Abstrak

Baca Juga : ANALISIS FRAGMENTASI BATUAN ANDESIT HASIL PELEDAKAN TERHADAP DIGGING TIME EXCAVATOR GUNA MENYESUAIKAN UKURAN OPTIMUM BUCKET EXCAVATOR KOMATSU PC-200 DI QUARRY BUKIT TAPUAN PT BUKIT ASAM TBK, TANJUNG ENIM, SUMATERA SELATAN (RICA LUCYA FANINTA, 2019) ,

Baca Juga : REDESIGN GEOMETRI PELEDAKAN PADA BATUAN ANDESIT UNTUK MENGOPTIMALKAN FRAGMENTASI DAN PENGARUHNYA TERHADAP BIAYA OPERASIONAL PELEDAKAN DI LOKASI TOWNSITE BASECAMP (TSBC) PT BUKIT ASAM TBK (Yudi Sandy Pratama, 2018) ,

i 23,39 %. berdasarkan metode image analysis dengan menggunakan software split desktop, persentase kelolosan material ukuran 20 cm hanya mencapai 37,13 % dengan rata-rata digging time 10,68 detik, mempunyai powder factor sebesar 0,20 kg/m3. perhitungan design geometri peledakan usulan menggunakan metode perhitungan ici-explosive, konya, dan ash dilakukan guna memperbaiki fragmentasi batuan hasil peledakan, sehingga faktor pengisian bucket dapat mencapai 60 %. persentase lolos ukuran 20 cm sebesar 63,31 % diperoleh nilai digging time 3,48 detik dengan kedalaman lubang 6 meter menggunakan metode ash, 55,59 % diperoleh nilai digging time 4,37 detik dengan kedalaman lubang 6 meter menggunakan metode konya, dan 60,18 % diperoleh nilai digging time 3,91 detik dengan kedalaman lubang 6 meter menggunakan metode ici-explosive. kata kunci : geometri, digging time, metode image analysis, geometri usulan abstract blasting is a stage in the delivery of a rock from its parent rock because it cannot be dug with a mechanical device. pt bukit asam tbk is a coal mining company conducting andesite mining to meet the needs of the company itself, where the rock mining is located in bukit tapuan. excavation and loading of blasting material is carried out by a komatsu pc-200 excavator with a capacity of 1 m3 transported by a hino truck with a capacity 12 tons. the size of the blasting material can affect the optimal digging time of the mechanical device. the fragmentation distribution for komatsu pc-200 excavators is optimal if the percentage of 20 cm breakout reaches 60 %. based on the kuz-ram method, the average rock fragment resulted from blasting is not optimal because the breakthrough percentage with 20 cm size only 23.39 %. based on the image analysis method with split desktop software, the breakthrough percentage of 20 cm size is only 37.13 % with an average digging time 10.68 seconds. it has a powder factor 0.20 kg/m3. calculation of the geometry design of the blasting proposal using the ici-explosive calculation method, konya, and ash is carried out to improve blasting rock fragmentation. the bucket filling factor can reach at least 60 %. the percentage of 20 cm size are 63.31 % have a digging time 3.48 second with a 6 meter depth with ash method, and 55.59 % have a digging time 4.37 second with a 6 meter hole depth with konya method, and 62,59 % have a digging time 3.91 second with a 6 meter hole depth with the ici-explosive method. keywords: digging time, geometry, image analysis method, proposed

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