The effect of in-situ stress on blast-induced rock fracture and damage zone
文献类型：期刊论文
| 作者 | Li, Qian1,2; Li, Haibo1,2 ; Fu, Shuaiyang1,2; Li, Xiaofeng1,2
|
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 154页码:18 |
| 关键词 | Rock blasting In-situ stress Blast damage Blast fracturing Finite-discrete element method (FDEM) |
| ISSN号 | 0886-7798 |
| DOI | 10.1016/j.tust.2024.106091 |
| 英文摘要 | The pervasive demand for dynamic rock breakage has cast a new light on the potential challenges involved in blast-induced underground excavations with complex geological conditions. Due to the complexities and highcost issues associated with field tests, the finite-discrete element method (FDEM) is adopted in this study to explore the evolution of blast-induced damage zone, including the extent of the crushed zone and the propagation of tensile fractures. The influence of different durations time and peak pressure of blast loads, as well as the magnitude and anisotropy of in-situ stress are considered. The consistency and reliability of the numerical model are calibrated against the results obtained from test measurements. It is observed that the extent of damage zone shows a linear correlation with the duration of the blast load. A longer blast wave duration increases the size of both the crushed and cracked zones. The peak pressure of the blast load significantly influences the enlargement of the damage zone, particularly when it exceeds a critical threshold about 3 GPa. Furthermore, the length of the tensile fractures is constrained by high in-situ stress. The size of the cracked zone decreases sharply once the stress exceeds 10 MPa. The tendency of fractures propagating towards the direction of maximum principal stress is also enhanced by an increase in magnitude and anisotropy of the in-situ stress. The PPV recorded in the near field of the borehole decrease from 150 m/s to 0.5 m/s with attenuation coefficient alpha ranges from 1.526 to 1.603, which agrees well with the field tests. |
| 资助项目 | National Science Foundation of China[U22A20239] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001319104600001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42623]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Xiaofeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Qian,Li, Haibo,Fu, Shuaiyang,et al. The effect of in-situ stress on blast-induced rock fracture and damage zone[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2024,154:18. |
| APA | Li, Qian,Li, Haibo,Fu, Shuaiyang,&Li, Xiaofeng.(2024).The effect of in-situ stress on blast-induced rock fracture and damage zone.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,154,18. |
| MLA | Li, Qian,et al."The effect of in-situ stress on blast-induced rock fracture and damage zone".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 154(2024):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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