OPTIMIZATION AND SCHEDULING OF OPEN PIT MINING IN LIMESTONE MINING AT PT XYZ IN SOUTH KALIMANTAN

• Main Author: Fitra Mulyadi, Fauzan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85151
• Institution: Institut Teknologi Bandung

Limestone is one of the mining commodities required by the industry, one of which is the cement manufacturing industry. PT XYZ plans to optimize the pit in limestone mining, then the results of the pit optimization will be used to create an annual scheduling plan for the duration of the mining permit in accordance with the quality requirements specified by the factory. Pit optimization is carried out using the Micromine software. Micromine uses the Lerchs-Grossman algorithm optimization method which is in accordance with industry standards. The optimization results will be compared with the ultimate pit limit design to see the magnitude of the difference produced. Then, the results of the pit design will be inputted into the scheduler to schedule the mine for the duration of the mining permit using the specified parameters. Analysis is carried out on the cost, revenue, and net value obtained in the production scheduling process. The difference in the amount of reserves from the pit optimization results compared to the pit design results is due to technical considerations such as slope geometry and road geometry that must be considered in the pit design. The production schedule carried out during the mining permit period has been sufficient to meet the demand from the cement factory. Furthermore, the analysis of cost, revenue, and net value shows that the net value in each year is positive and has a large value, indicating that the production scheduling plan can be considered by PT XYZ to be used in production operations.