A Novel Mobile Testing Equipment for Rock Cuttability Assessment: Vertical Rock Cutting Rig (VRCR)

Abstract

In this study, a new mobile rock cutting testing apparatus was designed and produced for rock cuttability assessment called vertical rock cutting rig (VRCR) which was designed specially to fit into hydraulic press testing equipment which are available in almost every rock mechanics laboratory. Rock cutting trials were initiated just after the production of VRCR along with calibration of the measuring load cell with an external load cell to validate the recorded force data. Then, controlled rock cutting tests with both relieved and unrelieved cutting modes were implemented on five different volcanic rock samples with a standard simple-shaped wedge tool. Additionally, core cutting test which is an important approach for roadheader performance prediction was simulated with VRCR. Mini disc cutters and point attack tools were used for execution of experimental trials. Results clearly showed that rock cutting tests were successfully realized and measuring system is delicate to rock strength, cutting depth and other variables. Core cutting test was successfully simulated, and it was also shown that rock cutting tests with mini disc cutters and point attack tools are also successful with VRCR.

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Acknowledgements

This study is a part of the PhD thesis of Serdar Yasar. This work was carried out under the support of Scientific Research Projects Unit of Karadeniz Technical University (project code FDK-2015-5382), and authors are very grateful for the support. Additionally, authors would like to thank to Prof. Dr. Nuh Bilgin, Prof. Dr. Hanifi Copur and Assoc. Prof. Dr. Deniz Tumac for their generous helps during rock cutting tests with small-scale rock cutting test in Istanbul Technical University.

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Yasar, S., Yilmaz, A.O. A Novel Mobile Testing Equipment for Rock Cuttability Assessment: Vertical Rock Cutting Rig (VRCR). Rock Mech Rock Eng 50, 857–869 (2017). https://doi.org/10.1007/s00603-016-1149-z

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Keywords

  • Rock cutting mechanics
  • Mechanical excavation
  • Rock cutting tests
  • Core cutting test
  • Vertical rock cutting rig (VRCR)
  • Specific energy
  • Cutting force