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Effect of wind curtain on dust extraction in rock tunnel working face: CFD and field measurement analysis

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  • Hua, Yun
  • Nie, Wen
  • Liu, Qiang
  • Yin, Shuai
  • Peng, Huitian

Abstract

Dust pollution in fully mechanized working faces of rock tunnels seriously threatens the safe operation and workers’ health. In order to effectively control the dust and improve the working environment in the working face, we simulated the effect of dust suction position, ds and the exhaust air rate, Qs on dust diffusion at the working face by the CFD method. The accuracy and reliability of the numerical simulation were verified by field measurements. It was shown that when ds was 0, 1/4, 1/2, and 3/4, the overall airflow in the tunnel was in a disordered state. The dust, carried by the airflow, was eventually spread to the whole tunnel. When ds was 1, an effective dust control wind curtain with the airflow direction pointing to the working face was achieved under the joint action of exhaust air and pressing air. A uniform flow covering the full section of the tunnel was formed within the range of 4.2–6.5m from the working face. The dust was controlled in an enclosed space between the roadheader and the working face. When Qs was 330–500 m3/min, an effective dust control wind curtain was always formed in front of the roadheader. Consequently, the recommended air exhaust rate under the minimum energy consumption was 330 m3/min.

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  • 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).
    • Handle: RePEc:eee:energy:v:197:y:2020:i:c:s0360544220303212
    DOI: 10.1016/j.energy.2020.117214
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    References listed on IDEAS

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    Cited by:

    1. 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.
    2. 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).
    3. 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.
    4. 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).

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