Rock Cutting Experiments with an Actuated Disc

Sevda Dehkhoda, Emmanuel Detournay

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper reports the results of actuated disc cutting (ADC) experiments, conducted with an instrumented tabletop ADC rig on a soft limestone. The experiments were designed to assess the predictions of an ADC model (Dehkhoda and Detournay in Rock Mech Rock Eng 50(2):465–483, 2016) and the validity of the assumptions on which the model is constructed, in particular the invariance of the specific energy on actuation. All the experiments were conducted at the same depth of cut, which was selected to ensure a brittle mode of failure, characterized by the formation of chips. By changing the disc size and actuation amplitude, as well as the actuation frequency and the cartridge velocity, the experiments covered a large enough range of the two numbers controlling the cutting response, to rigorously test the theoretical model and its assumptions. Analyses of the experimental data show in general good agreement with the theoretical predictions, in particular the decrease of the thrust force with increased actuation and the partitioning of the external power between actuation of the disc and translation of the cartridge. The experimental results do not show any significant dependence of the specific energy on actuation.

Original languageEnglish (US)
Pages (from-to)3443-3458
Number of pages16
JournalRock Mechanics and Rock Engineering
Volume52
Issue number9
DOIs
StatePublished - Sep 1 2019

Bibliographical note

Funding Information:
The authors would like to thank Rachel Xu and Bryce Hill for their assistance in conducting analyses, Greg Lupton and Stephen Banks for the design and commissioning of Wobble, and Minerals Research Institute of Western Australia, Mining3 and CSIRO for their support of the project.

Publisher Copyright:
© 2019, Springer-Verlag GmbH Austria, part of Springer Nature.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Cutter actuation
  • Cutter/rock interaction
  • Hard rock cutting
  • Mechanical excavation
  • Undercutting discs
  • Wobble

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