A computational flow analysis for choosing the diameter and position of an air duct in a working face

Lee, Dong-Kil

doi:10.1134/s1062739147050169

Cited by 13 publications

(3 citation statements)

References 3 publications

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“…Further, Lee [19] presents simulation results obtained based on a parametric study conducted on the working faces of mines. The parameters considered are the duct diameter and duct position.…”

Section: Ventilation At the Working Faces Of Minesmentioning

confidence: 99%

Applications of Computational Fluid Dynamics for Mine Ventilation in Mineral Development

et al. 2022

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In this paper, the application status of computational fluid dynamics (CFD) modeling in mine ventilation is presented by reviewing papers published since the year 2000. The aspects covered in these papers are the numerical analyses of working faces, mine tunnels, ventilation systems, and open-pit mines. CFD modeling procedures for mine ventilation are summarized. Further, building geometries, grid generation, solutions of equations, model validation, grid-independence studies, and solution convergence are discussed. Several examples of CFD modeling for mine ventilation are provided. Finally, conclusions including recommendations for future studies that may allow for more advantageous applications of such numerical simulations are provided.

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Section: Ventilation At the Working Faces Of Minesmentioning

confidence: 99%

Applications of Computational Fluid Dynamics for Mine Ventilation in Mineral Development

et al. 2022

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“…With the increasing of underground mining depth and the development of fully mechanized excavation technology, the dust pollution becomes increasingly serious [1]. It is estimated that the mass concentration of dust during the blasting operation can be up to 2 × 10 −3 kg/m 3 , which is far higher than the safety regulation values [2,3]. In addition, ore drilling, secondary crushing, loading and unloading, and transportation will also generate a lot of dust.…”

Section: Introductionmentioning

confidence: 99%

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

Zhou

et al. 2018

Shock and Vibration

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Suppressing and removing mine dust from the working face is an important task for underground mines worldwide. In this paper, a numerical study was carried out to investigate the influence of ventilation arrangement on the mechanism of dust distribution. The Woxi Pithead of Hunan Chenzhou Mining Co., Ltd, China, was used as a case study, which adopted a widely used far-pressing-near-absorption (FPNA) ventilation system. Based on the theory of gas-solid two-phase flow, the program ANSYS Fluent was utilized, and the three-dimensional airflow migration and dust diffusion numerical models were simulated. The established computational fluid dynamics (CFD) models were validated using the airflow velocity data and the dust concentration data monitored at different positions from the operating coal mine. A comprehensive sensitivity study was conducted to investigate the influence of four parameters on dust suppression, including the distance of pressure air duct outlet from working face (Lp-outlet), the distance of exhaust air duct inlet from working face (Le-inlet), the ratio of pressing air volume to lab sorption air volume (K), and the installation height of the air duct (H). The optimum ventilation layout parameters were obtained through the simulation of the wind field and dust behaviour. The results show that there were four regions during the airflow field, namely, the jet zone, the recirculation zone, the vortex zone, and the mixing zone of pressure and exhaust airflow. All four parameters were found to have an important influence on the mass concentration of dust, and the optimum ventilation layout parameters were determined to be Lp-outlet = 18 m, Le-inlet = 3 m, K = 1.2, and H = 1.6 m.

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“…Onder (2002) and Mirakovski and Krstev (2000) conducted a study on the selection of fan and the fan's location in the auxiliary system of a single drift with a long length. Tuck and Naser (2005) and Lee (2011) analysed the flow characteristics according to dimension and location of a duct, and the conditions of working area in a single drift using computational fluid dynamics (CFD). Auxiliary ducts used in a mine contain many joints, which makes it impossible to prevent air leakage (Vutukuri 1987).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the optimum conditions for a local ventilation system in connection with the mine ventilation network

Lee¹

2017

Proceedings of the First International Conference on Underground Mining Technology

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In a single working face in an underground mine, a single duct and a booster fan are installed to provide fresh air to the working face for local ventilation. Since this local ventilation is provided in conjunction with the entire ventilation network of the mine, its performance and resulting environment depend on the conditions of air intake and exhaust, the duct leakage, and the fan characteristics. To operate an effective ventilation system, the optimal ventilation conditions should be identified along with the characteristics of the mine development. In this study, a computational analysis was conducted considering the ventilation method, conditions of the duct and the fan for a selected test mine scenario to provide an effective and economical local ventilation system. The resulting optimum local ventilation conditions suggested were based on an evaluation of these characteristics.

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A computational flow analysis for choosing the diameter and position of an air duct in a working face

Cited by 13 publications

References 3 publications

Applications of Computational Fluid Dynamics for Mine Ventilation in Mineral Development

Applications of Computational Fluid Dynamics for Mine Ventilation in Mineral Development

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

Evaluation of the optimum conditions for a local ventilation system in connection with the mine ventilation network

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