A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model
This paper analyses the construction time and advance rate of a 3 km long drill and blast tunnel under various geological conditions using an upgraded NTNU drill and blast prediction model. The analysis was carried out for the five types of Korean tunnel supports according to the rock mass quality (...
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MDPI AG
2021-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/21/10096 |
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| author | Yangkyun Kim Sean Seungwon Lee |
| author_facet | Yangkyun Kim Sean Seungwon Lee |
| author_sort | Yangkyun Kim |
| collection | DOAJ |
| description | This paper analyses the construction time and advance rate of a 3 km long drill and blast tunnel under various geological conditions using an upgraded NTNU drill and blast prediction model. The analysis was carried out for the five types of Korean tunnel supports according to the rock mass quality (from Type 1, meaning a very good rock mass quality; to Type 5, meaning a very poor rock mass quality). Four kinds of rock properties, as well as the rock mass quality, for each tunnel support type were applied to simulate different geological conditions based on previous studies and the NTNU model. The construction time was classified into five categories: basic, standard, gross, tunnel and total, according to the operation characteristics to more effectively analyse the time. In addition, to consider the actual geological conditions in tunnelling, the construction times for the three mixed geological cases were analysed. It was found that total construction time of a tunnel covering all the operations and site preparations with a very poor rock mass quality was more than twice that of a tunnel with a very good rock mass quality for the same tunnel length. It is thought that this study can be a useful approach to estimating the construction time and advance rate in the planning or design stage of a drill and blast tunnel. |
| first_indexed | 2024-03-10T06:06:10Z |
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| id | doaj.art-070ac50b2fae448ea81c0ee9371e0aea |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T06:06:10Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-070ac50b2fae448ea81c0ee9371e0aea2023-11-22T20:27:43ZengMDPI AGApplied Sciences2076-34172021-10-0111211009610.3390/app112110096A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction ModelYangkyun Kim0Sean Seungwon Lee1Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, KoreaDepartment of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, KoreaThis paper analyses the construction time and advance rate of a 3 km long drill and blast tunnel under various geological conditions using an upgraded NTNU drill and blast prediction model. The analysis was carried out for the five types of Korean tunnel supports according to the rock mass quality (from Type 1, meaning a very good rock mass quality; to Type 5, meaning a very poor rock mass quality). Four kinds of rock properties, as well as the rock mass quality, for each tunnel support type were applied to simulate different geological conditions based on previous studies and the NTNU model. The construction time was classified into five categories: basic, standard, gross, tunnel and total, according to the operation characteristics to more effectively analyse the time. In addition, to consider the actual geological conditions in tunnelling, the construction times for the three mixed geological cases were analysed. It was found that total construction time of a tunnel covering all the operations and site preparations with a very poor rock mass quality was more than twice that of a tunnel with a very good rock mass quality for the same tunnel length. It is thought that this study can be a useful approach to estimating the construction time and advance rate in the planning or design stage of a drill and blast tunnel.https://www.mdpi.com/2076-3417/11/21/10096construction timeadvance rateNTNU drill and blast modeltunnel supportequivalent rock mass quality |
| spellingShingle | Yangkyun Kim Sean Seungwon Lee A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model Applied Sciences construction time advance rate NTNU drill and blast model tunnel support equivalent rock mass quality |
| title | A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model |
| title_full | A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model |
| title_fullStr | A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model |
| title_full_unstemmed | A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model |
| title_short | A Study of the Effects of Geological Conditions on Korean Tunnel Construction Time Using the Updated NTNU Drill and Blast Prediction Model |
| title_sort | study of the effects of geological conditions on korean tunnel construction time using the updated ntnu drill and blast prediction model |
| topic | construction time advance rate NTNU drill and blast model tunnel support equivalent rock mass quality |
| url | https://www.mdpi.com/2076-3417/11/21/10096 |
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