Laboratory investigation on the failure characteristics of rock-like materials with fully closed non-persistent joints
文献类型：期刊论文
| 作者 | Cui, Jie; Zhang, Youliang; Jiang, Quan; Lu, Ping; Xie, Peng; Duan, Shusu |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 122 |
| 关键词 | Fully closed non-persistent joint Rock-like material Fracture mechanism Strength anisotropy |
| ISSN号 | 0167-8442 |
| 英文摘要 | Due to dynamic geological conditions, a non-persistent joint network in a fully closed state is often developed in a rock mass, which will seriously affect the cracking process and strength characteristics of the rock mass after excavation and exposure. To reveal the weakening mechanism of closed non-persistent joints in terms of the rock mass strength and the resulting weakening degree, a layered and embedded pouring method for preparing rock-like specimens with closed non-persistent joints is proposed and verified, which overcomes the restriction of specimen preparation technology in research on laboratory testing of the mechanical properties of specimens with fully closed non-persistent joints. On this basis, uniaxial compression testing of specimens with closed non -persistent joint sets of different geometric characteristics is carried out. It is found that the joint orientation is the main factor controlling the failure mode of specimens. With increasing joint dip angle, the failure mode changes from splitting failure to stepped failure, planar failure and, finally, splitting failure. The strength anisotropy characteristics show a typical U shape; the strength of jointed specimens with a 0 degrees dip angle is greater than that with a 90 degrees dip angle, and the center of the distribution of dip angles corresponding to the minimum specimen strength is greater than 45 degrees. This result is related to the friction characteristics of the joint surfaces, and the corresponding failure mode is stepped failure. Finally, by comparing the failure characteristics of specimens with a single open non-persistent joint and a set of such joints, the difference in the anisotropic weakening mecha-nisms and degrees of rock strength caused by fully closed and open joints are further revealed, which provides clearer differential cognition for establishing the strength theory of rock masses with non-persistent joints in different contact states. |
| 学科主题 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000867644700003 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34814]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Hainan University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Cui, Jie,Zhang, Youliang,Jiang, Quan,et al. Laboratory investigation on the failure characteristics of rock-like materials with fully closed non-persistent joints[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,122. |
| APA | Cui, Jie,Zhang, Youliang,Jiang, Quan,Lu, Ping,Xie, Peng,&Duan, Shusu.(2022).Laboratory investigation on the failure characteristics of rock-like materials with fully closed non-persistent joints.THEORETICAL AND APPLIED FRACTURE MECHANICS,122. |
| MLA | Cui, Jie,et al."Laboratory investigation on the failure characteristics of rock-like materials with fully closed non-persistent joints".THEORETICAL AND APPLIED FRACTURE MECHANICS 122(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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