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Verisimilar research on the dust movement in the underground tunneling at the roadheader cutterhead dynamic rotation

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  • Lu, Xin-xiao
  • Wang, Cheng-yan
  • Shen, Cong
  • Wang, Ming-yang
  • Xing, Yun

Abstract

The fast mechanization excavation brings a sharp rise on the dust concentration in the confined tunneling space. In this paper, a full-scale verisimilar tunneling scenario is constructed in Ansys Fluent platform based on the real cutterhead dynamic rotation. The objective is to investigate the behavior characteristics of dust movement exerted by the rotary cutterhead. The result shows that the rotary cutterhead produces a distinctive additional airflow field, which causes a low-velocity zone in the windward and then massive dust sedimentation. There are dust accumulation zones prevalent in the front cutterhead, hydraulic rod, and exhaust air duct. The vortex area extends dramatically in the central hydraulic rod, and the vortex number declines as the distance lengthen. The rotary cutterhead strengthens the additional airflow that promotes the intersection point a clockwise shift. Raising the rotary speed shrinks the dust concentration volume by 54.5% and 82.7% around the cutterhead and rocker. The additional airflow exerts a dominant role in the resultant wind velocity at a low exhaust velocity. The intersection position migrates anticlockwise with the exhaust velocity rise. Increasing the exhaust velocity has a positive effect in suppressing dust in the cutterhead and the driver position.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:238:y:2022:i:pc:s036054422102226x
    DOI: 10.1016/j.energy.2021.121978
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    References listed on IDEAS

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    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).
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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. 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).

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