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Analisis Biaya Penggunaan Kapur dan Tawas pada Pengolahan Air Asam Tambang di Settling Pond 03 Pit Paku PT. Rimau Eko Prastyo, Andreashah; Virgiyanti, Lisa; Apui Ganang, Nuansa Mare; Sukmawatie, Neny; Fidayanti, Neny
Jurnal sosial dan sains Vol. 4 No. 10 (2024): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsosains.v4i10.23508

Abstract

Penelitian ini bertujuan untuk menganalisis biaya penggunaan kapur dan tawas dalam pengolahan air asam tambang di Settling pond 03, Pit Paku, PT. Rimau Energy Mining. Air asam tambang, hasil reaksi kimia antara mineral sulfida dan air, memerlukan penanganan khusus untuk mengurangi dampak lingkungan. Penggunaan kapur dan tawas bertujuan untuk meningkatkan pH dan menurunkan kekeruhan air asam tambang. Melalui percobaan laboratorium dengan berbagai dosis kapur dan tawas, penelitian ini menemukan dosis yang paling efektif untuk menetralkan air asam tambang, meningkatkan pH, dan menurunkan kekeruhan sesuai dengan baku mutu yang ditetapkan. Selain itu, penelitian ini juga menganalisis biaya yang diperlukan untuk setiap kombinasi dosis yang diuji, dengan hasil menunjukkan perbandingan biaya pengolahan berdasarkan dosis kapur dan tawas yang digunakan. Berdasarkan analisis biaya, ditemukan bahwa kombinasi dosis kapur dan tawas yang optimal menghasilkan biaya yang lebih efektif dibandingkan metode yang diterapkan sebelumnya.. Dosis yang efektif untuk menetralkan air asam tambang adalah 1 gram kapur dan 2 gram tawas per liter, yang berhasil menaikkan pH dari 3,88-4,13 menjadi 8,10-8,40, serta menurunkan kekeruhan dari 498-522 NTU menjadi 144,9-196,1 NTU.
Slope Stability Analysis of the Mahakam Monthly Pit Highwall Design at PT Arta Bumi Sakti Insani BaraPerkasa Site East Kalimantan Muhammad Faisal Siddiq; Yossa Yonathan Hutajulu; Ferdinandus Ferdinandus; Nuansa Mare Apui Ganang; Yusias Andri
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8031

Abstract

PT Arta Bumi Sakti operates within the mining sector, focusing on the Insani Baraperkasa. A major challenge in open-pit mining in this area is maintaining the stability of highwall slopes, particularly in the 2025 Mahakam monthly pit design. This study aims to evaluate slope stability in the highwall region using the Limit Equilibrium Method through the Bishop Simplified, Janbu Simplified, Morgenstern Price, and Spencer. Geotechnical parameters were obtained from laboratory tests and interpretations of geotechnical drilling data, including unit weight, cohesion, internal friction angle, UCS, and GSI. Software was used to analyze the slope and calculate safety factors while considering groundwater levels, earthquake loads, and ground pressure across two representative cross-sections. The results show that both cross-sections have safety factor values exceeding the minimum threshold established by the Ministry of Energy and Mineral Resources Regulation No. 1827 K/30/MEM/2018, namely, FS > 1.1 and PoF < 20%. Thus, mining activities in this period can be conducted safely. In addition, the Spencer Method, which simultaneously satisfies stability in terms of force and momentum, provides stable results, this can be used as the basis that the Spencer can be used as the main method in the analysis of slope stability in the location.
Coal Downstream Potential in Central Kalimantan Tanggara, Deddy; A.K. Wijaya, Dody; Kristiana, Wita; Mare Apui Ganang, Nuansa; Made Prawindya Kumara , I Dewa
Asian Journal of Social and Humanities Vol. 4 No. 6 (2026): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v4i6.687

Abstract

The management and utilization of coal raise new environmental challenges, such as deforestation and land degradation. The issue of global decarbonization requires that coal utilization operate within permitted capacity limits. Based on its diverse characteristics, coal can be utilized as a processed product. Downstream development through advanced coal processing can increase economic value and optimize land use more efficiently. Data were collected from various references, including scientific journals, research reports, government regulations, and related agency documents. The results provide recommendations for coal downstream development, such as optimizing the use of coal as a processed product for the production of methanol and dimethyl ether (DME), which function as alternative fuels and industrial raw materials, as well as synthetic natural gas (SNG) as a substitute for natural gas in various sectors. Coal liquefaction can convert coal into liquid hydrocarbons or fuel oil, thereby increasing its added value. Coal–biomass briquettes can produce smokeless fuel and be used for co-firing in steam power plants (PLTU). Extraction of rare earth elements (LTJ) from coal combustion residues also presents potential, as LTJ have high economic value and are fundamental to modern industries. The application of clean coal technologies, including Integrated Gasification Combined Cycle (IGCC) and Carbon Capture and Storage (CCS), can reduce carbon emissions from coal utilization. Based on these results, diversification of coal utilization through downstream development and clean technologies represents a strategic effort to address environmental challenges and respond to global decarbonization issues in Central Kalimantan Province.
Perancangan Mine Sequence untuk Mendukung Target Produksi Bulan April pada Tambang Nikel Laterit Pit Hill16 PT Hillconjaya Sakti Irga loti Rante; I Putu Putrawiyanta; Noveriady Noveriady; Nuansa Mare Apui Ganang; Yunida Iashania
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 2 (2026): Agustus: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i2.8903

Abstract

This study is motivated by the discrepancy between production targets and actual field performance caused by dynamic operational conditions, such as equipment productivity and effective working time. The objective of this research is to redesign the production target and develop a more realistic mine sequence using a rolling plan approach at Pit Hill16. The method includes analyzing the productivity of loading and hauling equipment based on cycle time data, calculating effective working time, and determining production targets using the rolling plan method. Furthermore, mine sequence design is developed based on the adjusted production targets. The results indicate that the productivity of loading equipment is 241.98 BCM/hour for the EC480DL excavator and 123.27 BCM/hour for the EC210DL excavator, while hauling equipment productivity is 40.24 BCM/hour. The April production target based on the rolling plan is 275,913 BCM, which can be achieved through mine sequence design with a volume of 277,839 BCM, resulting in a difference of +1,926 BCM, still within acceptable planning tolerance. Therefore, the rolling plan approach is proven to produce a more adaptive and realistic mining plan under actual field conditions.