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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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INDONESIA
MINERAL
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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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

Abstract

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.
Potensial Mineral Kasiterit Pada Tailing Penambangan Timah Daerah Parit Tiga Kabupaten Bangka Selatan Rezky Dwi Aditya; Irvani Irvani; Janiar Pitulima
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.v7i1.3334

Abstract

Unconventional tin mining in Parit Tiga Village, Toboali District, South Bangka Regency is one of the mining sites that is rampantly carried out by the community. The problems that arise from the activities carried out by the community indicate that tin minerals in that location still have the potential to be mined at the conventional mining scale, this condition makes researchers want to study how much potential Sn levels are still contained even though the location is in the form of tailings. Data collection was 16 points at the first tailings location with an area of 160.000 m2 and 15 points at the second tailings location with an area of 150.000 m2. The samples were taken regularly with a distance between samples of 100 meters with a depth of 1,5 meters. Tailings samples were then tested using a microscope overview analysis method to obtain cassiterite levels. The results showed that the study area had 201.15 tons of Cassiterite potential at the first location and 300 tons at the second location to be studied further in terms of its economics.
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

Abstract

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.
Perencanaan Design Geometri Peledakan Berdasarkan Karakteristik Massa Batuan di Bench M PT Tanjung Bukit Nunggal Kabupaten Bangka Tengah Armansyah Putra Sinulingga; Franto Franto; Janiar Pitulima
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.v7i1.3336

Abstract

The availability of the discontinuity structure causes the rock to be blown up have a cavity that later can be traversed by the thumping of explosive energy, so force from the explosion will be inhibited and the blasting is not optimal. This study aims to find the physical condition of granite rock at the mining site, find out the value of Blastibality Index of rock, and analyze the geometry design of blasting to obtain fragmentation ≤ 75 cm. The methods used in this study are quantitative and qualitative methods that are measuring joint structures, physical conditions of rocks, calculation of Rock Factor (RF) values, and calculation of Blastibility Index. The results of this study show if the physical condition of the rocks on bench M has an RQD value 88.97 % - 99.66 %, and Rock Factor value 5.51 and a Blastability Index 45.9 so, obtained a design of geometry with a burden 3.4 m, spacing 5.1 m, stemming 2.55 m, subdrilling 0.68 m, height 7.62 m, depth 5.1 m, and power charging 2.55 m.
Optimasi Konsumsi Fuel Dump Truck Terhadap Pengaruh Grade Jalan Pada Aktivitas Penambangan Pada PT. Pamapersada Nusantara Kecamatan Sangatta Utara Kabupaten Kutai Timur Mushawir Mushawir; Harjuni Hasan; Henny Magdalena
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3338

Abstract

The grade or slope of the road in a mining activity is certainly unavoidable. In addition to naturally following topographical contours, the shape of the mining pit is carried out from a high elevation leading to the lowest elevation following the slope level and the continuity of the excavation material makes the road should be made sloping. The high or low value of the road grade in addition to affecting the speed and travel time required by the unit, of course, also affects the level of fuel consumption. PT. Pamapersada Nusantara uses a conveyance unit with the HD Komatsu 785-7 type to move overburden material. Based on the results of the analysis, in the loaded condition, grade 2% uses 0.45 liters of fuel, 5% grades 0.77 liters, 6% grades 0.89 liters, 8% grades 1.09 liters and grades . While in the unloaded condition, grade 2% uses 0.19 liters of fuel, 5% grades 0.35 liters, 6% grades 0.4 liters, 8% grades 0.47 liters and 9% grades 0. 52 liters.
Studi Pengaruh Powder Factor Terhadap Fragmentasi Peledakan Dan Produktivitas Alat Gali Muat Di PT. Ansaf Inti Resources Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Fernando Lawangan; Revia Oktaviani; Agus Winarno
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3346

Abstract

One of the successes of a blasting is if the results of fragmentation are obtained with good size and relatively uniform so that the production target can be met. The size of the fragmentation was analyzed using Split Desktop 2.0 which resulted in a curve of the size of the fragmentation and the percentage of sieve pass (screening), at Pit 2 the optimal powder factor was between 0.20 kg/m³-0.26 kg/m³, while at Pit 7 it was between 0.22 kg/m³-0.24 kg/m³ which results in top size fragmentation in March 25.02 cm-43.2 cm, April April 35.37 cm-50.59 cm, May 19.79 cm-32.28 cm, June 26.45 cm-63.69 cm, which affect the digging time generated from the Komatsu PC 400 Excavator with an average top size fragmentation size of 38.33 cm with an average digging time of 7.95 seconds, while the Hyundai R 850 LC-9 Excavator with a fragmentation top size the average top size is 33.97 cm with an digging time of 8.44 seconds, with the average productivity of the Komatsu PC 400 Komatsu of 198.49 BCM/Hour from a plan productivity of 200 BCM/Hour while the Hyundai R 850 LC-9 average productivity a of 364.41 BCM/Hour from the plan productivity of 350 BCM/Hour
Studi Efek Skala pada Uji Kuat Tekan Uniaksial Terhadap Batupasir Pada Formasi Balikpapan Daerah Samarinda Utara, Provinsi Kalimantan Timur Milda Milda; Tommy Trides; Harjuni Hasan; Revia Oktaviani; Agus Winarno
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3352

Abstract

Scale effect testing on rocks is carried out with the aim of knowing the strength of a rock based on different dimensions. This test was carried out using a uniaxial compressive strength test and also testing the physical properties of rocks. In the rock compressive strength test used 5 dimensions of rock samples with a H/W ratio of which are 4.5/3, 6/3, 7.5/3 for dimensions of 3 cm, 5.25/3.5, 7 /3.5, 8.75/3.5 for dimensions 3.5 cm, 6/4, 8/4, 10/4, for dimensions 4 cm, 6.75/4.5, 9/4.5, 11.25/4,5 cm for the 4.5 cm dimension and for the 5 cm dimension, namely 7.5/5, 10/5 and 12.5/5. Physical properties testing is carried out to determine the porosity value in the test rock samples, which will then be compared between the porosity values ​​and the results of the compressive strength test of rock samples. Physical properties testing carried out obtained the average value of rock porosity, namely 22.562%, 22.122%, 20.454%, 21.227%, and 22.413%. In the scale effect test, it is known that the higher the rock sample, the smaller the value of the rock strength can be seen based on the R2 value obtained in the Balikpapan Formation, which is 0.0548.
Penerapan Sistem Kesehatan Dan Keselamatan Kerja Menggunakan Metode Strenght Dan Weakness Di PT Energi Cahaya Industritama Samarinda Provinsi Kalimantan Timur Siti Fadlah Musarofah; Agus Winarno; Henny Magdalena; Windhu Nugroho; Lucia Litha Respati
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3363

Abstract

Research on the application of the OHS system is carried out with the aim of analyzing things in the application of K3. The research method uses a descriptive method in the form of a questionnaire. The results of the research questionnaire the highest percentage included in the strength (strenght) including the use of PPE 83.9% agreed that it was applied followed in an orderly manner, promotions and strategies and the application of K3 64.5% strongly agreed, the existence of PPE training that was applied 74.2% agree. The results of the weakness analysis (Weakness) that the highest percentage of the results of the questionnaire diagram are incomplete first aid facilities 80% agree, the workplace is not conducive, planning for implementing K3 strategies, providing emergency facilities for accidents 83.9%, periodic initial checks to employees 74.2% quite agree.
Identifikasi Peningkatan Strength Factor Dengan Metode Q-System Pada Terowongan Tambang Bawah Tanah Daerah Perambahan, Kota Sawahlunto, Sumatera Barat Pebby Putra Juenda; Harnani Harnani; Budhi Setiawan
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3418

Abstract

Underground mining activities (Undergound Mining) at PT Allied Indo Coal Jaya Encroachment area, Sawahlunto City has the risk of subsidence due to reduced soil carrying capacity due to excavation of underground mine openings. The excavation of underground mine openings will result in disruption of the stability of the area such as roof collapse, rib spalling, and floor heave. This research was conducted in 2 research locations, namely Tunnel 6 Seam B and Tunnel 3 Seam C which aims to determine the recommendation of a buffer system in underground mine openings (Tunnel) by analyzing the geomechanical value of rocks using the Rock Tunnelling Quality Index (Q-System) method. ) so that the Strength Factor value increases. Data collection methods were carried out by field observation and laboratory testing, while data processing used Phase 8.0 software with Mohr-Coulomb failure criteria. The results of calculations and data processing showed that the Strength Factor value in Tunnel 6 Seam B was 1,04 (relatively stable) and Tunnel 3 Seam C was 0,84 (unstable). These results indicate that Tunnel 6 Seam B and Tunnel 3 Seam C must be supported by a buffer system. After the buffering system was carried out the Strength Factor value of Tunnel 6 Seam B increased to 1,59 (stable) and Tunnel 3 Seam C increased to 1,63 (stable).
Pengaruh Laju Aliran Dan Ukuran Umpan Sisa Hasil Pengolahan Dengan Humprey Spiral Pada Skala Laboratorium Kabupaten Bangka Suryani Suryani; Franto Franto; Delita Ega Andini
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3512

Abstract

Remaining Processing Results is a combination of grains measuring 0.001-0.6 mm and still has an economical concentrate content. Humphrey Spiral contained in PT Bumako produces cassiterite concentrate content of 2%, while the company's target concentration is 10%. So, a research was conducted on the Humphrey Spiral on a laboratory scale to determine changes in concentrate levels and cassiterite recovery, with flow rate parameters with variations of 1.017 m/s, 1.097 m/s and 1.172 m/s and feed sizes, namely 60 mesh, 80 mesh and 100 mesh. This research method uses Grain Counting Analysis (GCA) and XRF. Based on the results of the study, the accompanying minerals in the Humphrey Spiral bait consisted of 83.98% quartz, 5.65% limonite, 5.19% hematite, 2.83% iron oxide, 1.73% monazite, 0.34% chalcopyrite, magnetite 0.17% and muscovite 0.10%. The highest concentration gain and concentrate recovery was at a speed of 1.097 m/s at a grain size of 100 mesh with a content of 10.3788% and a high recovery of 44.1512%.

Page 9 of 18 | Total Record : 172

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