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Heat Transfer Model and Thermal Insulation Characteristics of Surrounding Rock of Thermal Insulation Roadway in a High-Temperature Mine

Author

Listed:
  • Jianan Gao

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an 710054, China)

  • Shugang Li

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an 710054, China)

  • Fengliang Wu

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an 710054, China)

  • Li Ma

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazards Prevention, Ministry of Education of China, Xi’an 710054, China)

Abstract

The thermal insulation method is one of the effective methods for controlling the thermal environment of a high-temperature mine. In order to explore the thermal insulation mechanism and characteristics of thermal insulation roadways in high-temperature mines, a heat transfer model for the surrounding rock of the thermal insulation roadway was established based on the steady heat transfer theory. The temperature field of the surrounding rock of the thermal insulation roadway was studied, and the effects and sensitivities of thermal insulation layer thickness and thermal conductivity, convective heat transfer coefficient between roadway wall and airflow, and roadway radius on the thermal insulation performance of thermal insulation roadway were discussed. The results suggest the following: (1) The temperature gradient inside the thermal insulation layer is greater than that inside the surrounding rock. The thermal insulation roadway reduces the temperature difference between the original rock and the outside surface of the thermal insulation layer, thereby reducing the heat dissipation of the surrounding rock. (2) As the thermal insulation layer thickness increases, the thermal insulation capacity gradually increases, but its enhancement rate gradually weakens; as the thermal conductivity of the thermal insulation layer or the roadway radius increases, the thermal insulation capacity gradually decreases and its decline rate gradually weakens; and the convective heat transfer coefficient between the roadway wall and airflow has almost no effect on the thermal insulation capacity. (3) The thermal insulation performance of the thermal insulation roadway is highly sensitive or above the thickness and thermal conductivity of the thermal insulation layer, as well as the roadway radius. The sensitivity of thickness and thermal conductivity of the thermal insulation layer is greater than that of roadway radius. Therefore, the research results have guiding significance for the application of thermal insulation methods in the prevention and control of thermal hazards in mines.

Suggested Citation

  • Jianan Gao & Shugang Li & Fengliang Wu & Li Ma, 2023. "Heat Transfer Model and Thermal Insulation Characteristics of Surrounding Rock of Thermal Insulation Roadway in a High-Temperature Mine," Sustainability, MDPI, vol. 15(16), pages 1-23, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12555-:d:1220041
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    References listed on IDEAS

    as
    1. Hao Wang & Qianyu Zhou, 2020. "Finite Element Analysis of Surrounding Rock with a Thermal Insulation Layer in a Deep Mine," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-11, September.
    2. Jielin Li & Xiaoli Yu & Chonghong Huang & Keping Zhou, 2022. "Research on the Mobile Refrigeration System at a High Temperature Working Face of an Underground Mine," Energies, MDPI, vol. 15(11), pages 1-15, May.
    3. Wei Zhang & Tianyi Wang & Dongsheng Zhang & Jiajia Tang & Peng Xu & Xu Duan, 2020. "A Comprehensive Set of Cooling Measures for the Overall Control and Reduction of High Temperature-Induced Thermal Damage in Oversize Deep Mines: A Case Study," Sustainability, MDPI, vol. 12(6), pages 1-18, March.
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