Fundamental Study on Rock Cutting by an Actuated Undercutting Disc

Hoyoung Jeong; Yudhidya Wicaksana; Sehun Kim; Seokwon Jeon

doi:10.7474/TUS.2020.30.6.591

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2020 Vol.30, Issue 6 Preview Page

Original Article

Fundamental Study on Rock Cutting by an Actuated Undercutting Disc 구동형 언더커팅 디스크에 의한 암석절삭에 관한 기초연구

31 December 2020. pp. 591-602

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Abstract

Several alternative rock-cutting concepts, which are modified from the conventional ones, have been developed lately. Of the concepts, undercutting is one of the latest technologies. In this study, as a fundamental study on the undercutting technique, the rock-cutting mechanism and important parameters of the undercutting were introduced. This study built up cutting test system for evaluating the cutting performance of an actuated undercutting disc cutter (ADC), and carried out a series of cutting tests under different cutting parameters of ADC. The characteristics of cutter forces obtained from ADC rock-cutting tests were analyzed. The both average and peak values of the three directional cutter forces were linearly increased with the increases of linear velocity, penetration depth in vertical direction and eccentricity of ADC.

Keywords

Undercutting

Actuated undercutting

Cutting mechanism

Cutter force

기존의 전통적인 암석절삭방식의 한계점을 극복하고자 다양한 신개념의 암석절삭메커니즘이 연구되고 있으며, 그 중 언더커팅은 최근 연구가 수행되고 있는 기술이다. 본 논문에서는 언더커팅에 대한 기초연구로서 구동형 언더커팅에 의한 암석절삭메커니즘과 절삭에 관여하는 중요핵심변수들에 대하여 소개하였다. 구동형 언더커팅에 의한 절삭성능을 평가하기 위한 시험시스템을 구축하고 이를 활용하여 주요 핵심변수들을 변화시켜가며 구동형 언더커팅 디스크를 활용한 절삭시험을 수행하였다. 구동형 언더커팅 절삭시험으로부터 획득되는 3방향 커터작용력의 특성을 분석하였으며, ADC의 주요 절삭변수인 선형이동속도, 법선압입깊이, 편심의 증가에 따라 3방향 커터작용력의 평균값과 최댓값은 모두 선형적으로 증가하는 결과를 나타내었다.

키워드

언더커팅

구동형 언더커팅

절삭 메커니즘

커터작용력

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Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 30
No :6
Pages :591-602
Received Date : 2020-12-15
Revised Date : 2020-12-17
Accepted Date : 2020-12-21
DOI :https://doi.org/10.7474/TUS.2020.30.6.591

Tunnel and Underground Space ISSN:1225-1275(Print) 2287-1748(Online) 터널과 지하공간

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