Development of an Efficient Cooling Strategy in the Heading Face of Underground Mines

Xian, Li; Fu, Houli

doi:10.3390/en13051116

Cited by 19 publications

(7 citation statements)

References 30 publications

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“…As the dimensionless radius R = 0 at the wall surface of the surrounding rock yields no solution to Equation (11), the applicable range of the coupling formula is R > 0. In scenarios where excavation and ventilation are not conducted, the rock maintains its original thermal balance, and the temperature of the rock everywhere is the VRT.…”

Section: Time-space Coupling Methods Of Temperature Field Based On Ga...mentioning

confidence: 99%

“…The findings reveal that atmospheric precipitation and water-rock interaction are the region's primary sources of geothermal water. Addressing the second question involves elucidating the cooling load in the high-temperature areas of the mine and establishing the foundation for devising a cooling scheme [10,11]. Hence, it is crucial to investigate the temporal and spatial evolution characteristics of the surrounding rock temperature field in high geothermal roadways influenced by various factors.…”

Section: Introductionmentioning

confidence: 99%

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Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

Zhou,

Zhang,

Shi

et al. 2024

Applied Sciences

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Understanding the time–space coupling characteristics of the surrounding rock temperature field in high geothermal roadways is essential for controlling heat damage in mines. However, current research primarily focuses on individually analyzing the temperature changes in the surrounding rock of roadways, either over time or space. Therefore, the Gauss–Newton iteration method is employed to model the coupling relationship between temperature, time, and space. The results demonstrate that the dual coupling function describing the temperature field of the surrounding rock in both time and space provides a more comprehensive characterization of the temperature variations. Over time, as ventilation duration increases, the fitting degree of the characteristic curve steadily rises, and the characteristic curve descends overall. In the spatial dimension, the fitting degree of the characteristic curve gradually decreases with the rise of the dimensionless radius, and the characteristic curve ascends overall. Additionally, as thermal conductivity increases, the fitting degree of the characteristic curve steadily rises.

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Section: Time-space Coupling Methods Of Temperature Field Based On Ga...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

Zhou,

Zhang,

Shi

et al. 2024

Applied Sciences

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“…For this new cooling strategy, the tracking cooler was designed to lay out in the mine face. However, this layout mode was restricted by many conditions such as space, dust, mechanical damage and pipeline laying (Li and Fu 2020). Dust could reduce the cooling effect of the air cooler.…”

Section: Limitation Of the Current Study And Outline Of Future Researchmentioning

confidence: 99%

Building a non-homogeneous environment for high effective cooling in the face of deep mines

2020

Preprint

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Heat exhaustion of mining environments can cause a great threat to human health. The existing cooling strategies for the mine face aim to cool the whole face. However, the area of effective air-cooling space for the face is small, and a great amount of energy for cooling is ineffective. Effective air-cooling space is a space occupied by the workers in the face. This study proposed to build a non-homogeneous environment for high effective cooling in the face. An inlet air cooler was laid out in the intake airway to cool the whole face to some extent, and the tracking air cooler was designed to track the worker who constantly moved to improve the thermal environment. The cooling load and air distribution for this cooling strategy were investigated. In addition, the airflow in the face was numerically solved to estimate the cooling effect. The results revealed that an average energy saving of approximately 35% could be achieved. The thermal environment of the effective air-cooling space within at least 10 m was significantly improved. This cooling strategy should be taken into account in mine cooling.

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“…Since artificial refrigeration systems usually require the establishment of large refrigeration base stations, their construction and operating costs are relatively high. Many scholars have focused on reducing operation costs, implementing energy-saving technologies, and optimizing refrigeration systems [20][21][22][23]. In general, the artificial refrigeration method has a remarkable refrigeration effect, but is expensive, which limits its wide application in mines.…”

Section: Introductionmentioning

confidence: 99%

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

Huang

et al. 2022

Energies

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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.

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Development of an Efficient Cooling Strategy in the Heading Face of Underground Mines

Cited by 19 publications

References 30 publications

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

Building a non-homogeneous environment for high effective cooling in the face of deep mines

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

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