Pseudo-discontinuum model to simulate hard-rock mine pillars  

作　　者：Erick Ro genes Alessandra dos Santos Gomes Marcio Muniz de Farias Leandro Lima Rasmussen 

机构地区：[1]Faculty of Technology,University of Brasilia,DF 70910-900,Brasilia,Brazil

出　　处：《Underground Space》2023年第4期81-95,共15页地下空间（英文）

基　　金：based upon a R&D Project from ANEEL-National Agency(Grant No.PD-0394–1709/2017)supported by Eletrobras Furnas and University of Brasilia;supported by Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq and the Brazilian National Department of Transport Infrastructure(Grant No.TED 352/2020).

摘　　要：In this study,the pseudo-discontinuum modeling technique,called continuum Voronoi block model(CVBM),was applied to repre-sent the behavior of hard-rock pillars from underground mines subjected to high field stresses.The CVBM’s ability to produce numerical results consistent with the observed behavior of pillars is demonstrated through the numerical analysis of a hypothetical case and a back analysis of the Creighton mine pillar.The results show that the model can capture convergence displacements and explicitly show the formation of macro-fractures parallel to excavation walls,intact rock slabs,and V-shaped notches.These components are characteristics of brittle failure induced by highly stressed ground conditions.The studies presented in this work confirm the CVBM as a convenient tool for the numerical modeling of intact rock pillars excavated in deep underground mines.

关 键 词：Brittle failure SPALLING BULKING Voronoi tessellation 

分 类 号：TD327[矿业工程—矿井建设]