2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway
This paper focuses on the reinforcement effect of full-face anchorage in thick soft rock roadway. A 2D semimodel of full-face anchorage in roadway with thick surrounding soft rock was proposed firstly by transforming the confinement effect of the excavation face in the longitudinal direction as the...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/9853853 |
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| _version_ | 1849308638618845184 |
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| author | Xianzhou Lyu Zenghui Zhao Qing Ma Xiaojie Wang Xiaojie Gao |
| author_facet | Xianzhou Lyu Zenghui Zhao Qing Ma Xiaojie Wang Xiaojie Gao |
| author_sort | Xianzhou Lyu |
| collection | DOAJ |
| description | This paper focuses on the reinforcement effect of full-face anchorage in thick soft rock roadway. A 2D semimodel of full-face anchorage in roadway with thick surrounding soft rock was proposed firstly by transforming the confinement effect of the excavation face in the longitudinal direction as the virtual internal support force at the circumferential surface. Then, based on the theory of elasticity, the theoretical model of the coupling effect between surrounding rock and anchoring system was established, and the analytical solutions of stress and displacement were obtained employing superposition principle. Finally, the theoretical solution was verified by numerical simulation, and the distribution laws of stress release-anchor stock-surrounding rock coupling were analyzed in detail considering stress release. Results demonstrated that the stress field of the surrounding rock diverse widely with different stress release coefficients. With the increasing of stress release coefficient, the radial stress of the surrounding rock decreases, while the tangential stress increases. The supporting role of the bolt is mainly reflected in improving the radial stress of the anchorage zone. However, it has little effect on the tangential stress. What is more, the anchoring effect is more significant to soft rock stress than hard rock. In addition, the prestress of rock bolt has a certain matching relation with the bolt parameters, the surrounding rock parameters, and the initial stress. This study laid a theoretical foundation for further analysis of the interaction between surrounding rock and bolt supporting in plastic zone. |
| format | Article |
| id | doaj-art-0e5955b5fed64ae99414bab2749cd6ea |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-0e5955b5fed64ae99414bab2749cd6ea2025-08-20T03:54:24ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/985385398538532D Semimodel of Full-Section Anchorage in Thick Soft Rock RoadwayXianzhou Lyu0Zenghui Zhao1Qing Ma2Xiaojie Wang3Xiaojie Gao4College of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Qingdao 266590, ChinaCollege of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Qingdao 266590, ChinaThis paper focuses on the reinforcement effect of full-face anchorage in thick soft rock roadway. A 2D semimodel of full-face anchorage in roadway with thick surrounding soft rock was proposed firstly by transforming the confinement effect of the excavation face in the longitudinal direction as the virtual internal support force at the circumferential surface. Then, based on the theory of elasticity, the theoretical model of the coupling effect between surrounding rock and anchoring system was established, and the analytical solutions of stress and displacement were obtained employing superposition principle. Finally, the theoretical solution was verified by numerical simulation, and the distribution laws of stress release-anchor stock-surrounding rock coupling were analyzed in detail considering stress release. Results demonstrated that the stress field of the surrounding rock diverse widely with different stress release coefficients. With the increasing of stress release coefficient, the radial stress of the surrounding rock decreases, while the tangential stress increases. The supporting role of the bolt is mainly reflected in improving the radial stress of the anchorage zone. However, it has little effect on the tangential stress. What is more, the anchoring effect is more significant to soft rock stress than hard rock. In addition, the prestress of rock bolt has a certain matching relation with the bolt parameters, the surrounding rock parameters, and the initial stress. This study laid a theoretical foundation for further analysis of the interaction between surrounding rock and bolt supporting in plastic zone.http://dx.doi.org/10.1155/2018/9853853 |
| spellingShingle | Xianzhou Lyu Zenghui Zhao Qing Ma Xiaojie Wang Xiaojie Gao 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway Shock and Vibration |
| title | 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway |
| title_full | 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway |
| title_fullStr | 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway |
| title_full_unstemmed | 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway |
| title_short | 2D Semimodel of Full-Section Anchorage in Thick Soft Rock Roadway |
| title_sort | 2d semimodel of full section anchorage in thick soft rock roadway |
| url | http://dx.doi.org/10.1155/2018/9853853 |
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