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Recent Swedish Studies on the Extent of Blast Damage after Excavation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering. Swedish Nuclear Fuel and Waste Management Company (SKB).
Swedish Transport Administration (TRV).
Swedish Nuclear Fuel and Waste Management Company (SKB).
EDZ Consulting AB.
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2016 (English)Conference paper, Presentation (Refereed)
Abstract [en]

This paper presents two recent studies on the extent of blast damage after excavation in crystalline rock. The Swedish Transport Administration and the Swedish Nuclear Fuel and Waste Management Company (SKB) are both under regulations to limit excavation damage during construction of tunnels. SKB is also required to limit the Excavation Damage Zone (EDZ), as this could be a potential flow path for radionuclides in the planned repository for spent nuclear fuel.Presented in this paper are investigations of blast damage from three tunnel sites, a road tunnel, an experimental tunnel in Äspö Hard Rock Laboratory and an underground subway depot.As expected the fractures resulting from the bottom charge are both longer and more frequent then those mapped in the column charge. The results show that the requirement to limit blast damage according to Swedish regulations was fulfilled for the column charge at the three studied sites.

Place, publisher, year, edition, pages
Research subject
Mining and Rock Engineering
URN: urn:nbn:se:ltu:diva-39564Local ID: e60f1a29-4bed-4969-b2d3-a702d938deb5OAI: diva2:1013078
World Tunnel Congress : 22/04/2016 - 28/04/2016
Godkänd; 2016; 20160513 (henitt)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Ittner, HenrikJohansson, Daniel
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