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MINERAL

mineral
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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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Pengaruh Fragmentasi Hasil Peledakan Batugranit Terhadap Produktivitas Hopper Crusher Di PT Bumi Warna Agung Perkasa Desa Air Mesu Kabupaten Bangka Tengah Bobby Bagaskara; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 3 No 2 (2018): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The destroyed process or to split the rock with blasted system have effective value and good economic compared with mechanical tools method. Blasted activity effective become is anothere standard the success of activity loading processing to influence achievement targets of mining productivity. This research aim to increasing the productivity hopper crusher baited rate and minimize total percentage of boulder, so that material reduction activity in hopper crusher become was more effective. The study was on 14 blasted is project from PT Bumiwarna Agung Perkasa. Data this research consist of geometry, blasted fragmentation, cycle time loading hopper. This research used method with geometry an estimates used R.L.Ash method with fragmentation analysis used Kuz-Ram and image analysis. From analysis data there is actual fragmentation 74.680% base on Kuz-Ram and 64.942% base on image analysis with an actual boulder total Kuz-Ram 25.320 % and 35.057% base on image analysis, with result the average time reduction 8.21 minute and an average productivity 131.80 m3/hour. It is minimize total percentage of boulder, needed to revise blasted geometry based on R.L. Ash theory with reduction boulder size >80 cm by 12.042% with keep the target volume production 40026.8 BCM. It is productivity hopper crusher may work better.

Evaluasi Kualitas Batubara dari Front Penambangan Hingga Stockpile di Pit 1 Banko Barat PT Bukit Asam Tbk Tanjung Enim Inda Pratama Putri; Janiar Pitulima; Mardiah Mardiah
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Mining Pit 1 Banko Barat in Bukit Asam is a mining location that used open pit system of mining. Coal quality is an important part of the mining industry, because it's related directly to coal marketing. Coal sampling test process which determine quality prove that quality in front mining and stockpile is decreasing from recent month with 4903 Kcal/kg. The decreasing in quality will also result in price reduction. Based on that condition, evaluation of coal sampling quality test result needs to be done to discover the cause of quality decreasing, so that various efforts can be made to increase quality to match the price standard. Research method using proximate and ultimate analysis for coal quality. There are 20 coal samples used in the front, 24 samples in stockpile and 8 samples in temporary stockpile. Coal quality in front mining has 28.24% total moisture, 13.8% inherent moisture, 2.11% ash content, 33.81% volatile matter, 35.98% fixed carbon, 0.42% total sulphur and 4,987.5 kcal/kg. Coal quality in stockpile has 28.35% total moisture, 14.26% inherent moisture, 3.73% ash content, 33.87% volatile matter, 34.09% fixed carbon, 0.41% total sulphur and 4,908.5 kcal/kg. Irrelevance factor is caused by water puddle, mining process, coal cumulation that stays too long in temporary stockpile and spontaneous combustion. Efforts that can be done to handle irregularities are drainage system and pump additions, mining process optimization, FIFO management system implementation and spontaneous combustion handling.

Identifikasi Penyebaran Zona Mineralisasi Endapan Timah Menggunakan Metode Induksi Polarisasi Konfigurasi Dipole - Dipole Di Bukit Sambunggiri Kecamatan Merawang Kabupaten Bangka Rafi Sasena; Guskarnali Guskarnali; Delita Ega Andini
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Tin is one of the many mining products found in the Bangka Belitung Islands region. Geophysical exploration was carried out in the Bukit Sambunggiri area, Merawang District, Bangka Regency using the dipole-dipole configuration polarization to detect polarizationel ectricity on surface of metal material and induction method to identify the distribution of tin deposit mineralization. The parameters is measuring area of 21 Ha with 6 tracks, length A, B, C is 640 meters, D, E, F is 840 meters, spacing between tracks 50 meters, spacing between electrodes 10 meters and equipment used is Multy Channel RS / IP Supersting. Processing measurement data using Res2dinv software to create 2D cross sections and Montaj Oasis for 3D cross sections. The results of resistivity and chargeability data processing of a total of six trajectories have 3 trajectories which have a clear mineralization area, that is, A trajectory is assumed to be at a distance of 250 - 350 meters and depths from 0 - 50 meters which are characterized by medium-high chargeability - 30) msec and low resistivity (<700) Ohm.m. On track D, it is estimated that there are three parts at a distance of 100 - 220 meters in depth of 50-50 meters, distance of 335 - 440 meters in depth of 50-130 meters and distance of 590 - 680 meters in depth of 50-130 meters. 430 meters at a depth of 0 - 150 meters. The results of interpretation of track A to track C are suspected to have zones of tin mineralization with secondary deposits and it is known that the mineralized zone is thought to be located below the bog iron zone with secondary tin deposits. This is due to the fact that the bog iron is hard rock like granite which is oxidized, so minerals that have a high level of resistance to weathering such as cassiterite and quartz will be released from the rock body and deposited in the lower layer. While path D to trajectory F is suspected to be the continuation of the zone of tin mineralization with primary deposits. This is presumably because the location of the mineralization area spreads between intrusion of granite rocks which have a high chargeability and resistivity value.

Kajian Produktivitas Alat Gali Muat dan Alat Angkut dari Pit 1 untuk Pengangkutan Batu Granit di PT Aditya Buana Inter Desa Jurung Kecamatan Merawang Eko Eko Pryatna Gaol; Janiar Pitulima; Alfitri Rosita
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The mining industry sector is an important sector for Indonesia's development (Prasetya and Ernest, 2013). PT Aditya Buana Inter, hereinafter abbreviated as PT ABI, is one of the mining companies that utilize natural resources in the form of rock mining (article 34) Law No. 4 (2009), in this case granite and began mining activities in 2002. The main activities in granite mining consist of stripping the overburden, drilling, blasting, dismantling, loading and transporting to the processing unit (crushing plant) with the distance from the mining front to the processing unit namely ± 1.7 km. Area of 40 Ha Mining Business Permit is located in Jurung village. The granite mining activities carried out by PT ABI are carried out with an open-pit mining system. Based on the PT ABI work plan for the production target of transporting granite in January 2018 is 13,000 BCM, while the actual production is only 9,085 BCM with unattainable 3,915 BCM. The percentage of granite stone production reaches 69% of the work plan target. The cause of not achieving the production target value set by PT ABI can be influenced by several factors, one of which is the ineffective amount of work time wasted. ncreased work efficiency is done by making improvements to avoidable obstacles so that the working efficiency of the loading and excavating tool has increased from 75% to 78% and transportation equipment from 70% to 77.6% with production to 11,139 BCM. Addition of transportation equipment for 1 unit match factor so that it reaches the target of 13,000 BCM

Evaluasi Keserasian Kerja Alat Gali Muat dan Alat Angkut Guna Pencapaian Target Produksi Batugamping 350.000 ton/bulan pada Pit 242 Bukit Karang Putih PT Semen Padang (Persero) di Kecamatan Lubuk Kilangan Sumatera Barat M.Arief Adilah; E.P.S.B Taman Tono; Delita Ega Andini
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The tendency of increasing demand for limestone as one of the raw materials for making cement, it is necessary to have appropriate mining to fulfill these needs. The importance of synchronization of loading and hauling equipments in working optimally and efficiently will influences the ability of mechanical devices in productivity. Match factors can find out the comparison of the number of loading and hauling equipment working in mining operations. Analysis of the calculation of match factors based on the circulating time of mechanical devices and the number of devices operating, data taken 30 times a month in July 2018. The primary data such as; circulation time of mechanical devices, resistance factors, bucket and vessel real capacity, effective working time of devices and number of devices, while secondary data such as; devices specifications, devices and operator work time, layout maps, rainfall and company production targets. The research method used is the calculation and analysis of quantitative data on factors that influence the ability of mechanical devices in production. The production target for limestone mining in pit 242 is 350,000 tons / month using a Hitachi ex 2500-6 Excavator unit synchronized with five units of Dumptruck Komatsu HD 785-7. Current devices production capability is 262,198.66 tons / month with a value factor of 0.80. The problem that occurs is not yet achieved the planned production target, this is due to the still low effective working time and work efficiency as a result of existing constraints. Efforts to increase production can be done by improving the effective working time of initially 637.99 minutes per day to 707.30 minutes per day or 81.29% of the total available working time, adding the number of bulk filling to 6 times and adding transportation equipment as many as two units, so that production increased to 361,415.82 tons per month and the value of the match factor for mechanical devices increased to 0.96.

Evaluasi Teknis Pengolahan Batu Granit Untuk Pencapaian Target Produksi 40.000 Ton/Bulan Pada PT Bumiwarna Agung Perkasa Di Desa Air Mesu Timur Bangka Tengah Reza Reza; E.P.S.B Taman Tono; Delita Ega Andini
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bumiwarna Agung Perkasa, abbreviated as PT BWAP has a crushing plant which is divided into two units, namely primary crusher and the secondary crusher unit. Granite stone crushing plant of PT BWAP has production target 40.000 tons/month, but the production target has not been achieved, which 15.185,21 tons on June and 23.406,94 tons on July 2018, because there are production barriers which cause the available work of these two units to reduce and improve production targets, therefore to achieve production targets, evaluation of the demolition plant is needed. The method used in this study is the tool availability method. The data needed is the speed of feed raw material, tool working time, tool standby time and the weight of product samples taken on the conveyor belt. The main calculation of the primary primary crusher unit is very low at 32,67 % with a total production of only 26.940,20 tons/month and the secondary crushing unit is also very low at 42,45 % with a total production of 20.424,92 tons/month. After repairs, the working efficiency of the primary crusher unit increased to 75,69 % and the work efficiency of the secondary crusher increased to 78,15 % and to increase feeding to the secondary crusher unit, activating the two vibro feeders, so that the feed increased from 190,34 tons/hour to 260,06 tons/hour and the final production of crushing plant increased to 53.352 tons/month.

Optimalisasi Shaking Table Dalam Pencucian Bijih Timah Low Grade Di PPBT Pemali Kabupaten Bangka PT Timah Tbk Siti Halimah Nasution1; Irvani Irvani; Alfitri Rosita
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Tin ore processing is carried out by one of the companies namely Pemali PPBT or Tin Ore Processing Center. PPBT uses SHP feeds (leftover processing results) as material used with standard levels of ± 20% Sn. This feed will then be processed first using a water table, where the results of this process are concentrated, middling and tailing products. Concentrate with high levels while middling ranges from ± 5% Sn. This feed middling air table will be processed again with the shaking table. The increase in levels that occurred during the washing process with the shaking table only increased by 10-15%. This is because there are still many looses of minerals which are followed towards middling and tailings. Therefore it is necessary to increase the level with the trial method on setting the shaking table variables such as the washing water rate of three trials namely 4,201.7 liters / hour, 2835.3 liters / hour and 829.9 liters / hour, and on the variables slope three times the test is 2.8ᵒ, 3.8ᵒ and 4.7ᵒ. As a result of this process, the shaking table has increased levels from before processing 4-6% Sn, after being processed in the shaking table in PPBT it has increased by 10-40% Sn. Optimization of Sn and recovery levels in the right shaking table for the type in PPBT is the washing water rate of 2835.3 liters / hour with levels of 40.64% Sn and recovery of 63.6%. Slope of 3.8ᵒ with a level of 22.16% Sn and recovery of 57.0%. In combination No. 6 (3.8ᵒ and 829,9 liters / hour) with levels of 40.36% Sn and recovery 49.7%.

Evaluasi Kesesuaian Perhitungan Cadangan Secara Manual Terhadap Penggalian Nyata Bijih Timah Blok Realisasi Pada BWD Kundur 1 PT Timah Tbk Di Laut Penganak Bangka Barat 0DI RIPANDA; E.P.S.B TAMAN TONO; Alfitri Rosita
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

BWD Kundur 1 with the ability to dig up to 60 meters below sea level . Tin Mining Processes in theSea Penganak is mined using Bucket Wheel Dredge in the realization block with a total production of30 tons in September 2018. With the production target the calculation of company reserves is greaterthan the production realization of the BWD. The problem obtained in the field is a mismatch of reservecalculations with the realization of extracting tin ore that exceeds the tolerance limit. For good yieldcoefficients, namely 1 - 1.2, which has been set SOP. The reserve calculation uses the manualmethod using the Area of Influence method which this calculation is done by making a polygon area ofthe influence of the borehole and calculating the area of influence of the drill hole manually with 3 drillholes in the realization block of Kundur 1 BWD of 34,348 tons and the results of the realization of the2018 septber month were 30 tons. After obtaining the results of the two reserve calculations and theresults of the realization, then the two results can be compared to determine the Results Coefficient,find the factors that caused the incompatibility of the calculation of the performance such as BWDperformance, the type of layer extracted BWD, weather at the time of excavation and efforts toimprove Results Coefficients such as doing selective mining to determine the productive direction ofmultiplication. From the results of the manual calculation of the realization block obtained Pdh 34,3tons while the results of realization in the Psb field of 30 tons, the percentage difference in the ratio is -12,65% and the Results Coefficient of 0.85 including inappropriate from KH 1.2 according to SOP with0.2 tolerance.

Pengaruh Riffles dan Kemiringan Underflow Sluice Box Terhadap Optimalisasi Pemisahan Bijih Timah Skala Laboratorium Indra Chang; Janiar Pitulima; Guskarnali Guskarnali
MINERAL Vol 4 No 2 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Underflow sluice box is a mineral processing tool that aims to separate the main minerals from associated minerals based on the principle of gravity concentration, which is equipped with boil boxes and underflow riffles as a separation medium in tin ore. The use of laboratory scale underflow sluice box provides Sn concentrate results with high Sn grade and recovery through the influence of underflow riffles and slope positions. Where underflow riffles parameters are in the position of 0.5 cm, 1 cm and 1.5 cm and the slope used is 0 °, 3 ° and 5 °, the experiment is carried out 9 times using 2 kg feed and the same Sn grade in each sample. From the results of the experiment obtained the dry weight and Sn grade concentrates which were analyzed by Sn grade using Grain Counting Analysis (GCA) and recovery calculations. After analysis and calculation, the highest Sn grade was found in sample 9 with underflow riffles position of 1.5 cm, slope of 5 ° and water flow velocity in the water flow velocity at 54 l/minute at 44.61 %, while recovery was highest in sample 3 with underflow riffles 1.5 cm, slope of 0 ° and water flow velocity in the water discharge at 54 l/minute at 99.13 %. Based on these results it can be said that if the underflow riffles and slope position is greater, the recovery and Sn grade concentrates are obtained high and if the underflow riffles and slope positions are smaller, the recovery is high with a low Sn grade concentrates.

Analisis Pengaruh Parameter Kompaksi Terhadap Nilai CBR Berdasarkan Standar dan Kriteria Jalan Tambang PT Bukit Asam Tbk. Tanjung Enim Mitha Elisza; Mardiah Mardiah; Haslen Oktarianty
MINERAL Vol 4 No 2 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This study analyzes the effect of compacting parameters on CBR values based on PT Bukit Asam Tbk's standards and criteria. The problem behind this research is that the overburden target at the TAL-West mining site to the South sump disposal is not affected by the speed of the transport equipment which is caused by the damaged road because the carrying capacity does not reach the standard so the circulation time increases. Therefore it is necessary to analyze the effect of compacting on CBR values based on company standards and criteria to meet the production target in April 2019 of 1,500,000 BCM, while the realization only reaches 1,379,160 BCM. The research method used is a linear regression method that analyzes the influence and relationship of independent variables such as material physical properties, compacting parameters and dependent variables, namely CBR values. The results of this study are that the physical properties of material have a relationship and influence on CBR values. Compaction parameters have a relationship with CBR values such as small dry volume weight so CBR value increases while optimum water content is large, CBR value decreases. Based on the evaluation of company standards and criteria, the best material in the B2C-22 sample with water content of 9.49%, density of 2.77, CBR value of 74.87% of the type of inorganic clay with light ash.

Page 4 of 18 | Total Record : 172

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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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Home Page

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Contact Email mineral.ubb@ubb.ac.id

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Editorial Address Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung

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Jurnal Mineral

Contact Email
mineral.ubb@ubb.ac.id

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+6281373020110

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mineral.ubb@ubb.ac.id

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Gedung Dharma Pengabdian, Fakultas Teknik Universitas Bangka Belitung, Kampus Terpadu UBB, Balunijuk Provinsi Kepulauan Bangka Belitung

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Kab. bangka,

Kepulauan bangka belitung

INDONESIA