ESTIMASI SUMBERDAYA BATUBARA DENGAN METODE CIRCULAR USGS PADA BATUBARA DENGAN DIP TEGAK DI PT INTERNASIONAL PRIMA COAL

ABSTRACT. Lulut Basuki. Coal Resources Estimation using USGS Circular Method for Upright Position Coal Dip at PT Internasional Prima Coal (supervised by Irzal Nur and Sri Widodo) Background. Indonesia is among the top ten coal-producing countries globally, with significant coal reserves located on Sumatra and Kalimantan Islands. This study explored the challenges of estimating coal resources in areas with upright coal dip conditions, which are uncommon and difficult to assess using traditional methods. Aim. This research combined the Circular USGS method with Break-Even Stripping Ratio (BESR) analysis to provide a more accurate estimation of coal resources. Method. Drilling data, geological maps, and economic data were utilized to model and assess coal resources. Collaboration of the USGS Circular method and BESR Analysis will be carried out to solve this problem. Results. The findings indicated that combining these methods offered an reliable estimation of coal resources in the studied area, yielding a total estimated resource of 31.6 million tons. Conclusion. This approach potentially enhances the accuracy of coal resource estimation in similar geological settings and supports further research in mining feasibility studies.