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A. Tsikrikis, T. Papaliangas, V. Marinos
A. Tsikrikis, T. Papaliangas, V. Marinos


A correlation between the non-dilational friction angle (φm) of rock discontinuities and the constant mi of the Hoek and Brown criterion for intact rock is investigated, using the results of a focus oriented laboratory program. The program consisted of two types of laboratory tests: a series of triaxial compression tests on intact rock samples for the determination of the constant mi and an independent series of direct shear tests on tensile fractures of the same rock types for the determination of the rock joint friction angle φm. Four typical rock types from Northern Greece were used: a granite, a sandstone, a limestone and a marble, covering a range of mi between 8 and 34, and an unconfined compressive strength between 60 and 120 MPa. Apart from the certain range of parameters that is presented for this specific rocks, the experimental results show that the non-dilational friction angle of the rock fracture determined by direct shear testing (φm) decreases logarithmically with the value of the constant mi.


mi constant; direct shear tests; triaxial compressive strength; rock joints; laboratory testing; Hoek and Brown criterion;

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ASTM D7012-14Α, 2014. Standard Test Methods for Compressive Strength and Elastic Moduli of

Intact Rock Core Specimens under Varying States of Stress and Temperatures, ASTM

International, West Conshohocken, PA.

Barton, N., 1971. A Relationship Between Joint Roughness and Joint Shear Strength, Proc. ISRM

Symp.on Rock Fracture, Nancy, France, Pap. I-8.

Barton, N., 1976. The Shear Strength of Rock and Rock Joints, Int. J.Rock Mech. Min. Sci. and

Geomech., 13, 255-279, Pergamon Press.

Hoek, E., 1983. Strength of jointed rock masses, 23rd Rankine Lecture, Géotechnique, 33(3), 187-223.

Hoek, E. and Brown, E.T., 1997. Practical estimates of rock mass strength, International Journal of

Rock Mechanics and Mining Sciences, 34 (8), 1165-1186.

Hoek, E. and Brown, E.T., 1980. Empirical strength criterion for rock masses, J Geotech Eng Div

ASCE, 106(GT9), 1013-1035.

Hoek, E., Carranza-Torres, C. and Corkum, B., 2002. Hoek-Brown criterion - 2002 edition. In:

Proceeding of the NARMS-TAC Conference, Toronto, 1, 267-273.

Hoek, E., Wood, D. and Shah, S., 1992. A modified Hoek-Brown failure criterion for jointed rock

masses, ISRM Symposium on Rock Characterization, Chester, UK.

Hencher, S.R. and Richards, L.R., 1989. Laboratory direct shear testing on rock discontinuities,

Ground Engng, 22, 24-31.

Hencher, S. and Richards, L., 2014. Assessing the shear strength of rock discontinuities at laboratory

and field scales, Rock Mechanics and Rock Engineering, 48, 883-905.

Horn, H.M. and Deere, D.U., 1962. Frictional characteristics of minerals, Géotechnique, 12, 319-35.

ISRM, 2014. Suggested Method for Laboratory Determination of the Shear Strength of Rock Joints:

Revised Version, Rock Mechanics and Rock Engineering, 47(1), 291-302.

Papaliangas, T.T., Hencher, S.R. and Lumsden, A.C., 1995. A comprehensive peak shear strength

criterion for rock joints. In: Fuji, T., ed., Proc. 8th Int. Congress ISRM, Tokyo, 1, 359-366,

Rotterdam, Balkema.

Papaliangas, T.T., Lumsden, A.C. and Hencher, S.R., 1996. Prediction of in situ peak shear strength

of rock joints. In: Barla, G., ed., EUROCK’ 96. Prediction and Performance in Rock

Mechanics and Rock Engineering, Proc. ISRM Symposium, Torino, 2-5 September.

Rotterdam, Balkema.

Papaliangas, T.T., Lumsden, A.C. and Manolopoulou, S., 1997. Rock slides and assessment of insitu

joint shear strength. In: Marinos, P., et al., eds., Engineering Geology and the

Environment, Proc. Intern. Symp., Athens, 23-27 June 1997, Vol. 1. Rotterdam, Balkema.


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