Assessment of rock cutting efficiency of an actuated undercutting disc

Hoyoung Jeong; Wicaksana Yudhidya; Sehun Kim; Seokwon Jeon

doi:10.9711/KTAJ.2021.23.3.199

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2021 Vol.23, Issue 3 Preview Page

Research Paper

Assessment of rock cutting efficiency of an actuated undercutting disc 구동형 언더커팅 디스크의 절삭효율 평가

31 May 2021. pp. 199-209

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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

TBM과 로드헤더로 대표되는 기존의 기계화 암반굴착방식을 보완하고 대체하기 위한 새로운 개념의 암석절삭기법들이 연구되어오고 있다. 이러한 기법들 중 언더커팅 방식은 최근에 연구가 수행되고 있는 방식이다. 언더커팅에서는 기존의 전통적인 암석절삭 방식과 비교하여 보다 많은 절삭변수들이 암석의 절삭메커니즘에 관여한다. 본 논문은 이에 대한 기초연구로 수행되었으며, 언더커팅이 적용된 구동형 디스크, 실험실 스케일의 절삭시험시스템, 시험 방법에 대하여 소개하였다. 또한 본 논문에서 소개된 절삭시험시스템을 이용하여 구동형 언더커팅 디스크의 절삭력을 통해 비에너지를 계산하는 방법을 소개하였으며, 그 결과를 전통적인 암석절삭방식과 비교하여 분석하였다.

키워드

언더커팅

구동형 디스크 커팅

비에너지

절삭성능

References

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 23
No :3
Pages :199-209
Received Date : 2021-04-24
Revised Date : 2021-05-17
Accepted Date : 2021-05-20
DOI :https://doi.org/10.9711/KTAJ.2021.23.3.199

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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