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Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution

Brugada, J; Cheng, YP; Soga, K; Santamarina, JC; (2010) Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution. Granular Matter , 12 (5) 517 - 525. 10.1007/s10035-010-0210-y.

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Abstract

Methane hydrate soil is a natural soil deposit that contains methane hydrate in its pores. The micro-scale processes of the geomechanical behaviour of methane hydrate-bearing soils are investigated by the Discrete Element method (DEM). A series of DEM simulations of triaxial compression tests were performed to study the influence of methane hydrate saturation (S h ) on the stress–strain relationship, the volumetric response and on the macroscopic geomechanical properties such as friction and dilation angle. Results of the numerical simulations are compared with laboratory triaxial test data performed on sandy methane hydrate samples. The simulations showed that for the pore-filling case, the hydrate contribution to the strength of the sediment is of a frictional nature, rather than of a cohesive nature.

Type:Article
Title:Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution
DOI:10.1007/s10035-010-0210-y
Additional information:From the issue entitled "Special Issue : “IS-Shanghai 2010: International Symposium on Geomechanics and Geotechnics:From Micro to Macro, Shanghai, China, October 2010”/Guest Edited by Mingjing Jiang and Fang Liu"
Keywords:Discrete element, Methane hydrates, Pore-filling, Triaxial drained tests
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Civil, Environmental and Geomatic Engineering

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