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INDONESIA
PROMINE
Published by Universitas Bangka Belitung
ISSN : 23547316     EISSN : 26207737     DOI : -
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Engineering Environmental Science
Jurnal ilmiah dengan nama Promine merupakan terbitan berkala ilmiah Jurusan Teknik Pertambangan Universitas Bangka Belitung yang terbit setiap bulan Juni dan Desember dalam setahun yang meliputi bidang Eksplorasi (Geologi dan Geofisika), Geoteknik/Geomekanika, Pengolahan Minerba, Reklamasi, dan Pasca Tambang.
Arjuna Subject : -
Articles 130 Documents
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Analisis Kestabilan Lereng Pit B Tambang PT. Miyor Pratama Coal, Desa Kumanis Atas Kec. Talawi, Sawahlunto Sumatera Barat Refky Adi Nata; Alexander Alexander
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (160.846 KB) | DOI: 10.33019/promine.v7i1.1056

Abstract

The purpose of this research is a classification of rock from slopes and analyzes safety factor of slope by fellenius and janbu method. This type of research classified as descriptive. For class of rock mass based on bieniawski 1989 and for processing helped with software slide v. 6.0. Research results explain the total weights of Rock Mass Rating (RMR) from the results of the data from field, the total weights is = 46 so the rocks are at class III (moderate), with cohesion value 250 kPa and the friction angle is 30 o. The value of the slope safety factor pit B PT. Miyor Pratama Coal after using the slide programme V. 6.0 with method of Bishop has Safety factor = 2,093, and with Janbu method has safety factor = 2,180. From two methods include safe condition > 1.
Kajian Unsur Tanah Jarang (LTJ) Pada Lahan Bekas Tambang Timah dan Tambang Kaolin Kecamatan Merawang Kabupaten Bangka Delita Ega Andini; Guskarnali Guskarnali; Alfitri Rosita
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.595 KB) | DOI: 10.33019/promine.v7i1.1058

Abstract

Indonesia have natural resources in producing rare earth elements (REE). The abundance ofmineral resources in Bangka Island is related to the strategic geological position of BangkaIsland formed on the Southeast Asian Tin Belt (Cobbing, 2005). Geologically, the REEdeposits are associated with acid rocks (granitic) and phosphatic deposits. This studyfocuses on primary samples taken directly from ex tin mining area and ex kaolin mining inMerawang District, Bangka. The analysis of the sample uses X-Ray Fluorescence (XRF) tofind out the REE content are Ce, La, Nd, Sb, Sc, Sm, Te, Th, Y, and U. The analysis resultsshow that the spread of elemental content in the sample tends to have a relatively similarpresence. But in Sample 1 shows the Ce element is the dominant element that is equal to25.19 ppm, equivalent to 0.002% of its availability in sedimentary sand in the ex tin mining.while on the ex kaoline mining area the results of the analysis showed that there wasThorium (Th) content in Sample 3 of 70.05 ppm or 0.007% and was the highest contentcompared to other elements in all samples.
Penaksiran Endapan Timah Primer Menggunakan Metode Resistivitas dan Metode Geomagnetik Di Bukit Sambunggiri Kecamatan Merawang Kabupaten Bangka Mardiah Mardiah; Guskarnali Guskarnali
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.063 KB) | DOI: 10.33019/promine.v7i1.1063

Abstract

Cassitterit is a valuable mineral containing tin and other minerals as mining products in the Bangka Belitung Islands region. Sambung giri Hill, Merawang District, Bangka Regency is one of the places where primary tin deposits occur. Estimation of subsurface images can be interpreted using geophysical methods in the form of resistivity methods and geomagnetic methods. The measurement of resistivity method uses 6 lines with dipole-dipole configuration while the geomagnetic method with looping measurement technique as many as 13 lines with each line consists of several measurement points within 20 meters, consisting of 10 lines to the South-North direction, and 3 trajectories to the West- East. Based on the results of the study, the primary tin deposit estimation from the resistivity method in the form of a cross section of resistivity shows a low resistivity value (<700 Ohm.m) while the geomagentic method in the form of Reduction To Equator (RTE) shows a low geomagnetic anomaly (<0.8 nT). The spread of primary tin deposits is estimated to be found in the Northwest-Southeast direction.
Probabilistik Kelongsoran Lereng Tambang Terbuka Grasberg PT Freeport Indonesia Iswandaru Iswandaru; Rully Nurhasan R.; Made Astawa Rai; Ridho K. Wattimena
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.879 KB) | DOI: 10.33019/promine.v7i1.1064

Abstract

The stability of a slope in mining activities is highly influenced by geology, especially thenature of rocks and geological structures. Slope stability analysis will be faced with severalproblems in the uncertainty of rock properties and rock mass. Slope stability analysis usingprobabilistic methods offers a more systematic way of treating conditions of uncertainty andprovides other alternatives to the value factor approach to security regarding information onthe probability of a slope failure.Grasberg Open Mine rock type classification based ongeotechnical parameters or Geotechnical Rock Code (GTRCK) classifies rocks based onrock type, rock mechanical properties, hydrothermal alteration type, clay content and RockQuality Designation (RQD) to 46 types of GTRCK. The GTRCK type which has a low rockmass strength value is a change in intrusive rock minerals and a low RQD value such as alot of clay material is exposed in the Northeast and Southwest of the Grasberg Open PitMine.The overall slope probabilistic modeling of the Grasberg mine uses a cross section of220o (northwest) with the effect of a 0.02g seismic factor which is the maximum criterionaccording to the probability of slope failure received with the average FK 1.13 and PK 0%.
Studi Karakteristik Tailing Pada Lokasi Eks Penambangan Timah di Bukit Sambung Giri Kecamatan Merawang Kabupaten Bangka Irvani Irvani; Elsha Delvi Artasari
PROMINE Vol 6 No 2 (2018): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (573.854 KB) | DOI: 10.33019/promine.v6i2.1086

Abstract

Tailing deposits at the ex-tin mining area in Bangka and Belitung Island has a large number of economical residual minerals. This study is to identify tailing characteristic and its potential mineralogy and elements based on shallow hand boring (Auger) samples, along streamline in the west part of Sambung Giri Hill. Every coordinate sample plotted on the base map. Laboratory analysis using Stereo Microscope for identifying mineral characteristics, and geochemical analysis using XRF for identification of the presence of elements. The tailing deposits has laterally grain size gradation to downstream, composed above 94% sand fraction, and a small amount of shale and granule fraction. Quartz mineral presence more than 90%, followed by iron oxide (hematite), clay, zircon, cassiterite, ilmenite, monazite and tourmaline minerals, showed low consistency in lateral spatial except quartz, with its Rare Earth Elementh (REE) composition is Cerium (Ce), Lanthanum (La), Yttrium (Y), Neodymium (Nd) and Samarium (Sm).
Analisis Keamanan Tebing Pada Areal Bekas Tambang Di Desa Semaya, Kecamatan Randudongkal, Kabupaten Pemalang Rinal Khaidar Ali; Najib Najib; Adam Kahfi Mulyadi
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.261 KB) | DOI: 10.33019/promine.v7i1.1057

Abstract

Mining activities has become increasingly widespread in recent years, especially people’s mining, thatjust concerned about the result and not paying attention to the environmental factors.This is causedthe post mining area’s destruction and environmental degradation potential. For this reason, the slopesafety factor enhancement analysis on the post mining area in Semaya Village, Randudongkal Sub-District, Pemalang Regency is needed. Slope stability analysis using Slide 6.0 software to identify thecondition of post mining area from the results of undisturbed sample (UDS) laboratory data.Laboratory testing includes several aspects including water content, weight, specific gravity, grain size,atteberg limit test, and direct shear test. The value of the safety factor is 1,441, the value is in the safecategory because it passes the minimum value limit of the safety factor which is 1.25, this result isobtained from the terracing modeling.
Tingkat Kerusakan Lahan Akibat Penambangan Mineral Non-Logam dan Batuan di Daerah Semin, Kabupaten Gunungkidul, Daerah Istimewa Yogyakarta dengan Metode Analytical Hierarchy Process (AHP) Doni Ardiansyah; Wawan Budianta
PROMINE Vol 6 No 1 (2018): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.389 KB)

Abstract

Mining activities often cause land damage. Land damage can be monitored from time to time, so it canbe controlled and solved. This research was conducted in Semin, Gunungkidul Regency, SpecialRegion of Yogyakarta, from November 2017 until March 2018. Semin area consist of many miningactivities and also directly adjacent with Central Java Province in the east and north. Therefore, thestudy of land damage caused by mining activities in this area is very important. The purpose of thisresearch is to know and study the condition of land damage caused by current mining activities. Themethod used in this research is weighting method by using Analytical Hierarchy Process (AHP) tosome parameters which mostly refers to the Decision of Governor of DIY Number 63 year 2003 asobserved parameter, that is 1) The character of rock compilation of excavation, 2) rock fracturing level3) Utilization and management of top soil, 4) Depth of excavation / height of wall, 5) Limit of slope ofexcavation, 6) Reclamation time, 7) Amount of erosion, 8) River flow / sedimentation. The level ofdamage is divided into three, based on the value, that is 1) Good (1.00-1.66), 2) Medium (1.67 - 2.33),and 3) Damaged (2.34 - 3.00). Total mine sites observed were 81 mine sites. There are 10 mine sitesincluded in the Good category, 68 mine sites belonging to the Medium category, and 3 mine sites inthe Damaged category.
Pengaruh Struktur Kekar Terhadap Kestabilan Lereng Di PT. Energi Batubara Lestari Kalimantan Selatan Yudho Dwi Galih C; Arrina Khanifa
PROMINE Vol 7 No 1 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1599.03 KB) | DOI: 10.33019/promine.v7i1.1407

Abstract

PT. Energi Batubara Lestari ( EBL ) merupakan tambang batubara yang menggunakan sistemtambang terbuka, sehingga membutuhkan keamanan lereng untuk terciptanya lingkunganpenambangan yang aman dan kondusif. Penelitian ini bertujuan untuk menganalisis kemantapanlereng, dalam penelitian ini digunakan metode kesetimbangan batas. Keadaan geologi yang terdapatpada PT. EBL terdapat kekar, litologi pasir, pasir lepas, lempung dan batubara, kekar mempengaruhikestabilan lereng karena semakin banyak celah, air yang masuk akan semakin mudahmempengaruhi batuan yang lapuk sehingga mengalami kelongsoran. Kajian kemantapan lereng padasisi highwall sisi A-A’ mendapatkan nilai FK 1.851, sisi highwall sisi B-B’ didapatkan FK 1.676 dan sisihighwall sisi C-C’didapatkan FK 1.54 menandakan bahwa lereng highwall dalam kondisi aman. Danpada sisi lowwall sisi A-A’ didapatkan nilai FK 1.198 , pada sisi lowwall sisi B-B’ didapatkan nilai FK0.94, dan sisi lowwall sisi C-C’ didapatkan nilai FK 1.27, menandakan bahwa pada lereng lowwalldalam konidi kritis. Untuk membuat suatu lereng yang stabil atau aman dilakukan desain geometrilereng pada daerah lowwall dengan merubah tinggi dan overall slope sehingga didapatkan hasil FKantara lain : sisi desain A-A’ lereng lowwall 1.478, sisi desain B-B’ lereng lowwall 1.447 sedangkan sisidesain C-C’ lereng lowwall 1.497.
Kajian Kandungan Logam Berat Pada Sedimen Sungai Di Lokasi Penambangan Emas Tradisional, Desa Boto, Kecamatan Jatiroto Efendi Putra Dwijaya Pa; Wawan Budianta; Doni Prakasa Eka Putra
PROMINE Vol 7 No 2 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v7i2.1641

Abstract

Traditional and small-scale gold mining, known as ASGM (Small Scale Gold Mining), has been approved forpollution of the environment specifically for watersheds. This research was conducted in Boto Village,Jatiroto Subdistrict, Wonogiri Regency, Central Java Province. This study discusses the analysis ofcomposition and heavy metals and the factors that support heavy metals in the study site. The samplestaken were 22 samples along the river flow in the upstream and downstream areas. Tests of content werenot carried out by the ICP-AES method. Laboratory test results on river sediment samples were thenanalyzed statistically, geoaccumulation index and enrichment factors were calculated. Laboratory test resultsshow that most do not have heavy metal content exceeding the average concentration of heavy metals inriver sediments. The spread of heavy metals in river sediments in the study sites was found to be varied withdifferences in the upstream and downstream areas. In general, upstream areas have higher metal reservescompared to downstream. Distribution of heavy metals for everything that has not been planned, isprocessed by natural processes or human activities. Traditional mining activities contribute significantly incontributing to the addition of Hg, as well as contributing to the increase of other metals, most of which are inthe mineralized area, which fully contains high metal reserves.
Rancang Alat Magnetic Separator Untuk Meningkatkan Kadar Bijih Timah Di Laboratorium Teknik Pertambangan Universitas Bangka Belitung Janiar Pitulima; E.P.S.B Tamantono E.P.S.B Tamantono; Haslen Oktarianty
PROMINE Vol 7 No 2 (2019): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v7i2.1642

Abstract

Magnetic separator testing uses two variables, namely the speed of the roller on the conveyor belt andthe feed speed. Due to the minimum number of variations that can be used in magnetic separatortesting, roller speed testing is used at 0.6 m / s and 0.7 m / s. the variation of figures at the feedingspeed of 0.21 kg / s and 0.35 kg / s so that 8 samples obtained from the processing of a magneticseparator with 4 magnetic samples and 4 non-magnetic samples. The feed samples used wereprepared by drying and sifting into 3 size fractions to be used in the grain counting analysis process sothat the percentage of minerals contained in the sample were found: 15.82% Cassiterite, 63.95%Ilmenite, 6.09% Monazite, 0.48% Pyrite / Marcasite, 1.61% Zircon, 1.44% Topaz, 0.65% Tourmalineand 9.96% Quartz. The effect of roller speed on the increase tin ore content is still common, this isbecause there are not many experiments carried out so that taking the trend of the influence of theroller speed is too fast. The effect of feed speed, the greater the feed speed on the magneticseparator, the smaller the tin ore content obtained.

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