Joint surface matching and shear strength. Part A: joint matching coefficient (JMC)

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Abstract

It is common for joints to be equally rough but mismatched due to alternation and dislocation. A new joint matching coefficient (JMC) based on the percentage of joint surfaces in contact is proposed as an independent joint surface geometrical parameter. The JMC is coupled with the existing joint roughness coefficient (JRC) in order to fully describe the geometrical properties and to assess the hydromechanical behaviour of joints. It has also been demonstrated that joint matching is an important factor governing the aperture, normal closure, stiffness, shear strength and hydraulic conductivity of the joints. Therefore, JMC and JRC may be used together to estimate and predict the hydromechanical properties of rock joints.

Original languageEnglish
Pages (from-to)173-178
Number of pages6
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume34
Issue number2
DOIs
Publication statusPublished - 1 Feb 1997

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