Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Blast-induced damaged zone studies: Final Report to Trafikverket
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0001-8001-9745
2011 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

This report is a summary and conclusions from the study on Blast-Induced Damage around underground excavations in hard rock, which was carried out as a PhD research project by the author. The project was funded by Vägverket and the research was conducted at the Division of Mining and Geotechnical Engineering at Luleå University of Technology. The work resulted in several publications; a PhD thesis, journal articles, conference articles and technical reports. The publications can be downloaded from: http://www.ltu.se/staff/d/davsai?l=en. This final report is compilation of the important elements from these various publications.Because the Blast-Induced Damaged Zone (BIDZ) is generally perceived to have a negative impact on the economics and performance of a tunnel many studies have been conducted to delineate the extent of the BIDZ. The primary goal has been to device ways to control or minimise the extent of this zone. As a result guidelines have been developed by concerned authorities, such as for example AnläggningAMA-98 (1999), to control the extent of BIDZ during tunnel construction. These guidelines however do not give recommendations about the strength and stiffness properties of the BIDZ, which are the most important parameters that control its behaviour and ultimately influence the stability and performance of tunnel.The extent of the BIDZ in majority of the practical cases varied between 0.1 and 1.0 m, with an average ranging from 0.3 m to 0.5 m. The stiffness magnitudes of this zone were as low as 10% to as high as 90% of that of the undamaged rock mass. Field investigation at Kiirunavaara underground mine (Malmgren et al, 2007) showed the stiffness of the BIDZ to vary between 50 and 90% of that of the undamaged rock mass, while the thickness ranged from 0.5 to 1.0 m. Although it was possible to deduce the modulus of the BIDZ the strength however, is the most difficult to measure or estimate. The most generic way to estimate the strength of the BIDZ is the use of a rock mass classification system in conjunction with a strength criteria, which was the approach used in the research by this author.Numerical studies of the BIDZ by this author showed that, the presence of this zone does affect the overall response of the near-field rock mass. This therefore implies the need for consideration of this zone during the tunnel design stage. The strength and stiffness of this zone were also found to affect the type of failure around the tunnel and its extent. However, it not is possible to state by what degree the BIDZ will affect the performance of a tunnel as it is relative. It is therefore wise to use guidelines to minimise damage even though it may be costly and unnecessary. In any case it would be beneficial to consider the sensitivity of an excavation, both subjectively and objectively, before emphasising the seriousness to stick to the blast damage guidelines.

sted, utgiver, år, opplag, sider
Luleå: Luleå tekniska universitet, 2011. , s. 193
Serie
Teknisk rapport / Luleå tekniska universitet, ISSN 1402-1536
HSV kategori
Forskningsprogram
Gruv- och Berganläggningsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-24984Lokal ID: d526e4f8-a94c-4073-afda-419eb3ebc3b5ISBN: 978-91-7439-222-7 (tryckt)OAI: oai:DiVA.org:ltu-24984DiVA, id: diva2:998036
Merknad
Godkänd; 2011; 20110214 (davsai)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-04-16bibliografisk kontrollert

Open Access i DiVA

fulltekst(6429 kB)304 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 6429 kBChecksum SHA-512
30acc14daee0951d17abf84ec18f68b7d40aa82f9c7d57937c407c9555e008277b63c69f1f3626b8f0909d6cb473c929fe94079d41f3bf2f2f190528b7925411
Type fulltextMimetype application/pdf

Personposter BETA

Saiang, David

Søk i DiVA

Av forfatter/redaktør
Saiang, David
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 304 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

isbn
urn-nbn

Altmetric

isbn
urn-nbn
Totalt: 177 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf