Hydro-thermo-mechanical properties of joints in the Carnmenellis granite

J. Zhao, E. T. Brown

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Hydro-thermo-mechanical tests on joints in the Carnmenellis granite from Cornwall, southwest England, were carried out using a geothermal rock test facility. Both natural joints and artificial fractures were tested at effective normal stresses up to 40 MPa, differential pore pressures to 6 MPa and temperatures to 200°C. Experimental effective normal stress-joint closure and effective normal stress-joint permeability data were fitted by a range of deformation and hydraulic models. The joint condition factor is introduced as a factor to account for deviation from the ideal conditions assumed in the smooth parallel plate theory. The experimental results show that the value of JCF depends on a combination of joint surface geometrical characteristics. -from Authors

Original languageEnglish
Pages (from-to)279-290
Number of pages12
JournalQuarterly Journal of Engineering Geology
Issue number4
Publication statusPublished - 1 Jan 1992
Externally publishedYes

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