Numerical study of gas-solid two-phase flow around road-header drivers in a fully mechanized excavation face

Hu, Shengyong; Liao, Qi; Feng, Guorui; Huang, Yu Ping; He, Suqin; Fan, Yurong; Ye, Yabo

doi:10.1016/j.powtec.2018.12.076

Cited by 78 publications

(5 citation statements)

References 31 publications

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“…In addition, the exhaust gas should not react with other substances in the air, and only the gravity and fluid drag force of PM should be considered (Denner et al, 2020;Hu et al, 2018a;Ibarra et al, 2021;Meng, 2016;Stone et al, 2019). Because the ventilation airflow rate in the north-south excavation roadway of the return airway was 405 m 3 /min, the airflow velocity was 0.34 m/s.…”

Section: Numerical Simulation Analysis At Certain Vehicle Velocitymentioning

confidence: 99%

Study on PM diffusion and distribution of trackless rubber-tyred vehicle under different driving conditions in underground coal mining environment

Nie

Liu

Hua

et al. 2023

Preprint

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Particulate matter (PM) is one of the most harmful exhaust pollutants to human health. In this study, the PM diffusion and distribution emitted by trackless rubber-tyred vehicle under different driving conditions in coal mine was analyzed with numerical simulations and field measurements. The results show that when the vehicle velocity was constant, the proportion of PM with a concentration below 6 mg/m3 was the highest owing to the influences of diffusion and airflow dilution. However, when the diffusion distance is less than 3 m, the PM concentration far exceeds the occupational exposure limit (C = 10 mg/m3) specified in the coal mine safety regulations.With increasing vehicle velocity, the PM concentration gradient at a diffusion distance of 0–6 m showed the most significant slope. Besides, the concentration fluctuation of PM was the largest and relatively high when the diffusion distance was 5–15m. Therefore, the area 15 m from the exhaust gas pipe opening of the trackless rubber-tyred vehicle should be controlled.

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Section: Numerical Simulation Analysis At Certain Vehicle Velocitymentioning

confidence: 99%

Study on PM diffusion and distribution of trackless rubber-tyred vehicle under different driving conditions in underground coal mining environment

Nie

Liu

Hua

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Consequently, its diffusion behavior is difficult to study through field experiments. With improvements in computer performance and numerical simulation methods, an increasing number of researchers have used numerical simulation technology to study the diffusion behavior of fugitive dust [8,[32][33][34][35]. Zhao [36] proposed a multi-layer coupling model system to simulate the impact of construction dust emissions on air quality for a period of four months in Beijing.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Spatial Diffusion Behavior of Non-Point Source Fugitive Dust under Different Enclosure Heights

Guo

Lin

Li³

et al. 2023

IJERPH

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Non-point source fugitive dust produced during municipal road construction is one of the main ambient air pollutants gravely threatening the life and health of construction workers and residents around construction areas. In this study, a gas-solid two-phase flow model is used to simulate the diffusion behavior of non-point source dust with different enclosure heights under wind loads. Moreover, the inhibitory effect of the enclosure on the diffusion of non-point source dust from construction to residential areas is analyzed. The results show that the physical blocking and reflux effects of the enclosure can effectively restrain dust diffusion. When the enclosure height is 3–3.5 m, the concentration of particulate matter in most sections of residential areas can be reduced to less than 40 μg/m3. Moreover, when the wind speed is 1–5 m/s and the enclosure height is 2–3.5 m, the diffusion height of non-point source dust particles above the enclosure is concentrated in the range 1.5–2 m. This study provides a scientific basis for setting the heights of enclosures and atomization sprinklers at construction sites. Further, effective measures are proposed to reduce the impact of non-point source dust on the air environment of residential areas and health of residents.

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“…Moreover, Jiang et al designed an experimental model roadway according to the motion equation of gas-solid two-phase flow to study the distribution of coal dust during mining. Liao et al adopted a CFD-DPM method to study the dust distribution around the driver (Hu et al, 2019). Hu et al performed a similar investigation under various velocities (Hu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Study on Optimization of the Dedusting Air Duct Layout in Coal Mine Roadway

et al. 2022

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Coal dust pollution in fully mechanized excavation faces not only affects the safety production of the coal mine but also threatens the health of workers. In order to reduce coal dust pollution and improve work conditions in mines, the layout of the dedusting-air duct in the dry dust collector and the influence of the duct position on the dust-producing area were studied. In addition, the effects of different cutting positions on dust removal efficiency were also studied. A full-scale model of mine roadway is established by CFD, and the influence of the position of the dedusting-air duct on dust diffusion and the distance between the tunneling head and the dedusting air duct on dust removal efficiency are studied. The results show that the higher the cutting position, the higher the dust concentration, and the longer the dust diffusion time in the coal roadway. When the distance between the dedusting-air duct and the tunneling head is set to 4 or 5 m, the dust removal efficiency is the highest. Moreover, the dust removal efficiency of the dry dust collector with the dedusting air duct arranged on the opposite side of the roadway is higher than that of the collector with the duct in the middle of the roadway.

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Numerical study of gas-solid two-phase flow around road-header drivers in a fully mechanized excavation face

Cited by 78 publications

References 31 publications

Study on PM diffusion and distribution of trackless rubber-tyred vehicle under different driving conditions in underground coal mining environment

Study on PM diffusion and distribution of trackless rubber-tyred vehicle under different driving conditions in underground coal mining environment

Numerical Simulation Study on Spatial Diffusion Behavior of Non-Point Source Fugitive Dust under Different Enclosure Heights

Study on Optimization of the Dedusting Air Duct Layout in Coal Mine Roadway

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