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All Journal Jurnal Geomine PROMINE MINERAL

Haslen Oktarianty

Jurusan Teknik Pertambangan Universitas Bangka Belitung

Author-ID : 3568847

Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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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.

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

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.

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

Evaluasi Kinerja Limestone Crushing Plant Terhadap Target Produksi 108.000 Ton/Bulan Pada PT Indocement Tunggal Prakarsa Tbk Unit Palimanan-Cirebon Novi Herlinda; Delita Ega Andini; Haslen Oktarianty
MINERAL Vol 6 No 2 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

This research was conducted to optimize limestone production within a maximum of 30 days. The method used in this research is the frequency distribution statistical method for increasing the time of resistance, The data required are unit resistance hours at the Crushing plant. Based on research and calculations in the field, it is known that the work efficiency of the limestone crushing plant 09 unit is low, 62.87% with a total production only 73.846 tons/month. After many refinement efforts, work efficiency of the limestone crushing plant 09 unit increased 17.31% to 80, 19%, to increase the production target, refinement efforts were made to increase effective working hours by minimizing time constraints, and working time management accordingly production targets were achieved, therefore target production increased from 2,275 tons / shift to 4,173 tons / shift and the final production of crushing plant 09 increased to 125,190 tons / month

Evaluasi Geometri Jalan Tambang Di PT Vitrama Properti Desa Air Mesu Kabupaten Bangka Tengah Selvira Oktaviani; Janiar Pitulima; Haslen Oktarianty
MINERAL Vol 6 No 2 (2021): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Vitrama Properti is a company engaged in mining sector that utilizes natural resources of granite. The condition of mine road at PT Vitrama Properti is not good, causing the lack of transportation productivity in the transportation process. This study aims to evaluate the geometry of the mine road. The method is terrestrial method. Data that obtained are data on straight road width, road width at bends, height differences and bend radius to evaluated with AASHTO. The smallest of road width is 4.67 m, the road width on the smallest bend is 5.8 m, the smallest height difference value is 0.9 m and the smallest radius of bend is 7.695 m. The evaluation results are the width of the haul road on a straight single lane minimum is 6.6 m, the width of the haul road on a straight two-lane minimum is 11.55 m, the width of haul road in two lines minimum bend is 16.485 m, the maximum slope of road is 10%, the superelevation is 4%, and the cross slope is 33 cm.

Kajian Teknis Pengaruh Variabel Shaking Table Terhadap Peningkatan Kadar dan Recovery Pencucian Bijih Timah Unit di Unit Metalurgi PT Timah Tbk Novrida Siregar; Janiar Pitulima; Haslen Oktarianty
MINERAL Vol 7 No 1 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i1.3332

The Mineral Processing Sector (BPM) is a place for processing precious tin minerals with other associated minerals. This research was conducted because the tin content in table water as feed in processing is still quite economical, namely 9.64% Sn and the minimum level that must be achieved as smelting feed is >60% Sn. The data collection method was carried out by conducting feed analysis with the GCA test to determine the levels and distribution of minerals in the feed. Furthermore, the shake table tool variations are adjusted such as stroke lengths of 15 mm, 22 mm, 10 mm with a sample result of 9 samples and the speed of air flow over the table is carried out as many as 3 variations, namely 0.025 m/s, 0.011 m/s, 0.014 m/s with results of 9 samples. Then the combination of the two variables was carried out with the results of 27 samples. The results of the GCA analysis were carried out to see the effect on levels and recovery. The results of the combination of stroke length and water flow velocity were the most optimal in combination with a stroke length of 15 mm and a water flow velocity of 0.025 m/s resulting in a concentrate of 58.44% Sn, moderately 6.26% Sn, and tailings 2.72% Sn as well as recovery. by 58.49%.

Perencanaan Biaya Reklamasi Pada Lahan Bekas Penambangan Batubara Di Site MTBU PT Bukit Asam Tbk Kabupaten Muara Enim Nadilah Juang Putri; Franto Franto; Haslen Oktarianty
MINERAL Vol 7 No 1 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i1.3333

PT Bukit Asam Tbk is a coal mining company. The ex-mining area of the MTBU site which will be reclaimed in accordance with the 2020 plan is 44 ha, but the available land is only 24.84 ha, the rest is still considered productive for mining. Therefore, it is necessary to study the planning of reclamation costs on the MTBU site land. The method of this research activity begins with determining the area of the site to be reclaimed using Argics 10.6 software. then the reclamation costs were calculated which were grouped into direct costs and indirect costs based on KEPMEN ESDM 1827 of 2018. The results of the calculation of the direct cost components and indirect costs of the reclamation plan activities covering an area of 24.84 ha, namely the direct cost of reclamation of Rp. 14,857,849,955 with details of land management costs of Rp 2,363,798,980 and revegetation costs of Rp 485,597,426. Indirect costs are Rp 3,179,579,890,37 with details of equipment mobilization and demobilization costs (2.5%) of Rp 371.446248.88, reclamation planning costs (6%) of Rp 891.470.997.30, administrative costs and profits third parties as the implementation of the reclamation stage of production operations (8.5%) amounting to Rp. 1,262,917,246.18 and supervision fees (4.4%) of Rp. 653,745,398.02. The total cost required for land reclamation of 24.84 ha is Rp. 18,037,429,845.37.

Penilaian Tingkat Kestabilan Lereng De ngan Metode Slope Mass Rating (SMR) pada Bench S dan J PT Tanjung Bukit Nunggal Kabupaten Bangka Tengah Evrantino Insani Sitohang; Janiar Pitulima; Haslen Oktarianty
MINERAL Vol 7 No 1 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i1.3335

Excavation activities on mining activities cause tension changes on the ground that trigger the occurrence of deformation then followed by changes in slope stability. If slope stability is impaired then it will lead to the possibility of an avalanche, this will certainly result in the disruption of mining activities that endanger workers who are on the slope area with potential for avalanches. This study aims to find out parameters of basic RMR and deflection values of basic RMR at bench S and J, find out the values of slope stability using SMR at bench S and J, and cope with slope instability based on SMR values. The methods used in this study are quantitative and qualitative methods namely scanline sampling and rock physical test that is Uniaxial Compressive Strenght (UCS) tests, and Rock Quality Designation (RQD) measurements. The results of this study show that the rock conditions at the bench S and J are still good with RMR values of approximately 71 ± 73, the probability of avalanche occurrence is very low as SMR values range 71 ± 73, but still it needs to be carried out cutting on blocks indicated to ruins.

Co-Authors Alex Lisendrik Nadapdap Aryuni Yusra Hamid Benget Harmoko Manik Delita Ega Andini Desti Armelia EPSB Taman Tono Evrantino Insani Sitohang Franto, Franto Ghina Qatrunnada Guskarnali, Guskarnali Hermita Ramadhini Indra Hot Daniel Hutasoit Irvani Irvani Irvani, Irvani Janiar Pitulima Jimmy Irawan Leyriesa Awdina Mardiah Mardiah Masyeba Evans Lubis Mitha Elisza Muhammad Rafliansyah1 Muhammad Rizki Aulia Nadilah Juang Putri Novi Herlinda Novrida Siregar Riztia Ramadhanti Selvira Oktaviani

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