20.500.12556/DKUM-70661 Non-linear finite-element modelling of room and pillar mine workings including the strain-softening behaviour of the rock mass Modeliranje podpiranja rudarskih izkopov z nelinearnimi končnimi elementi z upoštevanjem deformacijskega mehčanja kamninske mase A 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. Za simulacijo obnašanja kamninske mase in razvoj con popuščanja v območju podpiranja rudarskih izkopov je bil uporabljen dvodimenzionalen model, ki upošteva kriterij po porušitvi. Model upošteva deformacijsko mehčanje kamninske mase in njeno residualno trdnost – trdnost po porušitvi. Analiza stabilnosti konstrukcije upošteva glavne značilnosti popuščanja rudarske konstrukcije zaradi obtežbe in posledičnega spreminjanja togosti kamninske mase ter nadaljnji razvoj napetosti. Izvedene so bile obsežne parametrične analize, v katerih je bil raziskan interakcijski vpliv stropne, podporne in talne konstrukcije na celotno stabilnost rudnika. Rezultati numeričnih analiz jasno kažejo, da modeli z linearnimi končnimi elementi ne prikazujejo realnega obnašanja rudarske konstrukcije. Vseeno pa z njimi dobimo nazorni prikaz omejitev rešitev z linearnimi končnimi elementi pri opisovanju dejanskega obnašanja rudarske konstrukcije, še posebej za relativno mehko kamninsko maso za katero je dokazana uporabnost nelinearnega modela. non-linear FE analysis yielding plastic zones room and pillar mining residual strength stability assessment geomehanika rudniki podporne konstrukcije kamnine zemljine napetosti deformacije modeli analiza z nelinearnimi končnimi elementi popuščanje cone plastičnosti komorno/steberna odkopna metoda rezidualna trdnost true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-05 08:53:51 2018-06-05 08:54:52 2022-08-01 19:38:53 2019-07-11 18:15:23 2008 0 0 str. 4-19 št. 2 Letn. 5 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 624.131 215987712 246178048 1854-0171 URN:SI:UM:DK:NUDYY7SM Acta_geotechnica_Slovenica_2008_Bensehamdi,_Seriani_Non-linear_finite-element_modelling_of_room_and_pillar_mine_workings_including_the_s.pdf Acta_geotechnica_Slovenica_2008_Bensehamdi,_Seriani_Non-linear_finite-element_modelling_of_room_and_pillar_mine_workings_including_the_s.pdf 1 A1ECC469D20E34AD094234408576D1EC 0e5ff588134bea2f132bb0a19ea4ac7c8178d16c8ead46ae34aa691f1df59a06 ff1e53e1-7c0f-11eb-bb7a-00155d0001ca 20.500.12556/dkum/112974e1-b2e0-40e7-afe0-8b2f86e33327 https://dk.um.si/Dokument.php?lang=slv&id=125253 http://fgserver3.fg.um.si/journal-ags/2008-2/article-1.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125254 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0