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http://dx.doi.org/10.9711/KTAJ.2021.23.3.199

Assessment of rock cutting efficiency of an actuated undercutting disc  

Jeong, Hoyoung (Dept. of Energy Resources Engineering, Pukyong National University)
Wicaksana, Yudhidya (Dept. of Energy Resources Engineering, Seoul National University)
Kim, Sehun (Dept. of Energy Resources Engineering, Seoul National University)
Jeon, Seokwon (Dept. of Energy Resources Engineering, Seoul National University)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.23, no.3, 2021 , pp. 199-209 More about this Journal
Abstract
Alternative methods of rock cutting have been introduced to substitute and to improve the traditional mechanical rock excavation methods (e.g., TBM and roadheader). Undercutting methods have been recently studied in some countries. In undercutting, several additional cutting parameters are involved in its cutting process compared to the traditional rock-cutting. As a fundamental study, this paper introduces the concept of undercutting method with actuated disc, lab-scaled testing system, and testing procedures of undercutting by the system. Also, we present the calculation methods of cutter forces and specific energy, and discuss the results of undercutting tests compared to those of traditional rock-cutting methods.
Keywords
Undercutting; Actuated disc cutting (ADC); Specific energy; Cutting performance;
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