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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Inovasi Pertambangan dan Lingkungan Jurnal Teknik, Komputer, Agroteknologi dan Sains Mining Science and Technology Journal Journal of Engineering Science and Technology Applications Jurnal Teknologi Sumberdaya Mineral
Razak, Supardi
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Journal : Mining Science and Technology Journal

 1 
Analisis Kestabilan Heap Leach Pad Berdasarkan Jumlah Material Yang Dapat Ditampung Pada Projek Tambang XX, Jawa Barat Razak, Supardi; Kusumaningsih, Dewi Ayu
Mining Science And Technology Journal Vol 2 No 1 (2023): Mining Science and Technology Journal
Publisher : Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.799 KB) | DOI: 10.54297/minetech-journal.v2i1.441

Abstract

The XX mining project is one of the gold mining companies in Indonesia that uses the heap leaching method to separate gold from other rocks. But it turns out that this heap leaching pile has a maximum capacity with a total volume of 14000 m3. In order to obtain an optimal slope design from a current slope condition on the planned location of the Heap Leach Pad in the XX mining project so that the cause of the heap failure can be determined with certainty, a geotechnical analysis was carried out referring to the Decree of the Minister of Energy and Mineral Resources Number 1827 K/30/MEM/2018 . In this study, slope stability analysis was carried out using the boundary equilibrium method. The data used is secondary data obtained directly from the XX mining project and laboratory test data. Tests carried out in the laboratory are to determine the value of rock density and shear strength test to determine the value of the inner shear angle and rock cohesion. In the slope modeling, the condition of water pressure is assumed to be maximum and the slope of the heap leaching pile is composed of soil and propylene. From the results of the analysis it was found that the slope was in an unstable condition when the heap leaching capacity was 11000 m3. So it needs to be handled, namely providing recommendations by reducing the height of the slope which was originally 1 meter to 0.5 meters. Keywords: Heap Leaching, Slope Stability, Boundary Equilibrium Method
Studi Nilai Effective Utilization (EU) terhadap Peningkatan Produksi Pengupasan Lapisan Tanah Penutup Tambang Batubara Lusitania, Lusitania; Razak, Supardi
Mining Science And Technology Journal Vol 4 No 1 (2025): Mining Science and Technology Journal
Publisher : Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/minetech-journal.v4i1.923

Abstract

Dalam fleet pengambilan data, produktivitas alat gali muat excavator Komatsu PC 2000 tidak mencapai target yaitu 750 bcm/jam. Ini disebabkan oleh kondisi lapangan yang nyata, di mana alat angkut dan alat gali muat sering berfungsi dengan buruk, menyebabkan waktu tunggu atau penundaan produksi. Tujuan dari penelitian ini adalah untuk menentukan variabel apa saja yang mempengaruhi nilai effective utilization, menganalisis efisiensi dan produktivitas alat gali muat excavator Komatsu PC 2000 sebelum dan sesudah perbaikan, dan menemukan peningkatan nilai produksi dan kehilangan biaya sebelum dan sesudah perbaikan. Hasil penelitian menunjukkan bahwa nilai cycle time menurun selama 42 detik sebelum perbaikan dan menjadi 38 hyd setelah perbaikan. Produksi meningkat dengan nilai awal 2,131.48 bcm dengan kehilangan biaya operasional Rp. 6,001,576.60 menjadi 5,128.56 bcm dan kehilangan biaya operasional Rp. 1,726,387.06 dengan delay time sebelum perbaikan senilai 4.49 jam menjadi 2,25 jam. Ini menunjukkan peningkatan effective utilization sebelum perbaikan sebesar 51% dan peningkatan effective utilization setelah perbaikan sebesar 76%.
Co-Authors Agus Budiono, Agus Ambran Hartono Deniswara, Wafindra Dewi Ayu Kusumaningsih Halimatussa’diah, Nasyitha Haryono, Ahmad Fauzan Khairani, Aulia Putri Lusitania, Lusitania Nabella, Andromeda Razvi, Achmad Widianto, Ahmad Tri