A Simulative Method on Gas Seepage in Coal Seam around Borehole

Abstract:

Based on the analogy between equations of gas seepage in coal seam and that of thermal conduction, a simulative method on gas seepage in coal seam was proposed through that thermal conduction interpreted as gas seepage. The laws of gas emission from borehole in homogeneous and heterogeneous coal seam were analyzed using this method. It indicates that the simulative results of the gas emission from borehole in homogeneous coal seam were satisfied with the corresponding theoretical results during the early stage of gas seepage, while a tolerance between the numerical results and the theoretical ones was appeared in the later period. This is due to the simplification as solving the theoretical equations. The results of heterogeneous coal seam show that curves of gas emission rate conform to the actual situation. The numerical simulation method on the law of gas emission from borehole in coal seam is feasible.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 3176-3181
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.3176
• Online since: August 2013
• Authors: Guo Qiang Cheng, Yi Wang
• Keywords: Borehole, Coal Seams, Gas Seepage, Heterogeneous, Simulative Method

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