Numerical modeling and damage evolution research on the effect of joint geometrical parameters in nonpersistent jointed rock masses

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2023-03-24 DOI:10.1007/s10064-023-03143-1

Dan Huang, Wen Tang, Xiao-qing Li

{"title":"Numerical modeling and damage evolution research on the effect of joint geometrical parameters in nonpersistent jointed rock masses","authors":"Dan Huang, Wen Tang, Xiao-qing Li","doi":"10.1007/s10064-023-03143-1","DOIUrl":null,"url":null,"abstract":"<div><p>The strength and deformation of rock masses containing nonpersistent joints are controlled by the complex interactions of joints and intact rock bridges; exploring the relationship between them is the basis of understanding the failure process in the model. In this work, discrete fracture network (DFN) technology was used to construct the fracture system, and synthetic rock mass (SRM) technology was utilized to represent rock masses containing a set of nonpersistent joints. The effect of geometrical parameters (joint dip angle, joint length, and joint density) on the mechanical properties and failure mechanism of the models was studied. The stress redistribution method was used to investigate the failure process of the nonpersistent jointed rock mass under uniaxial compression, and the mechanisms are successfully explained according to their different cracking process. Six failure modes are predicted: through a plane, stepped, rotation of new blocks, mixed, multiplane stepped, and shearing through intact rock. Damage mechanics were suitable for analysis of the nonpersistent joint model, and the initial damage variable was determined by geometrical parameters. Overall, the damage constitutive model fits the stress–strain curve of numerical simulation well and is more suitable for brittle failure of a jointed rock mass than ductile and plastic failure.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"82 4","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-023-03143-1","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 1

Abstract

The strength and deformation of rock masses containing nonpersistent joints are controlled by the complex interactions of joints and intact rock bridges; exploring the relationship between them is the basis of understanding the failure process in the model. In this work, discrete fracture network (DFN) technology was used to construct the fracture system, and synthetic rock mass (SRM) technology was utilized to represent rock masses containing a set of nonpersistent joints. The effect of geometrical parameters (joint dip angle, joint length, and joint density) on the mechanical properties and failure mechanism of the models was studied. The stress redistribution method was used to investigate the failure process of the nonpersistent jointed rock mass under uniaxial compression, and the mechanisms are successfully explained according to their different cracking process. Six failure modes are predicted: through a plane, stepped, rotation of new blocks, mixed, multiplane stepped, and shearing through intact rock. Damage mechanics were suitable for analysis of the nonpersistent joint model, and the initial damage variable was determined by geometrical parameters. Overall, the damage constitutive model fits the stress–strain curve of numerical simulation well and is more suitable for brittle failure of a jointed rock mass than ductile and plastic failure.

查看原文本刊更多论文

非持续性节理岩体节理几何参数影响的数值模拟与损伤演化研究

含非持久节理岩体的强度和变形受节理与完整岩桥的复杂相互作用控制;探索它们之间的关系是理解模型失效过程的基础。本文采用离散裂隙网络(DFN)技术构建裂隙系统，采用合成岩体(SRM)技术表示包含一组非持续性节理的岩体。研究了几何参数(节理倾角、节理长度和节理密度)对模型力学性能和破坏机理的影响。采用应力重分布方法研究了非持续性节理岩体在单轴压缩下的破坏过程，并根据其不同的开裂过程成功地解释了其破坏机制。预测了六种破坏模式:平面破坏、阶梯破坏、新块体旋转破坏、混合破坏、多平面阶梯破坏和剪切破坏完整岩石破坏。损伤力学适用于非持久节点模型的分析，初始损伤变量由几何参数确定。总体而言，该损伤本构模型与数值模拟的应力-应变曲线拟合较好，较适合于节理岩体的脆性破坏而非延塑性破坏。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.