A rock mass rating system for predicting TBM utilization

S. Yagiz, T. Kim, O. Frough, S. R. Torabi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Prediction of utilization based on rock mass properties is critical for any mechanized tunneling project, since the utilization have an influence on duration and costs of project. Using some case studies including Queens, Milyang, Manapouri, Karaj, Varzo, Maen, Pieve mechanized tunneling project around the world, the attempt is made to estimate utilization via Rock Mass Rating (RMR) System herein. It is concluded that the machine utilization has some reasonable correlations with RMR; however, this relationship is depend on not only rock mass properties but also machine specifications. In other words, the utilization may change with both rock mass conditions and utilized machine type. Due to that rock properties and other related downtimes should be examined together to obtain the reliable equations for predicting the utilization. Further, developed relationships may be used for similar rock type to estimate utilization from RMR.

Original languageEnglish
Title of host publicationISRM International Symposium - EUROCK 2013
Editors Lydzba, Kwasniewski
PublisherInternational Society for Rock Mechanics
Number of pages5
ISBN (Print)9781138000803
Publication statusPublished - Oct 2013
Externally publishedYes
EventISRM International Symposium - EUROCK 2013 - Wroclaw, Poland
Duration: Oct 23 2013Oct 26 2013

Publication series

NameISRM International Symposium - EUROCK 2013


ConferenceISRM International Symposium - EUROCK 2013

ASJC Scopus subject areas

  • Geochemistry and Petrology

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