Numerical Simulation and Regression-Based Prediction of Rotary Disc Cutter Forces in TBM Rock Cutting

Authors

  • Ebrahim Farrokh Amirkabir University of Technology
  • Hamid Rokhy Amirkabir University of Technology
  • Davood Lotfi R&D division of Tunnel Saz Machine Co.

DOI:

https://doi.org/10.17794/rgn.2026.4.3

Keywords:

Rotary disc cutting, SPG, RHT, Cutter force prediction, Regression-based modeling

Abstract

This study introduces a computational framework for estimating disc cutter forces during rotary cutting in Tunnel Boring Machines (TBMs), combining LS‑DYNA with a Smoothed Particle Galerkin (SPG) approach and the Riedel–Hiermaier–Thoma (RHT) material model. A total of 58 simulations were performed to examine how cutter forces vary with radial installation position, rock strength, contact area, and cutter spacing. The results demonstrate that normal, rolling, and side forces increase with rock compressive strength and contact interface size, but decrease as the cutter’s installation radius grows. Regression analysis based on natural logarithmic transformations yielded predictive equations with high accuracy (R² = 0.80–0.91). Each fitted parameter is reported with its standard error and 95% confidence interval, ensuring transparency, reproducibility, and statistical robustness.

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Published

2026-05-05

Issue

Vol. 41 No. 4 (2026): Forthcoming Issue: No. 80

Section

Mining

License

Copyright (c) 2026 Ebrahim Farrokh, Hamid Rokhy, Davood Lotfi

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How to Cite

Farrokh, E., Rokhy, H., & Lotfi, D. (2026). Numerical Simulation and Regression-Based Prediction of Rotary Disc Cutter Forces in TBM Rock Cutting. Rudarsko-geološko-Naftni Zbornik, 41(4), Article in Press . https://doi.org/10.17794/rgn.2026.4.3