PERENCANAAN TAMBANG FRONT 8 PIT MERANTI DI PT ANG AND FANG BROTHER, KABUPATEN MOROWALI, PROVINSI SULAWESI TENGAH

PT Ang and Fang Brother is a company engaged in laterite nickel mining commodities in Morowali Regency, Central Sulawesi Province. The company has several pits, but the pit that is currently operating is the Meranti Pit with Front 8 as the unmined pit. Mining is an industry that requires good planning activities so that it can be a guide for the implementation of mining operations, easier to achieve goals, and maximize profits. This study aims to conduct mine planning on Front 8 which was carried out using Micromine v.2021.5 and Microsoft Excel. The estimation result of ore resources are 285,983 tons. The optimal pit limit is at pit shell 8 with an NPV of $3,276,964.81. The results of the evaluation of ore reserves in the pit design are 223,125 tons with an overburden of 489,219 BCM. The ore based on the result of the sequence design from sequence 1 to 4 are 69,609; 56,485; 66,562; and 30,469 tons, while overburden are 82,031; 167,813; 153,079; and 86,296 BCM. The selection of loaders from sequence 1 to 4 are 2, 3, 3, and 3 units, while haulers are 15, 16, 18, and 15 units. The results of the cash flow analysis show the NPV of USD 2,791,081.76, IRR of 86.96%, and PBP of 1.17 month. The results of the sensitivity analysis show that changes in nickel prices affect NPV more than changes in operating costs. The mine planning result indicates that this project is feasible to be mined.

Keywords: equipment, laterite nickel, mine planning, net present value, pit design