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Synergistic Exploitation of Mineral and Geothermal Resources: Thermal Management and Multiphysical Geomechanics

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Earth Sciences".

Deadline for manuscript submissions: 30 December 2026 | Viewed by 317

Editor

School of Mines, China University of Mining and Technology, Xuzhou 221116, China
Interests: synergistic exploitation of mineral and geothermal resources; rock mechanics; seepage mechanics; thermo-hydro-mechanical effects of rock mass
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As the global energy transition accelerates towards carbon neutrality, the deep underground is increasingly recognized not only as a source of critical minerals but also as a frontier for renewable geothermal energy and large-scale energy storage. The synergistic exploitation of mineral and geothermal resources offers a transformative paradigm: it converts deep mine heat from a conventional hazard into a valuable clean energy asset, while repurposing active workings, fault fracture zones, and abandoned mine shafts for underground thermal energy storage. This Special Issue aims to highlight cutting-edge advances in the co-extraction of deep resources, innovative thermal management systems, and the underlying geomechanics. By integrating mining engineering with geothermal technologies, we seek to provide sustainable, efficient, and safe solutions for the future of geo-energy development.

Key Research Areas:

  • Innovative technologies and methodologies for the co-extraction of mineral and geothermal resources, including heat extraction from fault fracture zones and the mine floor rock strata during mining operations.
  • Underground thermal management and energy storage systems, focusing on cross-seasonal thermal storage in abandoned mine roadways and the utilization of underground mine backfills for heat storage.
  • Advanced and efficient hard rock fragmentation technologies under high-temperature and high-stress conditions, which are essential for deep geothermal reservoir stimulation and mine construction.
  • Experimental and numerical investigations into the coupled Thermo-Hydro-Mechanical (THM) effects in complex fractured rock masses, focusing on heat–mass transfer mechanisms and fluid seepage laws in rock fractures.
  • Long-term stability, safety assessment, and surrounding rock control of underground structures and thermal reservoirs subjected to cyclic thermal loading and coupled multiphysical fields.

Dr. Qiang Li
Guest Editor

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Keywords

  • co-extraction technologies
  • underground thermal management
  • seasonal thermal storage
  • seasonal thermal storage
  • heat and mass transfer
  • THM effects
  • rock fractures seepage
  • cyclic thermal loading

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Published Papers (1 paper)

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Research

31 pages, 6715 KB  
Article
Underground Seasonal Thermal Energy Storage in Post-Mining Roadways for Synergistic Mineral–Geothermal Exploitation
by Bo Cheng, Quanhui Liu, Shengji Xu, Shuai Lu and Qiang Li
Appl. Sci. 2026, 16(12), 6038; https://doi.org/10.3390/app16126038 - 15 Jun 2026
Viewed by 162
Abstract
The synergistic utilization of post-mining spaces and geothermal energy through underground seasonal thermal energy storage (USTES) provides a promising pathway for sustainable heating and the low-carbon redevelopment of mining regions. To advance the thermal management and reveal the thermo-hydraulic evolution patterns within these [...] Read more.
The synergistic utilization of post-mining spaces and geothermal energy through underground seasonal thermal energy storage (USTES) provides a promising pathway for sustainable heating and the low-carbon redevelopment of mining regions. To advance the thermal management and reveal the thermo-hydraulic evolution patterns within these repurposed environments, this study proposes an integrated approach that utilizes post-mining roadways as heat storage reservoirs, within the scope of a single idealized case study. A comprehensive USTES heating system model was established to systematically evaluate operational characteristics and environmental impacts under diverse conditions assuming homogeneous rock properties and idealized thermal boundaries. Results demonstrate that the surrounding ground temperature and the low thermal conductivity of the rock mass contribute to limiting heat dissipation and maintaining stable seasonal storage performance. For a roadway with a 20,000 m3 water storage capacity and an optimal 3900 m2 solar collector area, the system successfully satisfies the thermal demand of 30,000 m2 of building area. The configuration achieves 1239 MWh of cumulative heat storage over a 245-day cycle, maintaining a direct heating-to-heat-pump-upgraded heating ratio of 1.02. Furthermore, the implementation of variable-frequency thermal management strategies demonstrates remarkable economic and environmental superiority, yielding a 35.8% cost reduction compared to coal-fired heating, an overall energy saving rate of 77.5% relative to electric heating systems and a 13.5% decrease in CO2 emissions relative to gas-fired systems. This research provides fundamental design parameters for the synergistic exploitation of mineral and geothermal resources, advancing the development of green heating and the sustainable utilization of post-mining spaces. Full article
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