Influence of normal and shear stiffness of fractures on deformation characteristics of rock mass

Vlasov, A. N.; Zertsalov, M. G.; Vlasov, D. A.

doi:10.1201/9780429058882-79

Cited by 2 publications

(1 citation statement)

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“…The accuracy of numerical calculations was estimated by comparing the results obtained with the results of the analytical calculation method proposed in [2][3][4]. The method has a strict mathematical justification and allows one to determine the deformation modulus of a structurally heterogeneous medium weakened by a system of plane-parallel cracks according to the formula: ┴ = þý Ā ĀĀ 0 þý Ā +Ā 0 (1) where ┴ = the modulus of deformation of the medium normal to the plane of the cracks, l = the distance between cracks, Ā = the normal stiffness of the crack, 0 = the modulus of elasticity of the structural element of the medium (rock separation).…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling in determining deformation characteristics of fractured rock massifs

Zertsalov

Minin²

2022

E3S Web Conf.

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The article proposes a method for determining the deformation modulus of fractured-block rock masses, weakened by mutually-orthogonal systems of cracks within the linear section (after the closure of cracks) of the deformation curve σ= f (ε). The values of normal - kn and tangential - ks stiffness are used as elastic characteristics of joints. It is shown that in such rocky structures it is impossible to apply the laws of mechanics of a solid elastic body to calculate their deformation characteristics, since the opening of interblock joints is observed when performing numerical experiments. The discrepancy between the results of numerical and analytical calculations is up to 40%. For these purposes, it is proposed to use the regression equation obtained on the basis of regression analysis based on the results of numerical modeling and the method of experiment planning. The presented equation allows, depending on three independent factors: the modulus of elasticity of the rock block - Eo, the rock quality designation index - RQD and the dip angles of systems of mutually orthogonal ioints – α, to determine the modulus of deformation ofthe rock mass.

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Section: Introductionmentioning

confidence: 99%