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This study is technology research to make the mechanical cutting process more efficient and sustainable in tunnelling by using lower forces and energies due to the rock fatigue effect using cyclic loading. This fatigue-based technology research was done at the University of Queensland, Australia for the first time in literature. Comparative experiments between the dynamic cutting tests using the Dynamic Cutting Discs (DCD) fatigue technology and the traditional (non-oscillating) hard rock cutting process are determined as the main objective of this research. When the DCD rock cutting test results are compared with the TBM disc test results working with the vibration-free conventional discs, the cutting forces, and the Specific Energy (SE) were found to decrease by 30% with the increased amount of excavated material by 200%. The cutting test results showed that the average normal force FN was attained approximately to be 43 kN at 3 mm vertical distance of cut and 54 kN at 5 mm vertical distance of cut for vibration-free conventional cutting. It was attained in particular that the magnitude of the average normal force FN decreased more than the average cutting force FR when the disc vibrated at 45 Hz. It was concluded that the cutting forces decreased significantly as the cyclic loading frequency increased. In conclusion, it is believed that this high energy saving rate obtained from the research results will be sustainable in scientific, economic, commercial, and social areas.
Keywords:
DCD dynamic rock cutting technology, tunnelling, and rock fatigue, TBMs and energy efficiency, oscillating disc cutters and TBMs, sustainability and tunnel boring
Cite Article:
"A new technology for the tunneling machinery; Part I: Decreasing cutting forces due to rock fatigue ", International Journal of Science & Engineering Development Research (www.ijrti.org), ISSN:2455-2631, Vol.7, Issue 10, page no.525 - 532, October-2022, Available :http://www.ijrti.org/papers/IJRTI2210070.pdf
Downloads:
000205036
ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator