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All Journal INDONESIAN MINING PROFESSIONALS JOURNAL Jurnal Himasapta International Journal of Marine Engineering Innovation and Research INTAN Jurnal Penelitian Tambang Journal of Sciencce Technology and Visual Culture
Arief, Muhammad Zaini
Program Studi Rekayasa Geologi, Fakultas Teknik, Universitas Lambung Mangkurat
Aerospace Engineering Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analisis Kestabilan Lereng Tumpukan Batubara ROM pada PT Adaro Indonesia Kabupaten Tabalong Kalimantan Selatan Arni, Akbar; Hakim, Romla Noor; Arief, Muhammad Zaini
Jurnal Himasapta Vol 10, No 3 (2025): Jurnal Himasapta Volume 10 Nomor 3 Tahun 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jhs.v10i3.18169

Abstract

Dalam kegiatan pertambangan, batubara yang telah ditambang akan disimpan sementara di ROM (Run of Mine) sebelum diangkut ke pelabuhan dan dijual. Ketika tidak terjadi proses bargaining, batubara yang berasal dari pit akan terus menumpuk di ROM. Penumpukan ini menyebabkan bertambahnya luas dan tinggi tumpukan batubara seiring dengan berjalannya aktivitas penambangan. Peningkatan tinggi tumpukan tersebut berbanding lurus dengan meningkatnya potensi terjadinya longsor. Oleh sebab itu, diperlukan kajian geoteknik untuk menganalisis stabilitas lereng dan memperkirakan risiko longsor pada tumpukan batubara di ROM. Pengambilan dan pengumpulan data dilakukan secara berkala selama dua bulan agar data yang diperoleh bersifat representatif dan dapat digunakan sebagai dasar penelitian. Data yang dikumpulkan meliputi tinggi dan sudut kemiringan lereng tumpukan batubara, geometri tumpukan, jenis serta spesifikasi alat yang beroperasi di ROM, data uji laboratorium batubara, dan data hasil uji CBR. Hasil analisis menunjukkan bahwa tinggi maksimum tumpukan batubara yang aman diterapkan di ROM 19 adalah 15 meter dengan faktor keamanan (FK) ≥ 1,2. Desain geometri tumpukan batubara di ROM 19 menggunakan kombinasi lereng dengan dua bench, yaitu bench pertama setinggi 8 meter dan bench kedua setinggi 7 meter, masing-masing dengan sudut kemiringan 30° dan jarak antar-bench sebesar 8 meter. Kata-kata kunci: faktor keamanan, geometri lereng, kestabilan lereng, run of mine ABSTRACTIn mining operations, coal extracted from the pit is temporarily stored at the Run of Mine (ROM) area prior to transportation to the port and final sale. When no bargaining process occurs, coal continues to accumulate at the ROM, leading to an increase in both the height and area of the stockpile as mining activities progress. The increase in stockpile height is directly associated with a higher risk of slope instability and potential failure. Therefore, a geotechnical assessment is required to evaluate slope stability and to estimate the risk of failure in coal stockpiles at the ROM. Data collection was conducted periodically over a two-month period to ensure representative results for this study. The collected data included the actual height and slope angle of the coal stockpile, stockpile geometry, types and specifications of equipment operating at the ROM, laboratory test results of coal samples, and California Bearing Ratio (CBR) test data.The analysis results indicate that the maximum safe coal stockpile height applicable at ROM 19 is 15 m, with a factor of safety (FS) ≥ 1.2. The proposed stockpile geometry at ROM 19 adopts a combined slope configuration with two benches. The first bench has a height of 8 m with a slope angle of 30°, while the second bench has a height of 7 m with a slope angle of 30°, and the horizontal distance between the two benches is 8 m. Keywords: safety factor, slope geometry, slope stability, run of mine
The Effect of Variations In The Composition And Type of Adhesive For Mixed Peat And Gelam Wood Briquettes on The Physical Characteristics of The Briquettes Andy Nugraha; Muhammad Zaini Arief; Randica Erwin M. Tampubolon; Faisal Putra Rahmadani
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 4 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i4

Abstract

South Kalimantan has quite extensive peatlands, spread across various regions such as Barito Kuala, Banjar, Tapin, and Hulu Sungai Regencies. In these peatlands, gelam trees are often found growing rapidly and possessing various benefits, both for industrial and environmental purposes. With wise management, peat can be used as an environmentally friendly raw material for briquettes, while gelam wood can be utilized to improve the quality of the briquettes. In this study, mixed peat and gelam wood briquettes were made with various compositions (100%:0%, 80%:20%, 60%:40%, 50%:50%, 40%:60%, 20%:80%, and 0%:100%) and types of adhesives (palm sugar and damar resin). To determine the performance of the briquettes, physical characteristics were tested in the form of water content, ash content, volatile matter content, calorific value, and fixed carbon. Test results show that gelam increases the calorific value and volatile matter content but reduces the fixed carbon content, while peat increases the fixed carbon content but lowers the calorific value. Damar adhesive is superior in increasing calorific value and reducing ash content compared to palm sugar. The best briquette combination is ≥60% gelam with damar adhesive for fast, high-energy combustion. For slow, stable combustion, a dominant peat composition with damar adhesive is more suitable.
Co-Authors Ahmad Juaeni Aldina Renata Ali Rahman Alio jasipto Andy Nugraha Arni, Akbar Damar Kusumanto Eko Santoso Eko Santoso Faisal Putra Rahmadani Febriyanti, Sonia Hakim, Romla Noor Indradewa, Rhian Lasron Napitu Marselinus Untung Dwiatmoko Muhammad Kahfi, Muhammad Nursetyo C Putri, Karina Shella Randica Erwin M. Tampubolon Rika Febriyani Riswan Riswan Robby Maulana Rudy Hendrawan Noor SANTOSO SANTOSO Sari Melati, Sari Simon Heru Prassetyo Uyu Saismana