Despite several decades of academic rock mechanics and practical rock engineering there is still a lack of some fundamental knowledge on rock-tool interaction. A model is considered in this paper that takes the constitutive law of the rock, the presence of the tunnel head, the discontinuities and the amount of the natural stress due to the high overburden in the presence of the forces caused by the TBM disk on the tunnel head, into account in the failure mode.
Tunnel boring machine (TBM) Tool-rock interaction TBM disk Rock failure
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