A numerical simulation of gas flow during coal/gas outbursts
Document Type
Article
Publication Date
3-1-1994
Department
Department of Geological and Mining Engineering and Sciences
Abstract
A model of the gas flow in airways during an instantaneous outburst of coal and gas is formulated and solved numerically using MacCormack's explicit finite-difference scheme. This model is based on the assumption that geological structures, in-situ stresses and high-gas-pressure gradients play important roles in initiating an outburst, with the gas content and gas-pressure gradients being the most dominant factors. The fluid-dynamic processes that occur after an outburst are computed by the numerical integration of the complete time-dependent Navier-Stokes equations. The mixture velocity, the density and the gas-concentration profiles in both time and space domains (immediately after an outburst) are presented. The global results are useful in gaining an improved understanding of gas-flow patterns during coal/gas outbursts and in determining the range of the disturbance so that effective methods of control can be developed.
Publication Title
Geotechnical and Geological Engineering
Recommended Citation
Otuonye, F.,
&
Sheng, J.
(1994).
A numerical simulation of gas flow during coal/gas outbursts.
Geotechnical and Geological Engineering,
12(1), 15-34.
http://doi.org/10.1007/BF00425934
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/4248
