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All Journal Jurnal Forum Nuklir Akuatik: Jurnal Sumberdaya Perairan PROMINE Jurnal Himasapta MINERAL
Franto, Franto
Jurusan Teknik Pertambangan, Fakultas Sains Dan Teknik, Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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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.
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%.
Analisis kestabilan lereng menggunakan metode kesetimbangan batas dan probabilistik di TK 4488 PT Timah Tbk Pratama Aditya Irawan; Franto Franto; Irvani Irvani
Jurnal Himasapta Vol 8, No 1 (2023): Jurnal Himasapta Volume 8 Nomor 01 April 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jhs.v8i1.8726

Abstract

TK 4488 merupakan tambang alluvial. Tambang ini dulunya merupakan bekas tambang, seiring harga timah semakin baik maka dikerjakan kembali dengan kondisi material loose yang rentan terjadi kelongsoran. Penelitian dilakukan untuk menganalisis kestabilan lereng melalui pengujian sifat fisik dan mekanik, metode kesetimbangan batas dan probabilistik Monte Carlo. Satuan lapisan penyusun lereng terdiri atas satuan, Pasir Lanauan, Pasir Bergradasi Jelek, Pasir Bergradasi Baik, Pasir Bergradasi Buruk dengan Kerikil dan Lempung, Pasir Bergradasi Baik dengan Kerikil dan Lempung, Pasir Bergradasi Baik dengan Lempung. Penampang A–A’ FK deterministik 1,30, PK 4,60% dan FK mean 1,31 kondisi statis. FK deterministik 1,06, PK 20,20% dan FK mean 1,07 kondisi dinamis. Penampang B–B’ FK deterministik 2,97, PK 0% dan FK mean 2,98 kondisi statis. FK deterministik 1,80, PK 0% dan FK mean 1,80 kondisi dinamis. Penampang C–C’ FK deterministik 2,39, PK 0% dan FK mean 2,35 kondisi statis. FK deterministik 1,06, PK 22,10% dan FK mean 1,06 kondisi dinamis. Dilakukan optimasi pada penampang A–A’ dan penampang C–C’, FK deterministik 1,23, PK 0,40% dan FK mean 1,23 penampang A–A’. Sedangkan penampang C–C’ FK deterministik 1,26, PK 0,20% dan FK mean 1,27.
Evaluasi Kemiringan Jalan Tambang Terhadap Cycle Time Alat Angkut Pada Dump Truck Hino FG 235 JJ Tambang Batu Granit Di PT Aditya Buana Inter Kabupaten Bangka Fitra Adreansyah; Franto Franto; E.P.S.B Taman Tono
MINERAL Vol 8 No 1 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i1.4094

Abstract

PT ABI is a private company engaged in the granite mining business using the open pit method. The problem encountered is that there is a slope of the mine road that does not comply with the standards set by the company, namely ≤ 8%, the slope of the mine road, which is not suitable, makes the truck to produce large rimpull, which affects the overall distribution time. This study aims to evaluate and optimize the dump truck cycle time obtained. This research begins by calculating the actual travel time on 2 dump trucks in 40 trips, conveyance A gets 493.72 seconds and conveyance B is 495.75 seconds, the actual travel time on the haul road segment exceeds ≥ 8%, i.e. in the B-C segment which has a grade of 8.86% with an average travel time of 20.38 seconds and in the C-D segment which has a grade of 10.51% with an average travel time of 37.91 seconds. Obtained circulation time decreased by 5 seconds from 494.73 seconds to 489.69 seconds with a percentage increase of 1.04% after optimization, meaning that the conveyance can transport 89 tons more of material.
Analisis pada rod mill untuk mendapatkan optimasi derajat liberasi timah primer di PT Menara Cipta Mulia Lisa Maulidya; Franto Franto; Guskarnali Guskarnali
Jurnal Himasapta Vol 8, No 2 (2023): Jurnal Himasapta Volume 8 Nomor 02 Agustus 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jhs.v8i2.8673

Abstract

PT Menara Cipta Mulia merupakan perusahaan pertambangan timah primer yang terletak di Desa Senyubuk, Kecamatan Kelapa Kampit, Belitung Timur. Adapun permasalahannya yaitu belum optimalnya pemisahan timah dengan tailing. Penelitian bertujuan untuk mengetahui sebaran ukuran butir, derajat liberasi optimal dan menganalisis kinerja rod mill. Metodelogi penelitian dilakukan pada 36 sampel dengan berat tiap sampel 500 gr menggunakan variabel 5 rod, 6 rod dan 7 rod dengan waktu penggilingan 30 menit, 35 menit dan 40 menit serta feed 35 kg, 40 kg, 45 kg dan 50 kg menggunakan material kuarsit. Dilakukan analisis sieve, Grain Counting Analysis, uji XRF serta analisis statistik. Nilai rata – rata ukuran butir pada 50 mesh sebesar 12,84%, 80 mesh sebesar 28,85%, 100 mesh sebesar 12,02%, 150 mesh sebesar 10,70% dan >150 mesh sebesar 35,59%. Nilai derajat liberasi optimal berada pada variabel 6 rod, waktu penggilingan 35 menit dan 40 menit serta feed 35 kg dan 40 kg. Penelitian menujukkan kasiterit pada sampel nomor 17,18 dan 22 sudah terliberasi optimal pada ≥100 mesh dan analisis regresi linier berganda pada uji parsial dan uji simultan berpengaruh signifikan dan nilai kolerasinya sebesar 62,3%.
Evaluasi Kinerja Alat Pengolahan Wet Belt Low Intensity Magnetic Separator (WBLIMS) Untuk Meningkatkan Kadar dan Recovery Sn di TB Primer Batubesi PT Timah Tbk Kabupaten Belitung Timur Dimas Pangestu; Franto Franto; Janiar Pitulima
MINERAL Vol 8 No 2 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i2.5020

Abstract

Primary TB Batubesi Site a subsidiary of PT Timah Tbk, processes primary tin feed stockpile and SHP of oxide clay type using various tools, including the Wet Belt Low Intensity Magnetic Separator (WBLIMS). Currently, WBLIMS can only produce tin concentrate with a grade of 0.5-2% and a recovery of 5-8%, falling below the company's target of 8% grade and 15% recovery (XRF Test). This research conducted eight experiments with variations in feed types and rates. The WBLIMS feed from the stockpile has a Sn content of 0.62%, resulting in a tin concentrate with 1.21% Sn and a recovery of 7.05%. On the other hand, the feed from SHP has a Sn content of 0.61%, resulting in a tin concentrate with 0.95% Sn and a recovery of 5.11%. The type and rate of feed affect the increase in Sn grade and recovery. At low feed rates, the feed material yields lower Sn grade and recovery, while at high feed rates, the results are higher. Increasing the feed rate for WBLIMS from the stockpile leads to a decrease in Sn grade and recovery, whereas in the processing of SHP, the Sn grade increases but recovery varies. Experiments F1L1 and F2L3 yield the most optimal Sn grade and recovery, with F1L1 having a Sn grade of 2.28% and recovery of 11.54%, and F2L3 having a Sn grade of 2.87% and recovery of 9.24%. Although not reaching the company's target, these experimental results can enhance the Sn grade and recovery compared to the previous setup.
Perhitungan Volume Stockpile dan Pengoptimalan Waktu Pengolahan Stockpile 3, 5 dan 6 Terhadap Produksi Alat Gali muat dan Alat Angkut pada TB Primer Batubesi PT Timah Tbk Neni Sherina; Franto Franto; Mardiah Mardiah
MINERAL Vol 8 No 2 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i2.5070

Abstract

PT Timah Tbk's Batubesi Primary Large Mine has experienced a significant decline in production in recent years, causing a change in the mining process to stockpile management that is still economical with a grade of 0.2%. This study aims to determine the volume and production of stockpiles 3, 5 and 6, the type of sediment and Sn content of stockpile material and the time required to spend stockpile material 3, 5 and 6 in order to get the optimal time. The method used is a quantitative method by taking cycle time data as much as 30 data and analyzing sample levels using XRF on each stockpile. The results of this study obtained the volume of stockpile 3 material is 132,648.42 m3,, stockpile 5 is 162,570.25 m3, and stockpile 6 is 33,090.19 m3. The calculated machine productivity at stockpile 3 is 42.17 tons/hour, stockpile 5 is 48.11 tons/hour and stockpile 6 is 39.53 tons/hour. The highest Sn content is found in stockpile 6 which is 0.33% with the type of skarn sediment. While the lowest Sn content is found in stockpile 3 which is 0.2% with oxide clay sediment type. In stockpile 5, the Sn content is 0.31% with the type of oxide clay sediment. The remaining volume of stockpile material in stockpiles 3, 5 and 6 can be spent with a time of 2.78 years using 1 unit of excavation equipment and 1 unit of transportation equipment. Optimization is carried out so that the remaining stockpile reserves can be spent within 1.74 years using 1 unit of excavation equipment and 2 units of transport equipment.
Perencanaan Tahapan Persiapan Dan Perhitungan Reklamasi Di Lahan Bekas Tambang Air Rikai PT Timah Tbk Kabupaten Bangka Salsabila Oldia Zahrah; Franto Franto; Mardiah Mardiah
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.5140

Abstract

The research location chosen was the Air Rikai ex-mining land, which is an alluvial ex-mining land within the IUP of PT Timah Tbk. The negative impact that arises from mining is in the form of land damage. This research aims to overcome damage and also ensure that reclamation activities can be carried out well. The method used in this research is a quantitative method. The data taken is in the form of soil samples, soil pH and water pH data, topographic data (x,y,z coordinates) and bathymetric data for the depth of the pit. The results of data processing and analysis show that the condition of the land to be reclaimed has an area of 13 Ha and is divided into 2, namely voids with a total area of 1.57 Ha and land area of 11.43 Ha. Land use is carried out by stockpiling overburden with a required volume of overburden of 35,511.54 m³. Land leveling with a volume of pushed soil of 35,280 m³. Arrangement of the edge of the pit with a volume of soil moved of 230.29 m³. Construction of drainage channels with an excavation volume of 214.59 m³. Installation of concrete buis type culverts with dimensions of 50 x 50 cm and a length of 50 cm. In the revegetation, 1,517 oil palm trees were planted, then 463 sea cypress trees were planted along the underside and LCC seeds to help loosen the soil. Treating acid mine drainage with 350 water hyacinths. The costs required for reclamation are divided into 2, namely, Direct Costs and Indirect Costs. The direct costs required are IDR 679,286,160 and the indirect costs required are IDR 213,975,140. The total costs required for reclamation of land with an area of 13 Ha are IDR 893,261,300.
Co-Authors Armansyah Putra Sinulingga Bahri, Alim Delita Ega Andini Dimas Pangestu Eddy Nurtjahya EPSB Taman Tono Ferdinand De Lessep Samosir Fitra Adreansyah Guskarnali, Guskarnali Haslen Oktarianty Indra Ambalika Syari Irma Akhrianti Irvani, Irvani Ismed Inonu Janiar Pitulima Kartika Kartika Lisa Maulidya Mardiah Mardiah Nadilah Juang Putri Neni Sherina Nur Annisa Pratama Aditya Irawan Rika Favoria Gusa Salsabila Oldia Zahrah Suryani Suryani