A coupled fluid FEM-DEM technique for predicting blasting operations in tunnels
作者机构：Centre Internacional de Metodes Numerics en Enginyeria(CIMNE)Spain Universitat Politecnica de Catalunya(UPC)Gran Capitan s/nCampus Nord08034 BarcelonaSpain George Mason UniversityUSA1
出 版 物：《Underground Space》 (地下空间（英文）)
年 卷 期：2018年第3卷第4期
页 面：310-316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] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程]
基 金：the Tunel project funded by the Spanish Ministry of Science and Innovation.(2015-2019)via the subprogram CIEN(IDI-20150705) the EZUANA project(BIA2016-78544-R),funded by the Spanish Ministry of Education and Science of Spain.
主 题：Discrete elements Finite elements Fracture mechanics FEM-DEM Gas dynamics
摘 要：We present recent developments in the coupling of the finite element method(FEM)and the discrete element method(DEM)for the analysis of rock blasting operations in tunnels.The coupled FEM-DEM technique has been proven to be an efficient procedure for pre-dicting the multiple fractures of rock induced by the loads generated in blasting.The coupled FEM-DEM procedure is applied in tunnel construction,as well as to gas pressure blasting pyrotechnics to break rocks for the excavation of the tunnel front.In the latter case,the effect of gas explosion is modeled by solving the equations of gas dynamics in the analysis domain using FEM.The effect of gas forces in the underlying rock mass is modeled via an embedded fluid-structure interaction method.The efficiency of the coupled FEM-DEM tech-nique is demonstrated in several examples of fracture tests and rock blasting problems related to tunnel engineering.The examples pre-sented indicate that the combination of the DEM with simple three-node linear triangular elements(for two-dimensional problems)captures the onset of fractures and their evolution accurately,accounting for the penetration of gas in the failure domain(Zarate&Onate,2015;Zarate,Cornejo,&Onate,2018).
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