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 

作者机构：Faculty of TechnologyUniversity of BrasiliaDF 70910-900BrasiliaBrazil 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2023年第11卷第4期

页      面：81-95页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 

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). 

主　　题：Brittle failure Spalling Bulking Voronoi tessellation 

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.