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Evaluación comparativa de sensibilidad técnico-económica bajo unaenvolvente Benchmark fija en minería a cielo abierto
Comparative evaluation of technical-economic sensitivity under afixed Benchmark envelope in open-pit mining
DOI:
https://doi.org/10.15446/rbct.n60.126975Palabras clave:
minería a cielo abierto, valor presente neto, planificación minera, evaluación económica, geotecnia, análisis de sensibilidad (es)open-pit mining, net present value, mine planning, economic evaluation, geotechnics, sensitivity analysis (en)
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Se evaluó el impacto de escenarios económicos, geotécnicos y operativos sobre el valor presente neto (VPN) en minería a cielo abierto, utilizando la instancia Marvin de MineLib. El análisis se desarrolló en RStudio sobre una envolvente benchmark fija basada en la solución UPIT, con 8.516 bloques y 527,147 Mt. Se compararon seis configuraciones mediante valor del pit, máximo VPN acumulado del secuenciador heurístico, material favorable programado, estéril programado y relación estéril-mineral (REM). El caso mercado presentó el mejor desempeño económico, con 745,680 MUSD de valor del pit y 33,951 MUSD de máximo VPN acumulado. El caso base mostró la mejor eficiencia física, con 38,837 Mt de material favorable programado y una REM de 0,648. Se concluye que, bajo geometría fija, la captura de valor depende de la valorización, la accesibilidad y la secuencia temporal.
The impact of economic, geotechnical, and operational scenarios on net present value (NPV) in open-pit mining was evaluated using the Marvin instance from MineLib. The analysis was developed in RStudio on a fixed benchmark envelope based on the UPIT solution, comprising 8,516 blocks and 527.147 Mt. Six configurations were compared using pit value, maximum cumulative NPV from the heuristic waste, and strip ratio. The market scenario showed the best economic performance, with a pit value of 745.680 MUSD and a maximum cumulative NPV of 33.951 MUSD. The base case recorded the best physical efficiency, with 38.837 Mt of scheduled favorable material and a strip ratio of 0.648. It is concluded that, under fixed geometry, value capture depends on valuation, accessibility, and temporal extraction sequence.
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