Influence of Particle Size Distribution of Coal on Methane Release in High-Output Longwalls
A. A. Ordin1,2,3, A. M. Timoshenko4, D. V. Botvenko4
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
2VostNII Science and Production Center, Kemerovo, 650002 Russia
3Institute of Computational Technologies, Federal Research Center, Novosibirsk, 630090 Russia
4VostNII Science Center, Kemerovo, 650002 Russia
Keywords: Mine, coal, shearer, particle size distribution, methane release, surface area, dust particles
Abstract
Modern heavy-duty shearers cut coal with high production of dust particles. The screen tests of coal from Zarechnaya Mine are reported. Methane flow rate is theoretically calculated as function of dispersion phase in coal from Zarechnaya Mine at different particle size distribution of coal. It is found that methane flow rate reaches its maximum in fine coal 0-25 mm in size.
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