Effect of wind curtain on dust extraction in rock tunnel working face: CFD and field measurement analysis

Hua, Yun; Nie, Wen; Liu, Qiang; Yin, Shuai; Peng, Huitian

doi:10.1016/j.energy.2020.117214

Cited by 77 publications

(16 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e mountain wind field is obtained by CFD numerical calculation [31][32][33], including many laboratories' experimental verification under complex stratum conditions [34,35]. e wind velocity clouds are intercepted at different heights from the mountain surface and the longitudinal section velocity clouds at the mountain peak in the downstream field direction of the calculation area.…”

Section: Numerical Simulation Of the Butte Wind Fieldmentioning

confidence: 99%

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Zhang

Huang

Wang

2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The computational fluid dynamics (CFD) simulation on the butte was carried out to obtain the wind field characteristics for a specific mountain in the hilly area of eastern China. Then, the speed-up ratios of butte at each location distributed by height were calculated. The simulation results were compared with the specified value of mountain wind field acceleration ratio in various codes. The finite element model of the transmission tower line system is established by ANSYS, and the wind-induced vibration response of the structural system under the single mountain wind field is calculated, which is compared with the results of flat ground. The results show that the mountain will hinder the fluid passing through it. There is a deceleration zone in front of the mountain and a flow separation phenomenon behind the mountain. The speed-up ratios at the butte top where accelerating effect are the biggest among all positions of the butte. As the height increases, they approach 1. The speed-up ratios calculated by the Chinese code and the Australian code are linearly changing along the ridge of the butte and are symmetric at the windward side and leeward side. The biggest speed-up ratios are calculated by the Chinese code, and the smallest ratios are calculated by CFD. The wind-induced vibration response of the transmission tower line system is influenced by the wind speed-up ratios and reaches the maximum at the top of the butte. The simulation results at the windward side are close to the values calculated by the Australia code and the Euro code, but at the top and leeward side, they are far smaller than others.

show abstract

Section: Numerical Simulation Of the Butte Wind Fieldmentioning

confidence: 99%

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Zhang

Huang

Wang

2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…The wind speed in the wind tunnel was adjusted with the inverter and measured with a TSI 9545 anemometer. The wind speed was maintained at 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19, and 20 m s −1 , with each wind speed run for 10 min. After that, an electronic scale was used to measure the mass of the residual coal powder in the two surface dishes.…”

Section: Characterization Of Anti-weathering Performancementioning

confidence: 99%

“…[1][2][3] It is estimated that with the absence of any dust control measures, the coal dust concentration at a fully mechanized excavating face can reach 2500-3000 mg m −3 . [4][5][6] In areas where miners simultaneously undertake cutting, transfer, and stage loading operations, the instantaneous total dust concentration in certain coal mines can even reach 4000-6000 mg m −3 . [7][8][9] The aforementioned dust concentrations far exceed the national standard.…”

Section: Introductionmentioning

confidence: 99%

Development and Performance Characterization of a Hybrid Dust Suppressant Based on Sodium Ligninsulfonate Modification

et al. 2020

View full text Add to dashboard Cite

A naturally occurring macromolecular material (sodium ligninsulfonate) is mixed with acrylic acid to perform grafting copolymerization and generate a sodium ligninsulfonate–acrylic acid graft copolymer. The chemical structure of the product is characterized based on infrared spectroscopy. Using viscosity and surface tension as indicators, the optimal ratio of wetting agents and coagulants is selected for auxiliary materials to prepare a novel hybrid dust suppressant customized for coal mines. The results indicate that, compared with spraying with water alone, this dust suppressant enhances the average anti‐weathering performance of coal samples by 28.34%, 30.13%, and 43.40% at wind speeds of 5–10, 11–15, and 16–20 m s−1, respectively. The hybrid dust suppressant can keep the weathering rate of dust to less than 40% at a wind speed of 19.3 m s−1 (i.e., Beaufort scale 8). High‐resolution scanning electron microscopy shows the dust suppressant has a good curing effect. Finally, coal quality analysis experiments show the dust suppressant does not reduce coal quality.

show abstract

“…Different mining processes, e.g., coal mining and transportation, generate varying amounts of dust. Airborne dust poses a serious threat to the health and safety of mine workers (Ahmed et al 2017;Zhou et al 2018a;Wang et al 2019a;Hua et al 2020). In recent years, according to the National Occupational Diseases Statistics Report by the National Health Commission of China, most new pneumoconiosis cases were reported to occur in the coal and non-ferrous metal mining industries.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance analysis of a coking coal dust suppressant spray

Jiang

Wang

Pei

et al. 2021

Int J Coal Sci Technol

View full text Add to dashboard Cite

Coking coal dust is extremely hydrophobic; therefore, combination with droplets in the air is difficult and dust suppression is challenging. Here, a dust suppressant spray for coking coal dust was studied in order to improve of the combination of droplets and coking coal dust. Based on monomer optimization and compounding analysis, two surfactant monomers, fatty alcohol ether sodium sulfate (AES) and sodium dodecyl benzene sulfonate (SDBS) were selected as the surfactant components of the dust suppressant. The surfactant monomers were combined with four inorganic salts and the reverse osmosis moisture absorption of each solution was determined. By combining the reverse osmosis moisture absorption values with the water retention experimental results, CaCl2 was identified as the optimal inorganic salt additive for the dust suppressant. Finally, the optimal concentration of each component was obtained using orthogonal experimental design i.e., AES (0.03%), SDBS (0.05%), and CaCl2 (0.4%). The dust suppressant solution formulated using this method had a high moisture absorption capacity and excellent performance. Graphic Abstract

show abstract

Effect of wind curtain on dust extraction in rock tunnel working face: CFD and field measurement analysis

Cited by 77 publications

References 73 publications

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Development and Performance Characterization of a Hybrid Dust Suppressant Based on Sodium Ligninsulfonate Modification

Preparation and performance analysis of a coking coal dust suppressant spray

Contact Info

Product

Resources

About