Mathematical Modeling of Stress-Strain State in Rock Mass during Mining with Backfill
V. M. SERYAKOV
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: rock mass, stresses, strains, mineral deposits, stopes, mining sequence, backfilling, stiffness matrix, initial stress, initial strain, algorithm, ore body, top-down and ascending mining, insufficient backfill, contact conditions
Abstract
The article presents a discussion of formulations and methods of solving of problems on stress-strain state of surrounding rocks and solidifying backfill developed in the Institute of Mining. As shown, effective algorithms can be obtained with the use of a computational domain that conforms with the rock mass before the first and second mining. The process of driving and backfilling is modeled using the iteration procedures from the initial stress and strain methods. Convergence of the offered iteration procedures is confirmed. Solution of practical problems is exemplified. In the framework of the developed methods and algorithms, the author offers the ways of accounting for incomplete backfill with solidifying mixtures and for rheological properties of surrounding rocks and the backfill
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