Pub Date : 2026-02-10DOI: 10.1016/j.ijrmms.2026.106456
Lijun Liu, Xiaoguang Wang, Qinghua Lei
Fluid injection-induced fault activation and seismicity pose significant risks to the integrity of CO2 geological sequestration projects. This study develops a computational model integrating two-phase fluid flow and geomechanics to investigate the influence of secondary fractures on fault activation and induced seismicity. The frictional strength variation of the fault and fractures is captured by a slip weakening model that incorporates healing mechanisms. A dynamic time-marching scheme is implemented to efficiently capture both slow aseismic slips and rapid seismic ruptures in a densely faulted/fractured reservoir, enabling detailed analysis of energy release during long-term CO2 injection. Our results indicate that secondary fractures facilitate early-stage pressure dissipation, delaying fault slip and reducing seismic events. However, at later stages, secondary fractures contribute to increased seismicity, characterized by larger magnitudes and more extensive rupture zones. Critical pressure analysis reveals that seismicity propagates ahead of the fluid-pressurized zone, indicating that stress transfer plays a key role in triggering induced seismicity. Furthermore, we document a novel mechanism of seismic slip cascades developing in the fracture population, where fracture interactions boosted by stress transfer and aseismic deformation activate a series of fracture clusters to rupture in a bursting manner, promoting the spatial migration of seismic events beyond the fluid pressurization front. These findings provide new insights into the mechanisms of injection-induced seismicity, with far-reaching implications for CO2 sequestration in fractured geological media.
{"title":"Effects of secondary fractures on fault seismic rupture and aseismic slip during CO2 sequestration","authors":"Lijun Liu, Xiaoguang Wang, Qinghua Lei","doi":"10.1016/j.ijrmms.2026.106456","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106456","url":null,"abstract":"Fluid injection-induced fault activation and seismicity pose significant risks to the integrity of CO<ce:inf loc=\"post\">2</ce:inf> geological sequestration projects. This study develops a computational model integrating two-phase fluid flow and geomechanics to investigate the influence of secondary fractures on fault activation and induced seismicity. The frictional strength variation of the fault and fractures is captured by a slip weakening model that incorporates healing mechanisms. A dynamic time-marching scheme is implemented to efficiently capture both slow aseismic slips and rapid seismic ruptures in a densely faulted/fractured reservoir, enabling detailed analysis of energy release during long-term CO<ce:inf loc=\"post\">2</ce:inf> injection. Our results indicate that secondary fractures facilitate early-stage pressure dissipation, delaying fault slip and reducing seismic events. However, at later stages, secondary fractures contribute to increased seismicity, characterized by larger magnitudes and more extensive rupture zones. Critical pressure analysis reveals that seismicity propagates ahead of the fluid-pressurized zone, indicating that stress transfer plays a key role in triggering induced seismicity. Furthermore, we document a novel mechanism of seismic slip cascades developing in the fracture population, where fracture interactions boosted by stress transfer and aseismic deformation activate a series of fracture clusters to rupture in a bursting manner, promoting the spatial migration of seismic events beyond the fluid pressurization front. These findings provide new insights into the mechanisms of injection-induced seismicity, with far-reaching implications for CO<ce:inf loc=\"post\">2</ce:inf> sequestration in fractured geological media.","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"1 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.ijrmms.2026.106438
Chen Xu, Chao Wang, Mingchao Li, Xiaoli Liu
Accurate classification of surrounding rock is vital for ensuring the safety and efficiency of TBM operations. To address the limitations of existing methods, which often overlook ascending-stage dynamics, encounter difficulties in multi-source data fusion, and lack interpretability, this study proposes a Cross-Attention Transformer with XGBoost (CA-Trans-XGBoost). The study uses Section IV of the Yinsong Water Diversion Project as a case study, collecting and organizing 802 days of operational data and cutter replacement records. A Transformer encoder was applied to extract dynamic features from the ascending stage, while an MLP modeled structured features from the stable stage. A cross-attention mechanism was introduced to enhance feature interaction, and fused features were further processed with XGBoost for classification and feature importance analysis. Results show that CA-Trans-XGBoost achieves the best performance among six models, with an Accuracy, Precision, Recall, and Macro-F1 of 95.0 %, 93.6 %, 92.6 %, and 92.9 %, respectively. The model shows clear advantages in identifying minority classes II and V. Further analysis confirms that a 30-s ascending stage is the optimal temporal window. The proposed method balances predictive accuracy and interpretability, providing support for intelligent TBM excavation and parameter optimization.
{"title":"An intelligent recognition and classification method for TBM tunnel surrounding rock based on cross-attention transformer and multi-source data fusion","authors":"Chen Xu, Chao Wang, Mingchao Li, Xiaoli Liu","doi":"10.1016/j.ijrmms.2026.106438","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106438","url":null,"abstract":"Accurate classification of surrounding rock is vital for ensuring the safety and efficiency of TBM operations. To address the limitations of existing methods, which often overlook ascending-stage dynamics, encounter difficulties in multi-source data fusion, and lack interpretability, this study proposes a Cross-Attention Transformer with XGBoost (CA-Trans-XGBoost). The study uses Section IV of the Yinsong Water Diversion Project as a case study, collecting and organizing 802 days of operational data and cutter replacement records. A Transformer encoder was applied to extract dynamic features from the ascending stage, while an MLP modeled structured features from the stable stage. A cross-attention mechanism was introduced to enhance feature interaction, and fused features were further processed with XGBoost for classification and feature importance analysis. Results show that CA-Trans-XGBoost achieves the best performance among six models, with an Accuracy, Precision, Recall, and Macro-F1 of 95.0 %, 93.6 %, 92.6 %, and 92.9 %, respectively. The model shows clear advantages in identifying minority classes II and V. Further analysis confirms that a 30-s ascending stage is the optimal temporal window. The proposed method balances predictive accuracy and interpretability, providing support for intelligent TBM excavation and parameter optimization.","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"9 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Corrigendum to “Fragmentation characteristics and energy components of cylindrical rock specimens in a novel collision system” [Int J Rock Mech Min Sci 191 (2025) 106114]","authors":"Zong-Xian Zhang, Li Yuan Chi, Zida Liu, Toochukwu Ozoji, Chen Huang, Wuxing Wu, Nikhil Bakkamuntala","doi":"10.1016/j.ijrmms.2026.106398","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106398","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"92 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on non-convexity for Zhang-Zhu strength criterion based on microfracture mechanics","authors":"Qi Zhang, Yixin Shen, Hehua Zhu, Xiaojun Wang, Yuechao Pei","doi":"10.1016/j.ijrmms.2026.106452","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106452","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"3 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.ijrmms.2026.106439
J.H. Jeong, Y.J. Shin, S.H. Kim, J.H. Shin
{"title":"Hydraulic convergence-confinement method","authors":"J.H. Jeong, Y.J. Shin, S.H. Kim, J.H. Shin","doi":"10.1016/j.ijrmms.2026.106439","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106439","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"95 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.ijrmms.2026.106443
Nikita Bondarenko, Hyunbin Kim, Kiseok Kim, Roman Y. Makhnenko
{"title":"Experimental insights into CO2 flow in fractured crystalline rock","authors":"Nikita Bondarenko, Hyunbin Kim, Kiseok Kim, Roman Y. Makhnenko","doi":"10.1016/j.ijrmms.2026.106443","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106443","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"42 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-04DOI: 10.1016/j.ijrmms.2026.106423
Cyprien Soulaine, Walid Okaybi, Laurez Fogouang Maya, Emmanuel Le Trong, Sophie Roman
{"title":"Permeability impairment by hydrodynamic pore bridging: Probabilistic pore-network modeling and microfluidic experiments","authors":"Cyprien Soulaine, Walid Okaybi, Laurez Fogouang Maya, Emmanuel Le Trong, Sophie Roman","doi":"10.1016/j.ijrmms.2026.106423","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106423","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"211 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-04DOI: 10.1016/j.ijrmms.2026.106428
Jinkyo Lee, Ki-Bok Min, Liangchao Zou, Vladimir Cvetkovic
{"title":"Effect of fracture shear dilation on flow anisotropy for variable normal stress and fracture size","authors":"Jinkyo Lee, Ki-Bok Min, Liangchao Zou, Vladimir Cvetkovic","doi":"10.1016/j.ijrmms.2026.106428","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106428","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"75 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-03DOI: 10.1016/j.ijrmms.2026.106442
Zhengkuo Ma, Chunshun Zhang, Yiwei Liu, Tong Ye, Haizeng Pan
{"title":"Influence of laser parameters on rock damage: an experimental exploration and machine learning-based predictive modeling","authors":"Zhengkuo Ma, Chunshun Zhang, Yiwei Liu, Tong Ye, Haizeng Pan","doi":"10.1016/j.ijrmms.2026.106442","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106442","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"384 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-03DOI: 10.1016/j.ijrmms.2026.106440
Luming Zhou, Zhihong Zhao, Zhibo Duan, Jun Yang, Yaoyao Zhao, Yunzhe Jin, Yang Wu
{"title":"Experimental and 3D numerical study on the damage and fracture mechanisms of hot dry rock cores under microwave irradiation","authors":"Luming Zhou, Zhihong Zhao, Zhibo Duan, Jun Yang, Yaoyao Zhao, Yunzhe Jin, Yang Wu","doi":"10.1016/j.ijrmms.2026.106440","DOIUrl":"https://doi.org/10.1016/j.ijrmms.2026.106440","url":null,"abstract":"","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"89 1","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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