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Research Article

A Study on the Stability Analysis of Underground Mine using LIDAR

LIDAR를 활용한 지하광산의 안정성 분석에 관한 연구

Seung-Joong Lee1
,
Byung-Ryeol Kim2
,
Yeon-Ho Jin3
,
Sung-Oong Choi2*
이 승중1
,
김 병렬2
,
진 연호3
,
최 성웅2*
1Research Institute for Earth Resources, Kangwon National University
2Dept. of Resources Energy System Engineering, Kangwon National University
3D&B Technology Team, Hanwha Co., Ltd.
1강원대학교 지구자원연구소
2강원대학교 공과대학 자원에너지시스템공학과
3(주)한화 D&B기술팀
* 교신저자* Corresponding Author
1 December 2017. pp. 406-421
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Abstract

This study describes a precise numerical analysis process by adopting the real image of mine openings obtained by LIDAR, which can produce a point cloud data by measuring the target surface numerically. Research area is a section of underground limestone mine which is used hybrid room-and-pillar method for improving the production rate. From the application of LIDAR to this section several results were deduced, that is, the central axis of upper and lower vertical safety pillars is distorted to the direction of NW and the section area of lower vertical safety pillar is 34 m2 smaller than the designed area of 100 m2. The results of precise measurement in geometrical shape of mine openings and precise simulation in numerical analysis confirms that LIDAR techniques can be suggested as a valuable tool for stability analysis in underground mine by configuring the mine opening shape.

Keywords
LIDAR
Pillar stability
Numerical analysis
Hybrid room-and-pillar method

본 연구에서는 LIDAR를 이용하여 채굴적의 형상을 수치적으로 정확히 측량하고 이때 획득된 점군 데이터를 3차원 전산해석에 직접 반영함으로써 구조물의 실제 형상을 전산해석에 그대로 반영하는 과정을 모사하고 있다. 해석 대상은 채수율 향상을 목적으로 개발된 주방식 하이브리드 채광법이 적용되고 있는 지하 석회석광산의 일부 구역이다. 연구대상 구역에 대한 LIDAR 측정을 통해, 상하부 수직 안전광주의 중심축은 NW 방향으로 치우쳐 있고 특히 하부 수직 안전광주의 경우 설계단면인 100 m2 보다 약 34 m2 만큼 작은 것으로 확인되었다. 또한 LIDAR 측량 결과를 바탕으로 전산해석을 실시한 결과, 하부 수직보안광주의 하단부에 응력집중이 발생하면서 수직 안전광주 전체에 전단파괴양상이 나타나는 것으로 확인되어 보강작업이 제안된 바 있다. 따라서 LIDAR에 의한 채굴적의 측정은 안전광주의 기하학적 구조 및 현상을 정량적으로 정확히 분석할 수 있으며 이를 통한 채굴적의 안정성 분석은 보다 높은 신뢰도를 제시할 수 있다는 점에서 매우 효과적인 채굴적 형상 계측 기법의 하나로 제안될 수 있을 것이다.

키워드
LIDAR
광주 안정성
전산해석
주방식 하이브리드 채광법
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Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 27
  • No :6
  • Pages :406-421
  • Received Date : 2017-12-04
  • Revised Date : 2017-12-19
  • Accepted Date : 2017-12-20
  • DOI :https://doi.org/10.7474/TUS.2017.27.6.406
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