EVALUASI PENGARUH GEOMETRI JALAN ANGKUT TERHADAP PRODUKTIVITAS DARI PIT PURNAMA MENUJU CRUSHER PLANT DI TAMBANG EMAS MARTABE, PROVINSI SUMATERA UTARA

Abstract

The geometry of roads in transporting materials in mines refers to the design and construction of the roads used to move materials to the specified crusher. This involves considerations such as slope, road width and road curvature to ensure efficiency and safety in the transport process. On mining roads, damage to the road body is often found, such as potholes and the road surface is not smooth. This is caused by several parts of the road experiencing subsidence and water standing on the haul road. Apart from these problems, the relatively narrow condition of the road results in queues for the transport equipment used, and there are several parts of the road that have a steep slope. In this research the author discusses road geometry including: observing straight roads, width at bends, grade, superelevation and crossfall for all geometric segments divided into 23. Where the final ramp road has 11 segments and the akses road has 12 segments. Every geometric parameter of the haul road that has been observed does not have a good standard and therefore needs to be improved so that material transport can run smoothly and well so that production targets can be achieved. The results of the productivity calculation of the conveyance which have been obtained from theoretical calculations for the ADT A60H conveyance are 745.82 Bcm/hour. So these results have not been able to achieve the monthly production targets set by the company. This has an impact on the geometry of the mining roads in the company because at the research location there are still several segment haul roads that do not meet standards.