%0 Journal Article
%T Experimental Research on the Mechanical Properties of Methane Hydrate-Ice Mixtures
%A Yanghui Li
%A Yongchen Song
%A Weiguo Liu
%A Feng Yu
%J Energies
%D 2012
%I MDPI AG
%R 10.3390/en5020181
%X The mechanical properties of methane hydrate are important to the stability of borehole and methane extraction from a methane hydrate reservoir. In this study, a series of triaxial compression tests were carried out on laboratory-formed methane hydrate-ice mixtures with various methane hydrate contents. Axial loading was conducted at an axial strain rate of 1.33%/min and a constant temperature of £¿10 ¡ãC. The results indicate that: (1) the deformation behavior is strongly affected by confining pressure and methane hydrate content; (2) the failure strength significantly increases with confining pressure when confining pressure is less than 10 MPa, and decreases with methane hydrate content; (3) the cohesion decreases with methane hydrate content, while the internal friction angle increases with methane hydrate content; (4) the strength of ice specimens are higher than that of methane hydrate-ice mixture specimens; Based on the experimental data, the relationship among failure strength, confining pressure and methane hydrate content was obtained, and a modified Mohr-Coulomb criterion considering the influence of methane hydrate content on shear strength was proposed.
%K methane hydrate
%K mechanical properties
%K safe extraction
%U http://www.mdpi.com/1996-1073/5/2/181