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2. Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

Author

Leticia Teixeira Palla Braga, Skoczylas Norbert, Katarzyna Kozieł, and Anna Pajdak

Subjects
outburst, Control and Optimization, Astrophysics::High Energy Astrophysical Phenomena, 020209 energy, Energy Engineering and Power Technology, Mineralogy, Sieve analysis, methane emission, 02 engineering and technology, Fault (geology), lcsh:Technology, Methane, chemistry.chemical_compound, 020401 chemical engineering, unipore model, hard coal, 0202 electrical engineering, electronic engineering, information engineering, Coal, 0204 chemical engineering, Electrical and Electronic Engineering, Engineering (miscellaneous), Physics::Atmospheric and Oceanic Physics, geography, geography.geographical_feature_category, lcsh:T, Renewable Energy, Sustainability and the Environment, business.industry, Coal mining, Sorption, Tectonics, Volume (thermodynamics), chemistry, business, Geology, Energy (miscellaneous)
Abstract

The goal of this paper is to analyze the phenomenon of gas emission during a methane and coal outburst based on the unipore Crank diffusion model for spherical grains and plane sheets. Two occurrences in the Upper Silesian Coal Basin were analyzed: an outburst in a Zofiówka coal mine in 2005 and an outburst in a Budryk coal mine in 2012. Those two outbursts differed considerably. The first one was connected with an unidentified tectonic disturbance in the form of a triple, interlocking fault, and the other one is an example of an outburst in an area free from tectonic disturbances. The model analysis required laboratory tests in order to determine the sorption properties of coals from post-outburst masses. Sorption isotherms and the values of the effective diffusion coefficient were specified. The post-outburst masses were subjected to sieve analysis and the grain composition curves were plotted. The researchers also used the measurement data provided by proper mine services, such as the methane content, the volume of post-outburst masses, and the time courses of CH4 concentration changes in excavations. They were recorded by methane measurement systems in the mines.

Published
2019

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