Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method
The surrounding rock stability of an underground cavern group is an important issue in the process of cavern excavation, which has the characteristics of large displacement, discontinuity and uneven deformation, so the calculation and analysis are very complicated. The optimized discontinuous deform...
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MDPI AG
2023-02-01
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| Series: | Applied Sciences |
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| author | Hai-Ping Ma Nik Norsyahariati Nik Daud Zainuddin Md Yusof Wan Zuhairi Yaacob Hu-Jun He |
| author_facet | Hai-Ping Ma Nik Norsyahariati Nik Daud Zainuddin Md Yusof Wan Zuhairi Yaacob Hu-Jun He |
| author_sort | Hai-Ping Ma |
| collection | DOAJ |
| description | The surrounding rock stability of an underground cavern group is an important issue in the process of cavern excavation, which has the characteristics of large displacement, discontinuity and uneven deformation, so the calculation and analysis are very complicated. The optimized discontinuous deformation analysis for rock failure method was adopted to analyze the stability of the surrounding rock of a real underground engineering cavern group under different excavation schemes. The cracking process of surrounding rock under different excavation schemes, the depth of crack expansion and the vertical displacement of the arch and bottom floor were obtained, and the following conclusions are drawn: (a) After the completion of the excavation, the stability problems mainly appeared in the surrounding rocks of the arch, left wall, right wall and bottom floor of the main powerhouse, in the surrounding rocks of the arch, left wall and bottom floor of the main transformer chamber and in the surrounding rocks of the arch, right wall and bottom floor of the tailrace surge tank. (b) Fault f2 has an influence on the stability of the surrounding rock of the tailrace surge tank, while fault f1 has no influence on the stability of the cave group. (c) The scheme of simultaneous excavation of three caverns shows the advantages in the crack propagation depth of surrounding rock and vertical displacements of caverns. |
| first_indexed | 2024-03-11T09:13:02Z |
| format | Article |
| id | doaj.art-68e7c147161543759f0506a437df06d2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:13:02Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-68e7c147161543759f0506a437df06d22023-11-16T18:51:39ZengMDPI AGApplied Sciences2076-34172023-02-01134215210.3390/app13042152Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF MethodHai-Ping Ma0Nik Norsyahariati Nik Daud1Zainuddin Md Yusof2Wan Zuhairi Yaacob3Hu-Jun He4Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, MalaysiaDepartment of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, MalaysiaDepartment of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, MalaysiaDepartment of Earth Science and Environmental, Faculty of Science Technology, Universiti Kebangsaan, Bangi 43600, MalaysiaSchool of Civil and Architecture Engineering, Panzhihua University, No. 10, North Section of Sanxiandadao Road, Dong District, Panzhihua 617000, ChinaThe surrounding rock stability of an underground cavern group is an important issue in the process of cavern excavation, which has the characteristics of large displacement, discontinuity and uneven deformation, so the calculation and analysis are very complicated. The optimized discontinuous deformation analysis for rock failure method was adopted to analyze the stability of the surrounding rock of a real underground engineering cavern group under different excavation schemes. The cracking process of surrounding rock under different excavation schemes, the depth of crack expansion and the vertical displacement of the arch and bottom floor were obtained, and the following conclusions are drawn: (a) After the completion of the excavation, the stability problems mainly appeared in the surrounding rocks of the arch, left wall, right wall and bottom floor of the main powerhouse, in the surrounding rocks of the arch, left wall and bottom floor of the main transformer chamber and in the surrounding rocks of the arch, right wall and bottom floor of the tailrace surge tank. (b) Fault f2 has an influence on the stability of the surrounding rock of the tailrace surge tank, while fault f1 has no influence on the stability of the cave group. (c) The scheme of simultaneous excavation of three caverns shows the advantages in the crack propagation depth of surrounding rock and vertical displacements of caverns.https://www.mdpi.com/2076-3417/13/4/2152stability analysis of surrounding rockoptimized DDARFunderground cavern groupexcavation scheme |
| spellingShingle | Hai-Ping Ma Nik Norsyahariati Nik Daud Zainuddin Md Yusof Wan Zuhairi Yaacob Hu-Jun He Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method Applied Sciences stability analysis of surrounding rock optimized DDARF underground cavern group excavation scheme |
| title | Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method |
| title_full | Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method |
| title_fullStr | Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method |
| title_full_unstemmed | Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method |
| title_short | Stability Analysis of Surrounding Rock of an Underground Cavern Group and Excavation Scheme Optimization: Based on an Optimized DDARF Method |
| title_sort | stability analysis of surrounding rock of an underground cavern group and excavation scheme optimization based on an optimized ddarf method |
| topic | stability analysis of surrounding rock optimized DDARF underground cavern group excavation scheme |
| url | https://www.mdpi.com/2076-3417/13/4/2152 |
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