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Investigations of Ventilation Airflow Characteristics on a Longwall Face—A Computational Approach

Author

Listed:
  • Zhongwei Wang

    (College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Ting Ren

    (School of Civil, Mining and Environmental Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, Australia)

  • Liqiang Ma

    (School of Energy, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China)

  • Jian Zhang

    (College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

Abstract

Mine ventilation has always been critical for underground mining operations to ensure operational efficiency and compliance with safety and health statutory requirements. To obtain a thorough understanding of the ventilation flow characteristics on a longwall face, innovative three dimensional (3D) models, incorporating key features of the longwall equipment and a zone of immediate goaf area, were developed. Mesh independent studies were conducted to determine the desirable mesh required for a mesh-independent solution. Then the model results were validated using field ventilation survey data. At both intersections of maingate/tailgate (MG/TG) and face where the flow boundary changes sharply, the occurrence of undesirable flow separation which causes additional energy loss was identified, as well as its extent of influence. The recirculation of airflow resulting from separation in the TG will lead to accumulation of high concentrations of mine gas, thus regular inspection or continuous monitoring of gas concentration in that area is highly recommended, especially when high gas emission is expected from the working seam. In addition, we also investigated the influence of shearer position and cutting sequence on longwall ventilation. Overall, the longwall models developed in this study together with the flow characteristics obtained will provide fundamental basis for the investigation of longwall gas and dust issues in the future.

Suggested Citation

  • Zhongwei Wang & Ting Ren & Liqiang Ma & Jian Zhang, 2018. "Investigations of Ventilation Airflow Characteristics on a Longwall Face—A Computational Approach," Energies, MDPI, vol. 11(6), pages 1-25, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1564-:d:152570
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    References listed on IDEAS

    as
    1. Yonggang Gou & Xiuzhi Shi & Jian Zhou & Xianyang Qiu & Xin Chen, 2017. "Characterization and Effects of the Shock Losses in a Parallel Fan Station in the Underground Mine," Energies, MDPI, vol. 10(6), pages 1-20, June.
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    Citations

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    Cited by:

    1. Magdalena Tutak & Jarosław Brodny, 2018. "Analysis of the Impact of Auxiliary Ventilation Equipment on the Distribution and Concentration of Methane in the Tailgate," Energies, MDPI, vol. 11(11), pages 1-28, November.
    2. Florencio Fernánez-Alaiz & Ana Maria Castañón & Fernando Gómez-Fernández & Antonio Bernardo-Sánchez & Marc Bascompta, 2020. "Analysis of the Fire Propagation in a Sublevel Coal Mine," Energies, MDPI, vol. 13(14), pages 1-16, July.
    3. Susana Torno & Javier Toraño, 2023. "Methane Emission Outbursts in the Mine Face of Two Galleries: Computational Fluid Dynamics Analysis and On-Site Calibration," Energies, MDPI, vol. 16(21), pages 1-16, October.
    4. Leyla Amiri & Edris Madadian & Navid Bahrani & Seyed Ali Ghoreishi-Madiseh, 2021. "Techno-Economic Analysis of Waste Heat Utilization in Data Centers: Application of Absorption Chiller Systems," Energies, MDPI, vol. 14(9), pages 1-11, April.
    5. Magdalena Tutak & Jarosław Brodny & Dawid Szurgacz & Leszek Sobik & Sergey Zhironkin, 2020. "The Impact of the Ventilation System on the Methane Release Hazard and Spontaneous Combustion of Coal in the Area of Exploitation—A Case Study," Energies, MDPI, vol. 13(18), pages 1-31, September.
    6. Jakub Janus & Jerzy Krawczyk, 2021. "Measurement and Simulation of Flow in a Section of a Mine Gallery," Energies, MDPI, vol. 14(16), pages 1-15, August.

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