Research on the Mobile Refrigeration System at a High Temperature Working Face of an Underground Mine

Jielin Li, Xiaoli Yu, Chonghong Huang and Keping Zhou
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Jielin Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Xiaoli Yu: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Chonghong Huang: Chinalco Yuxi Mining Co., Ltd., Yuxi 653100, China
Keping Zhou: School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Energies, 2022, vol. 15, issue 11, 1-15

Abstract: With an increase in mining depth, the problem of heat damage in metal mine working face has become increasingly prominent. In order to effectively reduce the temperature of the working face and provide a comfortable working environment for the miners, based on the concept of “cooling on demand”, a mobile refrigeration system for high-temperature working face was designed, and a field test was carried out in Dahongshan Copper Mine, Yunnan Province. At the same time, based on the experimental conditions, the parameter optimization research of the mobile refrigeration system was carried out. The results showed that: (1) The mobile refrigeration system could reduce the wet bulb temperature of the working face at the test site to below 30 °C, which is in line with the “Safety Regulations for Metal and Non-Metallic Mines” (GB16423-2020); (2) when the diameter of the air supply pipe was 600 mm and the air supply velocity was 12 m/s, the target cooling area could meet the continuous operation requirements stipulated in the “Safety Regulations for Metal and Non-metallic Mines” in China; (3) for every 2 °C decrease in supply air temperature, the average wet bulb temperature in the target cooling area decreased by 0.9 °C; (4) for every 10% decrease in supply air humidity, the wet bulb temperature and relative humidity in the target cooling area decreased by 0.76 °C and 4.38% on average, respectively. The research results provide new ideas and methods for the prevention and control of heat damage in metal mines.

Keywords: high temperature mine; mobile refrigeration system; field test; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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