Publish Date
30 Nov -0001
<![CDATA[Abstract. PT Bukit Asam Tbk is a coal mining company located in Merapi Barat District, Lahat Regency, South Sumatra Province, operating under a Mining Business License (IUP) covering approximately 2,861.21 hectares. The company uses a Komatsu PC-2000 excavator and HD-785 dump trucks for overburden removal. However, the production target has not been achieved due to haul road geometry that does not fully comply with Kepmen No. 1827/K/30/MEM/2018 and AASHTO standards. This study evaluates haul road geometry and its influence on equipment productivity. The evaluated parameters include road width on straight and curved sections, road grade, curve radius, superelevation, cross slope, and rimpull. Primary and secondary data were analyzed and compared with the applicable standards. The results show that straight road widths range from 18.25–39.88 m and curved road widths from 22.23–42.42 m. Road grades vary between 0.36% and 17.61%, requiring improvement on one segment exceeding the 12% standard, while superelevation values of 0–4.65% were improved through simulation. Before improvement, loading and hauling productivity were 551.08 BCM/h and 550.58 BCM/h, respectively, below the 600 BCM/h target. After improving the haul road geometry, productivity increased to 711.49 BCM/h and 638.08 BCM/h, while hauling cycle time decreased from 18.11 to 16.51 minutes, contributing to improved operational performance and achievement of the production target. Abstrak. PT Bukit Asam Tbk merupakan perusahaan pertambangan batubara yang berlokasi di Kecamatan Merapi Barat, Kabupaten Lahat, Provinsi Sumatera Selatan, dengan luas Izin Usaha Pertambangan (IUP) sekitar 2.861,21 hektare. Dalam kegiatan pengupasan overburden, perusahaan menggunakan excavator Komatsu PC-2000 sebagai alat muat dan dump truck HD-785 sebagai alat angkut. Namun, target produksi belum tercapai karena geometri jalan angkut belum sepenuhnya memenuhi standar Kepmen No. 1827/K/30/MEM/2018 dan AASHTO. Penelitian ini bertujuan mengevaluasi geometri jalan angkut dan menganalisis pengaruhnya terhadap produktivitas alat muat dan alat angkut. Parameter yang dikaji meliputi lebar jalan lurus, lebar jalan tikungan, grade jalan, jari-jari tikungan, superelevasi, cross slope, dan rimpull. Hasil penelitian menunjukkan bahwa lebar jalan lurus berkisar 18,25–39,88 m, lebar jalan tikungan 22,23–42,42 m, dan grade jalan 0,36–17,61%, sehingga diperlukan perbaikan pada satu segmen yang melebihi batas maksimum 12%. Nilai superelevasi sebesar 0–4,65% juga ditingkatkan melalui simulasi. Setelah perbaikan geometri jalan, produktivitas alat muat meningkat dari 551,08 menjadi 711,49 BCM/jam dan alat angkut dari 550,58 menjadi 638,08 BCM/jam. Peningkatan tersebut dipengaruhi oleh penurunan cycle time alat angkut dari 18,11 menit menjadi 16,51 menit sehingga target produksi perusahaan dapat tercapai.]]>
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