Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment
To address the challenge of heat hazards in deep high-temperature mines, this study proposes an advanced geothermal exploitation cooling system (AGECS) based on the concept of synergetic mining of mine geothermal energy. Unlike conventional passive cooling measures applied after mining begins, the p...
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| Language: | English |
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Elsevier
2025-10-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25011281 |
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| author | Kaiqi Zhong Zijun Li Yu Xu Jiao Yue David Cliff |
| author_facet | Kaiqi Zhong Zijun Li Yu Xu Jiao Yue David Cliff |
| author_sort | Kaiqi Zhong |
| collection | DOAJ |
| description | To address the challenge of heat hazards in deep high-temperature mines, this study proposes an advanced geothermal exploitation cooling system (AGECS) based on the concept of synergetic mining of mine geothermal energy. Unlike conventional passive cooling measures applied after mining begins, the proposed system is deployed during the mining preparation stage, allowing the surrounding rock temperature to be reduced in advance. This approach improves the thermal environment from the outset and enables integrated heat hazard control and geothermal energy recovery throughout the mining process. A physical experimental platform with a geometric similarity ratio of 1:100 was constructed to investigate the effects of three key injection parameters (injection temperature, injection duration, and injection flow rate) on the cooling behaviour of the surrounding rock. Results showed that reducing the injection temperature from 25 °C to 10 °C shifted the innermost isotherm value from 31.10 °C to 24.13 °C. Extending the injection duration from 1 h to 2.5 h reduced the innermost isotherm value from 33.43 °C to 24.13 °C and expanded the cooling area. Under a fixed total injected volume, higher injection flow rates improved early-stage cooling but led to faster thermal rebound. Partial least squares regression analysis confirmed that injection temperature consistently dominated the cooling area ratio, while the influence of duration and flow rate varied over time. These findings reveal the effects of injection parameters on cooling performance and provide a theoretical basis for the parameter configuration of the AGECS system in deep mine thermal management. |
| format | Article |
| id | doaj-art-7f629cc15eab47ab898dde4cbce49e00 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-7f629cc15eab47ab898dde4cbce49e002025-08-20T03:41:40ZengElsevierCase Studies in Thermal Engineering2214-157X2025-10-017410686810.1016/j.csite.2025.106868Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experimentKaiqi Zhong0Zijun Li1Yu Xu2Jiao Yue3David Cliff4School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Minerals Industry Safety and Health Centre, The University of Queensland, St. Lucia, QLD, 4072, AustraliaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Department of Architecture and Civil Engineering, City University of Hong Kong, 999077, Hong Kong, China; Corresponding author. School of Resources and Safety Engineering, Central South University, Changsha Hunan, 410083, China.School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaMinerals Industry Safety and Health Centre, The University of Queensland, St. Lucia, QLD, 4072, AustraliaTo address the challenge of heat hazards in deep high-temperature mines, this study proposes an advanced geothermal exploitation cooling system (AGECS) based on the concept of synergetic mining of mine geothermal energy. Unlike conventional passive cooling measures applied after mining begins, the proposed system is deployed during the mining preparation stage, allowing the surrounding rock temperature to be reduced in advance. This approach improves the thermal environment from the outset and enables integrated heat hazard control and geothermal energy recovery throughout the mining process. A physical experimental platform with a geometric similarity ratio of 1:100 was constructed to investigate the effects of three key injection parameters (injection temperature, injection duration, and injection flow rate) on the cooling behaviour of the surrounding rock. Results showed that reducing the injection temperature from 25 °C to 10 °C shifted the innermost isotherm value from 31.10 °C to 24.13 °C. Extending the injection duration from 1 h to 2.5 h reduced the innermost isotherm value from 33.43 °C to 24.13 °C and expanded the cooling area. Under a fixed total injected volume, higher injection flow rates improved early-stage cooling but led to faster thermal rebound. Partial least squares regression analysis confirmed that injection temperature consistently dominated the cooling area ratio, while the influence of duration and flow rate varied over time. These findings reveal the effects of injection parameters on cooling performance and provide a theoretical basis for the parameter configuration of the AGECS system in deep mine thermal management.http://www.sciencedirect.com/science/article/pii/S2214157X25011281Heat hazardAdvanced coolingThermal environmentInjection parameterPartial least squares regression |
| spellingShingle | Kaiqi Zhong Zijun Li Yu Xu Jiao Yue David Cliff Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment Case Studies in Thermal Engineering Heat hazard Advanced cooling Thermal environment Injection parameter Partial least squares regression |
| title | Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| title_full | Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| title_fullStr | Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| title_full_unstemmed | Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| title_short | Cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| title_sort | cooling and heat recovery performance evaluation of an advanced geothermal exploitation cooling system for deep mines based on physical experiment |
| topic | Heat hazard Advanced cooling Thermal environment Injection parameter Partial least squares regression |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25011281 |
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