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Comparison of spatial and temporal evolution of dust-gas mixtures in confined spaces based on typical ventilation modes and study of the DAGSC system

Author

Listed:
  • Nie, Wen
  • Cai, Yuankun
  • Yang, Junlei
  • Wang, Luyao
  • Liu, Qiang
  • Hua, Yun
  • Guo, Lidian

Abstract

With the increasing mechanization of energy extraction, the dust and gas generated seriously threaten workers' health and tunnel production. In this study, we analyze the spatial and temporal evolution of mixed pollutants in the confined space of tunnels under typical ventilation modes. We compared the advantages and disadvantages of each mode, and based on this we selected the long-pressure, short-extraction ventilation method for the management of gas and dust coupling. However, the management effect was still not sufficient to meet the needs of tunnel safety and cleaner production. Therefore, based on the principle of air curtain closed synergistic control (a synergy between transverse and longitudinal air curtains), we added a cyclone air curtain generator to the long-pressure and short-extraction ventilation mode, and constructed a dust and gas synergistic control (DAGSC) system to optimize the management of mixed pollutants. The system reduces the maximum gas concentration in the tunnel to 0.44 %. At the same time, the dust is controlled within 7.5 m of the working face, ensuring a clean environment for energy extraction and protecting workers’ health. The reliability of the system was verified through on-site measurements.

Suggested Citation

  • Nie, Wen & Cai, Yuankun & Yang, Junlei & Wang, Luyao & Liu, Qiang & Hua, Yun & Guo, Lidian, 2025. "Comparison of spatial and temporal evolution of dust-gas mixtures in confined spaces based on typical ventilation modes and study of the DAGSC system," Energy, Elsevier, vol. 340(C).
    • Handle: RePEc:eee:energy:v:340:y:2025:i:c:s0360544225048765
    DOI: 10.1016/j.energy.2025.139234
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