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Fundamental and applied issues of mining

2021 year, number 1

STRESS STATE OF ANISOTROPIC ROCK MASS AROUND EXCAVATION OF NON-CIRCULAR CROSS SECTION

P. V. Deev, K. S. Babkov
Tula State University, Tula, Russia
Keywords: Rock mass, anisotropy, excavation, stress state, theory of elasticity

Abstract

A method estimating the stress state of anisotropic rock mass around an excavation of an arbitrary cross section is proposed. The technique is based on a new solution of the plane problem of anisotropic elasticity theory obtained using Lekhnitsky complex potentials. For a number of anisotropic rocks, the dependences of maximum compressive and tensile stresses in rock mass around the arched excavation on the inclination angle of an isotropic plane have been found. Comparison of stress distribution around excavations driven in isotropic and anisotropic rock masses is performed.