Introduction of Q-slope and its Application Case in a Open Pit Coal Mine

Q-slope의 소개와 노천채탄장에서의 적용 사례

  • Sunwoo, Choon (Korea Institute of Geoscience and Mineral Resources, Geologic Environment Division)
  • 선우춘 (한국지질자원연구원 지질환경연구본부)
  • Received : 2019.09.30
  • Accepted : 2019.10.16
  • Published : 2019.10.31


The RMR and Q-system for characterizing rock mass and drilling core, and for estimating the support and reinforcement measures in mine galleries, tunnels and caverns have been widely used by engineers. SMR has been widely used in the rock mass classification for rock slope, but Q-Slope has been introduced into slopes since 2015. In the last ten years, a modified Q-system called Q-slope has been tested by the many authors for application to the benches in open pit mines and excavated road rock slopes. The results have shown that a simple correlation exists between Q-slope values and the long-term stable and unsupported slope angles. Just as RMR and Q have been used together in a tunnel or underground space and complemented by comparison, Q-Slope can be used in parallel with SMR. This paper introduces how to use Q-Slope which has not been announced in Korea and application examples of Pasir open pit coal mine in Indonesia.


Grant : 시추공 기반 심지층 특성규명 InDEPTH 요소기술 개발

Supported by : 한국지질자원연구원


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