The Influence of Ventilation Arrangement on the Mechanism of Dust Distribution in Woxi Pithead

Zhou, Zhiyong; Hu, Pei; Qi, Chongchong; Niu, Tianpei; Li, Ming; Tian, Long

doi:10.1155/2018/8928120

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…The k and ε equations are used for describing the turbulence effect can be described as follows 24,25 :…”

Section: Mathematical Modelmentioning

confidence: 99%

Investigation on dust dispersion during support movement in a fully mechanized mining face and the technology with support frame enclosure dust control

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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A fully mechanized mining face is characterized by serious dust pollution and dust is a major cause of pneumoconiosis that haunts numerous miners. For a fully mechanized face having large mining heights, the main dust source in the pavement area is produced by the moving support frame. To reduce the amount of dust during support's movement, the distribution and dissipation of dust in this process were studied by combining numerical simulations with underground measurements. The results showed that with an increase of the distance from the air inlet, the wind speed of the sidewalk in the fully mechanized face first increased, then decreased, and finally increased again. At the position of the coal cutter, the highest wind speed was 1.78 m/s and the average wind speed of the roadway was about 0.8 m/s. The dust concentration at the dust source was >1000 mg/m3. An area with a high dust concentration and having a length of 15 m was formed on the rooftop, together with a 50 m long dust belt with a dust concentration of 300 to 450 mg/m3 in the pavement area of 10 m from the dust source. Beyond the 45 m radius from the dust source, the dust concentration was stable at about 250 mg/m3. Based on the dust production characteristics of the support frame, an enclosed dust-guiding device was designed and structure-optimized. Based on the on-site field application test results, it was found that the device has a satisfactory dust-guiding effect during support movement and the dust suppression rate near the dust source reached 94.8%.

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“…The k and ε equations are used for describing the turbulence effect can be described as follows 24,25 :…”

Section: Mathematical Modelmentioning

confidence: 99%

Investigation on dust dispersion during support movement in a fully mechanized mining face and the technology with support frame enclosure dust control

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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show abstract

“…Due to the high energy consumption of the entire mine cooling system, it is necessary to properly design the roadway cooling system, which can ensure comfortable mining temperatures and reduce unnecessary energy consumption. To date, several mature mathematical models have been established in the field of mine ventilation, including a one-dimensional heat transfer model, a one-dimensional network flow model, three-dimensional computational fluid dynamics (CFD) models focusing on ventilation airflow [9][10][11] as well as others [12][13][14][15]. Some workers have studied the optimal design of mine ventilation through CFD simulation [16].…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Ventilation Pipeline Setting on Cooling Effects in High-Temperature Mines

et al. 2019

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The high-temperature environment is a major factor that affects deep mining. Cooling has become a major expense, accounting for up to 25% of the total energy consumption of such mines. To address methods of cooling and the cooling cost, this paper studies the influence of the ventilation duct layout on the cooling effect. Six models were created in ICEM-CFD (3D modeling software), and the influence of cold airflow diffusion on the temperature of the mine environment was numerically simulated using ANSYS Fluent. Under the condition of the same ventilation volume, two models utilizing single pipe and double pipe scenarios were established, and six points were selected as the pipeline suspension position, forming six ventilation duct models. The cooling effect of each model was evaluated by analyzing the average temperature of the roadway section, the three-dimensional distribution of the roadway temperature and the velocity streamline of the whole roadway. The results show that the double-tube model has greater advantages than the single-tube model does, due to its superior local temperature, average temperature of the cross-section, range below 303 K, temperature uniformity and local wind speed. Among the models, model 4 (diameter of 0.5 m, 1.9 m away from the bottom of the roadway and 2.4 m away from the center of the circle) is the best pipeline layout scheme for comprehensive temperature values, roadway temperature uniformity and other factors. The average temperature is 299.3 K within 8 m from the mining face, which is 1.66 K lower than that of the single tube model. This configuration will increase the comfort of the mining environment and reduce cooling costs. These results can provide a reference for ventilation duct layouts of roadways in high temperature mines.

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The evaluation analysis on the airborne dust regional pollution of the anchor drilling operation in the tunnel

Zhang

Chen

et al. 2023

Environ Sci Pollut Res

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The Influence of Ventilation Arrangement on the Mechanism of Dust Distribution in Woxi Pithead

Cited by 7 publications

References 15 publications

Investigation on dust dispersion during support movement in a fully mechanized mining face and the technology with support frame enclosure dust control

Investigation on dust dispersion during support movement in a fully mechanized mining face and the technology with support frame enclosure dust control

Study of the Influence of Ventilation Pipeline Setting on Cooling Effects in High-Temperature Mines

The evaluation analysis on the airborne dust regional pollution of the anchor drilling operation in the tunnel

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