All Issue

2019 Vol.56, Issue 6 Preview Page

Research Paper

Stability Assessment of an Underground Limestone Mine Considering Hydro-Mechanical Characteristics of Fractured Rock Mass

균열암반의 수리역학적 특성을 고려한 갱내채광 석회석 광산의 안정성 평가

Donghui Kim1
,
Hwanjo Baek1*
김 동휘1
,
백 환조1*
1강원대학교 공과대학 에너지자원공학과
* Corresponding Author
31 December 2019. pp. 573-581
PDF XML Citation
Abstract

In this study, the stability of an underground limestone mine was evaluated by studying the hydro-mechanical characteristics of the rock mass. The hydrogeologic properties of the rock mass were estimated from literature reviews on the subject and field observations of rock discontinuities, A three-dimensional hydrogeologic model was constructed from rainfall and groundwater level records of the studied area. The groundwater inflow and the pore pressure distribution within the fractured rock mass were analyzed using numerical analysis software. The results showed that, considering the porewater pressure within the fractured rock mass, calculated values for the factors of safety of the pillars were mostly greater than 1.3 at the studied mine. However, these values were about 18% lower than those of the presumed dry rock mass, which revealed the fact that the effective stress analysis using porewater pressure should be adopted, as the mining operation continues below the groundwater level.

Keywords
hydrogeologic model
porewater pressure
stability analysis
underground limestone mine

본 연구에서는 암반의 수리역학적 특성을 고려하여 갱내채광 석회석 광산의 안정성을 분석하였다. 문헌 및 현장조사를 통하여 암반의 수리지질학적 특성을 파악하고, 해당 지역의 강우조건 및 지하수위 자료로부터 3차원 수리지질모델을 구축하였다. 또한, 상용 수치해석 프로그램을 사용하여 갱내 출수량과 균열암반에 형성된 간극수압의 분포를 분석하였다. 안정성 해석 결과, 연구대상 광산의 광주의 안전율은 간극수압의 영향을 고려한 경우 대부분 1.3 이상으로 나타났다. 그러나, 건조상태를 가정한 경우와 비교하면 약 18% 낮은 값이며, 이는 채광작업이 지하수면 아래에서 진행되는 경우에는 간극수압을 고려한 유효응력해석이 적용되어야 함을 나타낸다.

키워드
수리지질모델
간극수압
안정성 해석
갱내채광 석회석광산
References
1
Assaad, F.A., LaMoreaux, J.W., and Hughes, T., 2004. Field Methods for Geologists and Hydrogeologists, Springer, Berlin, Germany, 183p.
10.1007/978-3-662-05438-3
2
Bear, J. and Cheng, A.H.D., 2010. Modeling Groundwater Flow and Contaminant Transport, Springer Science and Business Media, Berlin, Germany.
10.1007/978-1-4020-6682-5
3
Earle, S., 2014. Physical geology, CreateSpace Independent Publishing Platform, Seattle, United States, 357p.
4
Goodman, R.E., 1989. Introduction to Rock Mechanics (2nd Ed.), Vol. 2, Wiley, New York, United States, 34p.
5
Heath, R.C., 1983. Basic Ground-Water Hydrology(1st Ed.), Vol. 2220, U.S. Geological Survey, Colorado, United States, 9p.
6
Hemant, K., Debasis, D., and Chakravarty, D., 2017. Design of crown pillar thickness using finite element method and multivariate regression analysis. Int. J. Min. Sci. Technol., 27, 955-964.
10.1016/j.ijmst.2017.06.017
7
Hubbert, M.K., 2000. The Theory of Ground-Water Motion. J. Geol., 48(8), 785-944.
10.1086/624930
8
Jung, Y.B., Sunwoo, C., Park, C., Lee, B.J., Cheon, D.S., Lee, D.K., and Jo, Y.D., 2011. Stability analysis on old hard rock mine and suggestion of the unsupported spans of haulage, stope and pillar for redevelopment. J. Korean Soc. Miner. Energy Resour. Eng., 48(3), 268-281.
9
Kim, D.H., Jang, W.Y., and Kang, Y.K., 2009. Numerical analysis on optimum pillar recovery condition in limestone mine operated by sublevel stoping method. J. Korean Soc. Miner. Energy Resour. Eng., 46(6), 776-783.
10
Kim, D.H., Kim, G.M., Choi, Y.S., and Baek, H.J., 2013. A study on the hydraulic modelling of the rockmass in a limestone mine. J. Korean Soc. Miner. Energy Resour. Eng., 50(1), 113-123.
10.12972/ksmer.2013.50.1.113
11
Kim, D.H., Kim, G.M., Kim, D.H., Jung, S.J., and Baek, H.J., 2018. Prediction of the groundwater inflow by three- dimensional hydrogeologic modelling at an underground mine. J. Korean Soc. Miner. Energy Resour. Eng., 55(5), 383-394.
10.32390/ksmer.2018.55.5.383
12
Korea institute of geoscience and mineral resources, 2018. Evaluation of mining site and pillar stability according to production plan, KIGAM-Report, Daejeon, Korea, p.17-18.
13
Korea Meteorological Administration, 2019.02.10, https://data.kma.go.kr
14
Korea Resources Corporation, 2018. Precision survey report on limestone in Miwon-1, KORES-Report-DS2018-LS(Ⅶ), Wonju, Korea, p.11-18.
15
Lee, S.J. and Choi, S.O., 2019. Analyzing the stability of underground mines using 3D point cloud data and discontinuum numerical analysis. Sustainability, 11(4), 945.
10.3390/su11040945
16
Lee, S.K., 2004. A study on improvement of underground ventilation in limestone. J. Korean Soc. Miner. Energy Resour. Eng., 41(4), 313-318.
17
Lewis, M.A., Cheney, C.S., and O' Dochartaigh, B.E., 2006. Guide to Permeability Indices, Open Report CR/06/160N, Nottingham British Geological Survey, Keyworth, Nottingham, United Kingdom, 3p.
18
Malli, T., Yetkin, M.E., Ozfirat, M.K., and Kahraman, B., 2017. Numerical analysis of underground space and pillar design in metalliferous mine. J. Afr. Earth Sci., 134, 265-372.
10.1016/j.jafrearsci.2017.07.018
19
Marek, C., Agnieszka, S., Michal, K., Mateusz, B., Katarzyna, C., and Katarzyna, C., 2016. Stability analysis of underground mining openings with complex geometry. Studia Geotechnica et Mechanica, 38(1), 25-31
10.1515/sgem-2016-0003
20
National Groundwater Information Center, 2019.07.15, https://www.gims.go.kr
21
Read, J. and Stacey, P., 2009. Guidelines for open pit slope design, CSIRO publishing, Melbourne, Australia, p.237-264.
10.1071/9780643101104
22
Sherizadeh, T. and Kulatilake, P.H.S.W., 2016. Assessment of roof stability in a room and pillar coal mine in the U.S. using three-dimensional distinct element method. Tunn, Undergr. Sp. Technol., 59, 24-37.
10.1016/j.tust.2016.06.005
23
Shin, H.S., Sunwoo, C., Han, K.C., and Park, Y.H., 1996. Study on the stability of tunnel and rock mass classification in Danyang limestone quarry. Tunnel and Underground Space, 6, 131-143.
24
Sunwoo, C. and Jung, Y.B., 2006. A study on the rockmass failure and dimension of gangway in underground limestone mines. J. Korean Soc. Miner. Energy Resour. Eng., 43(5), 416-428.
25
Zghibi, A., Zouhri, L., and Tarhouni, J., 2011. Groundwater modelling and marine intrusion in the semi-arid systems (Cap-Bon, Tunisia). Hydrological Processes, 25(11), 1822- 1836.
10.1002/hyp.7948
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 : 56
  • No :6
  • Pages :573-581
  • Received Date : 2019-11-21
  • Revised Date : 2019-12-20
  • Accepted Date : 2019-12-20
  • DOI :https://doi.org/10.32390/ksmer.2019.56.6.573
Journal Informaiton Journal of the Korean Society of Mineral and Energy Resources Engineers Journal of the Korean Society of Mineral and Energy Resources Engineers
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • KCI 문헌 유사도 검사
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close