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2017 Vol.19, Issue 6 Preview Page
Numerical study on rock splitting using the cylindrical cavity

원형 자유면을 이용한 암반 파쇄의 수치해석적 연구

Sung Kwon Ahn1*
안 성권1*
1Senior Researcher, New Transportation Systems Research Center, Korea Railroad Research Institute
1정회원, 한국철도기술연구원 신교통연구본부 선임연구원
*교신저자. *Corresponding Author. 
30 November 2017. pp. 1013-1028
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Abstract

This paper presents key findings obtained from the numerical experiment investigating into the use of the cylindrical cavity for rock splitting operations. The stress and strain path analyses were carried out in order to provide a better insight into the crack formation. The principal stress analysis carried out along the crack line using the results obtained from these numerical analyses allowed the failure of the brittle material and the crack propagation to be investigated. This paper also suggested possible reasons for the change in crack direction observed during the rock splitting operations using the results obtained.

Keywords
Rock splitting operations
Free surface
Numerical analysis
Tunnel shaft

본 논문은 원형 자유면을 이용한 암반 파쇄에 대한 수치해석적 연구이다. 암반 파쇄시 균열 발생에 대한 메커니즘을 알아보기 위하여 수치해석을 통해 응력 및 변형율 경로를 분석하였다. 수치해석 결과로부터 균열선의 주응력 분석으로 최대 주응력을 산출하여 취성 재료의 파괴와 균열 진전에 대하여 분석 규명하였다. 또한 본 연구결과를 통하여 암반파쇄시 균열 진전 방향이 전환되는 거동 메커니즘을 제시하였다

키워드
암반 파쇄(할암)
자유면
수치해석
터널 수직구
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 : 19
  • No :6
  • Pages :1013-1028
  • Received Date : 2017-10-20
  • Revised Date : 2017-11-07
  • Accepted Date : 2017-11-17
  • DOI :https://doi.org/10.9711/KTAJ.2017.19.6.1013
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