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All Journal Jurnal Sains dan Teknologi Reaksi Jurnal Teknik Indonesia
Bimbi Cahyaningsih
Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Sriwijaya
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Transportation

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Evaluasi Produktivitas Alat Gali-Muat dan Alat Angkut Untuk Overburden dan Batubara di Pit Kungkilan Pt Ulima Nitra Tbk Jobsite Pt Budi Gema Gempita Kabupaten Lahat, Sumatera Selatan Ningsi, Adelia Safriana; Razaqi, Ferina Yasyfa; Yuwono, Raditya Adi; Gobel, Alieftiyani Paramita; Cahyaningsih, Bimbi
Jurnal Teknik Indonesia Vol. 3 No. 2 (2024): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v3i4.378

Abstract

PT Ulima Nitra melakukan kegiatan penambangan di Wilayah Izin Usaha Pertambangan (WIUP) PT Budi Gema Gempita tepatnya di Pit Kungkilan. Penambangan di PT Ulima Nitra, Tbk dilakukan dengan sistem open pit. Pada penelitian ini dilakukan pengamatan di tiga fleet yang terdiri dari 2 fleet overburden dan 1 fleet batubara. Kegiatan penambangan batubara membutuhkan peralatan mekanis seperti alat gali muat untuk menggali tanah penutup dan menggali batubara. Material akan diangkut ke tempat penimbunan dengan alat angkut. Tujuan dari penelitian ini untuk mengetahui produktivitas alat gali-muat dan alat angkut yang digunakan serta mengetahui faktor yang mempengaruhi produktivitas. Pada penelitian ini alat gali-muat yang digunakan antara lain 2 unit excavator Hitachi ZX-870LCH untuk overburden dan 1 unit excavator Volvo EC-480 untuk batubara. Sedangkan untuk alat angkut yang digunakan adalah Komatsu HD465-7R dan CAT OHT 773E untuk overburden, dan dumptruck Hino 500 fm260 jd untuk batubara.
EVALUATION STUDY OF BLAST-INDUCED ROCK FRAGMENTATION USING STEMROCK AND BLASTBAG AIR DECK SYSTEMS WITH THE KUZ-RAM METHOD AT THE LIMESTONE QUARRY NAROGONG SITE OF PT SOLUSI BANGUN INDONESIA TBK Cahyaningsih, Bimbi; Putra, Arahman Panji; Harsono, Dimas Ghani Putra; Avesina, Victor Habib
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.7663

Abstract

PT Solusi Bangun Indonesia Tbk (SBI) has implemented air-deck technology in limestone blasting to optimize explosive consumption while maintaining the required fragmentation quality. This study aims to evaluate and compare the performance of two types of air-deck systems, namely stemrock and blastbag, in producing suitable rock fragmentation at the Sijebi Quarry, Narogong. The research was conducted through three blasting trials with geometry design based on ICI Explosives guidelines and fragmentation prediction using the Kuz-Ram model. The blasting parameters evaluated included burden, spacing, stemming, subdrilling, and charge column length. The results indicate that stemrock air-deck with a 7.5 m primer charge produced 87.12% of fragments smaller than 50 cm, whereas blastbag air-deck under the same conditions achieved 95.31%. However, other trials using blastbag produced coarser fragmentation with fragments exceeding 100 cm. Overall, the most reliable fragmentation distribution, closely aligned with Kuz-Ram predictions, was obtained with a blasting geometry of 4 m burden, 5 m spacing, 3 m stemming, 1 m subdrilling, and a 7.5 m primer charge using ANFO in limestone. This study recommends the aforementioned blasting geometry as the optimal configuration for achieving efficient and effective fragmentation in limestone quarry operations. Keywords: Air Deck, Stemrock, Blastbag, Fragmentation, Kuz-Ram.
Co-Authors Avesina, Victor Habib Gobel, Alieftiyani Paramita Harsono, Dimas Ghani Putra Ningsi, Adelia Safriana Putra, Arahman Panji Razaqi, Ferina Yasyfa Yuwono, Raditya Adi