Experimental investigation on rockburst characteristics of highly stressed D-shape tunnel subjected to impact load
文献类型：期刊论文
| 作者 | Wu, Wuxing1,2,3; Gong, Fengqiang1,3; Zhang, Zongxian2 |
| 刊名 | UNDERGROUND SPACE
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 19页码:153-168 |
| 关键词 | Rockburst Spalling D-shape tunnel Impact load Biaxial prestresses Biaxial Hopkinson pressure bar |
| ISSN号 | 2096-2754 |
| DOI | 10.1016/j.undsp.2024.02.006 |
| 英文摘要 | Rockburst has always been a challenge for the safe construction of deep underground engineering. This study investigated the rockburst characteristics in highly-stressed D-shape tunnels under impact loads from rock blasting and other mining-related dynamics disturbances. The biaxial Hopkinson pressure bar was utilized to apply varying biaxial prestress and the same impact loads to cube specimens with D-shape hole. High-speed camera and digital image correlation (DIC) were used to capture the failure process and strain field of specimen. The test results demonstrate that the D-shape hole specimen experience rockburst under coupled static stress and impact load. Under this circumstance, the rockburst mechanism of the D-shaped hole specimens involves spalling in sidewall induced by impact load, indicating dynamic tensile failure. The high static prestress provides the initial stress field, while the impact load disrupts the stress equilibrium, result in the stress or strain concentration in the sidewall of the D-shape hole, inducing rockburst. Moreover, the rockburst process can be divided into (1) calm stage, (2) crack initiation, propagation, and coalesce stage, (3) spalling stage and (4) rock fragments ejection stage. Impact load triggers rockburst occurrence, while vertical stress further determines the rockburst characteristics. The influence range and magnitude of strain concentration zone and displacement deformation of the tunnel surrounding rock increases with increasing vertical stress, thus inducing more severe rockburst. |
| 资助项目 | National Natural Science Foundation of China[42077244] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020005] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001273420500001 |
| 出版者 | KEAI PUBLISHING LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42053]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Gong, Fengqiang |
| 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 Oulu, Oulu Min Sch, Oulu 90570, Finland 3.Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Wuxing,Gong, Fengqiang,Zhang, Zongxian. Experimental investigation on rockburst characteristics of highly stressed D-shape tunnel subjected to impact load[J]. UNDERGROUND SPACE,2024,19:153-168. |
| APA | Wu, Wuxing,Gong, Fengqiang,&Zhang, Zongxian.(2024).Experimental investigation on rockburst characteristics of highly stressed D-shape tunnel subjected to impact load.UNDERGROUND SPACE,19,153-168. |
| MLA | Wu, Wuxing,et al."Experimental investigation on rockburst characteristics of highly stressed D-shape tunnel subjected to impact load".UNDERGROUND SPACE 19(2024):153-168. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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