#TITLE_ALTERNATIVE#

• Main Author: (NIM : 12105068); Pembimbing : Dr. Rudianto Ekawan, ST., MT., ROSIKIN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19372
• Institution: Institut Teknologi Bandung

PT. Istek Mine is a branch company of PT. XYZ tbk. Nowadays PT.Istek Mine get Kontrak Karya Genersi VII with total area covering 36.070 Ha. It covers 2 block in <br /> <br /> Gorontalo Province, Blok Tomulilato and Blok Molotabu. <br /> <br /> As known that PT. Istek Mine has two prospect projects that are Sungai Maks prospect and Cabang Kiri East prospect . Sungai Maks prospect has porfiri type ore <br /> <br /> deposit which would be mined using open pit method with average production planning about 5.784.120 ton of ore per year. The prospect of Cabang Kiri East has a type of ephitermal low sulphidation deposit which would be mined using block caving method with average production of 15.000 ton ore per day or similar to 4.500.000 ton ore per year. <br /> <br /> This thesis done to analyze the worthiness mining plan of PT. Istek Mine using method open pit and underground based on mine design. Using the calculation of estimated cost and benefit income then we would get discounted cash flow projection. Based on discounted cash flow known the amount of NPV, IRR, and PBP of the open pit project in the amount of 191.258.466 USD, 19,67%, and 5,67 years. The amount of NPV, IRR and PBP for underground project is 150.473.582 USD, 15,55 % and 7,60 years. To this NPV,IRR and PBP amount thus project decided feasible to be implemented. <br /> <br /> The uncertainty analysis done with deterministic sensitivity analysis. By this all, it is known that most sensitive parameter is price of copper with influenced 35,3% for open pit project and 22,1% for underground project. Risk analysis done to analyze it's probabilistic sensitivity. The analysis produced coefficient of variability (CoV) for each open fit and underground project in amount of 0,8082 and 0,6602