Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading
This study investigates the dynamic crack propagation mechanism in damaged rocks under blasting excavation in complex geological conditions. A novel rock fracture analysis method based on pre-compression-induced random damage is proposed, overcoming the limitations of traditional prefabricated crack...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Ain Shams Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447925000437 |
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| author | Qiangqiang Zheng Pingfeng Li Ying Xu Bing Cheng Hao Hu Hao Shi Shoudong Xie |
| author_facet | Qiangqiang Zheng Pingfeng Li Ying Xu Bing Cheng Hao Hu Hao Shi Shoudong Xie |
| author_sort | Qiangqiang Zheng |
| collection | DOAJ |
| description | This study investigates the dynamic crack propagation mechanism in damaged rocks under blasting excavation in complex geological conditions. A novel rock fracture analysis method based on pre-compression-induced random damage is proposed, overcoming the limitations of traditional prefabricated crack models. Innovatively, multi-level cyclic static pre-compression is applied to simulate the random damage distribution in engineering-scale rocks, combined with high-resolution computed tomography (CT) imaging to achieve non-destructive 3D visualization of internal crack morphologies under explosive loading. A theoretical model for predicting blast-induced crack propagation radius in damaged sandstone is established and validated through integrated laboratory blast experiments, CT scanning, and PFC-2D numerical simulations, demonstrating a prediction error margin below 5%. Key findings reveal a significant positive correlation between sandstone damage levels and the expansion range of blast-induced cracks as well as crater dimensions. The pre-existing crack network in damaged rocks effectively guides gas wedging effects, unveiling a “weakening-synergistic fracturing” dual mechanism. These results provide theoretical foundations and technical support for optimizing blasting parameters and mitigating dynamic disasters in tunnel engineering under complex geological settings. |
| format | Article |
| id | doaj-art-77f912d5be614c6998428e77c95d5f2a |
| institution | Kabale University |
| issn | 2090-4479 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj-art-77f912d5be614c6998428e77c95d5f2a2025-02-09T05:00:02ZengElsevierAin Shams Engineering Journal2090-44792025-03-01163103302Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loadingQiangqiang Zheng0Pingfeng Li1Ying Xu2Bing Cheng3Hao Hu4Hao Shi5Shoudong Xie6Anhui Engineering Research Center of New Explosive Materials and Blasting Technology of Anhui University of Science and Technology, Anhui University of Science and Technology, Huainan, Anhui 232001, China; Key Laboratory of Safety Intelligent Mining in Non-coal Open-pit Mines, National Mine Safety Administration, Guangzhou 510000, China; State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, China; Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; Corresponding authors.Key Laboratory of Safety Intelligent Mining in Non-coal Open-pit Mines, National Mine Safety Administration, Guangzhou 510000, China; Hongda Blasting Engineering Group Co., Ltd., Changsha, Hunan 410011, China; Corresponding authors.Anhui Engineering Research Center of New Explosive Materials and Blasting Technology of Anhui University of Science and Technology, Anhui University of Science and Technology, Huainan, Anhui 232001, China; State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaAnhui Engineering Research Center of New Explosive Materials and Blasting Technology of Anhui University of Science and Technology, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaAnhui Engineering Research Center of New Explosive Materials and Blasting Technology of Anhui University of Science and Technology, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaKey Laboratory of Safety Intelligent Mining in Non-coal Open-pit Mines, National Mine Safety Administration, Guangzhou 510000, China; Hongda Blasting Engineering Group Co., Ltd., Changsha, Hunan 410011, ChinaThis study investigates the dynamic crack propagation mechanism in damaged rocks under blasting excavation in complex geological conditions. A novel rock fracture analysis method based on pre-compression-induced random damage is proposed, overcoming the limitations of traditional prefabricated crack models. Innovatively, multi-level cyclic static pre-compression is applied to simulate the random damage distribution in engineering-scale rocks, combined with high-resolution computed tomography (CT) imaging to achieve non-destructive 3D visualization of internal crack morphologies under explosive loading. A theoretical model for predicting blast-induced crack propagation radius in damaged sandstone is established and validated through integrated laboratory blast experiments, CT scanning, and PFC-2D numerical simulations, demonstrating a prediction error margin below 5%. Key findings reveal a significant positive correlation between sandstone damage levels and the expansion range of blast-induced cracks as well as crater dimensions. The pre-existing crack network in damaged rocks effectively guides gas wedging effects, unveiling a “weakening-synergistic fracturing” dual mechanism. These results provide theoretical foundations and technical support for optimizing blasting parameters and mitigating dynamic disasters in tunnel engineering under complex geological settings.http://www.sciencedirect.com/science/article/pii/S2090447925000437Blast loadingCrack propagationPre-compressionFracture zoneCT imaging |
| spellingShingle | Qiangqiang Zheng Pingfeng Li Ying Xu Bing Cheng Hao Hu Hao Shi Shoudong Xie Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading Ain Shams Engineering Journal Blast loading Crack propagation Pre-compression Fracture zone CT imaging |
| title | Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading |
| title_full | Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading |
| title_fullStr | Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading |
| title_full_unstemmed | Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading |
| title_short | Crack propagation and CT imaging of internal cracks in rocks damaged by pre-compression under explosive loading |
| title_sort | crack propagation and ct imaging of internal cracks in rocks damaged by pre compression under explosive loading |
| topic | Blast loading Crack propagation Pre-compression Fracture zone CT imaging |
| url | http://www.sciencedirect.com/science/article/pii/S2090447925000437 |
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