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INDONESIA
Indonesian Mining Journal
Published by PUSLITBANG Teknologi Mineral dan Batubara
ISSN : 08549931     EISSN : 25278797     DOI : -
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science
This Journal is published periodically two times annually : April and October, containing papers of research and development for mineral and coal, including exploration, exploitation, processing, utilization, environment, economics and policy. The editors only accept relevant papers with the substance of this publication.
Arjuna Subject : -
Articles 264 Documents
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Index Abstrak
Indonesian Mining Journal Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

PEMANFAATAN MINYAK BERAT HASIL PERENGKAHAN KATALITIK MINYAK PLASTIK POLYPROPYLENE-LOW DENSITY POLYETHYLENE UNTUK MENINGKATKAN KUALITAS LIGNIT Marlinda, Lenny; Mardhatillah; Raden Ilham; Rahmi; Muhammad Al Muttaqii
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1544

Abstract

The most obvious characteristics of lignite are its high moisture content (30-50%) and relatively low calorific value compared to other types of coal. This causes low combustion efficiency, making it not optimal for use as fuel. In this study, the slurry dewatering process was applied to coal that has a low calorific value of 3,662 cal/g and a moisture content of 37.29%. The addition effect of heavy oil from catalytic cracking of Polypropylene-Low Density Polyethylene (PP/LDPE) plastic waste pyrolysis oil on improving quality of lignite was investigated in this study. Heavy oil was used as additive. The ratio of 120 mesh lignite to heavy oil used was 100:15, 100:30, 100:45, 100:60, 100:75, and 100:90 (g/mL). Coal was carried out with a slurry dewatering process in an autoclave at various temperatures of 140 and 150 °C for 60 min. The test results obtained the highest calorific value of 6,374 cal/g and the moisture content of 2.81% for a ratio of lignite to heavy oil of 100: 45 g/mL at a temperature of 140 °C.
ESTIMASI JAMINAN PASCATAMBANG USAHA PERTAMBANGAN MINERAL BATUAN PT. X DI KABUPATEN MANOKWARI Setiawan, Arif; Imbo, Yuldi Christiani; Paradida, Yulia Putri
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1561

Abstract

PT. X is one of the companies in Manokwari that is engaged in rock mining. Currently, the company has conducted a feasibility study and has progressed to the production operation stage. Any company that aims to upgrade its license from an Exploration Mining Business License (IUP) to a Production Operation License is required to prepare a post-mining plan document, which includes post-mining financing. The amount of this financing will be deposited in a bank as a post-mining guarantee to the government. This study aims to estimate the amount of the post-mining guarantee that will be deposited on behalf of the government. To achieve this objective, the study employs an applied research method by referring to the Minister of Energy and Mineral Resources Decree No. 1827 K/30/MEM/2018. The results of this study show that the post-mining guarantee consists of direct costs amounting to IDR 92,750,110 and indirect costs amounting to IDR 15,303,768, resulting in a total post-mining cost of IDR 108,053,878 to be deposited. Based on these findings, the post-mining guarantee will not be fully paid at once, but will be divided into three installments: in the first year, IDR 55,242,545 will be deposited, followed by IDR 33,891,302 in the second year, and IDR 23,102,571 in the third year.
PERHITUNGAN KONSUMSI BAHAN BAKAR PADA HD 465 -7R MENGGUNAKAN METODE RPM MESIN DAN PENDEKATAN PER SEGMENT PADA PERUSAHAAN PERTAMBANGAN DI KALIMANTAN TIMUR Pranajiwa; Shalaho Dina Devy; Albertus Juvensius Pontus; Windhu Nugroho; Harjuni Hasan
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1578

Abstract

Fuel is usually used by engines to move or do work. In this article, the machine is a mining industry vehicle with the code HD 465 – 7R type from the Komatsu company. The vehicle is used to move overburden material from the loading area to the disposal area. Fuel consumption is usually influenced by several factors, the most influential of which are the slope of the road, the type of material used for the road, and the distance from the loading place to the dumping place. There are several methods are used to calculate fuel consumption, the most familiar of which is the vehicle working hours (hour meter) method. In this research, the calculation of fuel consumption uses engine RPM with a segment approach method taken with a segment distance of between 100 - 200 meters. The results of calculating fuel usage on the HD 465 – 7R have a figure of 51.7 liters/hour, with the actual value being 51.9 liters/hour. The conclusion of this research is that by using the engine RPM method, the results of fuel usage calculations are also close to the actual values. Testing by RPM with an hour meter is very different, where testing by RPM is based on the length of duration at that RPM number; the higher the RPM and the longer the duration of time, the greater the fuel released. This is continuous with the road segment, where an uphill road segment will definitely increase travel time due to a decrease in speed, and the RPM will increase.
REVIEW MINERAL KRITIS GLOBAL DAN TANTANGAN EKSPLORASINYA DI INDONESIA Rizal, Khairu; Nurkhamim; Idrus, Arifudin
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1605

Abstract

Global critical minerals will highlight critical minerals such as lithium, cobalt, rare earth elements (REEs) and nickel that are critical in the clean energy transition. The analysis also covers the distribution of critical minerals in different regions of the world, including Europe, Africa, the Middle East, and Asia. It also discusses challenges in the extraction and processing of critical minerals and implications for sustainable exploration practices. The method used was a literature review of journals. The results show that countries such as Australia, the Democratic Republic of Congo, and China have significant critical mineral reserves. However, the African continent also has great potential in providing critical minerals needed for the clean energy transition. Therefore, emphasizing the importance of securing a reliable supply of critical minerals to support industrial and technological ambitions. In conclusion, then, with Australia, China, and Africa as major providers of clean energy, the provision of critical minerals such as nickel, lithium, cobalt, and REEs is essential for the clean energy transition and to control processes and reduce production costs, improve geological data and laboratory facilities for analysis are required. Indonesia has significant reserves for the global transition to clean energy and technological advancement. Hence, it is strategically positioned in the global mineral market as it becomes a focal point for geopolitical competition, especially between major powers. The regulatory framework in Indonesia can be complex and can pose challenges for foreign investment to enter, so addressing these challenges through increased research and regulatory alignment will be critical to unlocking Indonesia's abundant REE resources and meeting global demand.
SEBARAN DAN KARAKTERISTIK BATUAN ULTRAMAFIK SEBAGAI POTENSI NIKEL LATERIT SERTA KAITANNYA DENGAN PENYIMPANAN KARBON PADA DAERAH SOROWAKO Sambodo, Tri Hananto Priyo; Sukiyah, Emi; Hutabarat, Johanes
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1608

Abstract

Ultramafic rocks, as the main raw material for the formation of nickel laterite in nature, are important object to study and explore for their availability since nickel is very important mineral in producing batteries for electric cars which is expected to reduce carbon emissions in the future. Along with that, the storage of carbon dioxide in ultramafic rocks is considered as one of the safest storage method because carbon dioxide reacts naturally with magnesium-rich minerals contained in these rocks. The reaction between carbon dioxide and magnesium-rich minerals such as olivine, pyroxene, and serpentine will produce magnesite (MgCO3), which is more stable in nature. Ultramafic rocks have wide distribution in southeastern arm of Sulawesi Island, especially in Sorowako and the surrounding areas. The method used in this research is an observation method on outcrops and supported by laboratory analysis. Ultramafic rocks in Sorowako area have wide distribution and have varying degrees of serpentinization. The magnesium (Mg) element contained in the research area is widely spread as well as the development of geological structure allows the potential development of ultramafic rocks as carbon storage.
Tabel of Contents
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

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Abstract

PENGARUH PROSES HIDROTERMAL TERHADAP PENINGKATAN NILAI KALOR DAN PENURUNAN KADAR AIR PADA BATUBARA PERINGKAT RENDAH Marlinda, Lenny; Pane, Xena Maharani; Wiratama, Jarot; Zahar, Wahyudi; Khadafi, Muhammad Reza; Rahmi
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1539

Abstract

As a low-rank coal, brown coal is characterized to have high water content. It is required a method to improve coal quality that can be used for effective coal utilization. One of the methods is to apply thermal dewatering technology which focuses on improving the quality of low-rank coal using water medium and autoclave. The purpose of this study was to determine the effect of coal to water ratio (w/v) and the effect of particle size of a low rank-coal on water content and calorific value using the hydrothermal method. Coal was processed under hydrothermal conditions at 150 °C for 60 min. For a mixture of 100 g of 25 mesh coal and 50 mL of water, the calorific value and water content after the hydrothermal process reached 5,849 kcal/kg and 5.10% (adb), respectively. While for a mixture of 100 g of 40 mesh coal and 50 mL of water, the calorific value and water content after the hydrothermal process reached 5,789 kcal/kg and 4.94% (adb), respectively. The calorific value obtained increased from the initial value of 3,296 kcal/kg and the water content decreased from the initial value of 44.34% for the coal condition before hydrothermal process. It can be concluded that the hydrothermal process with heating without oxygen carried out by a hydrothermal reactor could increase the calorific value of low-rank coal and reduce water content.
PENILAIAN PERBANDINGAN KESTABILAN LERENG BATUAN MENGGUNAKAN GENERALIZED ANISOTROPIC DAN JOINT NETWORK Akbar, Wahyu Nusantara; Barlian Dwinagara; Singgih Saptono; Dahono Haryanto; Shofa Rijalul Haq; Bagus Wiyono; Oktarian Wisnu Lusantono
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1548

Abstract

Rock slope stability analysis in a geotechnical study is an important issue in mining engineering. Kinematic analysis is a well-known method to determine potential failures of the rock slope based on structural orientations, but it sometimes disregards the structural properties information. Structural properties are often known as the highly interpreted domains in rock slope engineering; thus, simplification was made for the analysis. Simplification may lead to vague conditions of analysis and reduce its accuracy. Therefore, the aims of this research is to assess the effect of rock structure properties such as heterogeneity, discontinuity, and anisotropic properties of the rock mass. The assessment conducted using the limit-equilibrium method employed the Generalized Anisotropic (GA) material model were compared with finite element method (FEM) using the shear strength reduction (SSR) method employing the joint network rock mass model. The analysis results show that an actual rock slope with a generalized anisotropic material model in the LEM analysis and joint network material model in the FEM analysis is stable with Safety Factor > 1, and the maximum strain model is less than the minimum strain threshold (maximum strain < 0.1). Combining rock slope stability analysis methods aims to produce accurate and representative results regarding the rock mass' condition. This research improves the interpretation of rock slope stability analyses, resulting in a more accurate estimation of the factor of safety (FOS).
PENILAIAN TEKNIS DAN EKONOMIS KUALITAS PENGELOLAAN LINGKUNGAN STOCKPILE BATUBARA UNTUK LINGKUNGAN BERKELANJUTAN Juniah, Restu; Ambarita, Novitasari; Syarifudin; Zakir, Syaifudin; Rahmi, Hisni; Amanda, Ridho Rizky
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1595

Abstract

Coal mining has positive impacts in the form of increasing the national economy and people's income. However, it also has negative impacts, including the decrease of environmental quality such as air, soil, and noise, as well as the potential for spontaneous combustion. The research was conducted to assess the technical and economic aspects of environmental management at coal stockpiles in the Tarahan Port Unit of PT Bukit Asam Tbk to support environmental sustainability. The technical assessment of stockpile environmental management was carried out by comparing observation results with the Environmental Management and Monitoring Plan Document (RKL/RPL) and Indonesia’s applicable Environmental Quality Standards. The economic assessment focused on the cost of environmental monitoring and management by observing the discrepancies between the planned and realization in the first and second quarters. The technical assessment results show that environmental management at the stockpile has been implemented effectively. Air quality parameters and noise levels remain below the established standards, soil quality is classified good as indicated by vegetation growth, and no spontaneous combustion occurred during the observation period. The economic assessment revealed a discrepancy of 2.02% between the planned cost of IDR 121,183,548 to the actual realization of IDR 123,641,668. This increase was attributed to the construction of a dust reduction system and an operational chimney for the 2X8 MW Steam Power Plant, through the use of Electrostatic Precipitators. The study recommends a detailed inventory of environmental cost plans and potential cost escalation to anticipate risk factors. It also highlights the need for regular maintenance of machines that are known to frequently produce emissions. These efforts are expected to reduce the emissions and lower the costs of environmental management and monitoring.

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