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Jurnal Mineral
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Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung
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INDONESIA
MINERAL
Published by Universitas Bangka Belitung
ISSN : 25407708     EISSN : 2620729X     DOI : https://doi.org/10.33019/mineral.v6i2
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology
The scientific journal called MINERAL is a scientific periodical publication of Mining Engineering Department , Bangka Belitung University, which is published every April and October in a year which the scope of Exploration (Geology and Geophysics), Geotechnical / Geomechanics, Minerba Processing, Minerba Management and Economics, Mining Environment, Reclamation and Post-Mining. This journal collaborates with Association of Indonesian Mining Professionals (PERHAPI) Center and Forum Komunikasi Program Studi Teknik Pertambangan se-Indonesia.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 172 Documents
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Kajian Teknis Flyrock Dan Jarak Aman Minimum Peledakan Di Jobsite PT Unggul Dinamika Utama Site PT Indexim Coalindo: Flyrock Technical Study and Minimum Safe Distance for Blasting at PT Unggul Dinamika Utama's Jobsite at PT Indexim Coalindo's Site Indra, M Alfarie; Franto; Guskarnali
MINERAL Vol 10 No 1 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/bwj5jg83

Abstract

This study examines the condition of flyrock and safe blasting distance at the jobsite of PT Unggul Dinamika Utama-PT Indexim Coalindo in East Kutai, East Kalimantan. The study was conducted at Pit Tempudo 6 by collecting blasting geometry data and actual flyrock points using GPS as many as 30. The research method used was the actual calculation of flyrock throwing distance using Pythagoras and the predicted calculation of flyrock throwing distance using the theory of Richard and Moore and Ebrahim Ghasemi which was then carried out a technical study of flyrock and minimum safe blasting distance. The processing results showed the use of an average blasting geometry with a burden value of 7.86m, spacing of 8.96m, stemming of 3.64m, blast hole depth of 7.05m, powder column of 81.64kg with the furthest actual flyrock distance of 90.3m. The influence of blasting geometry parameters obtained a burden value of 0.01%, spacing of 0.86%, Stemming of 18.09%, blast hole depth of 6.38%, powder column of 2.21%. Stemming has a high influence on flyrock, with a percentage of 18.09%. Additional factors such as inadequate site preparation and insufficiently dense stemming also contribute to flyrock. Theoretical predictions after the calculated data were transformed showed that the Richard and Moore cratering factor method had the closest results, at 24%, compared to Ebrahim Ghasemi's 29%. Based on technical studies, the recommended safe radius is 181 m for heavy equipment, while for humans it remains at 500 m.
Kajian Kelayakan Jalan Angkut Menggunakan Metode AASHTO, Unsurfaced Road Condition Indeks dan California Bearing Ratio di PT Mandala Karya Prima, Kalimantan Utara: Feasibility Study of Transport Roads Using AASHTO Method, Unsurfaced Road Condition Index, and California Bearing Ratio at PT Mandala Karya Prima, North Kalimantan Silaban, Cindy Grestina; Andini, Delita Ega; Harsiga, Edwin
MINERAL Vol 10 No 1 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/93fsva56

Abstract

PT Mandala Karya Prima is facing challenges due to damage to the roadway that has caused a decline in travel hauler performance, resulting in unmet overburden production targets. The purpose of this research is to evaluate and recommend road geometry based on AASHTO methods, transport road quality based on URCI values, and transport road bearing capacity based on CBR testing using the DCP tool. The width of the straight road ranges from 26 to 47 meters, and 22 meters on curved roads. The road grade varies from 1.666% to 10.041%, and the cross slope is not formed. The superelevation is 0.0156 m/m with a curvature radius of 30.387 meters. The quality value of the transport road on Jl. Jati STA 200 – 1700 is 51-73 with a Good rating on the dry loading lane and on the post-rain loading lane with a value of 39-67 and a Fair rating. Meanwhile, the URCI value on the empty lane with dry conditions is 59-77 with a Good rating, and on the empty lane under post-rain conditions, it has a Good rating with values ranging from 32-69. The varying CBR values range from 18.1% to 31%, with an average of 25.6%, which is still below the required standard of 36.23%. Recommendations that can be made for improving access roads include road widening, spoil relocation, reformation of drainage, road material backfilling, use of graders and compactors, and patching at several points.
Evaluasi Safety Maturity Level Dengan Metode Saaty Di Tambang PT Mitra Stania Prima, Desa Cit/Mapur Kabupaten Bangka.: Evaluation of the Safety Maturity Level Using the Saaty Method at PT Mitra Stania Prima Mining Site, Cit/Mapur Village, Bangka Regency Lingga, Yesi Crystiyanti Hangelina Br; Franto; Harsiga, Edwin
MINERAL Vol 10 No 1 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/96mbh329

Abstract

This study aims to evaluate the Safety Maturity Level within the mining industry using the Analytical Hierarchy Process (AHP) method developed by Saaty, allowing for objective and systematic prioritization of influencing factors. A case study was conducted at PT. Mitra Stania Prima, a tin mining company, with the assessment framework referring to the Decree of the Director General of Mineral and Coal No. 10.K/MB.01/DJB.T/2023 concerning the measurement of mining safety maturity levels. The evaluation considered four key indicators: Worker Participation (weight: 0.134, categorized as Proactive), Responsibility of Work Unit Leadership (weight: 0.296, Proactive), Accident and Occupational Disease Statistics and Analysis (weight: 0.164, Planned), and Control Efforts (weight: 0.216, Planned). The results indicate that PT. Mitra Stania Prima achieved a total score of 0.806, placing it at Level 4 (Proactive) on the Safety Maturity Level scale. The most influential factor was the Responsibility of Work Unit Leadership (eigenvalue: 0.44), followed by Control Efforts (eigenvalue: 0.39). It can thus be concluded that the company's current safety maturity is categorized as Proactive, with a final score of 0.81. To achieve the highest level, Resilient (score of 1.00), the company is advised to improve by 0.09 points by strengthening critical aspects, including addressing safety audit findings, digitalizing safety documentation, and involving third-party vendors in enhancing overall safety maturity.
Pengukuran Volume Overburden Menggunakan UAV di Pit 3HWE PT Indominco Mandiri: Measuring Overburden Volume Using UAV at Pit 3HWE PT Indominco Mandiri Sendana, Aprianto Aris; Magdalena, Henny; Devy, Shalaho Dina; Trides, Tommy; Respati, Lucia Litha
MINERAL Vol 10 No 1 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/vjs1rh30

Abstract

This study aims to measure the overburden volume at Pit 3HWE, PT. Indominco Mandiri using Unmanned Aerial Vehicle (UAV) technology. The use of UAV for volume measurement offers a more efficient and accurate alternative compared to conventional methods. In this research, aerial images were captured using a UAV and processed with photogrammetry software to generate a digital surface model (DSM) and 3D maps. The overburden volume calculations were analyzed and compared with manual measurement data as a reference. The results indicate that UAV usage provides accurate results with higher time efficiency, making it a viable method for mining operations. Factors affecting the measurement results, such as weather conditions and image resolution, were also analyzed in this study.
Pertambangan Timah Inklusif dan Berkelanjutan di Belitung Timur dengan Analisis Promethee: An Analysis of Inclusive and Sustainable Tin Mining in East Belitung Using the PROMETHEE Method Nursalam, Ruddy; Yusuf, Maulana; Asngari, Imam
MINERAL Vol 10 No 2 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/kpc17n52

Abstract

This paper discusses the potential of tin mining in the IUP Laut DU 1562 area in East Belitung Regency. However, this potential is difficult to realize due to regulatory constraints, especially after the Bangka Belitung Province ratified Regional Regulation Number 3/2020 regarding RZWP3K which does not include this area as a mining area, but a fishing zone. Therefore, an inclusive and sustainablity study is needed for the utilization of marine space to provide benefits for the country, local governments, society, and minimize environmental impacts. In this study, PT Timah TBK conducted data and information collection stages and analysis stages, including discussions with related stakeholders, direct observations in the field, and related official documents. The result of this study is the development of three development scenarios, namely inclusive tin mining, exclusive tin mining, and non-tin mining. These scenarios are then analyzed using the Promethee method to produce policy recommendations.
Analisis Kebutuhan Alat Muat dan Alat Angkut untuk Perubahan Shift Kerja pada Quarry Batugamping PT X, Jawa Barat: Analysis of Loading and Hauling Equipment Requirements for a Shift Work Change at a Limestone Quarry PT X, West Java Seprizal, Muhammad Faisal; Yanottama, Andy; Permadi, Dimas Agung; Navtalia, Zella; Agustine, Diah Wully
MINERAL Vol 10 No 2 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/h0ejr004

Abstract

PT X is a company engaged in the limestone mining sector and simultaneously serves as a cement supplier. The company plans to transition from a three-shift work schedule to a two-shift system. This decision is driven by the increasing costs associated with mining, safety concerns, and time losses due to equipment maintenance, following various evaluations conducted by the company's management. This research aims to analyze the requirements for loading and transportation equipment necessary to achieve an annual production target of 4,500,000 tons after the implementation of the two-shift work schedule. The research methodology employed is quantitative, encompassing the collection of both primary and secondary data, as well as an analysis of equipment productivity. The findings indicate that to maintain the production target, it is essential to replace the current loading equipment from the CAT 988B wheel loader to the CAT 990H wheel loader. Additionally, adjustments to the number of equipment are required, including two units of the CAT 990H wheel loader and seven units of the CAT 773 dump truck for Crusher 1, as well as two units of the CAT 992K wheel loader and eight units of the CAT 777D dump truck for Crusher 2. The production capacity of this equipment configuration reaches 4,575,457 tons per year, demonstrating that the production target can be optimally met despite the reduction in the number of work shifts.
POTENSI LOGAM TANAH JARANG DI DALAM ABU BATUBARA: POTENTIAL OF RARE EARTH METALS IN COAL ASH Purbasari, Diana; Pebrianto, Rosihan; Harsiga, Edwin
MINERAL Vol 8 No 2 (2023): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i2.4364

Abstract

Coal is a fossil fuel that is still used as fuel for Steam Power Plants (PLTU). The greater the demand for electrical energy, the greater the need for coal to meet the fuel needs of the PLTU. The combustion of PLTU produces combustion residue in the form of fly ash and solid ash. Fly ash has its own problem level compared to solid ash. The issue of air pollution, sources of disease and radioactive pollutants are the negative impacts of fly ash left over from burning coal. Coal ash is formed from compounds that do not burn in the coal combustion process including the presence of rare earth metals (LTJ). LTJ is a valuable element which in certain levels can be processed into valuable goods. Separation of LTJ in coal can reduce the ash content and improve the quality of coal, so it is necessary to know the potential of LTJ contained in coal ash. The coal sample tested was coal from PT Bukit Asam Tanjung Enim Mining Unit. Identification of LTJ elements in the ash at the PLTU using XRD, ICP and SEM analysis. There is element Cerium (Ce) 55.3 ppm in fly ash and 22.6 ppm in bottom ash, element yttrium (Y) 36 ppm in fly ash and 10.7 ppm in bottom ash, element Lanthanum (La) 27.3 ppm on fly ash and 10.5 ppm on bottom ash. Neodymium (Nd) 26.1 ppm in fly ash and 6.9 ppm in bottom ash. Finally, there is an element of Samarium (Sm) 1.4 ppm in fly ash and 0.7 ppm in bottom ash. There is a promising potential for rare earths in coal ash, but for levels below 500 ppm it is still not feasible to manage, so it is necessary to enrich the rare earths first.
Pengaruh Pre-roasting Terhadap Kinetika Leaching Fe dari Laterite Tipe Limonite: Effect Of Pre-roasting On Fe Leaching Kinetics from Limonite-Type Laterite Prameswara, Gyan
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.4567

Abstract

Extraction of valuable metals from laterite is intensified. The scarcity of sulfide sources containing high Ni and the use of pyrometallurgical processes with high capital costs are important reasons to initiate extraction of valuable metals from oxide minerals such as laterite and hydrometallurgical processes such as leaching. In this study, the effect of pre-roasting of limonite type laterite on Fe leaching kinetics parameters was observed. Roasting was carried out at 280 °C and 610 °C to transform the geotite phase into hematite and dehydroxylate Mg-Si associated minerals. Roasting was carried out for 4 hours in a muffle furnace. Non-roasted and roasted ore were then leached at a temperature range of 30-90 °C at a time variation of 0 to 240 minutes using sulfuric acid at a concentration of 2M, S/L ratio of 10 g/100 mL, and rotating speed of 200 rpm. Roasted ore (280 °C) showed better leaching performance than non-roasted ore while increasing the roasting temperature to 610 °C did not provide a significant increase in Fe recovery. Kinetic parameters such as activation energy (EA) and frequency factor were also reduced by using roasted ore. An EA value of 31.66 kJ/mol was obtained in the leaching process using 280 °C roasted ore. The leaching process is confirmed to be controlled by diffusion through the product layer with the following kinetic equation kt=31.59 exp (-31.66/(RT))t=1-2/3X-(1-X)^(2/3).
Optimalisasi Waktu Hambatan Excavator Untuk Mencapai Target Produksi Batubara Pit C CV Kutai Kumala Energy: Optimization Losstime of Excavator to Achieve Coal Production Target at Pit C CV Kutai Kumala Energy Magdalena, Henny; Saksono, Fransiska Yuniari
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.4677

Abstract

The barriers on the activity causes losstime. The losstime of excavator that so high cause coal production targets not to be achieved. Therefore efforts are made to improve the losstime. The analysis of multiple linear regression multivariate is used as a problem solving approach, namely finding the maximum limit of idle time and delay time and formulating the optimal losstime. Based on observations of the idle time and delay time of two excavator units operating in the morning shift, the regression equation is obtained Y = 1832.782 – 95.134X1. The equation of optimal losstime is X2 = -0.8729X1 + 10.71. The simulation is carried out based on the average actual data, the maximum idle time limit of 6.67 hours and a delay time of 4.89 hours. For an idle time of 4.45 hours, it is expected that the delay time will not exceed 6.83 hours in order to achieve the production target. The causes of unfulfilled of production were include rain, landslides, breakdown units, slippery, operator needs and et cetera.
Perancangan Perancangan Dan Penjadwalan Penambangan Tahun 2023 Di Pit 3 PT. Mutiara Fortuna Raya 180 Kabupaten Muaro Jambi: Design And Mining Scheduling In 2023 At Pit 3 PT. Mutiara Fortuna Raya 180 Muaro Jambi District putra, brian khurohmad; Yulanda, Yudi Arista; Prabawa, Aditya Denny
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.4691

Abstract

PT Mutiara Fortuna Raya's mining operations are currently guided by an annual mining design without detailed mining scheduling. However, variations in mining direction and sequence can lead to discrepancies in coal expose achievement, ultimately impacting coal production outcomes. High SR locations demand a more overburden volume and time. This research aims to evaluate various mining direction options to determine the most optimal approach. The research methodology uses a quantitative approach, comparing three mining scheduling scenarios: panel scenario, strip scenario, and block scenario. These scenarios are based on the 2023 reserve design results of 180,518 tons coal and 385,390 BCM of overburden. The outcomes of these three scenarios reveal varying stripping ratios across each period. Stripping ratio for the panel scenario: Quarter I SR 10.84, Quarter II SR 4.77, Quarter III SR 1.64, and Quarter IV SR 0.20. Stripping ratio for the strip scenario: Quarter I SR 5.11, Quarter II SR 2.40, Quarter III SR 1.67, and Quarter IV SR 0.53. Stripping ratio for the block scenario: Quarter I SR 8.93, Quarter II SR 3.10, Quarter III SR 1.74, and Quarter IV SR 0.21. Analysis of three scenarios indicates that block scenario presents the most favorable schedulling for implementation.

Page 16 of 18 | Total Record : 172

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