Pit Optimization for Steep Coal Seams at Pasir Coal Mine, Indonesia
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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.
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.
참고문헌 (9)
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- Lee, B.J., "Deformation events and analysis of discontinuities of the rock slope in the Pasir coal mine, Indonesia", KIGAM Bulletin, 5(1), pp.45~55 (2001)
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