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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 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

Perhitungan Cadangan Batupasir di Derah Perencanaan Tambang Desa Pegongsoran, Kecamatan Pemalang, Kabupaten Pemalang, Jawa Tengah Narulita Santi; Wahju K Hidajat; Nur Adillah; Devina Trisnawati; Nurakhmi Qadaryati
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Indonesia has large number of sandstone reserves throughout the region. One of the potential reserves of Sandstones located in Pegongsoran, Pemalang. The purpose of the study is to know subsurface rock distribution so amount of Sandstones reserves can be determined for mining. The method used is Schlumberger arrays configuration geoelectrical method. Geoelectric measurements carried out at four points, geological mapping also conducted to know geological conditions and surface geomorphology.. From data processing in the field lithology found in the field are volcanic breccia, sandstones, and tuff. To figure out the subsurface conditions and rock layer distribution is performed correlation with three sections A-A’ section consist of GL-04, GL-03, GL-01. The B-B’ section consist of GL-04, GL-02, GL-01 C-C’ section consisting of the geoelectrical points GL-03 and GL-02. Based on volumetric calculation result with model block method using Rockworks software sandstones volume is 2,030,000 m3 while Calculation results using Cross-section method is 1,788,845m3

Perencanaan Sistem Pemompaan pada Penambangan Timah Primer Shaft Lacat 4 Pt Menara Cipta Mulia Kelapa Kampit Belitung Timur Aryuni Yusra Hamid; Delita Ega Andini; Haslen Oktarianty
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research was conducted to redesign the pumping system in the air drying process within a maximum of 25 days. The method used is descriptive and quantitative methods with actual data in the form of pressure and suction pipe elevation, pipe length and diameter, catchment area, actual discharge and pump head, location coordinates.The runoff discharge is 1.89 m3 / s, is prevented from entering the mine area by creating a channel with discharge flow of 2.12 m3 / s. The total volume on Shaft Lacat 4 is 34,591.7 m3 . The pump at a depth of 20 m has a discharge of 229.37 m 3 / hour, while a depth of 28 m has a discharge of 210.73 m3 / hour. Assuming the ground water is 200.64 m3 / hour, the addition of one pump with a discharge of 36 m3 / hour so that the drying time for 24 days is 11.8 hours. Production is stacking the sump of 1 x 1 x 1.5 m, making a channel with dimensions of 10 cm x 10 cm.

Kajian Teknis dan Biaya Kegiatan Rehandling Batubara PT Bukit Asam Tbk Tanjung Enim Sumatera Selatan Rahmad Tanjung; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The East Block Muara Tiga Besar Utara mining system uses Shovel and Trucks where the digging stage uses excavators and bulldozers and the transport stage uses a dump truck. Coal production target of Muara Tiga Besar Utara Block Timur in July is 300,000 tons and August is 294,000 tons. The method used in this research is quantitative data analysis method by calculating the productivity of digging and transporting tools, analyzing the technical implementation of coal rehandling activities and analyzing the cost of coal production and rehandling activities. The results of this study obtained the productivity of PC 400 Lc excavator304.35 tons/hour, bulldozer D 375A of 674.61 tons/hour and Hino FM 320FI dump truck equipment of 37.06 tons/hour, the cost of coal production in July is IDR 13,772,009,648.00, in August IDR 13,495,592,315.10 and the cost of coal rehandling activities is IDR 160,685,158.30/month. Based on the cost of coal production and the cost of coal rehandling activities, it can be analyzed that there was a decrease in production costs between July and August due to a decrease in mining production targets in anticipation of coal rehandling activities.

Evaluasi Sistem Penirisan Tambang di PT Vitrama Properti Desa Air Mesu Kabupaten Bangka Tengah Riztia Ramadhanti; Delita Ega Andini; Haslen Oktarianty
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Vitrama Properti applies mine dewatering system by making open channel. The open channel got silting because many solid particles have deposited causing the mine road become flooded. The method used is quantitative method by evaluating and analyzing dewatering system. The data taken is in the form of coordinate data, actual discharge, channel dimensions and the time for sediment deposition on settling pond. Catchment area is 42.4 ha. Based on the calculation of rainfall data and rainfall analysis with the gumbell method, the maximum planned rainfall value is 183.9 mm/day with a rain intensity is 63.75 mm/day, the maximum total discharge is 156,193.92 m3 /day or 1.8078 m3 /day. The surface width of the new channel is 1.7 m, the bottom width is 0.5 m and height is 1 m. The new settling pond dimension have total design volume of 3,292.5 m3 . The time for dredging the sediment material in the settling pond is every one or two years when the sediment material in compartment one has deposited as much as 60% of settling pond volume

Kajian Efektifitas Kerja Operator dan Kondisi Alat pada Front Penambangan Tambang Besar Pemali PT Timah Tbk Rajesta F. Wardana; E.P.S.B. Taman Tono; Delita Ega Andini
MINERAL Vol 6 No 1 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The work efficiency value on the TB Pemali mining front in 2018 is relatively low (57.16%), This condition means it required the improvement of the work efficiency in accordance with the good mining practice. Method used in this research including preparation, collecting data and field orientation, which is then processed as follows: counting work efficiency of the dig tools for load and hauling tools in mining area front, analyzing operator performance and equipments conditions in mining area front, and analyzing work efficiency improvements. The result showing that score of current work efficiency of the dig tools for load in the amount of 62.74%, and for hauling tools in the amount of 57.68%. This result shows that low score of work efficiency in mining area front caused by large breakdown time of the hauling tools and low performance of the operator, then improvement of work efficiency is carried out by reducing the operator's variable trouble limit by 35% and reducing indent time of broke sparepart, the final score of work efficiency of the dig tools for load in mining area front is in the amount of 66.27% and for hauling tools in the amount of 66.44%

Page 7 of 18 | Total Record : 172

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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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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