Study on dust–gas coupling pollution law and selection of optimal purification distance of air duct during tunneling process

Nie, Wen; Guo, Lidian; Yu, Hai; Liu, Qiang; Hua, Yun; Xue, Qianqian; Sun, Ning

doi:10.1007/s11356-022-20995-4

Cited by 8 publications

(1 citation statement)

References 52 publications

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“…The law of dust migration in tunneling and shotcrete operation at the same time was obtained by Chen et al (2022) using numerical simulation. Nie et al (2022) simulated the interaction mechanism of air ow, gas, and dust, and obtained the optimal puri cation distance of the air duct. In this work, considering the gas-solid two-phase ow, a coupled computational uid dynamics (CFD) and discrete phase model (DPM) method was used to simulate the air ow and dust distribution in the breathing zone for underground workers.…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental parameters on workers’ dust inhalation in underground mines

Huang,

Chen,

Tao

et al. 2024

Environ Sci Pollut Res

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Much dust is generated in coal mining underground work processes, posing threats to workers' health and safety production. Dust enters the human body mainly through inhalation, which is primarily determined by the dust concentration around workers. In this study, the air ow eld and dust distribution in the tunnel are simulated by Fluent software. The breathing zone for a worker was de ned to clarify the extent of external dust distribution in uencing dust inhalation. The effects of human respiration, dust production rates, air supply velocities, and workers' positions on dust concentration in the breathing zone were investigated. The results show that there is upward air ow around the worker standing in the center of the air circulation. Human inhalation and exhalation barely in uence the air ow distribution and respirable dust concentrations in the breathing zone. Reducing the dust production rate in the tunnel can reduce the respirable dust concentration in the breathing zone by almost the same proportion. While increasing the air supply velocity by 50% would reduce only 20% dust in the breathing zone. The dust concentrations vary along the roadway, in which the low concentration zone is located in the middle, more than 1.0 m away from the dust-producing surface and the wind surface.

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Section: Introductionmentioning

confidence: 99%