Numerical Simulation of the Rock Fragmentation Process Induced by TBM Cutters

Abstract:

The rock fragmentation process is the interaction process between TBM and rock mass, which is affected by TBM specifications, such as thrust force, cutter tip width and profile, cutter spacing, RPM, and torque, and rock mass properties mainly including rock material strength, rock brittleness, joint spacing and orientation. In this study, based on the systematic study of the existed rock constitutive model achievements and introduction of rock breaking mechanism, main failure mode of rock in the breaking process of disc cutter is added and revised in order to meet the actual situation. The method of establishing numerical model of disc cutter breaking process is introduced. After the dynamic simulation, we can obtain that geotechnical interface disturbance insulted by disc cutter. Based on plenty of experiments, it confirms reliability of numerical methods and provides a method to study cutting performance for different geological conditions.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 1069-1072
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.1069
• Online since: December 2012
• Authors: Gang Li, Bo Wang, Ya Dong Chen, Wan Shan Wang
• Keywords: Disc Cutter, Numerical Simulation, Numerical Simulation Model, Rock Fragmentation, Tunnel Boring Machine

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