Mechanical Characteristics of Similar Weakly Cemented Soft Rock under Directional Shear Stress Path and Modified Lade-Duncan Criterion
文献类型：期刊论文
| 作者 | Liu, Jiashun2,3,4; Zheng, Zhiyong2; Zhou, Hui3; Zhou, Ni2; Wang, Yang2; Sun, Mengyao2; Yang, Yang1 |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 24期号:11页码:12 |
| 关键词 | Weakly cemented soft rock Directional shear stress Principal-stress direction Lade-Duncan strength criterion Peak stress ratio |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/IJGNAI.GMENG-10680 |
| 英文摘要 | To avoid engineering challenges during roadway excavation or workface mining in weakly cemented soft rock, the characteristics of this rock under the influence of associated stress paths must be explored. Therefore, this study investigates the principal strain and generalized shear strain of weakly cemented soft rock under a directional shear stress path, through a series of principal-stress directional shear tests conducted using a hollow cylinder apparatus. The damage morphology characteristics for different major principal-stress directions are also discussed. The results show that the major principal strain (epsilon 1) gradually increased with increasing major principal-stress direction angle (alpha), when alpha ranges from 0 degrees to 45 degrees, whereas the minor principal strain (epsilon 3) and intermediate principal strain (epsilon 2) gradually decreased. The peak stress of the soft rock gradually decreased and a main slip-damage crack developed in the major principal-stress direction. The peak generalized shear strain increased slowly in the first compression-torsion stage and rapidly in the second. As alpha ranges from 45 degrees to 90 degrees, epsilon 1 and epsilon 2 decreased gradually whereas epsilon 3 increased gradually. The peak stress also increased slowly, with the main crack developing in the minor principal-stress direction. Additionally, the peak generalized shear strain rapidly decreased in the first tension-torsion stage and then slowly decreased in the second. The principal-stress rotation space transformation matrix was introduced to modify the Lade-Duncan (L-D) criterion, and the criterion reliability was verified using the peak value of the soft rock deviatoric stress under different principal-stress directions. The modified L-D criterion considered the effects of both the principal-stress magnitude and direction. The results are of great significance for studying the influence of principal-stress direction and provide an important method to investigate the mechanical properties of rocks with complex stress paths comprehensively. |
| 资助项目 | National Natural Science Foundation of China[52104088] ; National Natural Science Foundation of China[52374091] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering[SKLGME022021] ; China Postdoctoral Science Foundation[2022M713383] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001313690100018 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42520]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Jiashun |
| 作者单位 | 1.China Railway Ninth Bur Grp Fourth Engn Co Ltd, Shenyang 110013, Peoples R China 2.Liaoning Tech Univ, Sch Civil Engn, Fuxin 123000, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jiashun,Zheng, Zhiyong,Zhou, Hui,et al. Mechanical Characteristics of Similar Weakly Cemented Soft Rock under Directional Shear Stress Path and Modified Lade-Duncan Criterion[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2024,24(11):12. |
| APA | Liu, Jiashun.,Zheng, Zhiyong.,Zhou, Hui.,Zhou, Ni.,Wang, Yang.,...&Yang, Yang.(2024).Mechanical Characteristics of Similar Weakly Cemented Soft Rock under Directional Shear Stress Path and Modified Lade-Duncan Criterion.INTERNATIONAL JOURNAL OF GEOMECHANICS,24(11),12. |
| MLA | Liu, Jiashun,et al."Mechanical Characteristics of Similar Weakly Cemented Soft Rock under Directional Shear Stress Path and Modified Lade-Duncan Criterion".INTERNATIONAL JOURNAL OF GEOMECHANICS 24.11(2024):12. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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