An integrated mine geothermal extraction and cooling system based on the holistic space utilization concept of mine

Jiale Zhao, Zijun Li, Yu Xu and Yin Chen

Energy, 2025, vol. 335, issue C

Abstract: Deep mines often encounter heat hazards due to high surrounding rock temperatures, yet this heat can be harnessed as geothermal energy, leading to the concept of Synergetic mining of mine geothermal energy (SMGE). However, previous studies have only focused on geothermal extraction at single-depth levels and have not fully utilized existing mine facilities. Consequently, this paper proposes an integrated Mine Geothermal Extraction and Cooling System (MGECS) that combines heat hazard control with geothermal extraction from a whole-mine perspective. A calculation method for the Thermal-hydraulic-ventilation (THV) coupling effect is presented, overcoming the limitation of previous models by incorporating roadway temperatures. The study includes 2 system layouts, 4 base cases, and 12 working conditions. Results indicate that under normal conditions, the vertical well layout outperforms the horizontal well layout in cooling effect, heat extraction, and cooling stability. However, under high geothermal gradients, the horizontal well layout can surpass the vertical well layout in heat extraction. When designing the injection scheme for the system, it is advisable to use lower injection volumes and temperatures to enhance cooling and sustainable heat extraction. Increasing fracture permeability and thickness can boost geothermal extraction but may reduce the system's cooling efficiency.

Keywords: Geothermal energy extraction; Mine geothermal energy; Mine heat hazard; SMGE; MGECS (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225036321
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:335:y:2025:i:c:s0360544225036321

DOI: 10.1016/j.energy.2025.137990

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().