文献类型：期刊文献

中文题名：基于PFC3D模型的岩石宏细观力学参数相关性研究

英文题名：Research on the Relationship Between Meso and Macroscopic Mechanical Parameters of Rock Based on PFC3D Model

作者：崔嘉慧[1];梁奇锋[1]

机构：[1]绍兴文理学院岩土工程系

年份：2019

卷号：0

期号：10

起止页码：8

中文期刊名：科技通报

外文期刊名：Bulletin of Science and Technology

收录：CSTPCD

语种：中文

中文关键词：颗粒流模型;单轴压缩;细观参数;宏观参数

外文关键词：particle flow model;uniaxial compression;microscopic parameters;macroscopic parameters

中文摘要：颗粒流模型的细观参数无法直接从室内试验获取,需对比大量数值结果与物理试验的响应进行标定。为快速、合理的确定岩石材料的细观参数,利用PFC3D模拟室内单轴试验并对结果进行回归分析,建立起单个细观参数与宏观参数间的经验公式,分析岩石颗粒流模型中宏细观参数的关系,结果表明:岩石的泊松比与Kn/ks呈幂函——数增长关系;弹性模量与Ec呈线性增长关系,与kn/ks呈幂函数减小关系;抗压强度主要受平行黏结参数σc、c和φ的影响且与它们均呈正相关关系,同时受kn/ks的影响较弱。最后给出细观参数的匹配步骤,以室内试验为基础进行细观参数标定。模拟结果与试验相近,验证了岩石单轴压缩PFC3D模拟的可行性。

外文摘要：The microscopic parameters of the particle flow model cannot be obtained directly from the laboratory test,it is necessary to calibrate the response of a large number of numerical results and physical tests.In order to determine the microscopic parameters of rock material quickly and reasonably,Using PFC3D to simulate indoor uniaxial tests and regression analysis of the results,The empirical formula of single microscopic parameters and macroscopic parameters was established,and the relationship between micro and macro parameters in the rock particle flow model was analyzed,the results show that:The Poisson’s ratio of rock and Kn/ks show a power function growth relationship;The elastic modulus shows a linear growth relationship with Ec,and it shows a decreasing power function with kn/ks;Thecompressive strength was mainly affected by parallel bonding parametersσc,c,φand positively correlated with them,and is also weakly affected by kn/ks.Finally,the matching steps of the microscopic parameters are given,and the microscopic are calibrated based on laboratory tests.The simulation results are similar to the experiments,which verifies the feasibility of uniaxial compression of PFC3D.