Pit Optimization for Steep Coal Seams at Pasir Coal Mine, Indonesia

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2009 Vol.46, Issue 5 Next Page

Pit Optimization for Steep Coal Seams at Pasir Coal Mine, Indonesia Pasir 탄광에서의 급경사 석탄층에 대한 채탄사면의 최적화 연구: D. Deb, 선우춘, 정용복
D. Deb, C. Sunwoo and Y.B. Jung

31 October 2009. pp. 509-520

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Abstract

Coal seams of study Coal Mine are found to be of irregular shape, steeply dipping and having variable thickness. Due to steep coal seams with varying thickness, pit optimization became imperative to improve stripping ratio and net profitability of the mine. In this study, Lerchs-Grossmann algorithm is applied to obtain the optimum pit geometry, net pit value, coal production, stripping ratio and profitability index for mining coal seams. The MAXPIT software has been developed specifically to determine the optimum pit geometries at various sections of the mine for the estimation of net pit value, coal production, stripping ratio and profitability index. The study is also extended for the determination of vertical depth of the pit that can be mined with maximum profitability and minimum stripping ratio. This paper elaborates the methodologies, application of MAXPIT software and results of the optimum pit geometries at 50 different sections of the Roto South coal deposit.

Keywords

Open pit mining

Pit optimization

Lerchs-Grossmann algorithm

Stripping ratio

Steep coal seam

인도네시아 Pasir광산의 Roto 남부지역에 분포하는 탄층의 부존형태는 탄폭의 변화가 심하고 경사가 급하며 불규칙적이다. 이러한 탄의 부존형태 때문에 박토율과 광산의 순수익성에 대한 개선이 필수불가결한 실정이다. 이 연구에서는 Roto 남부지역에 분포하는 변화가 심한 탄층의 수직단면을 대상으로 최적의 pit 모양과, pit의 내재가격, 석탄의 생산량, 박토율 그리고 수익성을 구하기 위하여 Lerchs-Grossman의 알고리즘이 적용되었다. pit의 최적화를 위한 알고리즘 중에서 Lerchs-Grossman의 알고리즘이 노천광의 기하학적인 분석에 있어서 가장 널리 사용된다. MAXPIT 프로그램은 광산의 여러 단면에서 최적의 pit 모양과, pit의 내재가격, 석탄의 생산량, 박토율 그리고 수익성을 결정하기 위해 Lerchs-Grossman의 알고리즘과 GUI의 환경을 채택하여 개발되었다. 이 연구에서 최대 및 최소의 박토율에 따른 수직개발 한계심도를 결정하였고, 또한 MAXPIT 프로그램의 사용에 의한 Roto South의 탄층중 50개의 단면에 대해 최적의 pit 모양에 대한 결과를 제시하였다.

키워드

노천채광

사면 최적화

Lerchs-Grossmann 알고리즘

박토율

급경사 탄층

References

Alford, C.G. and Whittle, J., 1986, “Application of Lerchs-Grossmann Pit Optimization to the Design of Open Pit Mines,” Aus IMM/IE Aust Newman Combined Group, Large Open Pit Mining Conference, pp. 201-207.
Cacchta, L. and Giannini, L.M., 1988, “An Application of Discrete Mathematics in the Design of an Open Pit Mine,” Discrete Applied Mathematics 21, pp. 1-19.
Chung, S.K., Han, K.C., Shin, H.S., Sunwoo, C., Lee, B.J., and Choi, S.O., 2003, Geotechnical study on the stabilization for slopes of Pasir Coal Mine, KIGAM Report.
Dowd, P.A. and Onur, A.H., 1993, “Open Pit Optimization – Part 1: Optimal Open Pit Design,” Transaction (Section A: Mining Industry), Institution of Mining and Metallurgy, 102, pp. A95-A104.
Fourie, G.A. and Dohm, G.C., 1992, Open Pit Planning and Design, SME Mining Engineering Hand Book, SME Publisher, USA, pp. 1274-1297.
KIGAM, 2008, “The MAXPIT Pit Optimization Software,” copyrighted 2008, authors: Deb, D., Sunwoo, C. and Jung, Y.B.
Lee, B.J., Sunwoo, C. and Chung, S.K., 2001, “Deformation events and analysis of discontinuities of the rock slope in the Pasir coal mine, Indonesia,” KIGAM Bulletin, Vol. 5, No. 1, pp. 45-55.
Lerches and Grossmann, 1965, “Optimum Design of Open Pit Mines,” Transactions, CIM, Vol. LXVIII, pp. 17-24.
McCarter M.K., Bricker, M.L., Anderson, G.P., Kirk, S.J., 1992, Open Cast (Strip) Mining, SME Mining Engineering Hand Book, SME Publisher, USA, pp. 1403-1446.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 46
No :5
Pages :509-520

[1] Alford, C.G. and Whittle, J., 1986, “Application of Lerchs-Grossmann Pit Optimization to the Design of Open Pit Mines,” Aus IMM/IE Aust Newman Combined Group, Large Open Pit Mining Conference, pp. 201-207.

[2] Cacchta, L. and Giannini, L.M., 1988, “An Application of Discrete Mathematics in the Design of an Open Pit Mine,” Discrete Applied Mathematics 21, pp. 1-19.

[3] Chung, S.K., Han, K.C., Shin, H.S., Sunwoo, C., Lee, B.J., and Choi, S.O., 2003, Geotechnical study on the stabilization for slopes of Pasir Coal Mine, KIGAM Report.

[4] Dowd, P.A. and Onur, A.H., 1993, “Open Pit Optimization – Part 1: Optimal Open Pit Design,” Transaction (Section A: Mining Industry), Institution of Mining and Metallurgy, 102, pp. A95-A104.

[5] Fourie, G.A. and Dohm, G.C., 1992, Open Pit Planning and Design, SME Mining Engineering Hand Book, SME Publisher, USA, pp. 1274-1297.

[6] KIGAM, 2008, “The MAXPIT Pit Optimization Software,” copyrighted 2008, authors: Deb, D., Sunwoo, C. and Jung, Y.B.

[7] Lee, B.J., Sunwoo, C. and Chung, S.K., 2001, “Deformation events and analysis of discontinuities of the rock slope in the Pasir coal mine, Indonesia,” KIGAM Bulletin, Vol. 5, No. 1, pp. 45-55.

[8] Lerches and Grossmann, 1965, “Optimum Design of Open Pit Mines,” Transactions, CIM, Vol. LXVIII, pp. 17-24.

[9] McCarter M.K., Bricker, M.L., Anderson, G.P., Kirk, S.J., 1992, Open Cast (Strip) Mining, SME Mining Engineering Hand Book, SME Publisher, USA, pp. 1403-1446.

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

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