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Role of gas energy during coal outbursts
Author(s) -
Valliappan S.,
Wohua Zhang
Publication year - 1999
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/(sici)1097-0207(19990310)44:7<875::aid-nme527>3.0.co;2-g
Subject(s) - coal , methane , coal mining , energy (signal processing) , work (physics) , desorption , environmental science , internal energy , petroleum engineering , matrix (chemical analysis) , thrust , mechanics , geology , mining engineering , materials science , chemistry , physics , waste management , engineering , thermodynamics , composite material , organic chemistry , adsorption , quantum mechanics
This paper presents an analytical method to explain the role of gas energy in the occurrence of coal/gas outbursts. The main thrust of the proposed method is to compare the elastic work to be done for outbursts to occur with the released potential energy which includes the strain energy stored in coal seams and the internal gas energy due to desorption and expansion of methane gas in coal seams. It has been found that the release of gas energy due to desorption of methane from the coal matrix to the pores is the major cause for the occurrence of outbursts. Further, the results of the numerical analysis have been presented to illustrate the influence of various parameters on the energy release during outbursts. Copyright © 1999 John Wiley & Sons, Ltd.