基于Flatjoint接触模型的岩石单轴压缩和巴西劈裂颗粒流模拟研究

摘要

基于颗粒流平台，选择Flatjoint接触模型作为岩石模拟的基本模型，用单轴压缩和巴西劈裂数值试验测试岩石宏观参数，对数值试验进行正交设计，采用多因素方差分析和回归分析研究宏细观参数之间的关系。在此基础上，提出了基于岩石单轴压缩和巴西劈裂数值试验的细观参数匹配方法。以灰岩的室内试验为基础，对灰岩细观参数进行了标定，实现了灰岩单轴压缩和巴西劈裂的颗粒流模拟，模拟结果与试验结果相接近，验证了本文方法的有效性。%The Flat-joint bonded-particle material was selected as the basic model for rock simulation.The macro-parameters of rock were calculated through numerical uniaxial compression test and Brazilian splitting test in PFC. Orthogonal design was adopted to conduct numerical tests and multi-factor analysis of variance and regression analy-sis were utilized to analyze the relationship between macro-parameters and meso-parameters.On this basis,method of matching the meso-parameters for numerical uniaxial compression test and Brazilian splitting test was proposed. According to laboratory tests of limestone,the meso-parameters of limestone were obtained and the PFC simulation of uniaxial compression and Brazilian splitting tests of limestone were conducted.The simulation results are close to the laboratory test results,which validated the effectiveness of the proposed method.