Generation of Methane Absorption due to Relaxation of Molecular Structure of Coal
A. F. BULAT, S. P. MINEEV, A. A. PRUSOVA
Polyakov Institute of Geotechnical Mechanics, National Academy of Sciences of Ukraine, ul. Simferopolskaya 2a, Dnepropetrovsk, 49005 Ukraine
Keywords: угольный пласт, трансформация молекулярной структуры угля, релаксация, сорбированный метан, массоперенос, объем метана, coal bed, transformation of molecular structure of coal, relaxation, methane absorption, mass transfer, methane volume
Abstract
Transformation of the molecular structure of coal under long-term effect of confining pressure due to strain relaxation is estimated numerically. It is found that both under dynamic deformation, as has been determined earlier, and under relaxation of molecular structure of coal, atoms of methyl group and hydrogen remove from aliphatic fringe, join together and form molecules of methane. It is shown that these molecules immediately form sorbing-based connection with coal. Volumes of methane absorption generated in coal due to strain relaxation of the molecular structure of coal are calculated.
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