Electronic Theses and Dissertation

Kegiatan pengangkutan overburden pada industry pertambangan sangat dipengaruhi oleh kondisi geometri jalan angkut yang berberan penting dalam menentukan efisiensi konsumsii bahan bakar. penelitian ini bertujuan untuk menganalisis geometri alat angkut beserta grade resistance dan rolling resistance terhadap konsumsi bahan bakar alat angkut caterpillar 777d pada pengangkutan overburden di pt cipta kridatama, kabupaten bungo, provinsi jambi. penelitian difokuskan pada jalan angkut dari highwall timur rl 70 menuju in-pit dump kerinci rl 50 sepanjang 1.511,83 meter yang dibagi menjadi 16 segmen. hasil pengukuran geometri jalan menunjukan tiga segmen (s3, s5, dan s14) memiliki lebar di bawah standar 22,715 meter akibat penyempitan oleh timbunan spoil, serta grade segmen 1 memiliki grade -10,31% yang melampaui standar internal perusahaan, meskipun masih dalam batas regulasi kepmen esdm no. 1827 tahun 2018 (12%). amblesan jalan pada beberapa segmen turut meningkatkan nilai rolling resistance. berdasarkan perhitungan rimpulll, produktivitas aktual alat angkut sebesar 130,50 ton/jam dengan cycle time rata-rata 15,31 menit, sedangkan konsumsi bahan bakar aktual sebesar 80,23 liter/jam, fuel ratio 0,61 liter/ton, dan fuel cost sebesar rp10.320,95/ton, sedangkan untuk fuel ratio rata-rata pada perusahaan yaitu 0,60 liter/ton sehingga perbaikan geometri jalan angkut dapat menjadi rekomendasi efektif untuk meningkatkan efisiensi operasional dan menekan biaya bahan bakar perusahaan. simulasi perbaikan jalan dengan menurunkan grade segmen 1 menjadi 8% serta memperbaiki amblesan pada segmen yang mengalami undulasi berhasil menurunkan konsumsi bahan bakar menjadi 76,2 liter/jam (hemat rp37.648/jam), serta menurunkan fuel ratio menjadi 0,50 liter/ton dan fuel cost menjadi rp8.958/ton (hemat rp1.362/ton). hasil penelitian menunjukkan bahwa lebar jalan, grade resistance, dan rolling resistance berpengaruh terhadap konsumsi bahan bakar.

Overburden hauling activities in the mining industry are highly influenced by haul road geometry conditions, which play an important role in determining fuel consumption efficiency. This study aims to analyze haul road geometry along with grade resistance and rolling resistance on the fuel consumption of Caterpillar 777D hauling equipment in overburden transportation activities at PT Cipta Kridatama, Bungo Regency, Jambi Province. The study focuses on the haul road from the East Highwall RL 70 to the Kerinci in-pit dump RL 50, covering a distance of 1,511.83 meters divided into 16 segments. The results of the haul road geometry measurements indicate that three segments (S3, S5, and S14) have widths below the standard of 22.715 meters due to narrowing caused by spoil accumulation. In addition, Segment 1 has a grade of -10.31%, which exceeds the company’s internal standard, although it is still within the regulatory limit set by the Indonesian Minister of Energy and Mineral Resources Decree No. 1827 of 2018 (12%). Road subsidence in several segments also increases the rolling resistance value. Based on rimpull calculations, the actual productivity of the hauling equipment is 130.50 tons/hour with an average cycle time of 15.31 minutes. Meanwhile, the actual fuel consumption is 80.23 liters/hour, with a fuel ratio of 0.61 liters/ton and a fuel cost of Rp10,320.95/ton. The company’s average fuel ratio is 0.60 liters/ton, indicating that improvements in haul road geometry can serve as an effective recommendation to enhance operational efficiency and reduce fuel costs. Simulation of haul road improvements by reducing the grade of Segment 1 to 8% and repairing road subsidence in undulated segments successfully reduced fuel consumption to 76.2 liters/hour (saving Rp37,648/hour), decreased the fuel ratio to 0.50 liters/ton, and lowered the fuel cost to Rp8,958/ton (saving Rp1,362/ton). The results of this study indicate that road width, grade resistance, and rolling resistance significantly influence fuel consumption.