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2021 Vol.31, Issue 3 Preview Page

Research Article

Numerical Analysis of Railway Roadbed Stability with Respect to Underground Cavities and Rock Condition: A Case Study of Shafts at Majang Mine

전산해석을 통한 지하 공동 및 암반 조건에 따른 철도지반 안정성 평가: 마장광산 갱도를 대상으로

Kyunghwan Jang1
,
Dongwon Lee2
,
Kyungnam Min3
,
Chanmook Chung4
,
Jaehyung Yu5
,
Gyeseung Lee1*
장 경환1
,
이 동원2
,
민 경남3
,
정 찬묵4
,
유 재형5
,
이 계승1*
1Ph.D. Candidate, Department of Railroad System Engineering, Woosong University
2Managing Director, Sejong E&C Co., Ltd.
3President, Sejong E&C Co., Ltd.
4Professor, Department of Railroad System Engineering, Woosong University
5Professor, Department of Geological Sciences, Chungnam National University
1우송대학교 철도건설환경공학과 박사과정
2(주)세종이엔씨 상무
3(주)세종이엔씨 대표이사
4우송대학교 철도건설환경공학과 교수
5충남대학교 지질환경과학과 교수
*Corresponding Author
30 September 2021. pp. 295-306
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Abstract

This study used numerical modeling to investigate the stability of railway roadbed in areas with various underground cavities and rock conditions associated with mining activities. It compared combined loads from both passenger and freight trains with loads from only passenger trains. Stability was assessed with reference to the Korean government standards for railway subsidence allowance and railway warping repair. Sufficient stability regarding the railway subsidence allowance standard was not achieved when cavities were at depths of <5 m. The criteria for requiring railway warping repair were met when cavities were at depths of <15 m, depending on the rock fracture condition. This study provides the first report on systematic analysis land subsidence related to cavity size and rock fracture conditions associated with mining activities. We expect that this study could serve as an important reference for railway construction in mining areas.

Keywords
underground cavity
mining
stability assessment
subsidence allowance standard

본 연구는 광산활동에 따른 철도지반 안정성 평가를 위해 채굴적의 심도, 규모 및 암반상태를 다양하게 설정하고, 표준열차하중 조건 중 여객, 화물 혼용 구간과 여객전용선 용도에 따른 지반안정성 평가를 전산해석을 통해 실시하였다. 안정성 평가는 철도설계기준 노반편에 따른 허용잔류 침하량과 선로유지관리지침 뒤틀림 보수조건을 기준으로 실시되었다. 그 결과, 채굴적의 규모 및 위치가 심도 5 m 이하일 경우 침하의 발생이 암반상태에 따라 노반 침하허용 기준을 넘어서며, 뒤틀림 보수기준에는 심도 15 m 이하의 공동일 경우 암반상태를 고려하여 지반보강 설계가 이루어져야 할 것으로 보인다. 노반의 침하허용 범위만 고려할 경우 심도 5 m 이하의 공동에서 암반상태가 고려되어야 한다. 이는 공동의 규모와 암반조건에 따른 침하량이 체계적으로 변화함을 지시하며, 이러한 연구결과는 기존에 제시된 바가 없는 자료이다. 본 연구는 추후 철도건설이 광산지역에서 이루어질 경우 중요한 참고자료로 활용될 수 있을 것으로 기대한다.

키워드
채굴적
광산
안정성 평가
침하허용기준
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 31
  • No :3
  • Pages :295-306
  • Received Date : 2021-07-26
  • Revised Date : 2021-08-18
  • Accepted Date : 2021-08-19
  • DOI :https://doi.org/10.9720/kseg.2021.3.295
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