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Numerical Analysis on Fragmentation Mechanism by Indentation of Disc Cutter in a Rock Specimen with a Single Joint  

Lee, Seung-Joong (강원대학교 공과대학 지구시스템공학과)
Choi, Sung-O. (강원대학교 공과대학 지구시스템공학과)
Publication Information
Tunnel and Underground Space / v.19, no.5, 2009 , pp. 440-449 More about this Journal
Abstract
LCM test is one of the most powerful and reliable methods of experiment for the cutter head design and the performance prediction of TBM. In many cases, however, the predicted design model can be directly applied to the field design, because this test may have an uppermost limit in preparation and/or transportation of the large size rock samples and the test for the jointed rock mass is not easy. When the proper and reasonable numerical modeling is considered to overcome this limit, the most adequate cutter head design for TBM could be presented without any complicate preconsideration in the field. In this study, the crack propagation patterns dependent on the contact point of disc cutter and the angle of rock joint are analyzed for the rock specimen with a single joint using the UDEC. The authors could derive the appropriate contact points of disc cutters and their space with respect to the joint angle in rock mass thru the numerical analysis.
Keywords
LCM test; Disc cutter; Jointed rock mass; Crack propagation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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