IMPROVEMENT IN DRILLING PROCESS UTILIZATION TO INCREASE PRODUCTION RATE AT LOWER WANAGON PROJECT PT FREEPORT INDONESIA

• Main Author: WIJAYANTO 29115304, ARIEF
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21221
• Institution: Institut Teknologi Bandung

PT Freeport Indonesia (PTFI) is a mining company which operate in Mimika, Papua <br /> <br /> <br /> <br /> province. This company market concentrates containing copper, gold, and silver to around <br /> <br /> <br /> <br /> the world. Right now, PTFI has big project related mine closure phase at Lower Wanagon <br /> <br /> <br /> <br /> area. This project is very important for the company as a compliance commitment with <br /> <br /> <br /> <br /> Government of Indonesia regulation. Project started since 2011 and will be completed in <br /> <br /> <br /> <br /> 2023. Objective of this project is to stabilize the overburden material through re-sloping <br /> <br /> <br /> <br /> process. Total earthwork volume of this project is approximately 260 Million tons. <br /> <br /> <br /> <br /> Company expected this project must completed on schedule to avoid additional cost in the <br /> <br /> <br /> <br /> future. <br /> <br /> <br /> <br /> Until 2017, achievement of this project is still 35.5% from the completion target due to <br /> <br /> <br /> <br /> production rate is low. In this project, production rate is influenced by the mining processes <br /> <br /> <br /> <br /> which consist of drilling, blasting, loading, and hauling. This final project will focus to <br /> <br /> <br /> <br /> identifies source of bottleneck in the mining processes and propose alternative solutions in <br /> <br /> <br /> <br /> order to increase production rate. <br /> <br /> <br /> <br /> Bottleneck Identification Model (BMI) that proposed by Kahraman in his dissertation on <br /> <br /> <br /> <br /> 2015 is used as a framework. This model is compare all mining equipment capacity and <br /> <br /> <br /> <br /> actual process rate to identify the bottleneck. This final project found that drilling process <br /> <br /> <br /> <br /> utilization is source of bottleneck. Top four standby reason which become main contributor <br /> <br /> <br /> <br /> in poor drill utilization are waiting area, shift change, no operator, and up from repair. <br /> <br /> <br /> <br /> These standby reason contributes 85.4% of total standby time. Proposed alternative <br /> <br /> <br /> <br /> solution such as improvement in shift change cycle, create integrated mine plan, change <br /> <br /> <br /> <br /> communication procedure are developed to eliminate or reduce standby time duration. <br /> <br /> <br /> <br /> Improvement in drill utilization give significant impact to increase 53.6% of drilling <br /> <br /> <br /> <br /> production rate. Ramping up scenario that proposed in this final project can be used by <br /> <br /> <br /> <br /> Company's management in order to achieve the completion target in 2023. The <br /> <br /> <br /> <br /> implementation process should planned and controlled. Therefore, responsibility persons, <br /> <br /> <br /> <br /> timeline, monitoring tools, and evaluation shall determine prior execution.