Electronic Theses and Dissertation

PT Antareja Mahada Makmur jobsite PT Mifa Bersaudara melakukan kegiatan penambangan batubara dengan sistem tambang terbuka (open-pit). Penelitian ini didasarkan pada ketidaktercapaian target produksi batubara pada bulan Mei 2024, dimana fleet 1 hanya mencapai 44% dan fleet 2 hanya mencapai 20% dari target yang telah ditetapkan perusahaan. Penelitian ini dilakukan untuk mengidentifikasi penyebab ketidakcapaian produksi, mengevaluasi kondisi aktual operasional alat berat, serta memberikan rekomendasi teknis yang dapat meningkatkan produktivitas dan efisiensi kerja guna menunjang pencapaian target produksi perusahaan secara optimal. Penelitian ini menggunakan metode deskriptif dengan pendekatan kuantitatif, melalui pengumpulan data primer seperti waktu edar (cycle time), waktu kerja aktual, hambatan operasional alat, ketersediaan alat, kondisi jalan, serta geometri jalan tambang, dan dilengkapi dengan data sekunder dari pihak perusahaan. Hasil analisis menunjukkan bahwa rendahnya efisiensi kerja, tingginya waktu edar, kondisi jalan angkut yang belum optimal, serta ketidaksesuaian antara alat gali muat dan alat angkut (match factor) merupakan faktor-faktor utama penyebab rendahnya produktivitas alat. Upaya optimasi dilakukan melalui perbaikan efisiensi kerja, pengurangan hambatan operasional, dan peningkatan keserasian kerja antara alat gali muat dan alat angkut. Setelah dilakukan optimasi, produktivitas alat meningkat secara signifikan. Selain itu, simulasi penambahan unit hauler menunjukkan potensi peningkatan produksi lebih lanjut. Penelitian ini memberikan rekomendasi teknis seperti hasil dari simulasi perbaikan didapatkan produksi fleet 1 alat gali muat sebesar 314.201,33 ton/bulan dengan ketercapaian produksi 157% dan alat angkut sebesar 237.423,25 ton/bulan dengan ketercapaian produksi 119% sedangkan produksi fleet 2 alat gali muat sebesar 236.796,26 ton/period dengan ketercapaian produksi 147% dan alat angkut sebesar 184.523,66 ton/period dengan ketercapaian 114%.

PT Antareja Mahada Makmur jobsite PT Mifa Bersaudara conducts coal mining activities using an open-pit mining system. This research is based on the failure to meet the coal production target in May 2024, where fleet 1 only achieved 44% and fleet 2 only achieved 20% of the target set by the company. This research was conducted to identify the causes of production shortfalls, evaluate the actual operational conditions of heavy equipment, and provide technical recommendations that can enhance productivity and work efficiency to support the optimal achievement of the company's production targets. This research uses a descriptive method with a quantitative approach, through the collection of primary data such as cycle time, actual working time, operational obstacles of the equipment, equipment availability, road conditions, and mining road geometry, supplemented with secondary data from the company. The analysis results show that low work efficiency, high cycle time, suboptimal haul road conditions, and the mismatch between loading and hauling equipment (match factor) are the main factors causing low equipment productivity. Optimization efforts were made through improving work efficiency, reducing operational obstacles, and enhancing the compatibility between loading and hauling equipment. After optimization, the productivity of the equipment increased significantly. Additionally, the simulation of adding hauler units shows potential for further production increase. This research provides technical recommendations such as the results of the improvement simulation, Fleet 1's loading equipment achieved a production output of 314,201.33 tons per month, corresponding to 157% of the production target. The hauling equipment for Fleet 1 recorded a production of 237,423.25 tons per month, achieving 119% of the target. Meanwhile, Fleet 2's loading equipment reached a production of 236,796.26 tons per period, equivalent to 147% of the target, while its hauling equipment produced 184,523.66 tons per period, achieving 114% of the target.