DESIGN OPTIMIZATION OF GOLD ORE MINING PT XYZ
Gold mineral is a non-renewable resource, and the mineral mining process must be planned with the principle of pit optimization. Mining optimization for mineral reserves can be done by minimizing the amount of waste to obtain much ore that can be mined. PT XYZ is one of the gold mining companies...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/57523 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Gold mineral is a non-renewable resource, and the mineral mining process must be
planned with the principle of pit optimization. Mining optimization for mineral reserves can
be done by minimizing the amount of waste to obtain much ore that can be mined. PT XYZ
is one of the gold mining companies that will carry out mining activities. This study aims to
design an optimal mining pit design for PT XYZ using the mine optimization principle. In
addition, this study aims to determine the effect of fluctuations in mineral selling prices,
operating costs, and overall slope on changes in the company's number of reserves and
profits.
Optimization of a pit design on this research using Micromine 2021 software based
on the Lerchs-Grossmann Algorithm method. The optimization process is carried out by
inputting the required data, namely block models, topographic maps, and cost parameters.
From the results of the pit optimization, the output in the form of Pit Shell is the reference
for the optimal design of the ultimate pit limit. The mining design can determine the ore and
waste mined value, the average mineral content, and the profit from mining. An analysis of
the effect of fluctuations in the selling price of gold, operating cost, and overall slope on the
number of reserves and profits is carried out using the same method by changing the input
parameters of the selling price of gold, mining costs, and overall slope.
The design of the ultimate pit limit design resulted in an optimization result of
1,760,290 tons of mined reserves, 59,711,934 tons of mined waste, and 33.92 SR with Net
Profit from the design amounting to $431,352,662. The Stripping Ratio comparison of the
design is 1.2 times greater than Pit Shell. From the sensitivity analysis of selling price,
operating cost, and overall slope, it is found that fluctuations in the gold price are directly
proportional to the number of reserves and profits, fluctuations in operating costs are
inversely proportional to the number of reserves and profits, and fluctuations of the overall
slope are directly proportional to the number of reserves and profits. |
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