaporative resistance can provide technical and data support for mining ensemble design, and also are valuable data for evaluating thermal strain of workers in hot coal mines.

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Effect of Heat on Underground Mine Workers

Cited by 37 publications

References 2 publications

Heat stress evaluation at the working face in hot coal mines using an improved thermos physiological model

Heat stress evaluation at the working face in hot coal mines using an improved thermos physiological model

The PMV and PPD indices in the selected boiler room

Experimental evaluation of heat and moisture transmission characteristics of the working ensemble of hot coal mines using the thermal manikin

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