Non-linear finite-element modelling of room and pillar mine workings including the strain-softening behaviour of the rock massBensehamdi, Salim (Avtor) Seriani, Abdelbaki (Avtor) , Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Lastnik avtorskih pravic) non-linear FE analysisyieldingplastic zonesroom and pillar miningresidual strengthstability assessmentA two-dimensional model adopting post-failure criteria was used to simulate the behaviour of the rock mass and the development of yield zones around room and pillar mine workings. The model conformed to the strain-softening behaviour of the rock mass and accounted for its post-failure residual strength. The structural-stability-analysis approach accounted for the main features of the mine structures’ yield produced during loading through changes in the rock material’s stiffness and the subsequent evolution of the stresses. A comprehensive parametric analysis was performed and the inevitable effect of the interaction of the roof, pillar and floor on the overall stability limit of the mine was investigated. The numerical results clearly showed that the finite-element linear models could not realistically represent the true behaviour of the mine structure. However, they clearly demonstrated the limitations of the finite-element linear solutions in representing the true behaviour of the mine structure, particularly when the rock-mass structure is relatively weak, and that a non-linear approach was justified.20082018-06-05 08:53:51Znanstveno delo70661ISSN: 1854-0171UDK: 624.131OceCobissID: 215987712COBISS_ID: 246178048ISSN pri članku: 1854-0171NUK URN: URN:SI:UM:DK:NUDYY7SMslFakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru