PRODUCTIVITY OF THE FURUKAWA CRD PCR 200 DRILLING MACHINE IN MAKING BLAST HOLES IN ANDESITE ROCK MINE
Abstract
Blast hole drilling is a critical stage influencing blasting success and the achievement of production targets in andesite mining operations at CV. Mitra Persada Batu Buil, West Kalimantan. The company set a production target of 60,000 m³/year, yet actual production reached only 53,000 m³/year. This study aims to analyze the productivity of the Furukawa CRD PCR 200 drilling rig, identify the factors influencing it, and evaluate production target achievement. The methodology employed included field surveys and quantitative analysis of data regarding cycle times, drilling speeds, work efficiency, and equipment availability. Research results indicate an actual drilling productivity of 29.41 m³/hour, compared to a recommended productivity of 46.35 m³/hour. Factors influencing drilling operations include an actual work efficiency of 58.97% (318.47 minutes), which could be improved to 71.85% (388 minutes) by reducing operational delays. Actual drilling output was 8–9 holes/day against a recommendation of 10 holes/day, with a drilling speed of 0.16 m/minute and a volume yield of 5 m³/meter. Metrics for Mechanical Availability (91.03%), Physical Availability (91.95%), Use of Availability (79.15%), and Effective Utilization (73.43%) indicate good equipment performance. Improving work efficiency and managing operational delays have the potential to support the achievement of the company's production targets.
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