Geothermal energy accumulation mechanism and development mode in a deep mine: A case study

IF 3.9 2区工程技术 Q3 ENERGY & FUELS

Geothermics Pub Date : 2025-09-23 DOI:10.1016/j.geothermics.2025.103502

Zheng Zhen , Kun Yu , Zhijun Wan , Yiwen Ju , Zhenzi Yu , Zhuting Wang , Bo Zhang , Peng Shi , Zhehan Sun , Jiakun Lv

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引用次数: 0

Abstract

The deep mine holds substantial geothermal energy and presents favorable conditions for exploitation and utilization but lack effective engineering applications. The concept of “geothermal energy accumulation mechanism - location of reservoirs - development planning integrated with the mine system - utilization and economic assessment” was proposed and applied in this study. Geochemical studies of geothermal water have indicated the main type is Na-Ca-HCO₃-SO₄. The temperature of the thermal reservoir is 69.75 °C. Isotope indicators (δ¹⁸O and δ_D) suggest that the main source of geothermal water is meteoric water. Combined with numerical simulation to analyze the geothermal energy accumulation mechanism of No.10 mine. Surface limestone outcrops and faults constitute the water-conducting seepage channel, and geothermal water is concentrated in Likou syncline’s axis to form the thermal reservoir. The water-rich area was identified using underground transient electromagnetic method. A geothermal water development and utilization system was established based on the mine layout, which can meet 83,125 m² of heating. The net income from the geothermal water development and utilization project is $ 412,990 per year. Compared with coal-fired heating, it can reduce CO₂ emissions by 9471 tons/year, thereby contributing to a cleaner transition for the coal mine.

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深部矿井地热能积累机制与开发模式研究

深井地热能储量丰富，具有良好的开发利用条件，但缺乏有效的工程应用。提出并应用了“地热能蓄能机理—储层选址—与矿山系统相结合的开发规划—利用与经济评价”的概念。地热水地球化学研究表明，地热水主要类型为Na-Ca-HCO3-SO4。热储层温度为69.75℃。同位素（δ18O和δD）指标表明地热水的主要来源为大气降水。结合数值模拟分析了十矿地热能积累机理。地表灰岩露头和断层构成导水渗流通道，地热水集中在利口向斜轴线形成热储。利用地下瞬变电磁法对富水区进行了识别。根据矿山布局，建立了地热水开发利用系统，可满足83,125 m2采暖需求。地热水开发利用项目的净收益为每年412,990美元。与燃煤供热相比，每年可减少二氧化碳排放9471吨，有利于煤矿向更清洁的转型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geothermics 工程技术-地球科学综合

CiteScore

7.70

自引率

15.40%

发文量

237

审稿时长

4.5 months

期刊介绍： Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.