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Fundamental and applied issues of mining

2021 year, number 1

STRESS STATE OF SUPPORT SECTIONS AT DIFFERENT SIZES OF ROCK FALLS IN THE ROOF AND SIDES OF AN EXCAVATION

A. A. Krasnovsky, V. M. Seryakov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Rock mass, roof and sides of excavation, support, caved rocks, phenolic resins, stresses, strains

Abstract

The formulation of the problem and results of studying the stress state of the support and rock mass around the excavation in rocks with low values of the fracture strength are presented. The features of performing geomechanical calculations in inhomogeneous continuous medium with significantly different mechanical properties and geometric dimensions are discussed. The nature of support deformation when filling the voids formed during the rock destruction in the roof and sides of the excavation with foaming phenolic resins is determined .