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2020 Vol.22, Issue 1

Research Paper

Study on optimal design method for estimation of the mechanical properties of abandoned mine ground

폐광산 지반의 역학적 특성 추정을 위한 최적설계 기법에 관한 연구

Min Son1
,
HyunKoo Moon2*
,
HyukSang Jung3
,
YoungSu Kim4
,
SungHyun Park5
손 민1
,
문 현구2*
,
정 혁상3
,
김 영수4
,
박 성현5
1Research Professor, Dept. of Railway Construction and Safety Engineering, Dongyang University
2Emeritus Professor, Dept. of Earth Resources and Environmental Engineering, Hanyang University
3Assistant Professor, Dept. of Railway Construction and Safety Engineering, Dongyang University
4Department Manager, The Construction Management (CM) Division, Engineering Consultants Corp.
5Director, Division of Rail track Design Engineering & Maintenance, Seohyun Engineering Co., Ltd.
1비회원, 동양대학교 철도건설안전공학과 연구교수
2비회원, 한양대학교 자원환경공학과 명예교수
3정회원, 동양대학교 철도건설안전공학과 조교수
4비회원, (주)한국종합기술 토목감리부 부장
5비회원, (주)서현기술단 궤도사업본부 상무
* Corresponding Author
31 January 2020. pp. 1-21
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Abstract

The domestic abandoned mines are generating subsidence and it is difficult to predict this subsidence and evaluate the risk. The study of the subsidence risk evaluation using the existing numerical analysis only applies the integrative property to the geological structure and ground condition, and analyzes the goaf peripheral plastic domain. Also, there is a realistic limit that only restricted materials can be apprehended in securing the input information, which leads to the low reliability of the numerical analysis result. In this study, 2-dimensional modeling was performed by applying the field geological structure and ground information targeting abandoned mine where the subsidence occurred. Also, the analysis model was revised by repeating the numerical analysis for the difference between the real subsidence ground information and the analysis result to be minimized by modifying the ground property. This revision was automated by applying the optimization technique and the gradational optimal design method dividing multiple ground properties was developed.

Keywords
Abandoned mine
Subsidence
Numerical analysis
Optimization technique
Ground properties

국내 폐광산은 다양한 형태의 침하를 발생시키고 있으며 이러한 침하의 예측 및 위험도의 평가는 대단히 어려운 실정이다. 기존 수치해석을 활용한 침하 예측 및 위험도 평가 연구에서는 지질구조와 지반조건에 대해 통합 물성을 적용하고 채굴적 주변 소성영역을 해석하는데 그치고 있다. 또한 입력정보를 확보하는데 있어 제한된 자료밖에 파악할 수 없는 현실적인 한계점이 존재하며 이는 곧 수치해석 결과의 신뢰성 저하로 연결된다. 본 연구에서는 실제 침하가 발생한 폐광산을 대상으로 현장 지질구조 및 지반정보를 적용하여 2차원 모델링을 수행하였다. 또한 지반물성을 수정하여 해석결과와 실제 침하지 정보(규모, 위치)의 차이가 최소가 되도록 수치해석을 반복하여 해석모델을 보정하였다. 이러한 보정에 있어 최적화 기법을 적용하여 자동화하였으며 다수의 지반물성을 나누어 고려하는 단계적 최적설계 기법을 개발하였다.

키워드
폐광산
침하
수치해석
최적화 기법
지반물성
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 22
  • No :1
  • Pages :1-21
  • Received Date : 2019-10-10
  • Revised Date : 2019-11-21
  • Accepted Date : 2019-12-05
  • DOI :https://doi.org/10.9711/KTAJ.2020.22.1.001
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