Experimental Investigation on Mechanical Behavior of Methane Hydrate Bearing Coal under Triaxial Compression

X Gao, C Gao, B Zhang, Q Wu, W Liu, L Wang
The mechanical behavior of hydrate-bearing coal has relevance for the coal and gas outburst prevention. This study reports on the results of triaxial compression tests on methane hydrate bearing coal. The results show that the stress-strain relationships depend closely on the confining pressure. The failure strength linearly varies with the saturation. The higher the hydrate saturation is, the larger the internal friction angle is. The cementation between the coal and hydrate increases
more » ... increases apparently when the saturation is high enough. The mechanical behavior of coal is improved after hydrate formation in the aspects of failure strength and the deformation elastic modulus.