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2021 Vol.58, Issue 1S Preview Page

Research Paper

Analysis of Factors Affecting the Stability of an Underground Mine

갱내 채광 광산 안정성에 영향을 미치는 인자 분석

Donghui Kim1
,
Bum-Jun Kim2
,
Hwanjo Baek3*
김 동휘1
,
김 범준2
,
백 환조3*
1PhD Student, Department of Energy and Resources Engineering, Kangwon National University, Chuncheon, Korea
2Master's Degree, Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Korea
3Professor, Department of Energy and Resources Engineering, Kangwon National University, Chuncheon, Korea
1강원대학교 에너지자원공학과 박사과정
2강원대학교 에너지·인프라 시스템 융합학과 석사과정
3강원대학교 에너지자원공학과 교수
*hwanjo@kangwon.ac.kr
28 February 2021. pp. 75-84
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Abstract

In this study, the stability of an underground mine was evaluated considering the hydro-mechanical characteristics of the rockmass. Recently, mining methods have changed from open-pit mining to underground mining, which has led to an increase in environmental problems and civil complaints. The effects of rock engineering characteristics and hydrogeology factors on the drift and pillar stability were analyzed because the geological conditions, ore properties, in-situ stress, and hydraulic properties vary from mine to mine. When applied to stability analysis, changes in the level of factors, such as factors of safety, was analyzed. Factors with values above the significance level of the properties of discontinuities, in-situ stress, and drift dimensions influence factors of safety were analyzed in terms of fracture size, lateral pressure ratio, fracture aperture, fracture intensity, and drift dimension. In the case of pore-water pressure, the factors of safety showed 23% decrease on the average.

Keywords
Underground mine
Stability
Discontinuities
Pore-water pressure
Factors of safety

본 연구는 갱내 채광 광산을 대상으로 수리역학적 특성을 고려한 갱도 안정성 연구를 수행하였다. 최근 국내의 노천 채광 광산은 민원 및 환경문제 등으로 갱내 채광으로 전환됨에 따라 갱도 안정성 및 지하수 출수문제가 발생하고 있다. 광산마다 지질조건, 광체의 특성, 초기응력, 수리학적 특성 등이 다양하기 때문에 암반 공학적 특성과 수리지질학적 인자들이 갱도 안정성에 미치는 영향을 수치해석 하였다. 안정성 해석에 적용된 인자들의 수준이 변할 때 안전율에 미치는 영향을 분석하였다. 불연속면 특성, 초기응력, 갱도 크기 중 안전율에 영향을 미치는 유의수준 이상의 인자는 불연속면 크기, 측압계수, 불연속면 간극, 불연속면 밀도, 갱도 크기이다. 간극수압을 적용한 경우 역학해석과 비교하여 안전율은 평균 23% 감소를 유발하였다.

키워드
갱내 채광 광산
안정성
불연속면
간극수압
안전율
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 58
  • No :1
  • Pages :75-84
  • Received Date : 2020-12-28
  • Revised Date : 2021-01-29
  • Accepted Date : 2021-02-23
  • DOI :https://doi.org/10.32390/ksmer.2021.58.1.075
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