Effect of disturbance on the progressive failure process of Eastern Himalayan Gneiss
文献类型：期刊论文
| 作者 | Liu, Shijie2; Lan, Hengxing2,3,4,5; Martin, C. Derek1 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2023 |
| 卷号 | 312页码:14 |
| ISSN号 | 0013-7952 |
| 关键词 | Rock mechanics Himalayan gneiss Disturbance Progressive failure Computerised tomography |
| DOI | 10.1016/j.enggeo.2022.106936 |
| 通讯作者 | Lan, Hengxing(lanhx@igsnrr.ac.cn) |
| 英文摘要 | Disturbance induced by stress relief has a significant effect on the laboratory properties of rocks in high in situ stress regions. A better understanding of its mechanism can help evaluate rock properties in regions such as the Tibetan Plateau. In this study, the progressive failure process of gneiss with high disturbance in the eastern Himalayas was explored using triaxial tests, acoustic emission minoring, X-ray computerised tomography (CT), and three-dimensional reconstruction. We established a grading standard to evaluate the impact of disturbances on the mechanical properties of Eastern Himalayas gneiss. With an increase in the degree of disturbance, the compressive strength c and phi decreased. The disturbance exerted a greater influence on the frictional strength than cohesion. In addition, the frictional strength cannot be fully mobilised in gneiss with a high disturbance, which is supported by the unchanged normalised crack initiation stress and the reduction of shear cracks. The internal fracture network reconstructed by CT scanning indicates that the fracture modes of gneiss are deter-mined by the disturbance. With the advancement of disturbance, the main failure mode of gneiss is transformed from shear sliding failure controlled by foliation into splitting failure controlled by microcracks. |
| WOS关键词 | NAMCHE BARWA SYNTAXIS ; TRIAXIAL COMPRESSION ; SAMPLE DISTURBANCE ; BRITTLE FAILURE ; FRACTURE MODES ; INTACT ROCK ; CRYSTALLINE ; EVOLUTION ; STRESS ; DAMAGE |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0904] ; National Natural Science Foundation of China[41941019] ; National Key Research and Development Program of China[2019YFC1520601] ; Fundamental Research Funds for the Central Universities[300102262901] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000896883600002 |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/188157]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lan, Hengxing |
| 作者单位 | 1.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada 2.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 4.Minist Nat Resources, Key Lab Ecol Geol & Disaster Prevent, Xian 710054, Shaanxi, Peoples R China 5.Yanta Rd, Xian 710054, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Shijie,Lan, Hengxing,Martin, C. Derek. Effect of disturbance on the progressive failure process of Eastern Himalayan Gneiss[J]. ENGINEERING GEOLOGY,2023,312:14. |
| APA | Liu, Shijie,Lan, Hengxing,&Martin, C. Derek.(2023).Effect of disturbance on the progressive failure process of Eastern Himalayan Gneiss.ENGINEERING GEOLOGY,312,14. |
| MLA | Liu, Shijie,et al."Effect of disturbance on the progressive failure process of Eastern Himalayan Gneiss".ENGINEERING GEOLOGY 312(2023):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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