Influence of the oval hole on rock mechanical mechanism under uniaxial and biaxial compression: insights from the combined finite-discrete element method
文献类型：期刊论文
| 作者 | Liu, Ping; Xie, Xianqi; Liu, Quansheng; Deng, Penghai; Huang, Xing; Bo, Yin |
| 刊名 | EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
 |
| 出版日期 | 2022-10-14 |
| ISSN号 | 1964-8189 |
| 关键词 | Combined finite-discrete element method (FDEM) rock containing oval hole uniaxial compression biaxial compression crack propagation brittleness index |
| 英文摘要 | To investigate the effects of the oval hole on the strength and the failure mechanisms of rock materials, a series of uniaxial and biaxial compression numerical simulations were carried out using the combined finite-discrete element method (FDEM). Based on the numerical simulation results, the effects of dip angle (beta), major-minor ratio (omega) and position of the oval hole on rock strength characteristics crack initiation and development process and final failure modes were analysed in detail. The numerical simulation results indicate that: (1) Under uniaxial compression, the ultimate failure modes of rock containing oval holes can be mainly classified into single inclined plane shear failure, X-shaped tensile-shear composite failure and Y-shaped tensile-shear composite failure. Under biaxial compression, the ultimate failure mode is single-inclined plane shear failure dominated by shear cracks. Whether it is uniaxial compression or biaxial compression, the crack initiation position of the main fracture surface is near the end of the major axis of the oval hole. (2) Under uniaxial compression, the axial stress-strain curve of rock containing the oval hole is smooth before and after the peak, but under biaxial compression, there is obvious fluctuation in the post-peak stage due to crack initiation and propagation. In both uniaxial and biaxial compression, the pre-peak elastic stage of the axial stress-strain curve of the rock containing the oval hole is significantly shortened and the peak stress is significantly reduced compared with the intact rock, which indicates that the bearing capacity of the rock is seriously reduced by the existence of oval hole. (3) When the position and major-minor axis ratio of the oval hole remain unchanged, the uniaxial compressive strength and biaxial compressive strength increase with the increase of the dip angle of the oval hole. When the position and dip angle of the oval hole remain unchanged, the uniaxial compressive strength and biaxial compressive strength decrease with the increase of the major-minor axis ratio of the oval hole. (4) At different dip angles, the brittleness index B-i of rock containing oval holes decreases with the increase of confining pressure, and the brittleness degree shows a gradual weakening trend. At the same time, when the dip angle increases, the decreasing amplitude of brittleness index B-i decreases with the increase of confining pressure. |
| 学科主题 | Engineering |
| 语种 | 英语 |
| 出版者 | TAYLOR & FRANCIS LTD |
| WOS记录号 | WOS:000870970400001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34822]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Wuhan University; Wuhan University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Liu, Ping,Xie, Xianqi,Liu, Quansheng,et al. Influence of the oval hole on rock mechanical mechanism under uniaxial and biaxial compression: insights from the combined finite-discrete element method[J]. EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,2022. |
| APA | Liu, Ping,Xie, Xianqi,Liu, Quansheng,Deng, Penghai,Huang, Xing,&Bo, Yin.(2022).Influence of the oval hole on rock mechanical mechanism under uniaxial and biaxial compression: insights from the combined finite-discrete element method.EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING. |
| MLA | Liu, Ping,et al."Influence of the oval hole on rock mechanical mechanism under uniaxial and biaxial compression: insights from the combined finite-discrete element method".EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING (2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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