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INDONESIA
INTAN Jurnal Penelitian Tambang
Published by Universitas Papua
ISSN : 26553473     EISSN : 27232727     DOI : https://doi.org/10.56139/intan.v4i2.85
Core Subject : Economy, Science, Engineering,
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering
Fokus dan lingkup Jurnal INTAN adalah Pertambangan baik dalam pengelolaan dan pengusahaan mineral atau batubara yang meliputi eksplorasi, konstruksi, penambangan, pengolahan dan/atau pemurnian atau pengembangan dan/atau pemanfaatan, pengangkutan dan penjualan, kegiatan reklamasi dan pascatambang, kebijakan-kebijakan ekonomi, lingkungan, dan sosial di bidang pertambangan mineral dan batubara. Jadi Jurnal Intan merupakan media untuk menyalurkan pemahaman tentang aspek-aspek sains, teknologi, ekonomi, sosial dan lingkungan dari dunia pertambangan berupa hasil penelitian lapangan atau laboratorium maupun studi pustaka.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 130 Documents
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GLOBAL GOLD PRICE VOLATILITY AND ITS CORRELATION TO RESOURCE AND RESERVE DYNAMICS AT PT MERDEKA COPPER GOLD TBK Utari Retno Sulistyo Rini; Fanteri Aji Dharma Suparno; Siti Aminah; Haeruddin
INTAN Jurnal Penelitian Tambang Vol. 8 No. 2 (2025): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v8i2.346

Abstract

Gold (Au) commonly occurs as nuggets or grains in rock veins and alluvial deposits. Because of its scarcity, chemical stability, and distinctive properties, gold commands higher market prices than base metals. Global gold price volatility has a significant impact on the strategic decisions of mining companies. This study aims to quantify the correlation between international gold price fluctuations and the dynamics of gold resources and reserves at PT Merdeka Copper Gold Tbk. Using a quantitative approach, the average gold prices and the company's annually reported resource and reserve figures were analyzed. The Pearson correlation coefficient was employed to measure the strength and direction of the relationship. The results reveal a robust and statistically significant negative correlation. This inverse relationship suggests that periods of high price volatility are associated with a decrease in the company's reported gold resources and reserves. The findings highlight the significant impact of external market dynamics on resource management. It is recommended that stakeholders incorporate market volatility forecasts into long-term strategic planning and resource valuation models to enhance resilience.
GEOGRAPHIC INFORMATION SYSTEM (GIS) APPLICATION FOR MAPPING INFRASTRUCTURE AND TOURISM POTENTIAL IN MANSINAM VILLAGE Karubaba, Andrew Federico; Kainama, Agus; Yemima, Hulda; Tinungki, Sheila Maria; Ainun, Annisa Nur; Behuku, Azazia; Dora, Syeli Patricia Cleo; Sabandar, Ofel Yakhin
INTAN Jurnal Penelitian Tambang Vol. 8 No. 2 (2025): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v8i2.333

Abstract

This study aims to provide accurate spatial data to support ecotourism planning in Mansinam Village through the application of a Geographic Information System (GIS). Field data acquisition was conducted using a handheld GPS to record the coordinates of infrastructure and tourist attractions. The data was then processed in ArcGIS software through the stages of georeferencing, digitization, overlay analysis, and thematic map creation. This follows spatial mapping standards commonly used in geological mapping and spatial analysis activities in the mining sector. This study produced two thematic maps: a Settlement Map and a Map of Tourist Attraction Locations in Mansinam Village. Both maps provide spatial information on settlement locations, accessibility levels, and the distribution of natural, cultural, religious, and historical tourist attractions. The spatial analysis demonstrates the relationship between accessibility and tourism development potential, while also identifying locations requiring infrastructure improvements. In addition to contributing to tourism planning, the mapping process used also demonstrates methodological alignment with geological mapping and spatial analysis practices commonly used in the mining sector. The findings of this study are expected to provide an empirical basis for local governments and stakeholders in formulating more targeted and sustainable regional development strategies.
PREDICTION OF SETTLEMENT AND LAND USE CHANGES ON MANSINAM ISLAND FROM 2025 TO 2031 USING THE CELLULAR AUTOMATA SIMULATION METHOD Valderama, Aldi Fariz; Taplo, Yulianto; Riansyah, Ardi; Habibi, Syavitra L. P.; Siagian, Adi Frianda; Popoi, Taufik Syahrul; Nasir, Muh. Irwana Segara; Iba, Amos; Laitupa, Karmila
INTAN Jurnal Penelitian Tambang Vol. 8 No. 2 (2025): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v8i2.337

Abstract

Indonesia, as an archipelagic country, faces development challenges on its small islands, including Mansinam Island. This study aims to predict settlement and land cover changes on Mansinam Island for the period 2025–2031. The data used were surface reflectance-corrected Sentinel-2 imagery with a spatial resolution of 10 meters. The imagery was acquired in 2019, 2022, and 2025. Land cover classification was performed using a supervised classification method with the minimum distance algorithm, achieving an accuracy of 87.82%. Land change prediction modeling was carried out through land use change analysis and simulation using the Cellular Automata (CA) and Artificial Neural Network-Cellular Automata (ANN-CA) models. The model produced a Percent of Correctness of 89.96%. The simulation results indicate that from 2025 to 2031 there will be no significant land change, with transformed land areas of 43.85 ha in 2025, 42.62 ha in 2028, and 42.64 ha in 2031. The results also show that the development rate on Mansinam Island tends to slow down.
DESIGN OF PIT X BASED ON PRODUCTION TARGETS USING MINE SCHEDULING CONCEPT AT PT Y Ismail, Ardhan; Mochamad Gaharu Dida Devedo; Pontus, Albertus Juvensius; Thomas , Anita oktoviana L.P.G.M.
INTAN Jurnal Penelitian Tambang Vol. 8 No. 2 (2025): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v8i2.349

Abstract

Pit design in surface mining requires a systematic approach that considers operational capacity and efficiency to ensure optimal production target achievement. In the actual condition of the second quarter of 2025, pit X design at PT Y was carried out manually using a trial-and-error method. This method was time-consuming and less flexible to parameter changes, and caused significant deviations from production targets, with overburden reaching 110%, coal only 89%, and stripping ratio increasing to 4.19 from the target of 3.39. This study aims to develop pit design based on Mine Scheduling Concept using SPRY Scheduler software to improve operational effectiveness and efficiency. An applied quantitative method was implemented by integrating reserve data from Minescape, heavy equipment parameters including availability, utilisation, and hourly rate, as well as a mining calendar aligned with operational conditions in the third quarter of 2025. The results show that the generated pit design achieves production targets with very high accuracy: overburden of 4,093,991 Bcm with a deviation of -0.02%, coal of 1,206,663 MT with a deviation of 0.00%, and a stripping ratio of 3.39 as targeted. The application of SPRY Scheduler produces measurable, accurate, and adaptive pit designs without trial-and-error processes, supporting efficient and sustainable mine planning.
PERFORMANCE ANALYSIS AND MAINTENANCE STRATEGY OF THE SANY SW955K1 WHEEL LOADER AT PT SUMBAWA BETON Risal Gunawan; Miranti Nur Wulandari; Nia Karuniawati
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.343

Abstract

A wheel loader is a piece of heavy equipment that plays an important role in the transfer of aggregate materials in ready-mix concrete production. Suboptimal equipment performance can reduce work efficiency and disrupt the production process if it is not supported by robust maintenance management. This study aims to analyze the operational performance and maintenance strategy of the Sany SW955K1 wheel loader at PT Sumbawa Apsara Beton, West Sumbawa Regency. The research adopted a descriptive quantitative approach, drawing on field observations, interviews with operators and mechanics, and company documentation. The analysis was conducted based on cycle time, effective working time, and work efficiency parameters. The results show that the Sany SW955K1 wheel loader has an average cycle time of 37.12 seconds with a work efficiency level of 71%. Total operational delays reached 137 minutes, of which 111.5 minutes were avoidable delays such as operator tardiness and unmanaged breaks. Through the implementation of consistent preventive maintenance, improvement of operator skills, the use of genuine spare parts, and regular equipment performance monitoring, avoidable delays could potentially be reduced by 50%. This intervention could extend the effective working time from 333 minutes to approximately 388.75 minutes per day, raising work efficiency to around 83%. Consequently, equipment productivity is projected to increase by 16–17% while concurrently reducing idle time and operational costs.
ESTIMATE COAL RESOURCES IN BLOCK 3 KEBAN SOUTH SUMATERA USING USGS CIRCULAR 891 Deni Mildan; Michael Johan; Hafid Zul Hakim; Edo Kharisma Army; Alicya Inmas Mauladika
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.370

Abstract

Coal resource estimation represents critical phases within the mining life cycle, and fundamentally determines both the technical feasibility and economic viability of a project. However, coal resource estimation is often hindered by uncertainties caused by data variability, geological heterogeneity, and limited subsurface information. Therefore, a method capable of addressing uncertainties in the estimation process is necessary. The research was conducted in Block 3 Keban, Lahat, South Sumatra, with moderate geological conditions. This study employed the circular USGS method to estimate the coal resources based on the distance of known information points and geological confidence level. This methodology operates by establishing distinct circular areas of influence around 13 drillholes: 250, 500, and 750 meter radii for measured, indicated, and inferred categories, respectively. The resource classification results indicate a total estimated coal tonnage of 17.44 million tons for the measured category, 47.61 million tons for the indicated category, and 91.75 million tons for the inferred category. Despite the substantial cumulative volume identified, the overall geological confidence remains relatively low due to the high proportion of resources in the Inferred category. Therefore, an intensified exploration program, specifically infill drilling, is necessary to increase borehole density and enhance the validity of the geological model. These results are expected to provide a reference framework for future exploration and mining strategy planning.
CONTRASTING LATERITIC NICKEL ORE CHARACTERISTICS IN EASTERN INDONESIA: THE URGENCY OF SHIFTING FROM RKEF TO HPAL Renny Cahyaningtyas; Nurkhamim; Eddy Winarno
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.371

Abstract

While Indonesia holds a strategic position in the global electric vehicle (EV) supply chain, with 19.16 billion tons of nickel resources, this dominance is threatened by a critical mismatch between geological realities and the downstream industrial structure. This paper analyzes the disparity within the national ore balance and assesses the urgency of transitioning processing technologies to secure long-term sustainability. Using an economic geology approach, we conducted a geometallurgical characterization of regional deposits (Sulawesi, Maluku, Papua) and a mass balance analysis based on the 2025 Mineral Resource and Reserve Balance. Findings indicate that 58% of national resources are limonite (Ni <1.5%) and are predominantly located in Eastern Indonesia (Maluku and Papua). Crucially, these eastern limonite profiles are enriched in cobalt, scandium, and a comprehensive spectrum of rare earth elements (REE). In stark contrast, the industry remains heavily skewed toward pyrometallurgy (RKEF) for producing intermediate stainless steel products, resulting in massive consumption of saprolite ore (Ni ≥ 1.5%). Reserve life projections indicate that high-grade saprolite could be depleted within eight years at current extraction rates. Consequently, this study advocates for a moratorium on RKEF expansion and accelerated investment in hydrometallurgy (HPAL). This strategic pivot toward Class I nickel production is imperative to valorize the massive limonite inventory and underpin the national EV battery ecosystem. Furthermore, this paper emphasizes that the HPAL transition must be tightly coupled with robust environmental, social, and governance (ESG) practices to mitigate ecological risks, particularly regarding tailings management and biodiversity protection in fragile small-island environments.
COMPARATIVE ANALYSIS OF BLAST GEOMETRY EFFECTS ON FRAGMENTATION, PRODUCTION, AND BLASTING COST IN ANDESITE MINING AT PT. SULENCO WIBAWA PERKASA Mansidi; Syahrudin; Murad
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.385

Abstract

Suboptimal blasting is often the primary cause of failing to achieve production targets and escalating operational costs in quarry mining. This study aims to provide recommendations for blasting geometry and optimal cost estimates to achieve <40 cm fragmentation of 85% and support the production target of 50,000 bcm/year at PT. Sulenco Wibawa Perkasa, West Kalimantan. The research employed a quantitative approach using a comparative method, comparing three blasting geometry designs (R.L. Ash, C.J. Konya, ICI-Explosives) against actual field geometries from five blasting events conducted during July–August 2024. Fragmentation predictions were performed using the Kuz-Ram model. The results showed that the actual geometry had a powder factor of 0.89 kg/m³, significantly above the normal range for andesite (0.4–0.6 kg/m³). The proposed ICI-Explosives Design 2 proved to be the most optimal, yielding fragmentation of 85.19% passing <40 cm (meeting the 85% target), a production volume of 2,488 bcm per blast (exceeding the 2,100 bcm target), and a powder factor of 0.54 kg/m³ (39% more efficient than the actual operation). The cost per bcm for this design was Rp38,080, representing a 38% reduction compared to the actual cost (Rp61,567/bcm). The study concludes with a recommendation for the ICI-Explosives Design 2 geometry comprising: 6 m borehole depth, 2.4 m burden, 2.4 m spacing, 0.6 m subdrilling, 5.4 m bench height, 1.6 m stemming, 4.4 m charge column length, and 80 blast holes per shot, at a cost of Rp94,740,215 per blast or Rp1,184,253 per blasthole
SEPARATION OF MAGNETIC AND NON-MAGNETIC MATERIALS FROM KAMPUNG MUBRAIDIBA BEACH SAND USING A PROTOTYPE MAGNETIC SEPARATOR Rustam Kamoda; Hellydorus Payangan; Andrew Federico Karubaba
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.386

Abstract

This study is undertaken in response to the potential of beach sand in the coastal area of North Manokwari, West Papua, which contains magnetic materials; however, its utilization remains limited due to the lack of simple and applicable separation technologies. This study aims to evaluate the effectiveness of a prototype magnetic separator and to analyze the effect of belt speed variations on recovery and enrichment ratio (ER). The research employed a laboratory-based experimental method with a quantitative approach, using sand samples collected from Mubraidiba Village. Experiments were conducted at four belt speed variations (25.57, 38.22, 63.11, and 82.37 m/min), each performed in triplicate. The results indicate that belt speed significantly influences separation performance. The highest recovery (97.04%) was achieved at 25.57 m/min, while increasing belt speed reduced recovery to an average of 18.76% at the highest speed. Conversely, the ER increased with increasing belt speed, indicating an inverse relationship between recovery and concentrate grade. These findings demonstrate that belt speed is a critical operational parameter that should be adjusted according to processing objectives. Furthermore, the developed prototype exhibits promising performance as a simple and practical alternative for magnetic separation technology.
NICKEL RESOURCE ESTIMATION BASED ON COG AT PIT 10 BLOCK B2 OF PT ANUGRAH HARISMA BARAKAH elsa Putri; Erwin Anshari; Marwan Zam Mili
INTAN Jurnal Penelitian Tambang Vol. 9 No. 1 (2026): INTAN: Jurnal Penelitian Tambang
Publisher : Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v9i1.389

Abstract

PT. Anugrah Harisma Barakah is a mining company operating in Pongkalaero Village, South Kabaena District, Bombana Regency, Southeast Sulawesi Province. The company operates under a Mining Business License (IUP) covering approximately 2,527 ha. Currently, the company plans to open a new pit, namely Pit 10 in Block B2, covering approximately 10 ha. This study aims to determine the amount of laterite nickel resources based on the Cut-Off Grade (COG) at Pit 10 Block B2. The research employed a quantitative approach combining theoretical concepts with field data from exploration activities. The Ordinary Kriging (OK) method was selected based on the Coefficient of Variation (COV) value of 0.77, indicating moderate data variability, and was supported by variogram analysis capable of describing the spatial continuity of nickel grade distribution. Fault structures were also identified, which significantly influence the profile and formation process of laterite nickel deposits. The total resource volume at Pit 10 Block B2 based on COG estimated at 852,812 m³, with a total tonnage of 1,451,696 tons and an average nickel grade of 1.76% Ni.

Page 13 of 13 | Total Record : 130

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