STRESS STATE OF THE ROCK MASS DURING THE DEVELOPMENT OF STOPING WORKS IN THE ORE BODY TAKING INTO ACCOUNT BACKFILL NONLINEAR DEFORMATION
V. M. Seryakov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Rock mass, mining sequence, stresses, strains, backfill nonlinear properties, stiffness matrix, initial stress procedure
Abstract
The problems of calculating the stress-strain state of an ore body, enclosing and backfilling masses during the development of mining operations at deep horizons are considered. The previously developed algorithm for taking into account the sequence of stoping and backfilling operations to redistribute the stress fields in rocks for modeling the nonlinear properties of backfilling material has been modernized. The calculation is carried out by the method of conic elements using the stiffness matrix formed for an intact rock mass. The nonlinear behavior of backfilling material is taken into account using the initial stress procedure that is also used to model the sequence of sinking and backfilling of stopes.
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