胶东地区矿产与地热资源共采可行性浅析

Feasibility analysis of co-mining of mineral and geothermal resources in the Jiaodong Peninsula

  • 摘要: 地热作为一种清洁环保的绿色能源,其有效利用是我国实现双碳目标的重要方向之一。但在矿产资源开采,尤其是地下矿山向深部开发过程中,由于受地温梯度影响,导致矿井温度过高,成为制约矿山生产的重要因素,为维持正常生产,矿山多采取加强通风或人工降温的方式进行处理。如何在矿山开发过程中将地热资源变害为宝,实现资源开发利用的双赢,是值得探讨的难题。胶东是我国最大的黄金生产基地,也是我国东部地热资源最为丰富的地区之一。该区地热和矿产资源具有相似的动力来源和运输通道,使二者在空间分布上具有高度重合性,诸多大型矿山不仅矿产资源储量大,地热资源也相当丰富,是最有望实现地热与矿产资源共采的地区。在分析胶东地区地热和矿产资源分布成因的基础上,梳理了我国低温地热资源利用的现状,认为胶东地区金矿资源埋藏和开采深度较大,建议对三山岛、金青顶、新城、玲珑金矿等利用相对成熟的低温地热供暖技术,治理矿山热害的同时实现矿产与地热资源的共采。

     

    Abstract: Geothermal resources are renewable new energy sources. They have the characteristics of large reserves, wide distribution, good stability, and recyclability and are clean and environmentally friendly. Using geothermal energy represents a new direction for China’s sustainable development through achieving green, clean, low-carbon, and sustainable energy. After more than forty years of development, China’s geothermal industry, including power generation and heating, has made remarkable achievements and played an essential role in helping defend the blue sky and achieve carbon peaking and carbon neutrality goals. Metal mines, especially those with large mining depths, often contain plenty of geothermal resources. These deep mines often have a large amount of high-temperature rock mass or geothermal water. These resources have great mining and utilization values. However, during the mining process of mineral resources, especially in the process of deep development of underground mines, the mine temperature is too high due to factors such as geothermal gradients. The high temperature has become an important factor restricting mine production. To maintain daily production, mines often adopt enhanced ventilation or artificial cooling. How to turn geothermal energy into a usable resource in the process of mine development and achieve a win-win situation in resource development and utilization is a difficult problem worth exploring. The Jiaodong Peninsula is located on the continental margin where the Pacific plate subducts beneath the Eurasian plate. The Jiaodong Peninsula is the largest gold production area in China. Because of the preferable geodynamic setting, the Jiaodong Peninsula is also one of the regions with the most abundant geothermal resources in eastern China. The geothermal and mineral resources in the Jiaodong Peninsula share similar geodynamic settings. Therefore, the spatial distribution of geothermal and mineral resources is highly overlapping. Many large metal mines have large reserves of mineral resources and abundant geothermal resources. However, geothermal resources are often considered detrimental to underground mining activities. This paper analyzed the spatial distribution of geothermal and mineral resources in the Jiaodong Peninsula and summarized the current low-temperature geothermal resource utilization in China. The burial depth and mining of gold resources in the Jiaodong Peninsula are relatively large. Accordingly, it is recommended to use mature low-temperature geothermal heating technology to control the heat damage of mines and realize the co-mining of mineral and geothermal resources at gold mines such as the Sanshandao, Jinqingding, Xincheng, and Linglong gold deposits.

     

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