Understanding the effect of differential stress and fracture geometry on blast-induced damage in crystalline rocks: a numerical approach
文献类型：期刊论文
| 作者 | Wang, Guibin2; Liu, Huandui2,3; Zhang, Junyue1; Chen, Shiwan4 |
| 刊名 | COMPUTATIONAL PARTICLE MECHANICS
 |
| 出版日期 | 2024-02-23 |
| 页码 | 21 |
| 关键词 | Blasting Excavation damaged zone Fractures Particle-based discrete element method Secondary fracture |
| ISSN号 | 2196-4378 |
| DOI | 10.1007/s40571-024-00722-1 |
| 英文摘要 | This study employs numerical simulations to scrutinize the influence of pre-existing fractures and in situ stress states on blast-induced crack propagation in fractured rocks. The geomechanical behavior of fractured rocks is simulated via a particle-based discrete element model with particles constructed and assembled by the Voronoi tessellation scheme based on the grain-size distribution of actual rock samples (specifically, Beishan granite), which captures solid vibrations under dynamic loading and realistically responds to crack growth and fracture displacement. The reliability of the model is also validated using Snell's law and fracture mechanics. Based on the model, the effects of stress states and fracture configurations (such as single isolated fracture and two interacting fractures) on damage evolution are examined. It was observed that when the differential stress is aligned (or perpendicular) with the blasting wave, it amplifies (or reduces) the damaging effect of the blasting wave on the rock mass in most instances. The effect of the differential stress on the blasting wave is similar to that of an increase (or reduction) in the amplitude of the blasting wave. When the differential stress exceeds the tensile cracking stress, rock damage sharply escalates due to the generation of a plastic region, regardless of the angle between the blasting wave and differential stress. Meanwhile, a study of two interacting fractures reveals that differences in fracture geometry lead to different stress concentration and shadow zones in the specimen. This changes the location and extent of crack development and ultimately affects the strength of the rock. The findings from our simulations provide critical insights for understanding and characterizing excavation damage zones around underground excavations in fractured crystalline rock obtained by drilling and blasting methods and also provide safety predictions for constructed neighboring structures under dynamic loads. |
| 资助项目 | National Natural Science Foundation of China[42272321] ; National Natural Science Foundation of China[42162027] ; National Natural Science Foundation of China[41902301] ; National Natural Science Foundation of China-Youth Found ; Project of Decommissioning of Nuclear Facilities and Radioactive Waste Management ; Department of Earth Sciences at the Uppsala University |
| WOS研究方向 | Mathematics ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001169822300001 |
| 出版者 | SPRINGER INT PUBL AG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40718]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Huandui |
| 作者单位 | 1.Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Guizhou Univ, Coll Resources & Environm Engn, Guiyang 50025, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Guibin,Liu, Huandui,Zhang, Junyue,et al. Understanding the effect of differential stress and fracture geometry on blast-induced damage in crystalline rocks: a numerical approach[J]. COMPUTATIONAL PARTICLE MECHANICS,2024:21. |
| APA | Wang, Guibin,Liu, Huandui,Zhang, Junyue,&Chen, Shiwan.(2024).Understanding the effect of differential stress and fracture geometry on blast-induced damage in crystalline rocks: a numerical approach.COMPUTATIONAL PARTICLE MECHANICS,21. |
| MLA | Wang, Guibin,et al."Understanding the effect of differential stress and fracture geometry on blast-induced damage in crystalline rocks: a numerical approach".COMPUTATIONAL PARTICLE MECHANICS (2024):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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