A Study on Application of Shotcrete for Improvement of Stability of Mine drift

doi:10.32390/ksmer.2013.50.5.692

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2013 Vol.50, Issue 5 Preview Page Next Page

Research Paper

A Study on Application of Shotcrete for Improvement of Stability of Mine drift 광산갱도 안정성 향상을 위한 숏크리트의 갱도지보 적용성 평가: 마상준·김동민
Sang-Joon Ma and Dong-Min Kim

October 2013. pp. 692-707

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Abstract

In this application study, the problem of the aggregate supplied the domestic mine and the mine support conditions were investigated by field survey and opinion poll. The numerical analysis was performed to draw more effective double-support of mine and the result was confirmed that Shotcrete/Rock bolt combination was safer than other double-support. It was proposed that the Standard mix of mine shotcrete passed the test of the domestic quality standard about the short and long-age compressive strength, flexural strength and equivalent flexural strength. The lab and field test was performed to draw the High-performance and the Economical mix of mine shotcrete, And it was proposed that the High-performance mix can be handled on special situation(fractured zone and weak ground) and the Economical mix can be maintained the optimal strength without high price material.

Keywords

Mine drift

Mine Shotcrete

Field test

Standard mix

Characteristic mix

본 연구에서는 현장조사 및 설문조사를 통해 광산 공급골재의 문제점과 국내 광산의 갱도 지보시공 실태를 파악하였다. 갱도 보강에 가장 효율적인 지보 조합을 도출하기 위해 수치해석을 수행하였으며, 숏크리트/록볼트 조합이 내공변위 및 천단변위가 균형되게 배분되어 발생되었고, 지보재에 작용하는 부재력도 허용치 이내로 가장 안정적인 복합지보임을 확인하였다. 초기 및 중장기 압축강도, 휨강도, 휨인성 등에서 국내 품질기준을 만족하는 표준배합을 도출하였다. 또한, 고성능 및 경제성 배합을 도출하기 위해 광물계 혼화재를 적용하여 실내 및 현장 적용성 평가를 실시하였고, 광산현장의 특수한 상황(파쇄대 및 연약지반)에 따라 효과적인 대응이 가능한 고성능 배합과 갱도 보강에 요구되는 적정 강도를 유지하면서도 경제성을 높일 수 있는 배합을 제안하였다.

키워드

광산갱도

광산 숏크리트

현장실험

표준배합

특성화 배합

References

Bieniawski, Z.T., 1973, “Engineering Classificaitons of Jointed Rock Masses,” South African Institution of Civil Engineers, Vol. 15, No. 2, pp. 335-344.
EFNARC, 1996, European Specifiation for Sprayed Concrete- Guidelines for Specifiers and Contractors.
Expressway & Transportation Research Institute, 2001, Enhan- cement and Quality Control of Steel Fiber Reinforced Shotcrete(Ⅱ).
Expressway & Transportation Research Institute, 2002, Improve- ment of Support System for Road Tunnel with Rock Mass Classification.
Kang, E.G., Ma, S.J. and Kim, D.M., 2011, “The Study on Evaluation of Early Strength of Mining Sprayed-concrete Through Pin Penetration Test,” Proc. of the 2011 Fall National Conference on Korea Geotechnical Society, Gangwon-do, Korea, September 22, pp. 908-914.
Koo, C.M., Jeon, S.W. and Lee, I.W., 2008, “Underground Mine Design and Stability Analysis at a Limestone Mine,” J. of Korea Society for Rock Mechanics, Vol. 18, No. 4, pp. 243-251.
Korea Institute of Construction Technology, 2006, Analysis of a Long Term Durability and Establishment of Standard for Shotcrete.
Korea Institute of Construction Technology, 2008, Development of technique for shotcrete support and stability estimation of large-scale mine in soft ground, Korea Resources Corporation.
Korea Institute of Construction Technology, 2010, Development of Ready-mixed Shotcrete for the Economical Recycling of Industrial by-product and the Improvement of Construction Quality, Ministry of Land, Infrastructure, and Transport.
Korea Institute of Construction Technology, 2012, Development of the mining sprayed concrete and proposing the Design strength classes for application of the domestic mines, Ministry of Trade, Industry and Energy, pp. 1-3.
Korean Concrete Institute, 2008, KCI-SC 102.
Korean Standard, 2002, KS F 2577 Materials for shotcrete.
Korean Tunneling Association, 2007, Tunnel design standard.
Korean Tunneling Association, 2009, Handbook of Tunnel design standard, pp. 109-141, 126-127.
Ma, S.J., Kim, D.M., Kang, E.G. and Yun, K.K., 2010, “Numerical and Experimental Study Applicability of Shotcrete in Mine,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 47, No. 6, pp. 889-901.
Ministry of Land, Infrastructure, and Transport, 2009, Road construction standard specification.
Ministry of Trade, Industry and Energy, 2008, No. 2008-359 of Announcement of MTIE.
Norwegian Tunneling Society & Norwegian Rock Mechanics Group, 1999, Sprayed Concrete for Rock Support-Technical Specification, Guideline and Test methods.

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 : 50
No :5
Pages :692-707
DOI :https://doi.org/10.32390/ksmer.2013.50.5.692

[1] Bieniawski, Z.T., 1973, “Engineering Classificaitons of Jointed Rock Masses,” South African Institution of Civil Engineers, Vol. 15, No. 2, pp. 335-344.

[2] EFNARC, 1996, European Specifiation for Sprayed Concrete- Guidelines for Specifiers and Contractors.

[3] Expressway & Transportation Research Institute, 2001, Enhan- cement and Quality Control of Steel Fiber Reinforced Shotcrete(Ⅱ).

[4] Expressway & Transportation Research Institute, 2002, Improve- ment of Support System for Road Tunnel with Rock Mass Classification.

[5] Kang, E.G., Ma, S.J. and Kim, D.M., 2011, “The Study on Evaluation of Early Strength of Mining Sprayed-concrete Through Pin Penetration Test,” Proc. of the 2011 Fall National Conference on Korea Geotechnical Society, Gangwon-do, Korea, September 22, pp. 908-914.

[6] Koo, C.M., Jeon, S.W. and Lee, I.W., 2008, “Underground Mine Design and Stability Analysis at a Limestone Mine,” J. of Korea Society for Rock Mechanics, Vol. 18, No. 4, pp. 243-251.

[7] Korea Institute of Construction Technology, 2006, Analysis of a Long Term Durability and Establishment of Standard for Shotcrete.

[8] Korea Institute of Construction Technology, 2008, Development of technique for shotcrete support and stability estimation of large-scale mine in soft ground, Korea Resources Corporation.

[9] Korea Institute of Construction Technology, 2010, Development of Ready-mixed Shotcrete for the Economical Recycling of Industrial by-product and the Improvement of Construction Quality, Ministry of Land, Infrastructure, and Transport.

[10] Korea Institute of Construction Technology, 2012, Development of the mining sprayed concrete and proposing the Design strength classes for application of the domestic mines, Ministry of Trade, Industry and Energy, pp. 1-3.

[11] Korean Concrete Institute, 2008, KCI-SC 102.

[12] Korean Standard, 2002, KS F 2577 Materials for shotcrete.

[13] Korean Tunneling Association, 2007, Tunnel design standard.

[14] Korean Tunneling Association, 2009, Handbook of Tunnel design standard, pp. 109-141, 126-127.

[15] Ma, S.J., Kim, D.M., Kang, E.G. and Yun, K.K., 2010, “Numerical and Experimental Study Applicability of Shotcrete in Mine,” J. of The Korean Society of Mineral and Energy Resources Engineers, Vol. 47, No. 6, pp. 889-901.

[16] Ministry of Land, Infrastructure, and Transport, 2009, Road construction standard specification.

[17] Ministry of Trade, Industry and Energy, 2008, No. 2008-359 of Announcement of MTIE.

[18] Norwegian Tunneling Society & Norwegian Rock Mechanics Group, 1999, Sprayed Concrete for Rock Support-Technical Specification, Guideline and Test methods.

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

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