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Numerical simulation to evaluate gas diffusion of turbulent flow in mine ventilation system

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Tracer gas technique is a method to analyze the airflow path,measure the airflow quantity,and detect any recirculation or leakages in underground mine.In addition,it is also possible to evaluate the axial gas diffusion of gas in turbulent bulk flow by utilizing the tracer gas data.This paper discussed about the measurement using tracer gas technique in Cibaliung Underground Mine,Indonesia and the evaluation of effective axial diffusion coefficient,E,by numerical simulation.In addition,a scheme to treat network flow in mine ventilation system was also proposed.The effective axial diffusion coeffficient for each airway was evaluated based on Taylor's theoretical equation.It is found that the evaluated diffusion coefficient agrees well with Taylor's equation by considering that the wall friction factor,f,is higher than those for smooth pipe flow.It also shows that the value of effective diffusion coefficient can be inherently determined and the value is constant when matching with other measurements.Furthermore,there are possibilities to utilize the tracer gas measurement data to evaluate the airway friction factors.

Tracer gasEffective axial diffusion coefficientMine ventilationNumerical simulation

Arif Widiatmojo、Kyuro Sasaki、Nuhindro Priagung Widodo、Yuichi Sugai、Johannes Sinaga、Haris Yusuf

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Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, Fukuoka-shi 819-0395,Japan

Department of Mining Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40135, Indonesia

PT.Cibaliung Sumberdaya, Pandeglang, Banten 42285, Indonesia

2013

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2013.23(3)
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