IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2022i23p8945-d985199.html
   My bibliography  Save this article

Research on the Dust Diffusion and Pollution Behaviour of Dynamic Tunneling in Header Excavators Based on Dynamic Mesh Technology and Field Measurement

Author

Listed:
  • Xi Chen

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Hao Zhang

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Shaocheng Ge

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Cunbao Deng

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Chaonan Fan

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Guoliang Ma

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Weichao Li

    (School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

Abstract

In order to accurately characterize and evaluate dust particle diffusion in the dynamic tunneling process of a boring machine, this study considers the 31,116 main transport chute heaving face of the Lijiahao coal mine as a case study. A dynamic tunneling model is developed considering the real dynamic tunneling state of the header, to carry out an in-depth analysis of the spatial and temporal evolution of wind flow and dust dispersion in the tunnel under dynamic excavation. In addition, the results were compared against the calculations of a static standard excavation model of a conventional header. Employing CFD analysis accompanied by field measurements, it was highlighted that the dynamic tunneling of the header leads to an increase in the pressure difference and the turbulent kinetic energy at the working face. Moreover, an increase in the number of vortices was reported, and a higher concentration of dust spreads more quickly along the return wind side wall to the return flow area. On the other hand, the high concentration of dust under the standard tunneling model was found to accumulate a lot on the return wind side. Simultaneously, as the distance between the pressurized air outlet and the working face increases, the average wind speed in the vortex-type wind flow area at the front of the tunnel decreases. When t = 60 s, the return flow area expands to a space of 8 m~24 m from the head, and the dust accumulated above the header spreads to the back of the header to form a high concentration dust region of more than 500 mg/m³. It was shown that the range of high-concentration dust clouds in the breathing zone decreases compared to the results of the standard tunneling model. Moreover, the dust concentration in the breathing zone of the driver is significantly lower than that reported by the standard tunneling model. Based on the results of the field test, the average error between the simulated and measured data of the dynamic tunneling model was calculated to be around 6.46%, thus demonstrating the model’s capability in describing the real working conditions of the heave tunnel.

Suggested Citation

  • Xi Chen & Hao Zhang & Shaocheng Ge & Cunbao Deng & Chaonan Fan & Guoliang Ma & Weichao Li, 2022. "Research on the Dust Diffusion and Pollution Behaviour of Dynamic Tunneling in Header Excavators Based on Dynamic Mesh Technology and Field Measurement," Energies, MDPI, vol. 15(23), pages 1-28, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8945-:d:985199
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/23/8945/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/15/23/8945/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Hua, Yun & Nie, Wen & Liu, Qiang & Yin, Shuai & Peng, Huitian, 2020. "Effect of wind curtain on dust extraction in rock tunnel working face: CFD and field measurement analysis," Energy, Elsevier, vol. 197(C).
    2. Xiaoqiang Zhang & Yuanyuan Pan, 2022. "Preparation, Properties and Application of Gel Materials for Coal Gangue Control," Energies, MDPI, vol. 15(2), pages 1-15, January.
    3. Lu, Xin-xiao & Wang, Cheng-yan & Shen, Cong & Wang, Ming-yang & Xing, Yun, 2022. "Verisimilar research on the dust movement in the underground tunneling at the roadheader cutterhead dynamic rotation," Energy, Elsevier, vol. 238(PC).
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Yuhao Zhang & Ziyu Zhao & Lin Bi & Liming Wang & Qing Gu, 2022. "Determination of Truck–Shovel Configuration of Open-Pit Mine: A Simulation Method Based on Mathematical Model," Sustainability, MDPI, vol. 14(19), pages 1-22, September.
    2. Huiuk Yi & Minsik Kim & Dongkil Lee & Jongmyung Park, 2022. "Applications of Computational Fluid Dynamics for Mine Ventilation in Mineral Development," Energies, MDPI, vol. 15(22), pages 1-24, November.
    3. Nie, Wen & Jiang, Chenwang & Sun, Ning & Guo, Lidian & Xue, Qianqian & Liu, Qiang & Liu, Chengyi & Cha, Xingpeng & Yi, Shixing, 2023. "Analysis of multi-factor ventilation parameters for reducing energy air pollution in coal mines," Energy, Elsevier, vol. 278(PA).
    4. Zhicheng Fang & Wanjiang Wang & Yanhui Chen & Hui Fan & Ruoqi Dong & Dongbing Pang & Junkang Song, 2023. "Numerical Analysis of Natural Ventilation on One Side of a Room with Two Different Opening Configurations," Sustainability, MDPI, vol. 15(14), pages 1-19, July.
    5. Lu, Xin-xiao & Wang, Cheng-yan & Shen, Cong & Wang, Ming-yang & Xing, Yun, 2022. "Verisimilar research on the dust movement in the underground tunneling at the roadheader cutterhead dynamic rotation," Energy, Elsevier, vol. 238(PC).
    6. Boleslav Taraba & Petr Gřunděl & Gabriela Zelenková, 2023. "The Limiting Content of Combustibles to Prevent Minestone from the Spreading of Fire," Energies, MDPI, vol. 16(13), pages 1-12, June.
    7. Liang, Yuntao & Guo, Baolong & Qi, Guansheng & Song, Shuanglin & Tian, Fuchao & Cui, Xinfeng, 2024. "Method of hydrothermal treatment for coal spontaneous combustion inhibition and its application," Energy, Elsevier, vol. 293(C).
    8. Tian, Zhang & Mu, Xinsheng & Deji, Jing & Shaocheng, Ge & Xiangxi, Meng & Shuli, Zhao & Xiaowei, Zhang, 2023. "Influence of aerodynamic pressure on dust removal by supersonic siphon atomization," Energy, Elsevier, vol. 282(C).
    9. Nie, Wen & Jiang, Chenwang & Liu, Qiang & Guo, Lidian & Hua, Yun & Zhang, Haonan & Jiang, Bingyou & Zhu, Zilian, 2024. "Study of highly efficient control and dust removal system for double-tunnel boring processes in coal mines," Energy, Elsevier, vol. 289(C).
    10. Chao Han & Shibin Nie & Zegong Liu & Jinian Yang & Hong Zhang & Haoran Zhang & Jiayi Li & Zihan Wang, 2022. "A Novel Highly Stable Biomass Gel Foam Based on Double Cross-Linked Structure for Inhibiting Coal Spontaneous Combustion," Energies, MDPI, vol. 15(14), pages 1-12, July.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8945-:d:985199. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.