Theoretical Study on Three-dimensional Rock Breaking of Tunnel Boring Machine

doi:10.3901/JME.2024.11.332

Abstract

Abstract: The disc hob rock breaking theory research of tunnel boring machine has been one of the hotspots in the related fields, but the research content and research method are mostly based on the experiment of linear rolling rock breaking with disc hob, while the actual operation of the tunnel boring machine disc hob is a circular rolling rock crushing, that is, the three-dimensional rolling rock breaking. Accordingly, a three-dimensional disc hob have been designed and the finite element model of three-dimensional disc hob circular rolling rock breaking by ABAQUS software. Through the analysis and calculation of the disc hob rock breaking force and the rock-breaking specific energy on different disc hob spacing, the study of the three-dimensional optimal disc hob spacing of three-dimensional dis hob under different penetration is investigated. The formula for determining the optimal disc hob spacing of the three-dimensional disc hob is proposed and established by fitting analysis with Origin software. The three-dimensional disc hob and the three-dimensional optimal cutter spacing theory are applied to a TBM cutter and compared with the main parameters of original cutter, and it is found that: the cutter with three-dimensional disc hob and three-dimensional cutter spacing reduces 15.8% of thrust and 22.05% of torque compared with the original cutter. The thesis research proved that the theory of three-dimensional disc hob and three-dimensional cutter spacing arrangement can effectively improve the rock-breaking efficiency of TBM.

Key words: tunnel boring machine, three-dimensional disc hob, three-dimensional disc hob spacing, main parameters, finite element calculation

CLC Number:

U455

ZHANG Zhaohuang, CHENG Kefeng, LIU Shubing. Theoretical Study on Three-dimensional Rock Breaking of Tunnel Boring Machine[J]. Journal of Mechanical Engineering, 2024, 60(11): 332-341.

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