Experimental Study of Mechanical and Seepage Characteristics of Two Kinds of Coal Samples

Abstract:

Mechanical and seepage characteristics of raw coal samples are the most important research contents of enhancing coal bed methane recovery, but the produce of raw coal sample is very difficult. Based on gas seepage instrument, mechanical and seepage characteristics were performed on normal briquette coal samples and coal samples containing gypsum. The results show that it can increase the cohesion and intensity level by adding gypsum in briquette coal. Porosity and permeability of coal containing gypsum is less than ordinary briquette coal sample. Permeability with axial strain curves of two kinds of coal samples can be fitted with a quadratic function well. In expansion stage, volumetric strain of ordinary coal sample is much smaller than the coal samples containing gypsum. The research has an important guiding significance on enhancing coal bed methane recovery and gateway supporting.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 2098-2101
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.2098
• Online since: December 2014
• Authors: Wen Pu Li*
• Keywords: Enhancing Coal Bed Methane Recovery, Mechanical Characteristics, Permeability, Strain

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