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Study on the Oxygen Enrichment Effect of Individual Oxygen-Supply Device in a Tunnel of Plateau Mine

Author

Listed:
  • Zijun Li

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Rongrong Li

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Yu Xu

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Yuanyuan Xu

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

Abstract

Complex characteristics of the plateau environment such as low oxygen content seriously restrict the exploitation of abundant mineral resources in plateau areas. To regulate the hypoxia environment and improve the comfort of workers engaged in intense physical labor like tunnel excavation operations in plateau mines, an individual oxygen-supply device for tunnel of plateau mine was proposed to create local oxygen enrichment in the area around the human nose. The Computational Fluid Dynamics (CFD) method was used to judge the application’s effect of the individual oxygen-supply device in plateau mine, revealing the oxygen diffusion law under the influence of different oxygen enrichment factors. The orthogonal design and range analysis were used to measure the degree of influence of major factors such as oxygen-supply velocity, oxygen-supply concentration, and tunnel airflow velocity. The results demonstrate that the oxygen mass fraction of the air inhaled by the human had a positive correlation exponential function, a positive correlation linear function, and a negative correlation exponential function, respectively, concerning oxygen-supply velocity, oxygen-supply concentration, and tunnel airflow velocity. The range analysis revealed that the major influencing factors of oxygen enrichment in the tunnel of the plateau mine were, in a descending sequence, as follows: oxygen-supply concentration, tunnel airflow velocity, and oxygen-supply velocity, and the corresponding ranges were 2.86, 2.63, and 1.83, respectively. The individual oxygen-supply device achieved the best oxygen enrichment effect when the oxygen-supply velocity was 5 m/s, the oxygen-supply concentration was 60%, and the tunnel airflow velocity was 0.2 m/s, which increased the oxygen mass fraction of air inhaled by the human to 30.42%. This study has a positive guiding significance for the improvement of the respiration environment in the tunnel of plateau mine.

Suggested Citation

  • Zijun Li & Rongrong Li & Yu Xu & Yuanyuan Xu, 2020. "Study on the Oxygen Enrichment Effect of Individual Oxygen-Supply Device in a Tunnel of Plateau Mine," IJERPH, MDPI, vol. 17(16), pages 1-16, August.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:16:p:5934-:d:399478
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    References listed on IDEAS

    as
    1. Chun Guo & Jianfeng Xu & Mingnian Wang & Tao Yan & Lu Yang & Zhitao Sun, 2015. "Study on Oxygen Supply Standard for Physical Health of Construction Personnel of High-Altitude Tunnels," IJERPH, MDPI, vol. 13(1), pages 1-13, December.
    2. Peng Wu & Feng Yang & Jinlong Zheng & Yanqing Wei, 2019. "Evaluating the Highway Tunnel Construction in Western Sichuan Plateau Considering Vocational Health and Environment," IJERPH, MDPI, vol. 16(23), pages 1-15, November.
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    Cited by:

    1. Zijun Li & Rongrong Li & Yu Xu & Yuanyuan Xu, 2022. "Study on the Optimization and Oxygen-Enrichment Effect of Ventilation Scheme in a Blind Heading of Plateau Mine," IJERPH, MDPI, vol. 19(14), pages 1-17, July.
    2. Zijun Li & Huasen Liu & Yu Xu & Rongrong Li & Mintao Jia & Mengsheng Zhang, 2021. "Numerical Analysis on the Thermal Performance in an Excavating Roadway with Auxiliary Ventilation System," IJERPH, MDPI, vol. 18(3), pages 1-17, January.

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