煤炭工程 ›› 2024, Vol. 56 ›› Issue (8): 12-18.doi: 10. 11799/ ce202408003

• 设计技术 • 上一篇    下一篇

矿井深部热能存取一体化系统研究

张瑞瑛,苏 伟,刘 琪,李延朋,杨 亮,冯 绪   

  1. 中煤西安设计有限责任公司,陕西 西安 710054
  • 收稿日期:2023-10-24 修回日期:2024-01-06 出版日期:2023-08-20 发布日期:2025-01-17
  • 通讯作者: 张瑞瑛 E-mail:782343726@qq.com

Research on the storage-extraction integrated system of thermal energy in deep mines

  • Received:2023-10-24 Revised:2024-01-06 Online:2023-08-20 Published:2025-01-17

摘要:

为解决我国煤矿资源深部开采时的热害问题, 提出了一种矿井深部热能存取一体化系统的设想, 剖析了该系统的内涵与技术框架, 介绍了该系统内井下围岩取能系统、地面热交换系统、蓄热系统及智能监控系统协同运行过程。该系统在巷道围岩水平钻孔并布置取热换热器提取围岩地热能,经井下热泵机组进行地热能的转换与输送, 部分热能用于地面供热系统, 富裕热能储存于蓄热系统以达到工作面降温需求。阐述了围岩热能高效提取、地下空间充填蓄热, 集成稳定性控制、污染物防治与安全保障等关键技术, 提出建立地面井下空间维度上的热能“共建—共储—共享” 模式。针对系统运行优化管理, 考虑以热需求与冷需求为双重目标配置优化开采工艺与运行策略的协同度, 提出将工作面风流温度降至26 ℃时所采集的岩层热量为地面供热量及采空区储热量之和。

关键词: 热害治理, 热能提取与储存, 多能互补, 清洁供热

Abstract:

Abstract: Under the dual carbon target, clean heating has become one of the important measures of green mine construction. Based on the heat harm problem caused by the deep mining project of coal resources in China and the consummation of waste heat utilization in the current coal-water-heat co-mining mode, this paper puts forward an integrated system of thermal energy access in deep mine, and analyzes the connotation and technical framework of the system, this paper introduces the cooperative operation process of the system, including the heat extraction system, the ground heat exchange system, the heat storage system and the grouting system. The system drilled a horizontal hole in the surrounding rock of the roadway and arranged heat exchanger to extract the geothermal energy of the surrounding rock, and converted and transported the low-grade geothermal energy mined from the underground through the underground heat pump unit. Part of the thermal energy was used in the ground heating system, and the abundant thermal energy was stored in the thermal storage system to meet the working face cooling demand.The key technologies such as efficient extraction of thermal energy from surrounding rock, heat storage by filling underground space, stability control of integrated system, prevention and control of pollutants and safety guarantee are described, a model of“Co-construction, co-storage and co-sharing” of thermal energy in surface underground space is proposed. The theoretical research system of the deep heat damage treatment and the integration of geothermal exploitation and storage is further clarified. The application of this system in the mine provides a reference for the development and application of deep formation energy storage technology.

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