Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Application of Measurement While Drilling Technology to Predict Rock Mass Quality and Rock Support for Tunnelling
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0003-1923-044x
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5165-4229
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-8001-9745
2019 (English)In: Rock Mechanics and Rock Engineering, ISSN 0723-2632, E-ISSN 1434-453XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

A tunnelling project is normally initiated with a site investigation to determine the in situ rock mass conditions and to generate the basis for the tunnel design and rock support. However, since site investigations often are based on limited information (surface mapping, geophysical profiles, few bore holes, etc.), the estimation of the rock mass conditions may contain inaccuracies, resulting in underestimating the required rock support. The study hypothesised that these inaccuracies could be reduced using Measurement While Drilling (MWD) technology to assist in the decision-making process. A case study of two tunnels in the Stockholm bypass found the rock mass quality was severely overestimated by the site investigation; more than 45% of the investigated sections had a lower rock mass quality than expected. MWD data were recorded in 25 m grout holes and 6 m blast holes. The MWD data were normalised so that the long grout holes with larger hole diameters and the shorter blast holes with smaller hole diameters gave similar results. With normalised MWD data, it was possible to mimic the tunnel contour mapping; results showed good correlation with mapped Q-value and installed rock support. MWD technology can improve the accuracy of forecasting the rock mass ahead of the face. It can bridge the information gap between the early, somewhat uncertain geotechnical site investigation and the geological mapping done after excavation to optimise rock support.

Place, publisher, year, edition, pages
Springer, 2019.
Keywords [en]
Measurement while drilling (MWD), Rock mass investigation, Tunnelling, Rock mass quality, Rock support, Drill and blast technology
National Category
Mineral and Mine Engineering Infrastructure Engineering Construction Management Geotechnical Engineering Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-76382DOI: 10.1007/s00603-019-01979-2ISI: 000489294700001OAI: oai:DiVA.org:ltu-76382DiVA, id: diva2:1360811
Funder
Rock Engineering Research Foundation (BeFo), 344Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-10-28

Open Access in DiVA

fulltext(1792 kB)19 downloads
File information
File name FULLTEXT01.pdfFile size 1792 kBChecksum SHA-512
f7f6ee11b631d0f58095458a8c7b3509a03db41ad631e9dc60a1f74a8d2bc747d476671d1fd9471e7c6211a5fd6c8c583b06246dd28b0cbf25c355fd7b93106b
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
van Eldert, JeroenSchunnesson, HåkanJohansson, DanielSaiang, David
By organisation
Mining and Geotechnical Engineering
In the same journal
Rock Mechanics and Rock Engineering
Mineral and Mine EngineeringInfrastructure EngineeringConstruction ManagementGeotechnical EngineeringOther Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 19 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 30 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf