Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Three Dimensional Numerical Analysis on Rock Cutting Behavior of Disc Cutter Using Particle Flow Code

3차원 입자결합모델을 이용한 디스크 커터의 암석절삭에 관한 연구

  • Lee, Seung-Joong (Dept. of Energy & Resource Engineering, Kangwon National University) ;
  • Choi, Sung-Oong (Dept. of Energy & Resource Engineering, Kangwon National University)
  • 이승중 (강원대학교 공과대학 에너지.자원공학과) ;
  • 최성웅 (강원대학교 공과대학 에너지.자원공학과)
  • Received : 2013.01.10
  • Accepted : 2013.01.29
  • Published : 2013.02.28
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Abstract

The LCM (Linear Cutting Machine) test is one of the most powerful and reliable methods for designing the disc cutter and for predicting the TBM (Tunnel Boring Machine) performance. It has an advantage to predict the actual load on disc cutter from the laboratory test on the real-size large rock samples, however, it also has a disadvantage to transport and/or prepare the large rock samples and to need an extra cost for experiment. In order to overcome this problem, lots of numerical studies have been performed. In this study, the PFC3D (Particle Flow Code in 3 Dimension) has been adopted for numerical analysis on optimum cutter spacing and failure aspects of Busan Tuff. The optimum cutting condition with s/p ratio of 16 and minimum specific energy of $14MJ/m^3$ was derived from numerical analyses. The cutter spacing for Busan Tuff had the good agreements with those of LCM test and numerical analysis by finite element method.

선형절삭시험(Linear Cutting Machine)은 TBM(Tunnel Boring Machine)에서의 디스크 커터 설계와 굴진성능 예측을 위한 가장 신뢰성 있는 시험 중의 하나로서, 실대형 암석시료를 대상으로 실제의 커터 하중을 예측할 수 있는 장점을 갖고 있지만, 시료의 채취 및 운반이 용이하지 않고, 1회 시험에 많은 비용이 소요되는 단점을 갖고 있다. 최근 선형절삭시험이 갖는 이러한 경제적 시간적 제약점들을 극복할 수 있는 현실성 있는 수치모델의 개발에 관한 연구가 활발히 진행되고 있다. 본 연구에서는 3차원 입자결합모델을 이용하여 디스크 커터의 절삭에 의한 부산 응회암의 파쇄양상과 최적 커터간격을 도출하였다. 본 해석에서 분석된 비에너지는 $14.3MJ/m^3$ 일 때 최소값을 나타냈다. 이때의 최적의 s/p 비는 약 16 으로 분석되었으며, 부산응회암의 선형절삭시험 및 유한요소법에 의한 수치해석 연구결과와 유사한 경향을 나타냈다.

Keywords

References

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Cited by

  1. A numerical study on rock cutting by a TBM disc cutter using SPH code vol.15, pp.3, 2013, https://doi.org/10.9711/KTAJ.2013.15.3.345