ANISOTROPIC ROCK MASSIF STATE AROUND THE MINEOPENING HEADED NEAR A DISJUNCTIVE DISTURBANCE RESEARCH
Journal Title: Вестник научного центра по безопасности работ в угольной промышленности - Year 2017, Vol 0, Issue 2
Abstract
Studies of sedimentary rock massif containing an opening and disjunctive disturbance geomechanical state have been carried out. The long opening rout and the strike of the disturbance are parallel. The results are obtained from the anisotropic massif model. It presents an elastic plane permeated by a system of regular attenuation surfaces. In the plane there is a cavity of rectangular shape and a narrow elongated rectangular cut-out in the form of a slit filled with a material with given characteristics of the rigidity for compression and shear.The plane itself is loaded with gravitational forces of the overlying rock strata cavity. The model is realized by means of two methods - the method of fictitious loads and the method of discontinuous displacements. In the method of fictitious loads, the boundary conditions on the opening contour must be respected, and in the discontinuous displacement method, on the contour of the slit. Within the framework of the developed model, a large-scale computational experiment was carried out, during which the stress field was built and on its basis, as well as on the basis of the Mohr - Kuznetsov strength criteria, zones of solid massif discontinuity near the opening and the inclined slit were constructed. It is established that the size and configuration of the zones depend on the orientation angles of regular attenuation surfaces, and with some combination of the zone, discontinuities form the massif instability regions. The obtained results analysis shows the instability region configuration on the coordinate plane, the axes of which are the angles of incidence and the strike of attenuation surfaces.
Authors and Affiliations
N. V. Cherdantsev
Keywords
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