SPH-FEM simulations of microwave-treated basalt strength  

微波处理玄武岩强度的SPH-FEM耦合算法模拟

作　　者：Chun YANG Ferri HASSANI Ke-ping ZHOU Feng GAO Ameen TOPA 杨春;Ferri HASSANI;周科平;高峰;Ameen TOPA(中南大学资源与安全工程学院,长沙410083;Department of Mining and Materials Engineering,McGill University,3450 University,Frank Dawson Adams Bldg.,Montreal,QC H3A 0E8,Canada;中南大学高海拔寒区采矿工程技术研究中心,长沙410083;Institute of Transportation Infrastructure,Universiti Teknologi PETRONAS,Seri Iskandar,Perak 32610,Malaysia;Department of Maritime Technology,University Malaysia Terengganu,Kuala Terengganu 21300,Malaysia)

机构地区：[1]School of Resources and Safety Engineering,Central South University,Changsha 410083,China [2]Department of Mining and Materials Engineering,McGill University,3450 University,Frank Dawson Adams Bldg.,Montreal,QC H3A 0E8,Canada [3]Research Center for Mining Engineering and Technology in Cold Regions,Central South University,Changsha 410083,China [4]Institute of Transportation Infrastructure,Universiti Teknologi PETRONAS,Seri Iskandar,Perak 32610,Malaysia [5]Department of Maritime Technology,University Malaysia Terengganu,Kuala Terengganu 21300,Malaysia

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第6期2003-2018,共16页中国有色金属学报（英文版）

基　　金：the National Natural Science Foundation of China (No. 51774323);the Natural Science Foundation of Hunan Province, China (No. 2020JJ4704);the Fundamental Research Funds for the Central Universities of Central South University, China (No. 2018zzts216) the financial support from the China Scholarship Council;the support of the high-performance computer from Compute Canada

摘　　要：Microwave precondition has been highlighted as a promising technology for softening the rock mass prior to rock breakage by machine to reduce drill bit/cutter wear as well as inverse production rate.To numerically explore the effect of numerical parameters on rock static strength simulation,and determine the numerical mechanical parameters of microwave-treated basalts for future drilling and cutting simulations,numerical models of uniaxial compression strength(UCS)and Brazilian tensile strength(BTS)were established with the coupling of smoothed particle hydrodynamics and finite element method(SPH-FEM).To eliminate the large rock strength errors caused by microwave-induced damage,the cohesion and internal friction angle of microwave-treated basalt specimens with the same microwave treatment parameters were calibrated based on a linear Mohr-Coulomb theory.Based on parametric sensitivity analysis of SPH simulation of UCS and BTS,experimental UCS and BTS values were simultaneously captured according to the same set of calibrated cohesion and internal friction angle data,and the UCS modeling results are in good agreement with experimental tests.Furthermore,the effect of microwave irradiation parameter on the basalt mechanical behaviors was evaluated.微波预处理弱化岩体强度,进而降低机械破岩过程中的钻头/刀具磨损、提升凿岩效率已经成为一项极具前景的技术。为探究数值模拟参数对岩石静强度模拟结果的影响,并为后续钻凿或岩石切割模拟确定合理的微波处理玄武岩数值力学参数,采用光滑粒子流体动力学与有限元耦合算法(SPH-FEM)构建岩石单轴压缩与巴西拉伸数值模型。为减小微波损伤对岩石强度测试误差的影响,采用线性莫尔-库仑理论对相同微波参数下微波处理玄武岩试样的黏聚力和内摩擦角进行标定。在单轴抗压与巴西拉伸模拟过程中开展SPH关键控制参数的敏感性分析,并根据同一组校核后的黏聚力和内摩擦角数据,在数值实验中同时捕获目标抗压强度与巴西拉伸强度,单轴抗压强度数值模拟结果与试验结果吻合较好。此外,结合数值模拟结果评估微波辐照参数对玄武岩力学行为的影响。

关 键 词：microwave irradiation microwave-assisted rock breakage rock mechanics smoothed particle hydrodynamics(SPH) parametric sensitivity analysis 

分 类 号：TU45[建筑科学—岩土工程]