Back analysis of long-term stability of a 92 m span ancient quarrying cavern
Long-term stability of large-span caverns is a challenging issue for design and construction of underground rock engineering. The Heidong cavern group consisting of 21 caverns was constructed about 1400 years ago for quarrying in massive Cretaceous tuff. The cavern No. 5 of the Heidong cavern group...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-04-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775517300781 |
| _version_ | 1818594720203407360 |
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| author | Yanjun Shang Lihui Li Wantong He Luqing Zhang Tianbin Li Zhifa Yang |
| author_facet | Yanjun Shang Lihui Li Wantong He Luqing Zhang Tianbin Li Zhifa Yang |
| author_sort | Yanjun Shang |
| collection | DOAJ |
| description | Long-term stability of large-span caverns is a challenging issue for design and construction of underground rock engineering. The Heidong cavern group consisting of 21 caverns was constructed about 1400 years ago for quarrying in massive Cretaceous tuff. The cavern No. 5 of the Heidong cavern group is characterized by an unsupported span up to 92 m, with the overburden thickness of only 3–25 m. To analyze its long-term stability, a detailed investigation was conducted to obtain its geometry and rock mass characteristics, and to monitor surrounding rock displacements. Based on field survey and laboratory tests, numerical simulations were performed using the finite difference code FLAC3D. The analysis results revealed that for the long-term stability of the cavern No. 5, some major factors should be carefully considered, such as cavern excavation method in hard massive rocks, site investigation using trial pits, tools like short iron chisel and hammer for manual excavation, geometric dome roof, and waste rocks within abutment or on the floor. The highlights of the technologies obtained from this large-scale ancient underground project can provide reference for other similar project excavations in practice. |
| first_indexed | 2024-12-16T11:04:36Z |
| format | Article |
| id | doaj.art-d35642515a734347b3997749529326b2 |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-12-16T11:04:36Z |
| publishDate | 2017-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-d35642515a734347b3997749529326b22022-12-21T22:33:53ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552017-04-019235036310.1016/j.jrmge.2016.12.004Back analysis of long-term stability of a 92 m span ancient quarrying cavernYanjun Shang0Lihui Li1Wantong He2Luqing Zhang3Tianbin Li4Zhifa Yang5Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, ChinaLong-term stability of large-span caverns is a challenging issue for design and construction of underground rock engineering. The Heidong cavern group consisting of 21 caverns was constructed about 1400 years ago for quarrying in massive Cretaceous tuff. The cavern No. 5 of the Heidong cavern group is characterized by an unsupported span up to 92 m, with the overburden thickness of only 3–25 m. To analyze its long-term stability, a detailed investigation was conducted to obtain its geometry and rock mass characteristics, and to monitor surrounding rock displacements. Based on field survey and laboratory tests, numerical simulations were performed using the finite difference code FLAC3D. The analysis results revealed that for the long-term stability of the cavern No. 5, some major factors should be carefully considered, such as cavern excavation method in hard massive rocks, site investigation using trial pits, tools like short iron chisel and hammer for manual excavation, geometric dome roof, and waste rocks within abutment or on the floor. The highlights of the technologies obtained from this large-scale ancient underground project can provide reference for other similar project excavations in practice.http://www.sciencedirect.com/science/article/pii/S1674775517300781Cretaceous tuffHeidong quarryLargest spanLong-term stabilityManual excavation |
| spellingShingle | Yanjun Shang Lihui Li Wantong He Luqing Zhang Tianbin Li Zhifa Yang Back analysis of long-term stability of a 92 m span ancient quarrying cavern Journal of Rock Mechanics and Geotechnical Engineering Cretaceous tuff Heidong quarry Largest span Long-term stability Manual excavation |
| title | Back analysis of long-term stability of a 92 m span ancient quarrying cavern |
| title_full | Back analysis of long-term stability of a 92 m span ancient quarrying cavern |
| title_fullStr | Back analysis of long-term stability of a 92 m span ancient quarrying cavern |
| title_full_unstemmed | Back analysis of long-term stability of a 92 m span ancient quarrying cavern |
| title_short | Back analysis of long-term stability of a 92 m span ancient quarrying cavern |
| title_sort | back analysis of long term stability of a 92 m span ancient quarrying cavern |
| topic | Cretaceous tuff Heidong quarry Largest span Long-term stability Manual excavation |
| url | http://www.sciencedirect.com/science/article/pii/S1674775517300781 |
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