Numerical simulation of influence of joint orientation on rock fragmentation process induced by a TBM cutter

Q. M. Gong, J. Zhao, H. Y. Bian

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

2 Citations (Scopus)

Abstract

Aseriesoftwo dimension numerical modeling were performed using the discrete element method (DEM) to explore the effect of joint orientation on rock fragmentation process by a tunnel boring machine (TBM) rolling cutter. Numerical results show that the joint orientation can significantly influence the crack initiation and propagation, as well as the fragmentation pattern, and hence affect the penetration rate of the TBM. Two crack initiation and propagation modes are found to break the rock mass due to the variation of joint orientation. One is that the cracks initiate form the joint plane and propagate upwards to the free surface. The other is that the cracks initiate form the crushed zone and propagate downwards to the joint plane. The results also show that the stress field is deflected in different extent due to the occurrence of joint and the variation of the joint orientation. It makes the chipping angle increase with the increase of the angle between the tunnel axis and joint plane.

Original languageEnglish
Title of host publicationImpact of Human Activity on the Geological Environment - Proceedings of the International Symposium of the International Society for Rock Mechanics, Eurock 2005
Pages173-178
Number of pages6
Publication statusPublished - 1 Dec 2005
Externally publishedYes
EventEuropean Rock Mechanics Symposium 2005 - Brno, Czech Republic
Duration: 18 May 200520 May 2005
https://www.onepetro.org/conferences/ISRM/EUROCK05 (Proceedings)

Publication series

NameImpact of Human Activity on the Geological Environment - Proceedings of the International Symposium of the International Society for Rock Mechanics, Eurock 2005

Conference

ConferenceEuropean Rock Mechanics Symposium 2005
Abbreviated titleEUROCK 2005
CountryCzech Republic
CityBrno
Period18/05/0520/05/05
Internet address

Cite this