Conserning the stresses arising near mine working
By experiment, the notion of zone disintegration is detected, i.e. the formation of close circular domain out of broken-up rocks some way from the centre of the mine working in rock massif. Analytical justification to this notion failed to be obtained. The article examines the peculiarities of stress state for isotropic surface, which is weakened by the circular hole and squeezed (stretched) at infinite with constant efforts; the efforts are defined by the depth of the mine working. The field of shearing strains is built; the strains reach extreme values at some way from the centre of the mine working, forming circular line and providing the possibility of shift at particular conditions. These shearing strains, as well as Luders’ lines, precede the braking of material; they are analytically obtained for the first time. Divergence of experimental and analytical result is shown, as well as the possibility of a fresh approach to rock deformation near the mine working. The well-known notion has been explained with the use of elastic solution; numeral calculations have been avoided due to finite-elements method.