INFLUENCE OF THE SIZE OF THAWING HALO AROUND AN EXTENDED MINE WORKING ON ITS STABILITY WITH REGARD TO CHANGES IN ELASTIC AND STRENGTH PROPERTIES OF PERMAFROST ROCKS ON TEMPERATURE
V. I. Sleptsov
Mining Institute of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
Keywords: Stress state, stability of mine working, permafrost rocks, heat exchange
Abstract
The results of mathematical modeling of permafrost rock mass deformation around a mine working with circular cross-section are presented and the influence of thawing on stress state of the rock mass and mine working stability in conditions of a hydrostatic stress field is studied. It is shown that there is a critical size of the thawing halo, upon exceeding which the working starts loosing stability .
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