DETERMINATION OF LIGNITE SHEAR STRENGTH ALONG AN IMPOSED PLANE BY SIMULATION AND MODELLING USING FDEM

Florin Dumitru POPESCU, Ciprian-Gheorghe DANCIU, Andrei ANDRAȘ, Ildiko BRÎNAȘ, Sorin Mihai RADU, Mirela Ancuța NEAGA (RADU)

Abstract


FDEM (Finite Discrete Element Method) is a computational numeric method [1-3] that permits dynamic simulation of the interaction of several bodies. Thus, when meeting a fracture criterion, bodies can elastically deform, have translational and rotational movements, interact and fracture. These processes lead to the formation of other discrete bodies which in turn can undergo movements, interactions, deformations and fractures. The Geomechanica IRAZU software package used to perform all simulations within this paper is based on the FDEM concept, thus being a versatile tool for simulations specific to rock mechanics. In the paper a computerised simulation of the shear strength test along an imposed plane was conducted for lignite. In order to achieve this, a series of theoretical aspects regarding shear strength were presented, along with standardized shear testing methods, as well as the steps to be followed to simulate the shear strength test.


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