Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Study on Stability Analysis of Large Underground Limestone Openings considering Excavation Damaged Zone

굴착손상영역을 고려한 대형 석회석 갱내채광장의 안정성 분석 연구

  • 권민혁 (강원대학교 공과대학 자원에너지시스템공학과) ;
  • 최성웅 ;
  • 김창오 (대성엠디아이(주) 신소재연구소)
  • Received : 2016.04.12
  • Accepted : 2016.04.26
  • Published : 2016.04.30
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Abstract

Investigation for rock joints, inspection for rock core, and laboratory tests for rock specimens, in this study, have been performed for identification of the extent and properties of Excavation Damaged Zone in a underground limestone mine, which plans to enlarge the size of openings to improve the production rate. Properties of EDZ and surrounding rock masses have been used numerically for discontinuum analysis, and it is concluded that the effect of EDZ can be increased with increasing the opening size and a blasting pattern of high precision can be suggested for the counterplan.

본 연구에서는 채수율 향상을 목적으로 채굴공동의 대형화를 계획하는 주방식 하이브리드 채광법이 적용되고 있는 갱내 석회석 광산에 대해 갱내절리면 조사, 시추코어 분석, 암석물성시험 등을 통해 굴착손상영역의 범위와 물성의 변화양상을 실험적으로 규명하였으며, 이를 불연속체 수치해석에 직접 반영하여 대형 채굴공동의 안정성을 분석하였다. 채굴공동이 대형화할수록 굴착손상영역의 영향은 커질 수 있음이 확인되었으며 이를 통해 굴착손상영역을 제어할 수 있는 고정밀의 발파패턴이 대안으로 제시되었다.

Keywords

References

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