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Research on the Monitoring of Overlying Aquifer Water Richness in Coal Mining by the Time-Lapse Electrical Method

Author

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  • Chenyang Zhu

    (College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Guowei Zhu

    (State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Yufei Gong

    (College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Lei Zhang

    (College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

To study the influence of coal mining on the water richness overlying strata in the mining area using time-lapse electrical monitoring technology, four dataset acquisitions were completed with the same acquisition method, equipment, parameters, and processing flow. According to the characteristics of the data, major problems such as topographic correction, high-precision denoising, spatial and temporal normalization, and resistivity data inversion have been solved. Precise tomographic imaging was achieved through high-precision data processing and difference inversion. The results show that the electrical stratification characteristics of the overlying soil and rock layers are clear, the resistivity from the surface down gradually increases, and the electrical layers are not uniform locally. During mining, the overlying strata are affected by mining, the electrical resistivity of the underlying aquifers increased to varying degrees, and the fluctuation of electrical resistivity increased while the aquifer’s water content decreased. After mining, the overlying aquifer has the phenomenon of ‘reduced resistivity and water recovery’. After a period of time, the overlying soil disturbance and overlying rock failure zone will gradually tend to be stable. Meanwhile, the aquifer structure and water content will also gradually recover. Our results could provide guidance for water resources protection in this region.

Suggested Citation

  • Chenyang Zhu & Guowei Zhu & Yufei Gong & Lei Zhang, 2024. "Research on the Monitoring of Overlying Aquifer Water Richness in Coal Mining by the Time-Lapse Electrical Method," Energies, MDPI, vol. 17(8), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:8:p:1946-:d:1378693
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    References listed on IDEAS

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    1. Jianping Huang & Haipeng Yu & Xiaodan Guan & Guoyin Wang & Ruixia Guo, 2016. "Accelerated dryland expansion under climate change," Nature Climate Change, Nature, vol. 6(2), pages 166-171, February.
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