Failure Characteristics of Rock Sample during Penetration Tests with the Assistance of Different Free Surface Combinations
文献类型：期刊论文
| 作者 | Xu, Futong1,2; Lu, Jingjing1,2; Zhou, Hui1,2; Xiao, Jiancheng1,2; Gao, Yang1,2 |
| 刊名 | LITHOSPHERE
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 2021页码:18 |
| ISSN号 | 1941-8264 |
| DOI | 10.2113/2022/6216548 |
| 英文摘要 | Free surface-assisted TBM disc cutter for rock breaking is an important direction for the optimizing of TBM cutter structure. To study the influence of free surface on TBM excavation, the free surfaces of limited-width opening and unlimited-width opening were presented, and six different free surface combinations were proposed. The penetration tests of sandstone with different free surface combinations were carried out. The results showed that the rock mass adjacent to the free surface of unlimited-width opening fell off after sample fracture. The rock mass adjacent to the free surface of limited-width opening caused the free surface to close after the rock broke. Under different free surface combinations, the auxiliary effect for rock breaking was not obvious when the free surface depth was shallow, and the failure morphology of the sample changed from vertical splitting to inclined fracture with the increase of free surface depth. The free surface-assisted rock-breaking method can reduce energy consumption during rock breaking. Among all combinations, the cumulative energy before peak load of the SDL sample dropped the most to 37.62% of the intact sample. Finally, the free surface combinations can affect the design of the cutter layout of TBM. |
| 资助项目 | Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[ZDBS-LY-DQC022] ; National Natural Science Foundation of China (NSFC)[41941018] ; China Huaneng Group Technology Project[HNKJ19-H14] ; National Natural Science Foundation of China[52009128] |
| WOS研究方向 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000850462500005 |
| 出版者 | GEOSCIENCEWORLD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37590]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Jingjing |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Futong,Lu, Jingjing,Zhou, Hui,et al. Failure Characteristics of Rock Sample during Penetration Tests with the Assistance of Different Free Surface Combinations[J]. LITHOSPHERE,2021,2021:18. |
| APA | Xu, Futong,Lu, Jingjing,Zhou, Hui,Xiao, Jiancheng,&Gao, Yang.(2021).Failure Characteristics of Rock Sample during Penetration Tests with the Assistance of Different Free Surface Combinations.LITHOSPHERE,2021,18. |
| MLA | Xu, Futong,et al."Failure Characteristics of Rock Sample during Penetration Tests with the Assistance of Different Free Surface Combinations".LITHOSPHERE 2021(2021):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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