Tracer Gas Measurement and Simulation of Turbulent Diffusion in Mine Ventilation Airways
Tracer gas measurements have been carried out at two operating underground mines, to evaluate mine ventilation flows and to investigate the effective turbulent diffusion coefficients in mine airways. The effective diffusion coefficients in mine ventilartion-flows have been obtained as 4 to 200m2/s by matching the measured concentration-time curves with the advection-diffusion equation. The turbulent diffusion coefficients in the simple airways have good agreement with the equation proposed by Taylor. However, for complex airways in operating mines, the evaluated effective diffusion coefficients in the mines show higher values than that calculated by the taylors equation. A numerical simulation model using with movements of discrete particles dosed into ventilation flows has been developed to simulate diffusion phenomena of gas or dust in mine airways. Numerical simulations have been conducted on distribution of tracers in single airways with ordinary profiles of mean velocity, velocity fluctuations and Reynolds stress. As one of results, long band of diffused particles was obtained at the single airway of 600 meters in length, and large effective diffusion coefficient was evaluated as 20m2/s.
underground mine ventilation turbulent diffusion coefficient numerical model
Arpa Gabriel Widiatmojo Arif Widodo Nuhindro Priagung Sasaki Kyuro
Department of Earth Resources Engineering, Kyushu University, Motooka 744, Nishiku, Fukuoka, 819-038 Department of Mining Engineering, Institut Teknologi Bandung, Jl, Ganesha 10, Bandung, 40132, Indone
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
265-272
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）