THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Shangming Liu

,

Li Ma

,

Gaoming Wei

,

Xixi Liu

THE SPATIOTEMPORAL EVOLUTION PATTERNS OF THERMAL ENVIRONMENT IN FULLY MECHANIZED CAVING FACES OF DEEP MINE

ABSTRACT
With the increase in mine depth, the original rock temperature rises under the influence of the geothermal gradient. High temperature surrounding rock heat dissipation leads to an increase in working face temperature, seriously affecting mining production safety. Using distributed fiber optic temperature measurement to study the thermal characteristics of the working face during production, maintenance, and shutdown. The results show that during production, the working face air-flow temperature exhibits a V-shaped trend, decreasing first and then increasing, while during maintenance, it shows an L-shaped trend with an initial decrease followed by stabilization. The air cooler in the intake airway significantly reduces the air-flow temperature during production, with a maximum cooling power of 1260 kW, a cooling range of 9.5°C, and an effective cooling length of 150 m for a single air cooler. During production, in the range of 105 m from the upper end of the working face, the temperature rise rate is faster at 0.04°C per m, while in the range of 105 m to 270 m, the average temperature rise rate is 0.02°C per m. The cooling load for the 2302 N working face during production and maintenance is calculated as 239.79 kW and 159.86 kW, respectively, determining the need for three sets of cooling devices at distances of 65 m, 140 m, and 230 m from the upper end of the working face. This research provides theoretical support for optimizing temperature control strategies and heat hazard management processes on the working face.
KEYWORDS
High temperature mine, fully mechanized caving face, air flow temperature, high temperature heat damage, Convection heat transfer
PAPER SUBMITTED: 2024-04-06
PAPER REVISED: 2024-12-13
PAPER ACCEPTED: 2024-12-20
PUBLISHED ONLINE: 2025-03-08
DOI REFERENCE: https://doi.org/10.2298/TSCI240406028L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 5, PAGES [3529 - 3544]
REFERENCES
  1. Xie, H., et al., Study on the Mechanical Properties and Mechanical Response of Coal Mining at 1000 m or Deeper, Rock Mechanics and Rock Engineering, 52 (2019), July, pp. 1475-1490
  2. Fan, B., et al., Simulation Study on the Disaster-Causing Mechanism of Geothermal Water in Deep High-Temperature Heat-Damaged Mines, Minerals, 12 (2022), 11, 1355
  3. Li, Z., et al., Impact of the Water Evaporation on the Heat and Moisture Transfer in a High-Temperature Underground Roadway, Case Studies in Thermal Engineering, 28 (2021), 101551
  4. Qin, Y. P., et al., Dimensionless Analysis of the Temperature Field of Surrounding Rock in Coalface with a Finite Volume Method, International journal of heat and technology, 33 (2015), 3, pp. 151-157
  5. Li, J., et al., Research on the Mobile Refrigeration System at a High Temperature Working Face of an Underground Mine, Energies, 15 (2022), 11, 4035
  6. Li, X., Fu, H., Development of an efficient Cooling Strategy in the Heading Face of Underground Mines, Energies, 13 (2020), 5, 1116
  7. Yi, X., et al., Effects of Seasonal Air Temperature Variation on Air-Flow and Surrounding Rock Temperature of Mines, International Journal of Coal Science & Technology, 6 (2019), Aug., pp. 388-398
  8. Zhu, S., et al., Physical simulation Experiment of Factors Affecting Temperature Field of Heat Adjustment Circle in Rock Surrounding Mine Roadway, Energy Sources, Recovery, Utilization, and Environmental Effects, 45 (2023), 4, pp. 11278-11295
  9. Tu, Q., et al., Computer Simulation Study on Heat Transfer of Surrounding Rock in Mine Roadway of Coal Mine Enterprises, Thermal Science, 24 (2020), 5B, pp. 3049-3058
  10. Zhou, Z., et al., Study of the Influence of Ventilation Pipe-Line Setting on Cooling Effects in High-Temperature Mines, Energies, 12 (2019), 21, 4074
  11. Guo, P., et al., Numerical Study on Heat Transfer Between Air-Flow and Surrounding Rock with Two Major Ventilation Models in Deep Coal Mine, Arabian Journal of Geosciences, 13 (2020), 756
  12. Yao, W., et al., Influence and Sensitivity Analysis of Thermal Parameters on Temperature Field Distribution of Active Thermal Insulated Roadway in High Temperature Mine, International Journal of Coal Science & Technology, 8 (2021), July, pp. 47-63
  13. Ding, Y., et al., A Dual-Objective Trade-off Approach to Decide the Optimum Design Parameters for Internal Cooling Load Calculation, Energy and Buildings, 269 (2022), 112230
  14. Xu, Y., et al., Synergetic Mining of Geothermal Energy in Deep Mines: An Innovative Method for Heat Hazard Control, Applied Thermal Engineering, 210 (2022), 118398
  15. Nie, X., et al., Heat Treatment and Ventilation Optimization in A Deep Mine, Advances in Civil Engineering, 2018 (2018), 1529490
  16. Tan, X., et al., Study on the Influence of Air-Flow on the Temperature of the Surrounding Rock in a Cold Region Tunnel and Its Application Insulation Layer Design, Applied Thermal Engineering, 67 (2014), 1-2, pp. 320-334
  17. Yang, S., et al., Experiment Study of Machine-Learning-Based Approximate Model Predictive Control for Energy-Efficient Building Control, Applied Energy, 288 (2021), 116648
  18. Gao, X., et al., A Numerical Method for Cooling and Dehumidifying Process of Air-Flowing through a Deeply Buried Underground Tunnel with Unsaturated Condensation Model, Applied Thermal Engineering, 159 (2019), 113891
  19. Qiaoyun, H., et al., Computational Evaluation of Cooling System under Deep Hot and Humid Coal Mine in China: A Thermal Comfort Study, Tunnelling and Underground Space Technology, 90 (2019), Aug., pp. 394-403
  20. Wang, K., et al., Thermodynamic Characteristics of Deep Space: Hot Hazard Control Case Study in 1010 m Deep Mine, Case Studies in Thermal Engineering, 28 (2021), 101656
  21. Zhou, Z., et al., Study of the Influence of Ventilation Pipe-Line Setting on Cooling Effects in High-Temperature Mines, Energies, 12 (2019), 21, 4074
PDF VERSION [DOWNLOAD]
The spatiotemporal evolution patterns of thermal environment in fully mechanized caving faces of deep mine

2025 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence