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All Journal POROS TEKNIK Jurnal Natural INTAN Jurnal Penelitian Tambang

Jance Murdjani Supit

Jurusan Teknik Pertambangan, Fakultas Teknik Pertambangan Dan Perminyakan Universitas Papua

Author-ID : 5403572

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mathematics Physics

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PENGAMATAN UNSUR GEOKIMIA BATUAN ULTRAMAFIK DI DAERAH PERTAMBANGAN PT. BINTANG DELAPAN MINERAL Jance Murdjani Supit; Muhammad Amril Asy’ari
POROS TEKNIK Vol. 5 No. 1 (2013)
Publisher : P3M Politeknik Negeri Banjarmasin

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The research is dealing with weathering and geochemistry behavior of ultramafic rock element. This study consists of field work and laboratory analysis The aim of research is to understand the grade of weathering, and geochemistry behavior of element during weathering in Bahodopi, Morowali Regency, Central sulawesi. Red limonite, yellow limo-nite, and saprolite are the weathering product of ultramafic rock (peridotite). Weathering index calculation indicates the weatering grade increasing with the depth decreasing (from 12 metres to 0 metre or from bedrock to red limonite). The mass balance calculati-on indicates the addition of Ni grade increases up to 315% (10.054 kg/m3), Fe = 286% (180.765 kg/m3), Co = 243% (986kg/m3), Al = 340% (8,923 kg/m3), Cr = 144% (1,303 kg/m3), whereas Mg grade decrease up to 99% (158kg/m3), Si also has 99% (188 kg/m3).

GEOMETRI JALAN ANGKUT TAMBANG PADA KP PT. INDONESIA TIMUR RAYA NABIRE – PAPUA Jance M. Supit
Jurnal Natural Vol. 6 No. 2 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Haul road is an important infrastructure that functions as places connector in mining area. In as much, it is necessary to make haul road geometry plan that suitable to the equipments and mining location. The study of mining haul road conducted in 200 Ha of PT. Indonesia Timur Raya mining area. The study methods are by observation on road site and calculation to decide the haul road geometry, including road wide and slope. The equipment that will be used is wheel loader XCMG ZL50G, from the calculation base on the wheel loader specifications, the minimum haul road wide is 10.5 meters for straight road and 28 meter in curve road.

MORFOLOGI ABU LIMBAH PENGOLAHAN KAYU SEBAGAI BAHAN DASAR GEOPOLIMER UNTUK MATERIAL PENYANGGA TAMBANG BAWAH TANAH Jance M. Supit
INTAN Jurnal Penelitian Tambang Vol. 1 No. 1 (2018): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Geopolymer is made from materials that are both natural polozan and artificial pozolan. Pozolan materials contain silica (SiO2) and alumina (Al2O3). Both of these compounds can be found as natural materials (such as metakaolin, and volcanic material), as well as waste (eg fly ash, husk ash). The potential of forest products in the form of wood in Papua, especially Manokwari Regency, is very abundant, as well as its utilization efforts. The processing or utilization of wood results in the solid waste in the form of pieces, leftovers and wood sawdust. This study aims to explain the geopolymer morphology of wood processing waste ash in Manokwari, from which it can be used as buffer material. By using SEM-EDX in the analysis, the results showed that the size of ash grain of wood processing waste was ≤100 µm (from Merbau wood or mixed wood). The elements contained in the ashes of merbau wood waste consist of O, Ca, C, Si, K, Mg, Al, Cu, Fe, and S. Meanwhile, mixed wood waste ash contains O, Ca, C, Si, K, Mg, Al, Fe, Na, and S. Wood processing waste in Manokwari Regency has the potential to be used as the basis for making geopolymer because it dominantly contains Si and Al elements.

PENGARUH PENAMBAHAN MATERIAL STOCKPILE KOKONAO SEBAGAI BAHAN BLENDING DENGAN SUPER GRADE ORE TERHADAP KADAR KONSENTRAT DAN RECOVERY LOGAM DALAM PROSES FLOTASI BIJIH TEMBAGA PADA PT. FREEPORT INDONESIA Utari S. Asmarani; Jance M. Supit
INTAN Jurnal Penelitian Tambang Vol. 2 No. 1 (2019): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v2i1.17

PT. Freeport Indonesia is one of the mining company that process the copper and gold ore. One type of ore processed in this company is Super Grade Ore (SGO). The characteristics of SGO are wet and smooth, which can result some problems in transportation. Therefore, it is necessary to do blending process using material from Kokonao stockpile which tends to be drier and rougher, but has the lower grade than Cut of Grade of company. Applying experimental method, this research aims to figure out effects of the addition of Kokonao material in the blending process with SGO on concentrate grade and metal recovery resulted. Overall, the levels of Cu and Au reduce when the Kokonao material added at each various composition, with the lowest Cu grade is 100% Kokonao (1,97%) and the highest Cu grade is 10% Kokonao (25,69%). Meanwhile, the lowest Au grade is 100% Kokonao portion (3,26 ppm) and the highest Au grade is 20% Kokonao (38,16 ppm). In addition, All various compositions result in Cu recovery that is higher than the company standard (>80%). The highest Cu recovery is resulted by 50% Kokonao composition (97,12%).

EVALUASI KINERJA ALAT PENGOLAHAN SIRTU PT. BINTANG TIMUR LESTARI KOTA SORONG PROVINSI PAPUA BARAT Chairun Nisa; Jance M. Supit
INTAN Jurnal Penelitian Tambang Vol. 2 No. 2 (2019): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

The processing of base course must be able to meet consumer demand. Thus, evaluating the works of the crushing plant as well as adjusting the final products by washing the sand. The problems state in this study are how much the pebble produce from the crushing plant, how much the pebble produce from the sand wash, what kind of obstacles during the process, and how to achieved better production. Further more the study aim to calculate the plant yield production; the diffraction yield is 3075,004 m3 / month with the distribution in each fraction of 3/8 (pebble) fraction of 381,175 m3 / month fraction 1 / 2 (gravel) of 853,121 m3 / month, fraction 2/3 (pebble) of 1164,484 m3 / month, and abubatu fraction of 676,424 m3 / month. The calculation results have not yet reached the company standard; fractions 3/8 (pebble) = 10%, fractions 1/2 (pebble) = 21%, and fractions 2/3 (gravel) = 29%, and rock ash fractions ( very fine sand) = 17%, with the desired presentation the company is a fraction 3/8 (pebble) = 5 - 10%, fraction 1/2 (pebble) = 20 - 25%, fraction 2/3 (gravel) = 30 - 35%, and rock ash fraction (very fine sand) = 20 - 25%. Hence, the results of the presentation are deficiencies in fractions 2/3 (gravel) and stone ash (very fine sand). Whereas for sand washing, the number of buckets is 1339 times per month, with the amount of volume entering 3385.97 m³ / month, and the total volume coming out is 3361 m³ / month. Constraints that occur in the processing process in this case during production such as improper working time, rain, repair of tools, and chunks larger than 35 cm.

ESTIMASI SUMBERDAYA NIKEL LATERIT PADA BLOK 1A PT. XYZ PULAU GEBE Supriyono; Jance Murdjani Supit
INTAN Jurnal Penelitian Tambang Vol. 3 No. 1 (2020): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

XYZ is a company engaged in the field of lateritic nickel mining, where the Mining Business License Area (WIUP) is located in Umera Village, Gebe Island District, Central Halmahera Regency, North Maluku Province. This study aims to estimate Block 1A lateritic nickel resources, and classify the lateritic nickel resources. The analysis conducted is univariate statistical analysis, outliers, semivariogram analysis, variogram validation, ordinary kriging estimation with the results obtained by tonnage of lateritic nickel resources (Ni) and kriging variance values that can be used for determining the classification of resources through Relative Kriging Standard Deviation (RKSD). Indicated mineral resources of lateritic nickel in Block 1A is 3,240,730,596 tons.

SHOTCRETE DELIVERY PROCESS DI TAMBANG BAWAH TANAH DEEP MILL LEVEL ZONE PT FREEPORT INDONESIA Mahatir Eko Sulastyo; Jance Murdjani Supit
INTAN Jurnal Penelitian Tambang Vol. 3 No. 1 (2020): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

In ground support of underground mine, it is important to understand the shotcrete delivery process, since shotcrete is the main buffer applied. The problem found in this study is that there is an indication that the shotcrete volume has not matched the reported shotcrete. So it is important to acknowledge the shotcrete delivery process, the difference in volume and the correction factor. Variables used to calculate shotcrete volume and correction factors obtained in nine main variables as follow: shotcrete trace length, shotcrete trace width, shotcrete trace height, shotcrete transfer distance, shotcrete transfer time, shotcrete transfer time, material weight, material density and shotcrete volume in the Daily Report. Descriptive statistical method is used to select anomaly data outside the population. The research results that average volume of shotcrete on the Batch Plant is 4.83 m³, then transferred to WS Mixer reduced to 4.76 m³ and at Getman the Mixer was reduced by 3.92 m³. The volume difference is due to the unequal aggregate conditions of the shotcrete constituents, the Mixer drum rotates outside the specified speed, shotcrete hardening occurs on the drum causing a reduction in drum volume capacity. Based on these differences, conversion values were obtained to the reported shotcrete volume, which is 0.87 with the shotcrete assumption reported at 4 m³, 0.89 assuming 5 m³ and 0.79 assuming 4.98 m³.

PRODUKVITAS ALAT ANGKUT UNTUK PEMUATAN NIKEL KE TONGKANG PT GAG NIKEL DISTRIK WAIGEO BARAT KEPULAUAN KABUPATEN RAJA AMPAT PROVINSI PAPUA BARAT Irene Lestari Sihombing; Jance Murdjani Supit
INTAN Jurnal Penelitian Tambang Vol. 3 No. 2 (2020): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

PT. Gag Nikel sales its product in the form of mix laterite with 1.8% nickel content. The shipping of the product conducted by transportation contractor PT. Sinar Terang Mandiri using nickel shipping barges. There are two barges used, Bisai barge and Seadragon barge. The planed loading capacity of Bisai barge is 13,000 MT in 3 days loading time while Seadragon barge is 8,000 MT in 2 days loading time. Thus, using 89 dump trucks per day, the working time rate of the Bisai barge is 6.95 hours/day while Sedragon barge is 4.92 hours/day. However, the actual loading capacity of Bisai barge is 12,550.27 MT in 4 days loading time while Seadragon barge is 7,528.64 MT in 3 days loading time. In as much, the loading efficiency is less than 100%. This issue most likely due to the utilization of the dump trucks, thus loading time efficiency using the dump trucks should be evaluate to understand the cause and find the solutions.

PENENTUAN UMUR TAMBANG BANCUH TAK TERPISAHKAN PADA PT SUMBER ANUGRAH BUANA KABUPATEN SORONG Setyo Age Saputro; Jance Murdjani Supit
INTAN Jurnal Penelitian Tambang Vol. 3 No. 2 (2020): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

The mining industry is one of the complex industries, due to its several stage of activities. In the exploration phase one of the activity is interpretation of resources/reserves. In interpreting, one of the method used is the Cross Section method using AutoCAD. This research aims to find out the remaining reserves, comparing the estimated results of mined reserves with the actual results of mined reserves and also the mine remaining life time at the PT Sumber Anugrah Buana 28,532.603m2 mining site. The result of calculation of remaining reserves is 3,015,887.010m3. The actual data of the company's mined reserves amounted to 40,903m3, while the estimated result of the calculation using the cross section method amounted to 277,635.953m3, resulting in a difference of 236,732.953 m3. The remaining life time of the mine is 12 years.

INTERPRETASI DAN KORELASI DATA RESISTIVITAS UNTUK MENENTUKAN LAPISAN AKUIFER DI RT.002/RW.002 KELURAHAN AMBAN KABUPATEN MANOKWARI PROVINSI PAPUA BARAT Brian Rainstra Maay; Jance Murdjani Supit
INTAN Jurnal Penelitian Tambang Vol. 4 No. 2 (2021): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Aquifer layer modeling is a comprehensive study of the condition of the subsurface layer which is applied conceptually and aims to provide an overview of the pattern of the aquifer layer. The purpose of this study is to know how to model the subsurface layer and to determine the depth of the aquifer layer based on the resistivity value in RT.002/RW.002 Amban Village, Manokwari Regency, West Papua Province. The configuration used in this study is a dipole-dipole configuration. The results show that there are three layers, namely clay with a thickness of 0 – 2.6 m, limestone 2.6 – 37.5 m and sandstone 37.5 – 44.5 m. The aquifer layer is in the third layer, namely sandstone. It is estimated that this layer is a free aquifer which is limited by an impermeable layer above and at the bottom of semi-waterproof at a depth of 25-44.5 m.

Co-Authors Brian Rainstra Maay Chairun Nisa Eko Sugiharto Erni Martani Irene Lestari Sihombing Mahatir Eko Sulastyo Maria Justina Sadsoeitoeboen Maria Massora Muhammad Amril Asy’ari Pangeran S. Panjaitan Roberth Sarwom Setyo Age Saputro Supriyono Taberima, Sartji Tumpal Sinaga Utari S. Asmarani

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