虎林盆地隐伏煤炭资源潜力评价与三元耦合控煤模型构建

    Potential evaluation of concealed coal resources in the Hulin Basin and construction of a ternary coupling coal-controlling model

    • 摘要: 中国黑龙江省东部鸡西、七台河等传统矿区浅部资源加速枯竭,虎林盆地永和村古近纪隐伏煤炭资源作为东北能源接续战略核心资源,勘查程度低、控煤机制不明等问题制约其开发利用。本研究以永和村隐伏煤炭资源为研究对象,整合最新地质工作研究成果,通过地质解译构建构造框架,结合沉积相分析、古气候参数及构造沉降速率关系模拟,系统解析控煤机制并构建聚煤模型。研究结果表明,该研究区为大型煤炭资源矿产地,可采煤层埋藏深度适中,煤质适配发电、气化等多场景需求。本研究首次提出“构造-沉积-古气候”三元耦合控煤模型,明确当构造沉降速率为0.1~0.3 mm/a、古气候年均气温为15~20 ℃、浅湖相-湖沼相叠置厚度≥15 m时,聚煤作用最优,该模型大幅提升了同类型隐伏煤炭资源预测的成功率。本研究突破了松散层覆盖区隐伏煤勘查的技术瓶颈,为东北能源接续基地建设提供了资源支撑与技术范式。

       

      Abstract: China’s traditional mining areas in Jixi and Qitaihe in the eastern part of Heilongjiang Province are experiencing accelerated depletion of shallow resources. The concealed coal of the Paleogene in Yonghe Village, Hulin Basin, serves as a core resource for the energy succession strategy in Northeast China. However, issues such as low exploration degree and unclear coal control mechanisms are restricting its development and utilization. This study takes the concealed coal resources in Yonghe Village as the research object, integrates the latest geological work research results, constructs a tectonic framework through geological interpretation, and systematically analyzes the coal-controlling mechanisms and builds a coal accumulation model by combining sedimentary facies analysis, the relationship between paleoclimate parameters and tectonic subsidence rate simulation. The research results show that the study area is a large coal resource mine, with the minable coal seam buried at a moderate depth, and the coal quality is suitable for multiple scenarios such as power generation and gasification. For the first time, this study proposes a ternary coupling coal-controlling model of “tectonics-sedimentation-paleoclimate”, clarifying that the optimal coal accumulation occurs when the tectonic subsidence rate is 0.1-0.3 mm/a, the annual average paleoclimate temperature is 15-20 ℃, and the superimposed thickness of shallow lake facies-lake marsh facies is ≥15 m. This model has significantly improved the success rate of predicting concealed coal resources of the same type. This study has broken through the technical bottleneck of concealed coal exploration in loose layer-covered areas, and provides resource support and technical paradigm for the construction of the Northeast Energy Succession Base.

       

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