A numerical simulation of dust pollution law under traditional electric rake operation: A case study of Shuiyindong gold mine

Hu, Hongyuan; Zhang, Ziqing; Li, Binglei; Zhan, Shulin; Huang, Yiyi; Lv, Qinyao; Hu, Zhenhua; Long, Yi

doi:10.1016/j.psep.2023.03.070

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…It can be seen that the airflow velocity significantly increases after the forced airflow position. The simulated area average airflow velocity is quite consistent with the on-site measurements . Therefore, the proposed model in the present work was confirmed to be a reliable method for simulating the ventilation flow field in metal mine tunnels.…”

Section: Resultssupporting

confidence: 82%

“…The local airflow velocity inside the tunnel is the key flow field information that affects dust diffusion. Comparisons between simulated airflow velocity and on-site measurements of the Shuiyindong gold mine in China 38 at different locations are illustrated in Figure 4 . The inlet airflow velocities at the windward side of the roadway and at the forced air duct are 1.5 and 17.0 m/s, respectively.…”

Section: Resultsmentioning

confidence: 99%

Section: Computational Fluid Dynamics Model For Airflow and Dust Part...mentioning

confidence: 99%

“…The geometric model and dimensions of the ventilation tunnel, the air properties, and the dust source characteristics in the present work are derived from the Guizhou Shuiyindong gold mine in China. 38 Figure 1 A illustrates the computational domain for the gas–solid flow of air and dust particles, which is a cross-shaped tunnel formed by a ventilation roadway and a working roadway. As shown, the ventilation tunnel is 50 m long, with a cross-sectional width of 2.5 m and a height of 3.0 m. One end of the working roadway is the blasting face, with a length of 12 m and a cross-sectional width and height of 2.6 m. At the other end of the working roadway is a 2.5 m long equipment room.…”

Section: Computational Fluid Dynamics Model For Airflow and Dust Part...mentioning

confidence: 99%

See 3 more Smart Citations

Gas–Solid Flow Characteristics of Airflow and Dust Particles in Blasting Excavation of Underground Metal Mine Tunnels

Pang,

Ren,

Wang

et al. 2024

ACS Omega

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Effective dust removal has long been a challenge in the blasting mining of underground metal mine tunnels, and uncontrolled dust diffusion seriously endangers workers' respiratory systems and the underground space safety environment. However, the vast majority of existing numerical studies on dust diffusion are focused on coal mine fully mechanized mining, which is different from metal mine blasting excavation in terms of stope structure and dust properties. Furthermore, the mechanism by which the forced and exhaust ventilation modes affect the diffusion characteristics of inhalable particles is unclear. In this work, gas−solid flow characteristics for dust diffusion in a typical metal mine blasting tunnel were numerically investigated based on the Euler−Lagrange method, where the blasting face instantly released 6.37 × 10 7 particles with 100 different sizes, ranging from 0.8 to 200 μm. The interphase forces between airflow and dust particles are comprehensively modeled, and the particle diffusion effect caused by fluid turbulence is described by a discrete random walk model. Detailed information for airflow turbulence and particle migration was revealed, and dust removal efficiencies for inhalable particulate matter (PM10) by forced, exhaust, and hybrid ventilation were analyzed. Numerical results predict a complex airflow pattern in the working roadway, including the jet-flow region, return airflow core region, airflow disorder region, and secondary flow region. Dust diffusion temporal characteristics can be divided into three stages, namely, the initial stage of dust generation, the efficient ventilation and dust removal stage, and the later stage of dust diffusion. Dust diffusion spatial characteristics indicate that under the Coanda wall attachment effect, the dust concentration exhibits nonuniform distribution in both vertical and horizontal directions of the return air roadway. The dust removal efficiency of hybrid ventilation on inhalable particles above respiratory height is better than that of forced ventilation, especially in the return air roadway. The additional exhaust air duct based on forced ventilation can discharge more inhalable particles from the tunnel.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Computational Fluid Dynamics Model For Airflow and Dust Part...mentioning

confidence: 99%

Section: Computational Fluid Dynamics Model For Airflow and Dust Part...mentioning

confidence: 99%

See 2 more Smart Citations

Gas–Solid Flow Characteristics of Airflow and Dust Particles in Blasting Excavation of Underground Metal Mine Tunnels

Pang,

Ren,

Wang

et al. 2024

ACS Omega

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Study on multiple influence mechanism of airflow-dust-gas coupling diffusion under large vortex flow technology

Qin,

Yu,

Wang

et al. 2024

Building and Environment

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Numerical study on the gas-solid diffusion characteristics of airflow and dust particles in metal mine blasting excavation under three hybrid ventilation modes

Pang,

Ren,

Yang

et al. 2024

Powder Technology

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A numerical simulation of dust pollution law under traditional electric rake operation: A case study of Shuiyindong gold mine

Cited by 4 publications

References 14 publications

Gas–Solid Flow Characteristics of Airflow and Dust Particles in Blasting Excavation of Underground Metal Mine Tunnels

Gas–Solid Flow Characteristics of Airflow and Dust Particles in Blasting Excavation of Underground Metal Mine Tunnels

Study on multiple influence mechanism of airflow-dust-gas coupling diffusion under large vortex flow technology

Numerical study on the gas-solid diffusion characteristics of airflow and dust particles in metal mine blasting excavation under three hybrid ventilation modes

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