工程地质学报2023，Vol.31Issue(6)：1842-1853,12.DOI:10.13544/j.cnki.jeg.2021-0594
含原生隐微裂隙岩石颗粒流模型构建及细观参数标定方法研究
CONSTRUCTION METHOD OF PARTICLE FLOW MODEL FOR ROCK WITH PRIMARY HIDDEN MICRO-FISSURES AND CALIBRATION METH-OD OF MICRO-PARAMETERS
摘要
Abstract
Discrete element simulation is one of the best ways to study the failure mechanism of the rock with frac-ture.The quality of the numerical simulation depends on the accuracy of the particle flow model and the rationality of the micro-parameters.However,the existing researchers usually take the particle flow model with pre-set regular fractures as the research object and pay more attention to the detailed analysis of the simulated phenomenon.The progress of the discrete element model building and the micro-parameters determination are ignored.Therefore,the methods to build the particle flow model of rock with hidden micro-fissures and determine its micro-parameters are established based on previous studies,CT scanning and image digitization technologies.The cryptocrystalline basalt with primarily hidden micro-fissures is taken as an example to apply and verify the methods.The following are found.CT scanning combined with image digitization technology can make the particle flow model of fractured rock more accurate.The micro-parameters of the parallel bond model get through the relationships between the micro-pa-rameters.The mechanical parameters obtained by simulation should be adjusted due to the interaction of parameters.Besides,to determine the micro-parameters used to simulate,the response between micro-parameters and the me-chanical parameters obtained by simulation at different dip angles must be analyzed.For the cryptocrystalline basalt with primarily hidden micro-fissures,the combination of"parallel bond model+smooth joint model"can be better applied to describe the mechanical properties of the contact of its particle flow model.The accuracy of the particle flow model and the rationality of the micro-parameters are greatly enhanced by the proposed methods.In addition,this research also can provide reference for the micro-parameters determination of particle flow model with multiple constitutive models.关键词
隐微裂隙/离散元仿真/岩石/细观参数/CT扫描Key words
Hidden micro-fissures/Discrete element simulation/Rock/Micro-parameters/CT scanning分类
天文与地球科学引用本文复制引用
李志强,刘国锋,晏长根,董凯,崔洁..含原生隐微裂隙岩石颗粒流模型构建及细观参数标定方法研究[J].工程地质学报,2023,31(6):1842-1853,12.基金项目
中央高校基本科研业务费项目(资助号:300102213203),国家自然科学基金(资助号:42002293,42077265).This research is supported by the Fundamental Research Funds for the Central Universities,CHD(Grant No.300102213203)and the National Nat-ural Science Foundation of China(Grant Nos.42002293,42077265). （资助号:300102213203）
