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A strength criterion for rocks
Mechanics of Materials, 2021Abstract A simple strength criterion J 2 = α + β σ 3 is investigated to describe the ultimate stress capacity of rocks. This criterion takes the intermediate principal stress σ 2 into consideration. The nonlinear parabolic form on the meridian plane makes the present criterion is more suitable in rock mechanics than the ...
Chunguang Li +3 more
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On the Measurement of the Tensile Strength of Soft Rocks
Rock Mechanics and Rock Engineering, 2005This paper reports on a comparative study of various types of experimental tests for measuring the tensile strength of rocks and rock-like materials. A critical assessment is presented of some widely used laboratory techniques on the basis of experimental data from the literature and from the laboratory investigation performed in this study. Tests were
COVIELLO A, LAGIOIA, Rocco, NOVA R.
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The shear strength of rock and rock joints
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1976Abstract Rock joints exhibit a wide spectrum of shear strength under the low effective normal stress levels operating in most rock engineering problems. This is due to the Strong influence of surface roughness and variable rock strength. Conversely, under the high effective normal stress levels of interest to tectonophysicists the shear strength ...
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Rock strength and deformability
1999The engineering mechanics-based approach to the solution of mining rock mechanics problems used in this book, requires prior definition of the stress-strain behaviour of the rock mass. Important aspects of this behaviour are the constants relating stresses and strains in the elastic range, the stress levels at which yield, fracturing or slip occurs ...
B.H.G. Brady, E.T. Brown
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1964
Abstract Results are given of tensile strength measurements made on rock using the diametrical compression of a disk with a central hole as a technique for determining tensile strength. Detailed quantitative information of the variation of the tensile strength with lamination orientation is given. It is shown that a relationship may exist between the
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Abstract Results are given of tensile strength measurements made on rock using the diametrical compression of a disk with a central hole as a technique for determining tensile strength. Detailed quantitative information of the variation of the tensile strength with lamination orientation is given. It is shown that a relationship may exist between the
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Discontinuities and rock strength
1993Discontinuities usually have negligible tensile strength and a shear strength that is, under most circumstances, significantly smaller than that of the surrounding rock material. It is reasonable to assume, therefore, that discontinuities will have a marked weakening effect on rock masses, and that this weakening will depend, amongst other things, on ...
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1983
We have discussed in the previous chapter, how deformability varies with direction. Laboratory and in situ testing have shown that the strength of anisotropic rocks also varies with spatial orientation. Intuitively, both deformability and strength must be affected by the anisotropic character especially if there is symmetry of any kind.
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We have discussed in the previous chapter, how deformability varies with direction. Laboratory and in situ testing have shown that the strength of anisotropic rocks also varies with spatial orientation. Intuitively, both deformability and strength must be affected by the anisotropic character especially if there is symmetry of any kind.
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Effect of the interblock strength of rocks on the strength of a rock mass
Soviet mining science, 1972V. I. Pushkarev, D. N. Kim
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Effects of fluid—rock interaction on rock salt strength
Géotechnique, 2002Cosenza, P. +2 more
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