Stability Analysis of Pillar in Underground Limestone Mine Using 3D Scanning Techniques

Donghui Kim; Gyoungman Kim; Hwanjo Baek

doi:10.32390/ksmer.2022.59.1.010

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2022 Vol.59, Issue 1 Preview Page Next Page

Research Paper

Stability Analysis of Pillar in Underground Limestone Mine Using 3D Scanning Techniques 3D 스캐닝 기법을 활용한 갱내채광 석회석 광산 광주의 안전성 분석

28 February 2022. pp. 10-20

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Abstract

In this study, point-cloud data were obtained using a laser scanner for an underground limestone mine. A total of 581 discontinuities were extracted and statistically treated using the obtained point-cloud data, and a discrete fracture network was simulated and applied to the numerical analysis model. The stability was evaluated for two pillars located in large underground openings using the numerical analysis model. The evaluation results based on the safety factor and displacement showed that the safety factor tended to decrease as it progressed from the center of the pillar to the side wall. However, the pillars showed a minimum safety factor of 1.0 or higher. For the displacement, a maximum displacement of 9 mm occurred in a part of the pillar side wall. Nevertheless, the stability of the pillar was achieved, as it was insignificant compared to the size of the pillar.

Keywords

Laser scanner

Point-cloud data

Discrete fracture network (DFN)

Safety factor

Displacement

본 연구에서는 갱내채광 광산을 대상으로 레이저 스캐너를 이용하여 점군 데이터를 획득하였다. 획득한 점군 데이터를 활용해 총 581개의 불연속면을 추출하여 통계처리 후, 불연속 균열망을 모사하여 수치해석 모델에 적용하였다. 수치해석 모델을 활용해 대형 채광장에 위치하는 두 개의 광주를 대상으로 안정성을 평가하였다. 안전율과 변위를 기준으로 평가한 결과, 안전율은 광주의 중심에서 측벽으로 진행할수록 낮아지는 경향을 보였으나 모두 최소안전율 1.0 이상으로 나타났다. 변위의 경우 측벽 일부 구역에서 9 mm의 최대변위가 발생하였지만, 광주의 규모에 비교하면 미미한 수준으로 나타나 광주의 안정성이 확보되는 것으로 분석되었다.

키워드

레이저 스캐너

점군 데이터

불연속 균열망

안전율

변위

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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 : 59
No :1
Pages :10-20
Received Date : 2021-12-31
Revised Date : 2022-01-27
Accepted Date : 2022-02-22
DOI :https://doi.org/10.32390/ksmer.2022.59.1.010

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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