Nazimko V.V. An experience of FLAC3D use during entry stability investigation

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Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 125

Geoteh. meh. 2015, 125, 178-188

AN EXPERIENCE OF FLAC3D USE DURING ENTRY STABILITY INVESTIGATION

¹Nazimko V.V.
¹IPRM NAS of Ukraine

UDC 622.023.23:539.3

Abstract. FLAC3D model has been described as a tool for geomechanic modeling. This model provides comfortable simulation of underground roadway behavior under tough condition. The model accounts initial state, a set of constitutive models and irreversible behavior of the surrounding rocks. The most relevant constitutive models that may be used to simulate irreversible behavior of ground and roadway support are: Mohr-Coulomb model that represents shear failure in rocks; ubiquitous-joint model that accounts an anisotropic plasticity that includes weak planes of specific orientation embedded in a Mohr-Coulomb solid; strain-hardening/softening model that allows representation of nonlinear material softening and hardening behavior based on prescribed variations of the Mohr-Coulomb model properties (cohesion, friction, dilation, tensile strength) as functions of the deviatoric plastic strain; and Hoek-Brown model failure criterion that incorporates a plasticity flow rule that varies as a function of the confining stress level. FLAC3D has embedded FISH programming language that enables the user to define new variables and functions. These functions may be used to extend FLAC3D’s usefulness or add userdefined features.
Keywords: Keywords: underground roadway, ground pressure, irreversible ground movement, computer simulation.

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 About the author:

Nazimko Victor Victorovich, Doctor of Technical Sciences (D. Sc.), Senior Researcher, Principal Researcher in Division of Deposit Extraction, Institute of Physics of Rock Mass under the National Academy of Science of Ukraine (IPRM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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