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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 1 (2020): MINERAL" : 6 Documents clear

Kajian Teknis Geometri Peledakan dan Powder Factor Terhadap Fragmentasi di PT Semen Padang Indarung Jimmy Irawan; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research is studying about rock fragmentation from blasting result in Front Existing PT Semen Padang Sumatera Barat which shows that there are unmatch size of blasting fragmentation from its target appointed by PT Semen Padang. This research is also study about blasting geometry that represent in burden value dan powder factor which used in the process. The methods used are quantitative and qualitative, that are by studying blasting geometry and powder factor from field observation result and calculating blasting fragmentation size which generated by Software Split- Desktop V.2.0. Blasting fragmentation size analysis in Front Existing is done by applying 4 m burden value, average fragmentation result as much 27.74 cm, and with 4.5 m burden value result as much 30.34 cm, and then with 5 m burden value result as much 29.26 cm while the effect of powder factor against rock fragmentation size in the research obtained using powder factor value as much 0.34 kg/m3, average fragmentation result in 27.6 cm, and with 0.37 kg/m3 powder factor resulting average fragmentation in 32.29 cm, and then with 0.44 kg/m3, the average fragmentation result as much 53.83 cm. Blasting recommendation that can be applied by looking at the research result is that using 4 m burden value to get average fragmentation size as much 27.74 cm, and powder factor value that is usable as much 0.34 kg/m3 in order to get 27.6 cm average fragmentation size

Analisis Pengaruh Perubahan Nilai Total Moisture Dan Ash Content Terhadap Nilai Kalori Batubara Di Unit Pelabuhan Pt Bukit Asam Tbk Tarahan Bandar Lampung Alldino Hernanto; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The coal industry emphasizes the quality of coal because quality will always be directly related to consumers and the company's revenue because the higher the quality of coal, the more expensive the selling price of coal, therefore this research was conducted to determine the difference in coal quality in railroad cars (demolition) and when analyzing for stockpile, the effect of total moisture and ash content on coal calories and the factors causing these changes. In this study, qualitative and quantitative methods were used where the steps taken in this research were sampling in the railroad car and in the stockpile and then using the proximate analysis and analysis of coal calories from the analysis and correlation and regression analysis to determine the effect of total moisture and ash content. against coal calories. The proximate analysis of the coal samples is disassembly total moisture which is 8.49% ar, in the stockpile, which is 10.32 % ar ash content demolition which is 5.37, in the stockpile which is 8.62 % ar and the calorific value of demolition is 7181 cal/gr, in the stockpile that is 6800 kal / gr so that each of the total moisture parameters, ash content and calorific value changes by 1.40 % ar, at 3.25 % ar, and by 400 Kal / gr. Based on the regression results, the total effect of total moisture and ash content on the first calorie each increase of 1 % ar the total moisture value will reduce calories by 123.36 cal/gr, each increase of 1 % ar the value of ash content will reduce coal calorific value by 78.76 cal/gr. The change in value is due to the occurrence of contamination in the stockpile area, the occurrence of swabakar in the stockpile, and the influence of high rainfall on coal

Geometry Evaluation of Mine Road Based on AASHTO 73 to PT Semen Padang’s Hauling Devices Fuel Needs Ghina Qatrunnada; Guskarnali Guskarnali; Haslen Oktarianty
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research examines the geometry of haul roads found at Front Mining 242 towards Crusher VI PT Semen Padang, West Sumatra. This research is based on the results of previous research that there are slope and width that is not in accordance with AASHTO standards on several segments in the mining location. The research also examined the fuel consumption of Komatsu HD785 and Caterpillar 777D haulage devices. This research was conducted by taking data of road geometry using GPS Geodetic and roll meter. Haul roads are divided into several segments with a spacing of about 100 m each. Fuel consumption is calculated based on total resistance received by haulage devices. The evaluation results of the haul road from Crusher VI to Front Mining 242 are the width of the haul road for the two lines in the straight line is 24.1 m, the average width of the actual road is 19.58 m. The width of the haul road for the two lanes on the bend is 24.88 m, the average road width on the actual bend is 21.63 m. Bend radius according to standard 22.81 m, in actual conditions Points M17 and M36 do not meet the standard. The slope of the road according to the standard is 10%, the actual condition averages 13.31%. The amount of cross slope according to the standard is 48.2 cm, the actual condition averages 0 cm. The use of Komatsu HD785 fuel is greater than 15.97 l /rity compared to Caterpillar 777D with a total of 14.98 l/rity. The use of Komatsu HD785 fuel on the recommended road with bend radius 22.81 m to 10.58 l/rity and at the radius of bend 33.35 m to 9,90 l/rity. The use of Caterpillar 777D fuel on the recommended road with bend radius 22.81 m to 8.92 l/rity and at the radius of bend 33.35 m to 8.35 l/rity

Analysis Of The Effect Of Blasting Pattrerns On Ground And Building Vibration Levels Around The Mine At Blasting In Pit 2 Banko West PT Bukit Asam Tbk tanjung Enim, South sumatera Province Indra Hot Daniel Hutasoit; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bukit AsamTbk is one of the coal mining companies in Indonesia that uses an open pit mining system. Demolition of B2-C overburden rocks at the location of electrification mining in Pit 2 Banko Barat is not economical if it is doing by ripping-dozing process so that drilling and blasting activities are carried out. After blasting activities, ground vibration will arise as an effect of the blasting. It is known that the distance of the blasting location with the residential area is at a distance of 1350-1800 m for this reason that vibration measurements must be carried out with the Blasmatet III device. Ground vibration is one of the problems that must be minimized so that the ground vibration level is in accordance with SNI 7571; 2010 did not exceed the vibration threshold that could cause damages, especially for residents. The ground vibration level can be controlled in various ways such as setting the point initiation point, setting the delay time with a higher value, planning the powder factor and finally using the Air deck method. Based on research carried out for 60 days with blasting 17 times which produces different vibrations. The vibration value used for the comparison of the effects of the blasting pattern is used in 6 data, 3 data for the Box cut blasting pattern, which are 0.52, 0.53, 0.56 and for data on the Corner cut blasting pattern which is 0.63, 0.69, 0.73. While for the comparison of data using Air deck, 6 data are used, 3 values of the results of the vibration of the water deck method are 0.73, 0.69,58 and for non-Air decks the results of the vibration are 1.17, 1.05, 0, 88. Calculation of the results of the comparison of the vibration comparison using the delay time there are 6 data used, namely 3 with a delay time of 42 & 67 with the results of vibration, namely, 0.58, 0.69, 0.73 while the delay time 42 & 109 the result of vibration is 0.50, 0.56, 0.58. Of the overall soil vibration values, settlements around the blasting area are in the safe category (PVS <3 mm / s).

Analysis of Distance On Ground Vibration at Around Residential Areas in PT Semen Padang Indarung West Sumatera Province Muhammad Rizki Aulia; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

One of the blasting activity impact in Exsisting Pit by PT Semen Padang is producing the ground vibration. Analyzing the blasting distance needed to know the level of ground vibration. From that analysis, the actual value and prediction value of Peak Vector Sum (PVS) and value of vibration by SNI 7571 : 2010. The measuring of ground vibration level is done in Mess APN as residents settlement, wich is located as far as 611 meters from blasting location. The measurement starts by measuring the blasting geometry, the amount of drill hole, blasting distance, and ground vibration for about 13 data. Those data are processed using Shotplus-I to make the blasting design and the ground vibration level will be known by using blastmate. From the 13 data of ground vibration Mess APN that known on the distance 464 m the result of ground vibration is 1.651 mm/s while on the distance 478 the result of ground vibration is 2.382. Based on the result that can be seen there is an anomaly data, that caused the same blasting geometry treatment for rock structure on mine site. Beside, according measurement data wich are measured in Mess APN, the average value of ground vibration is 1.511 mm/s. It show that the ground ground vibration does not cause a significant impact in Mess APN as residents settlement and does not exceed the limit value of class 2 building category by SNI 7571:2010 (limit value is 3 mm/s)

Technical Study of Blasting Geometry and Powder Factor of Fragmentation at Pit 3 Banko Barat PT Bukit Asam Tbk Hermita Ramadhini; Irvani Irvani; Haslen Oktarianty
MINERAL Vol 5 No 1 (2020): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Mining PT Bukit Asam Tbk is one of the company that works in coal mining. One of the demolition activities in PT Bukit Asam Tbk is overburden stripping using drilling method and blasting. The success rate of blasting activity can be seen from the fragmentation as the blasting result, where the material size is equally spread is better than boulder. On Pit 3 Banko Barat, blasting using stemdeck results with uneven fragmentation size in condition of same powder factor and burden. This is caused by different rain intensity. Rainfall is causing blasting hole to be wet and decreasing the blasting capabilities of explosives. Blasting using stemdeck results in fragmentation average of 27.19 cm. Blasting without stemdeck based on same burden 8 m, results in fragmentation average of 46.46 cm and fragmentation size chart is obtained that shows increasing value as the powder factor from blasting geometry. That thing is contradictory with theory that the greater powder factor will result in uneven fragmentation size because it is connected with explosives usage. This condition is caused by the same doing to different rock structure on mining location in making blasting geometry design. Blasting without stemdeck based on same powder factor 0.16 kg/m3, results in fragmentation average of 66.26 cm and fragmentation size chart is obtained that is increasing as the value of burden. Smallest fragmentation value in average of 25.12 cm with 8 m burden and 0.17 kg/m3 powder factor. So if smaller fragmentation is needed in the future, then it is recommended to use smaller burden in making blasting geometry design.

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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

OAI Link

Editorial Team

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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