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Delineation and Application of Gas Geological Units for Optimized Large-Scale Gas Drainage in the Baode Mine

Author

Listed:
  • Shuaiyin He

    (CHN Energy Shendong Coal Group Co., Ltd., Shenmu 719300, China)

  • Xinjiang Luo

    (Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, China University of Mining and Technology, Ministry of Education, Xuzhou 221008, China
    School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221000, China)

  • Jinbo Zhang

    (Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, China University of Mining and Technology, Ministry of Education, Xuzhou 221008, China
    School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221000, China)

  • Zenghui Zhang

    (CHN Energy Shendong Coal Group Co., Ltd., Shenmu 719300, China)

  • Peng Li

    (CHN Energy Shendong Coal Group Co., Ltd., Shenmu 719300, China)

  • Huazhou Huang

    (Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, China University of Mining and Technology, Ministry of Education, Xuzhou 221008, China
    School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221000, China)

Abstract

Addressing the challenge of efficient gas control in high-gas coal mines with ultra-long panels, this study focuses on the No. 8 coal seam in the Baode Mine. A multi-parameter integrated methodology was developed to establish a hierarchical classification system of Gas Geological Units (GGUs), aiming to identify regions suitable for large-scale gas extraction. The results indicate that the overall structure of the No. 8 coal seam is a simple monocline. Both gas content (ranging from 2.0 to 7.0 m 3 /t) and gas pressure (ranging from 0.2 to 0.65 MPa) generally increase with burial depth. However, local anomalies in these parameters, caused by geological structures and hydrogeological conditions, significantly limit the effectiveness of large-scale drainage using ultra-long boreholes. Based on key criteria, the seam was classified into three Grade I and ten Grade II GGUs, distinguishing anomalous zones from homogeneous units. Among the Grade II units, eight (II-i to II-viii) were identified as anomalous zones with distinct geological constraints, while two (II-ix and II-x) exhibited homogeneous gas geological parameters. Practical implementation of large-scale gas extraction strategies—including underground ultra-long boreholes and a U-shaped surface well—within the homogeneous Unit II-x demonstrated significantly improved gas drainage performance, characterized by higher methane concentration, greater flow rate, enhanced temporal stability, and more favorable decay characteristics compared to conventional boreholes. These findings confirm the critical role of GGU delineation in guiding efficient regional gas control and ensuring safe production in similar high-gas coal mines.

Suggested Citation

  • Shuaiyin He & Xinjiang Luo & Jinbo Zhang & Zenghui Zhang & Peng Li & Huazhou Huang, 2025. "Delineation and Application of Gas Geological Units for Optimized Large-Scale Gas Drainage in the Baode Mine," Energies, MDPI, vol. 18(19), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:19:p:5237-:d:1763606
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    References listed on IDEAS

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    1. Jinbo Zhang & Huazhou Huang & Wenbing Zhou & Lin Sun & Zaixing Huang, 2025. "Study on Pore Structure of Tectonically Deformed Coals by Carbon Dioxide Adsorption and Nitrogen Adsorption Methods," Energies, MDPI, vol. 18(4), pages 1-16, February.
    2. Wang, Xuefeng & Shi, Yan & Li, Yonggang & Xue, Wenshan & fan, Nan & Chen, Yihan & lv, Rui, 2025. "Experimental and numerical simulation study on the influence mechanism of flue gas displacing coalbed methane under stress conditions," Energy, Elsevier, vol. 333(C).
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