TBMゲ-ジカッタに作用する切削抵抗の抑制方法について--ディスクカッタによる岩石切削に関する研究-4-

概要

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The laboratory experiments of TBM gauge cutters were carried out by using a linear rock cutting rig and a commercially available disc cutter. In the experiments two parameters were controlled principally to realize the configuration of gauge cutters: one is the angle of the disc plane against the axis of machine thrust α, and the other is the dip angle of the rock surface β. The experimental results provided some empirical formulae for predicting tool forces needed for gauge cutters to penetrate a rated depth. The formulae show that the tool force for gauge cutters would be intensified unless the plunge angle of the disc relative to the rock surface, α-β, remains positive. But also the formulae suggest that the tool force for gauge cutters could be restricted to that for face cutters when the relative plunge angle approaches to zero. Thus the formulae determined from the present investigation provide us a rational design criterion for alleviating tool force needed for TBM gauge cutters and prolonging their operational life-spans.
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