Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
권호 표지

A Study on the Characteristics of Rock Mass by GSI in Limestone Mine

석회석 광산에서의 GSI 분류법에 의한 암반특성연구

  • ;
  • Kaynnam U. M. Rao ;
  • ;
  • 선우춘 (한국지질자원연구원 지반안전연구부) ;
  • ;
  • 정소걸 (한국지질자원연구원 지반안전연구) ;
  • 전양수 (한국지질자원연구원 지반안전연구부)
  • Published : 2004.04.01
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Abstract

Rock mass classification methods such as RMR, Q system and GSl have been widely adopted with certain modifications for the design of mine openings. The GSI system is the only rock mass classification system that is related to Mohr-Coulomb and Hoek-Brown strength parameters and gives a simple method to calculate the engineering properties of rock masses which can be useful input parameters for a numerical analysis. A detailed surveying for GSI mapping as well as far calculating RMR values was undertaken at Daesung and Pyunghae underground limestone mining sites. RQD values were determined for row locations in these two mining sites. Based on GSI values and intact rock strength properties, the rock mass strength modulus of elasticity as well as the Mohr-Coulomb strength parameter c$_{m}$ and $\phi$$_{m}$ were determined. GSI and RMR are correlated.

GSI, RMR Q와 같은 암반분류법들을 광산 갱도설계에 적용하기 위해서 수정을 통하여 사용하고 있다. GSI시스템은 Mohr-Coulomb과 Hoek-Brown 강도와 관련된 유일한 암반분류법이며 수치해석을 위한 입력자료로 사용될 수 있는 암반의 공학적 성질을 계산할 수 있는 간단한 방법을 제공하는 암반분류법이다. RMR값의 측정뿐 만아니라 GSI 대한 상세한 조사가 대성광업 제천광업소와 한국공항의 평해석회석 광산에서 수행되었다. 그리고 RMR과 Q시스템의 문제점에 대해서도 언급하였고 GSI를 근거로 하여 신선암의 강도, 암반의 강도, 탄성계수와 실험실의 Mohr-Coulomb의 강도상수인 c$_{m}$ 과 $\phi$$_{m}$ 을 결정하였다. 그리고 GSI와RMR의 상관관계에 대해서도 조사하였다.

Keywords

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