Quasi-Brittle Rock Failure Model
V. M. KORNEV, A. A. ZINOV’EV
M.A. Lavrent’ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Akad. Lavrent’eva 15, Novosibirsk, 630090 Russia
Keywords: quasi-brittle failure, structured materials, coal, inner fracture, necessary and sufficient criteria
Abstract
The article presents and discusses a quasi-brittle rock failure model, analytical expressions constructed for limit stresses using necessary and sufficient criteria of structured rock failure, normal tensile stresses in rock mass with fracture, quasi-brittle failure diagram constructed using approximation of two-section kinked stress–strain curves obtained in coal under tension, and critical stress estimates.
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