Acoustic emission and microfracture analysis of strain rockbursts in deep granite under varying intermediate principal stresses
文献类型：期刊论文
| 作者 | Guo, Guang-tao2,4; Xu, Ding-Ping3; Wu, Xiao-gang2,4; Zhu, Jun-xing2,4; Xu, Huai-sheng1,3; Liu, Xiu-yang1,3 |
| 刊名 | MEASUREMENT
 |
| 出版日期 | 2025 |
| 卷号 | 242页码:16 |
| 关键词 | Strain rockburst B -value RA-AF Fracture morphology Fractal dimension |
| ISSN号 | 0263-2241 |
| DOI | 10.1016/j.measurement.2024.115853 |
| 英文摘要 | Intermediate principal stress significantly influences the occurrence of strain rockbursts. In this study, we employed acoustic emission (AE), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) to investigate strain rockbursts in deeply buried granite under varying intermediate principal stresses. We found that rockburst zones predominantly undergo tensile failure, whereas rockburst pits undergo share failure. With increasing intermediate principal stress, we observed a transition from tensile to shear failure. The presence of main penetrative shear cracks under high-stress conditions resulted in partial absorption of strain energy by the shear surface. As the intermediate principal stress increased, the peak strength first increased from 256.19 to 315.05 MPa and then decreased to 307.98 MPa. The peak strain linearly varied with the intermediate principal stress, whereas the average elastic modulus remained almost constant (approximately 40 GPa). The intensity of rockburst first increased and then decreased. Similarly, the AE ringing counts and cumulative energy first increased and then decreased. The AE b-value followed a similar trend, reaching a minimum of approximately 1.0 at the peak stress, and the rise angle (RA)-average frequency (AF) values for the shear distribution exceeded 90 %. Plagioclase, quartz, and biotite in the rockburst zone experienced transgranular fractures, whereas potassium feldspar underwent both intergranular and transgranular fractures. This study demonstrates that monitoring the intermediate principal stress in surrounding rock masses during the excavation of deep hard rock caverns provides valuable insights into the failure characteristics of potential strain rockburst zones, which can aid in the development of more effective reinforcement measures. |
| 资助项目 | Engineering, China[SKLGME-JBGS2401] |
| WOS研究方向 | Engineering ; Instruments & Instrumentation |
| 语种 | 英语 |
| WOS记录号 | WOS:001333304200001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42815]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xu, Ding-Ping |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Sinosteel Maanshan Inst Min Res Co Ltd, Key Lab Disaster Prevent & Control Noncoal Open pi, Maanshan 243000, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Laboatory Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Sinosteel Maanshan Inst Min Res Co Ltd, State Key Lab Safety & Hlth Met Mines, Maanshan 243000, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Guang-tao,Xu, Ding-Ping,Wu, Xiao-gang,et al. Acoustic emission and microfracture analysis of strain rockbursts in deep granite under varying intermediate principal stresses[J]. MEASUREMENT,2025,242:16. |
| APA | Guo, Guang-tao,Xu, Ding-Ping,Wu, Xiao-gang,Zhu, Jun-xing,Xu, Huai-sheng,&Liu, Xiu-yang.(2025).Acoustic emission and microfracture analysis of strain rockbursts in deep granite under varying intermediate principal stresses.MEASUREMENT,242,16. |
| MLA | Guo, Guang-tao,et al."Acoustic emission and microfracture analysis of strain rockbursts in deep granite under varying intermediate principal stresses".MEASUREMENT 242(2025):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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