Analisis Kinerja Operasional Pola Pengeboran Wedge Cut: Studi Kasus Waktu Edar dan Efisiensi Bahan Peledak di PT Malea Energy

Abstract

Efficient drilling and blasting operations are critical for optimizing productivity in surface mining.
This study investigates the actual drilling cycle time and explosive application parameters in PT Malea
Energy, which applies a Wedge Cut (V-Cut) pattern. Field data were collected on drilling time, rod
lifting, positioning, and the use of Power Gel explosives and delay detonators. The actual drilling
penetration rate was 1.41 m/min with an effective working time of 520 minutes per shift. A total of 15
explosive cartridges per hole and delay times between 0–3500 ms were applied. Results indicate that
drilling efficiency is significantly influenced not only by cycle time management but also by explosive
delay configuration. This study provides a quantitative evaluation that bridges the gap between field
operation parameters and theoretical efficiency models. The findings are valuable for improving drill-
blast design and time utilization in mid-scale mining operations