Crack propagation mechanism of smooth blasting holes for tunnel excavation under high in-situ stress
文献类型：期刊论文
| 作者 | Lu, Ang1,4,5; Yan, Peng1,5; Lu, Wenbo1,5; Li, Xiaofeng3; Liu, Xiao1,5; Luo, Sheng2; Huang, Shuling2; Grasselli, Giovanni4 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2024-06-19 |
| 卷号 | 304页码:19 |
| 关键词 | Smooth blasting High in -situ stress FDEM Crack propagation Crush zone |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2024.110144 |
| 英文摘要 | Smooth blasting is an important excavation method in tunnel construction, creating a smooth and even excavation profile during the excavation process. In this study, the influence of in-situ stress, hole spacing, and radial decoupling coefficient on the superposition of blasting stress and the cracking characteristic between holes were investigated by using integrated analytical and numerical analyses (FDEM). Based on those results, the design of smooth blasting parameters considering the influence of in-situ stress were suggested, and verified against the data collected during the blasting excavation of diversion tunnel at Jinping II hydropower station. The results indicated that the propagation of blast-induced fractures are significantly influenced by the insitu stress conditions, tending to extend towards the direction of the maximum principal stress thus the holes should be arranged along the direction of the maximum principal stress to ensure the formation of cracks between holes and smooth excavation of the wall. |
| 资助项目 | National Natural Science Foundation of China[52379108] ; Open Research Fund Project of Changjiang River Scientific Research Institute[CKWV2019742/KY] ; Central Public-Interest Scientific Institution Basal Research Fund[CKSF2023308/YT] ; Chinese Scholarship Council[202106270104] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001243774200001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41734]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yan, Peng |
| 作者单位 | 1.Wuhan Univ, State Key Lab Water Resources Engn & Management, Wuhan 430072, Hubei, Peoples R China 2.Minist Water Resources, Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Wuhan 430010, Hubei, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Univ Toronto, Dept Civil & Mineral Engn, Toronto, ON M5S 1A4, Canada 5.Wuhan Univ, Key Lab Rock Mech Hydraul Struct Engn, Minist Educ, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Ang,Yan, Peng,Lu, Wenbo,et al. Crack propagation mechanism of smooth blasting holes for tunnel excavation under high in-situ stress[J]. ENGINEERING FRACTURE MECHANICS,2024,304:19. |
| APA | Lu, Ang.,Yan, Peng.,Lu, Wenbo.,Li, Xiaofeng.,Liu, Xiao.,...&Grasselli, Giovanni.(2024).Crack propagation mechanism of smooth blasting holes for tunnel excavation under high in-situ stress.ENGINEERING FRACTURE MECHANICS,304,19. |
| MLA | Lu, Ang,et al."Crack propagation mechanism of smooth blasting holes for tunnel excavation under high in-situ stress".ENGINEERING FRACTURE MECHANICS 304(2024):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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