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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 6 Documents

Search results for , issue "Vol 5 No 2 (2020): MINERAL" : 6 Documents clear

Kajian Produksi Ball Mill Dalam Menentukan Efektivitas Penggerusan Bijih Timah Primer Di CV Persada Tambang Intitama TK 4.218 Paku Kabupaten Bangka Selatan Agus Cik; Mardiah Mardiah; Guskarnali Guskarnali
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

CV Persada Tambang Intitama TK 4.218 Paku is a partner company of PT Timah Tbk, which conducts primary tin mining using the open pit method. Primary tin ore processing includes comminution, sizing, and concentration activities. Grinding using a Ball Mill is an advanced process that aims to reduce the grain size of the material in order to obtain finer grain sizes (fine material) and prepare the right grain size for the concentration process of 80 s.d - 200 mesh. In this study, the variables used are feed rate, number of Ball Mill revolutions (RPM), and water rate. The experiment was used 27 times by setting variables in combination to get effective scouring results. The material at the study site is divided into high grade and low grade materials with primary tin mineralization types in the form of stanniferous veins and gossan formed due to the oxidation process of polymetallic veins. Variable feed rate, number of Ball Mill revolutions (RPM), and water rate are very influential on the results of grinding. The higher the feed rate, the number of turns, and the rate of water the higher the Ball Mill scour, but if the variable is too high it causes overload capacity so that the output volume decreases. The effectiveness of the grinding results obtained in sample 24 with the highest production value reaching 93.9%. The effective value is obtained from setting the feed rate variable 5 to 6 Ton Per Hour (TPH), 80 rotation RPM, and water rate of 10.800 liters/hour (l/h). The result of the maximum feed rate that can be done is 9.86 TPH with LPT is 236.64 ton/day. Thus, the average LPT target of the company's 230-240 tons/day Ball Mill can be achieved

Pengaruh Fragmentasi Terhadap Digging Time Dan Produktivitas Excavator Liebher R9400 Pada Area Peledakan PT Dahana Site Adaro Alex Lisendrik Nadapdap; Guskarnali Guskarnali; Haslen Oktarianty
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research examines the effect of fragmentation on the digging time and productivity of the Liebher R9400 excavator at blasting area of PT Dahana site Adaro. The problem in this research is that the excavator productivity is not evenly distributed in each location, because the size of the fragmentation that is different in each location. The method used in this research is to analyze the factors supporting productivity such as digging time, efficiency and actual conditions in the field, and the method of image and obtained an average size of material fragmentation of 55.76 cm with the smallest fragmentation size of 29.15 cm and the largest size of 70.28 cm. the results based on actual obtained different productivity of excavators in research locations. The first productivity is 4,780.07 tons / hour with fragmentation of 53.1 cm, the second is 4,639,585 tons / hour with fragmentation of 62 cm, the third is 4,765,638 tons / hour with fragmentation of 56.14 cm, and the fourth is 4,746,547 tons / hour with 50.7 cm fragmentation. Based on the analysis it was concluded that the greater the size of the fragmentation, the productivity of the Liebher R9400 excavator will decrease and vice versa. However, there are several factors that affect excavator productivity, namely fragmentation quality, work efficiency, swing angle, tool maintenance, operator, swell factor, and digging ressistance.

Master Plan Pit Blok Timur Tambang Batubara Di PT Artamulia Tatapratama Kabupaten Muaro Bungo Provinsi Jambi Benget Harmoko Manik; Guskarnali Guskarnali; Haslen Oktarianty
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Artamulia Tatapratama is a private coal mining company located in Tanjung Belit Village, Jujuhan, Muaro Bungo, Jambi Province. The topic of discussion in this research is the location in the East block has an area of 161 Ha, does not yet have a mining design, therefore a master plan is carried out, provided that the striping ratio of the company is 8 : 1, 10 : 1 and 12 : 1. The method begins with taking strike dip 80 data for landslide analysis and optimal angles with Dips software, followed by testing the safety factor in the Slide software, then processing 60 drill data on Minescape to design pit limits, calculating reserves using the strip block method and solid blokc, then resgraphic determining economical area is mined and designing the pit design. Based on this, there are indications of wedge avalanches, the design angle should not be more than 82o and the pit limit area of 98 Ha with a striping ratio design pit SR 8 area 22 Ha overburden 4.828.436 BCM coal 595.956 tons, pit design SR 10 area 35 Ha overburden 6.997.226 BCM and coal 690.022 tons, design pit SR 12 with an area of 42 Ha 9.702.861 BCM and coal 799.561 tons.

Analisis Pengaruh Geometri Jalan Tambang Dari Front Penambangan ke Stockpile Terhadap Keselamatan Kerja PT Caritas Energi Indonesia Sarolangun Jambi Rika Fitriani; Guskarnali Guskarnali; Delita Ega Andini
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Caritas Energi Indonesia (CEI) is a company engaged in coal mining in Sarolangun Jambi. Based on the work accident data in the last 5 years of PT Caritas Energi Indonesia on the hauling coal getting road using dump truck transport Equipment Scania 380 P that resulted casualty and inflicted loss for the company both in terms of equipment repair and treatment of victims. The method on this research is to use quantitative data to calculate the width of straight road for sixty one segments, the width of bend road for fourteen segments, calculating the superelevation for fourteen segments, calculating hauling road slope (grade) for sixty one segments, calculating the cross slope for sixty one segments, analyzing the effect of road geometry on Occupational Health and Safety. The width of the straight road is 7 m for one line and 11 m for two lines, all segments were qualified, except Segment 0+400, Segment 0+700, Segment 1+600, thereforeit is necessary to increase the width of road to fit the standard, the width of the bend roadis 8 m for a single line and 13 m for two lines, all segments were qualified, exceptSegment 0+500, Segment 1+000 and Segment 4+100, superelevationbased on standard is 4%, not all of the superelevations were qualified so it needs to increase the width of the bend road so that it might avoid the centrifugal force while passing through the bend, all the grade of segmentswere qualified. PT Caritas Energi Indonesia didn’t have cross slope so the company needs to pay attention and make cross slope according to the standard of 40 mm/m. The geometry of the mining road of PT Caritas Energi Indonesia weren’t qualified, it might effectedwork accident so that it needs improvement accordance with standards

Kajian Teknis Geometri Peledakan Di Pit 2 Banko Barat PT Bukit Asam Tbk, Tanjung Enim, Sumatera Selatan Masyeba Evans Lubis; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bukit Asam Tbk is one of the company that runs in coal mining at South Sumatera. One of the mining activity in PT Bukit Asam Tbk is overburden stripping using blasting method. The purpose of blasting method is to soften the hard outer layer material to ease the process of excavation using drilling and hauling instrument. Analysis of blasting geometry is done in order to get the fragmentation result that appropriate to the capabilities of drilling and hauling instrument. In the location of Pit 2 Banko Barat, blasting using air decking method that is called stemdeck is done to get better fragmentation result and less explosives usage. The research consist of 10 times blasting. The actual geometry rate here as follows 6.46 m burden, 6.40 m space, 6.75 hole depth. According to three data that are chosen in condition of same powder factor result in uneven fragmentation rate. This is caused by different rain intensity. Rainfall is causing blasting hole to be wet and decreasing the blasting capabilities of explosives. Those three explosives result in 18.22 cm of total fragmentation rate. This condition is caused by the same doing to different rock structure on mining location in the making of blasting geometry design. Fragmentation rate chart shows increasing value that follow burden value. Lowest fragmentation rate is 12.46 cm with 6.38 cm burden, 0.18 kg/m3 powder factor. So that if fragmentation needed to be lower than 12.46 cm later, it is recommended to use burden under 6.38 cm when calculating the blasting geometry design.

Kajian Teknis Sistem Jaringan Ventilasi Tambang Ciurug Level 600 PT Aneka Tambang Tbk UBPE Pongkor Leyriesa Awdina; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 2 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

According to field observation result the average dry temperature and wet temperature around between 23 – 30 ºC, with relative humidity around 83 - 93 % and contain 20.9 % O2, 4 ppm CO, on the front production there are 2 cross cut XC 636 and XC 644 have high temperature that reach 31 ºC and 100 % relative humidity. The acquired field data contain dry temperature, wet temperature, wet bulb global temperature, air velocity, and tunnel dimension so then effective temperature, work efficiency and work climate threshold value can be calculated. The result calculation get effective temperature is acquired 29 – 30 ºC, work efficiency 79 - 62 %, and climate threshold value with work arrangement as much 0 - 50 %. Technical problem on the field which causes high temperature is air recirculation from dirty air exhaust from XC 636 that is opposite with clean air direction from fan 75 kW, recirculation on access 644 from booster fan 37 kW located before XC 637 which results in increasing dirty air quantity into front production plus the second front with water puddles from drilling front roof droplets. Effort made on access XC 644 that is fan 75 kW replaced with fan 90 kW, and the tip of flexible duct extends after RC 7 so that the airflow doesn’t mix with exhaust from XC 636, aside from that booster fan 37 kW after XC 637 is moved so it help sucking dirty air from front XC 644, it can resolve air recirculation

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Jurnal Mineral

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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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Home Page

OAI Link

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Contact Name Jurnal Mineral

Contact Email mineral.ubb@ubb.ac.id

Phone +6281373020110

Journal Mail Official mineral.ubb@ubb.ac.id

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

Location Kab. bangka, Kepulauan bangka belitung INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Jurnal Mineral

Contact Email
mineral.ubb@ubb.ac.id

Phone
+6281373020110

Journal Mail Official
mineral.ubb@ubb.ac.id

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

Location
Kab. bangka,

Kepulauan bangka belitung

INDONESIA