Comptes Rendus
no. 9
Experimental investigation of jointed rock breaking under a disc cutter with different confining stresses
Qibin Lin1  ; Ping Cao1  ; Rihong Cao1, 2
1 School of Resources and Safety Engineering, Central South University, Changsha, China
2 School of Civil, Environmental and Mining Engineering, The University of Western Australia, Perth, Australia
Comptes Rendus. Mécanique, Volume 346 (2018) no. 9, pp. 833-843.

Extensive and detailed investigations have been made to better understand the rock-breaking mechanism of the tunnel boring machine (TBM) disc cutter, but the crack propagation and failure modes induced by the disc cutter when the confining stresses and joint characteristics vary have not been comprehensively investigated. To address this area of research, a triaxial testing machine (TRW-3000) is modified to investigate the effect of different confining stresses (0, 2.5, 5, 7.5 and 10 MPa) on the rock breaking of different joint angles (0°, 30°, 60°, and 90°) induced by the disc cutter. In this series of tests, the crack propagation and failure modes of the intact and jointed rock with different confining stresses are analysed. During the experiments, four different types of failure modes have been observed. The failure mode is affected by the joint orientation at low confining stress. The existence of joints has no obvious effect on the failure mode when the confining stress increases to a certain extent.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2018.06.012
Mots clés : TBM disc cutter, Jointed rock mass, Confining stress, Crack propagation, Failure mode
Qibin Lin 1 ; Ping Cao 1 ; Rihong Cao 1, 2

1 School of Resources and Safety Engineering, Central South University, Changsha, China
2 School of Civil, Environmental and Mining Engineering, The University of Western Australia, Perth, Australia 
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Qibin Lin; Ping Cao; Rihong Cao. Experimental investigation of jointed rock breaking under a disc cutter with different confining stresses. Comptes Rendus. Mécanique, Volume 346 (2018) no. 9, pp. 833-843. doi : 10.1016/j.crme.2018.06.012. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2018.06.012/

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