|本期目录/Table of Contents|

[1]韩森,张钦礼.3D Voronoi等效晶质模型在岩石破坏细观研究中的应用[J].中国安全生产科学技术,2019,15(6):88-93.[doi:10.11731/j.issn.1673-193x.2019.06.014]
　HAN Sen,ZHANG Qinli.Application of 3D Voronoi equivalent crystal model in microscopic study of rock failure[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(6):88-93.[doi:10.11731/j.issn.1673-193x.2019.06.014]
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3D Voronoi等效晶质模型在岩石破坏细观研究中的应用
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年6期
页码:
88-93
栏目:
职业安全卫生管理与技术
出版日期:
2019-06-30

文章信息/Info

Title:
Application of 3D Voronoi equivalent crystal model in microscopic study of rock failure
文章编号:
1673-193X(2019)-06-0088-06
作者:
韩森1; 2;  张钦礼1
（1. 中南大学 资源与安全工程学院，湖南 长沙 410083；
2. 湖南有色金属研究院，湖南 长沙 410100）
Author(s):
HAN Sen1; 2;  ZHANG Qinli1
(1. School of Resources and Safety Engineering, Central South University, Changsha Hunan 410083, China;
2. Hunan Research Institute for Nonferrous Metals, Changsha Hunan 410100, China)
关键词:
岩石力学; 颗粒流程序; 3D Voronoi等效晶质模型; 细观研究; 裂纹扩展
Keywords:
rock mechanics;  particle flow code;  3D Voronoi equivalent crystal model;  microscopic study ;  crack propagation
分类号:
X937;TU45
DOI:
10.11731/j.issn.1673-193x.2019.06.014
文献标志码:
A
摘要:
基于3D Voronoi图提出一种能够反映岩石矿物晶粒结构的三维精细化建模方法，分析了晶粒排列均匀化程度及大小等微观结构的变化对模型宏观力学性质的影响程度，并进行了晶粒结构优化设计。通过模拟粉砂质板岩单轴压缩和巴西劈裂的破坏过程，以及与室内试验对比验证了其适用性，并从细观角度揭示了岩石的破坏机理。研究结果表明：通过裂纹生长速率大致可以表征室内试验中弹性变形、非弹性变形和峰值后宏观破坏阶段；岩样在单轴压缩和巴西劈裂破坏过程中以拉伸断裂为主,在宏观上表现为脆性断裂；岩样宏观断裂呈现沿晶和穿晶断裂的组合形态，弹性变形阶段裂纹的萌生和扩展以沿晶断裂为主，而穿晶断裂的扩展和贯通往往导致局部失稳，表现为非弹性变形阶段。
Abstract:
A threedimensional fine modeling method which could reflect the mineral grain structure of rock was proposed based on the 3D Voronoi diagram, then the influence of the change of microstructure such as arrangement homogenization degree and size of grain on the macro mechanical properties of the model was analyzed, and the optimization design of grain structure was carried out. The failure process of silty slate under the uniaxial compression and Brazilian splitting was simulated, then its applicability was verified by the comparison with laboratory tests, and the failure mechanism of rock was revealed from the microscopic perspective. The results showed that the crack growth rate could roughly characterize the elastic deformation, inelastic deformation and postpeak macrofailure stages in the laboratory tests. In the process of uniaxial compression and Brazilian splitting failure of rock samples, the tensile fracture was dominant, which presented as brittle fracture macroscopically. The macroscopic fracture of rock sample presented a combination form of intergranular and transgranular fracture, and in the elastic deformation stage, the initiation and propagation of crack were mainly the intergranular fracture, however, the propagation and penetration of transgranular fracture often led to the local instability, which was manifested in the stage of inelastic deformation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期： 2019-04-04
* 基金项目： “十二五”国家科技支撑计划项目（2013BAB02B05）
作者简介： 韩森，博士研究生，主要研究方向为采矿工艺及安全。
更新日期/Last Update: 2019-07-09