@inproceedings{ebdbb539ee2d4ec6b340c7c37b2ce36f,
title = "Forensic study on tunnel collapse in deep and fractured rock",
abstract = "A tunnel collapse occurred in a deep fractured rock. The cover depth of the tunnel was over 70m, and its height and width were 7.7m and 11.6m, respectively. The length of tunnel collapse was 14m and total volume of rock fragments flowed into the tunnel was about 600m3. To identify the failure mechanism, detailed investigation including additional rock drilling, theoretical review and numerical back analysis were performed. Vertical and horizontal drilling revealed that the rock was severely fractured with faults, and the area of rock fall developed to the distance of 14.4m from the tunnel crown. It was revealed that the blast excavation disturbed the rock mass and triggered raveling of rock fragments, and finally caused mass rock fall. Measures reinforcing the ground around the tunnel and further excavation method and procedure were proposed.",
author = "Kim, {K. H.} and Jeong, {J. H.} and Shin, {J. H.} and Kim, {S. H.} and Jeong, {S. S.}",
year = "2019",
month = jan,
day = "1",
doi = "10.1201/9780429424441-97",
language = "English",
isbn = "9781138388659",
series = "Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress",
publisher = "CRC Press/Balkema",
pages = "909--917",
editor = "Daniele Peila and Giulia Viggiani and Giulia Viggiani and Tarcisio Celestino",
booktitle = "Tunnels and Underground Cities",
note = "World Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019 ; Conference date: 03-05-2019 Through 09-05-2019",
}