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[1]王中文,徐颖,谢守冬,等.岩石冻融损伤细观特征数值模拟研究*[J].中国安全生产科学技术,2023,19(11):143-149.[doi:10.11731/j.issn.1673-193x.2023.11.020]
　WANG Zhongwen,XU Ying,XIE Shoudong,et al.Numerical simulation study on mesoscopic characteristics of rock freeze-thaw damage[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(11):143-149.[doi:10.11731/j.issn.1673-193x.2023.11.020]
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岩石冻融损伤细观特征数值模拟研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年11期
页码:
143-149
栏目:
职业安全卫生管理与技术
出版日期:
2023-11-30

文章信息/Info

Title:
Numerical simulation study on mesoscopic characteristics of rock freeze-thaw damage
文章编号:
1673-193X(2023)-11-0143-07
作者:
王中文; 徐颖; 谢守冬; 焦杨浩楠; 于美鲁; 谢昊天
(1.安徽理工大学 深部煤矿采动响应与灾害防控国家重点实验室，安徽 淮南 232001；
2.安徽理工大学 土木建筑学院，安徽 淮南 232001；
3.宏大爆破工程集团有限责任公司，广东 广州 510623)
Author(s):
WANG Zhongwen;  XU Ying;  XIE Shoudong;  JIAO Yanghaonan;  YU Meilu;  XIE Haotian
(1.State Key Laboratory of Mining Responses and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science & Technology,Huainan Anhui 232001,China;
2.School of Civil Engineering and Architecture,Anhui University of Science & Technology,Huainan Anhui 232001,China;
3.Hongda Holdings Engineering Group Co.,Ltd.,Guangzhou Guangdong 510623,China)
关键词:
冻融循环; 冻胀变形; 细观特征; PFC
Keywords:
freeze-thaw cycle;  freeze-swelling deformation;  mesoscopic characteristic;  PFC
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2023.11.020
文献标志码:
A
摘要:
为了研究岩石在冻融循环作用下所产生的细观损伤，基于PFC软件，采用水颗粒体积膨胀所产生的膨胀力等效为冻胀力方法来模拟岩石冻融循环过程，结合岩石冻融循环后岩石单轴试验，从颗粒间的接触力、位移和微裂纹发展过程等细观层面对砂岩冻融损伤过程进行分析。研究结果表明：随着冻融次数的增加，试样边界区域相比中心区域更容易发生损伤，颗粒间接触量及接触力逐渐减小，导致裂纹数量增加，并以拉伸裂纹为主，但剪切裂纹占比在逐渐增加。研究结果可为寒区矿产资源安全开采提供理论依据。
Abstract:
In order to study the mesoscopic damage of rock under the action of freeze-thaw cycle,based on the PFC software,the expansion force generated by the volume expansion of water particles was equivalent to the freezing force,so as to simulate the process of freeze-thaw cycle of rock.Combined with the uniaxial test of rock after freeze-thaw cycle,the freeze-thaw damage process of sandstone was analyzed from the mesoscopic perspectives of the contact force between particles,the displacement and the development process of microcracks.The results show that with the increase of the number of freeze-thaw cycles,the boundary area of the specimen is more prone to damage than the center area.The gradual decrease of the contact amount and contact force between particles leads to an increase in the number of cracks,which is dominated by tensile cracks,but the proportion of shear cracks is gradually increasing.The results can provide a theoretical basis for the safe exploitation of mineral resources in cold regions.

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备注/Memo

备注/Memo:
收稿日期： 2023-07-05
* 基金项目： 国家自然科学基金项目(52274071)
作者简介： 王中文，硕士研究生，主要研究方向为寒区岩石损伤力学。
通信作者： 徐颖，博士，教授，主要研究方向为岩石土工程、爆破工程和冲击动力学。
更新日期/Last Update: 2023-12-06