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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 120 Documents
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Effect of Porosity on Uniaxial Compressive Strength in Sedimentary Rocks Andesta Granitio Irwan
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2057

Abstract

The rock strength parameter is an important factor used in determining the geotechnical design in determining the stability of the underground slope or mine. One of the rock strength tests in the laboratory (intact rock) is the uniaxial compressive strength test. One of the factors that influence rock strength is the porosity of the rock itself, especially in sedimentary rocks. The rock porosity test is carried out by testing the physical properties of the rock, then a regression analysis is carried out to obtain the correlation of the effect of porosity on rock strength and the correlation between porosity and absorption considered in the analysis. The linear regression results obtained between porosity and saturated water content of rocks showed a positive correlation where the increase in porosity, the saturated water content also increased. The correlation between porosity and uniaxial compressive strength obtained a strong correlation with the power regression model as the best model compared to other regression models because it has the lowest error based on the Root Mean Square Error (RMSE). The final result is obtained by comparing the effect of porosity on rock strength, that is the higher the porosity value have the smaller porosity, so that an increase in rock porosity will reduce the strength of the rock.
Tingkat Kerusakan Lahan Akibat Penambangan Mineral Non-Logam dan Batuan di Daerah Semin, Kabupaten Gunungkidul, Daerah Istimewa Yogyakarta dengan Metode Tanpa Pembobotan Doni Ardiansyah
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2059

Abstract

Mining activities are often blamed for causing land damage. Land damage that occurs can be monitored, so it can be controlled and repaired. This research was conducted in the Semin area, Gunungkidul Regency, Yogyakarta Special Region, from November 2017 to March 2018. The Semin area has a lot of rock mining activities and in border of provinces. Therefore, the study of land damage caused by mining activities in this area is deemed very important. The purpose of this study was to determine and study the conditions of land damage caused by mining activities during the research period. The method used in this research is a weightless method from several parameters which mostly refers to the Yogyakarta Governor Decree Number 63 of 2003 as the observed parameters, that is 1) The character of rock compilation, 2) rock fracturing level 3) Utilization and management of top soil, 4) Depth of excavation / height of wall, 5) Limit of slope of excavation, 6) Reclamation time, 7) Amount of erosion, 8) River flow / sedimentation. The data is processed by using the weightless method, where all parameters have the same weight. The level of damage is divided into three, based on the value, namely 1) Good (1.00-1.66), 2) Medium (1.67 - 2.33), and 3) Damaged (2.34 - 3.00). The total observed mine sites were 81 mine sites. There are 21 mine sites that are included in the Good category, 60 mine sites that are included in the Medium category, and no mine sites are in the Damaged category
Ekstraksi Kitosan dari Limbah Cangkang Udang sebagai Adsorben Ion Logam Cu pada Air Kolong Timah Bangka Herman Aldila
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2070

Abstract

This study aims to analyze the effect of NaOH concentration on deacetylation step on the chitosan adsorption for Cu metal ions in Bangka tin kolong’s water. Extraction of chitosan was carried out in four steps: deproteinization, demineralization, decolorization and deacetylation of chitin. The effect of NaOH concentration on deacetylation process was studied. The results shown that the increase of NaOH concentration from 20% to 60%, the chitosan DD increased. The diffusion rate of OH- causes increment of OH- attack to the amino group thus realizing the effective deacetylation of chitin. The metal content of Cu in this study reached 0.32 ppm. Adsorption of chitosan on cu metal ions reduced the dissolved levels reaching an average of 99.67% from the initial content. The content of the hydroxyl group in chitosan causes the forming reaction of hydroxide compounds from dissolved Cu metal ions. The Cu hydroxide compound will separately form and form a precipitate. The greater the deacetylation degree value lead increase of hydroxyl group content and causing the increase of Cu metal ions adsorption.
Identifikasi Potensi Acid Rock Drainage Pada Tambang Timah di Pulau Bangka Delita Ega Andini; Fajar Indah Puspita Sari
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2136

Abstract

Bangka Belitung is one of the tin-producing areas in the world which is characterized by the large number of granite rocks in the area as the rock carrying cassiterite minerals. Granite rocks found on Bangka Island are rocks formed due to magma activity from acidic volcanic processes. The availability of acidic water is possible due to the presence of acid-carrying minerals from granite which causes acid rock drainage or acid rock water which generally occurs in mining areas, ex-mining and exploration in tin mines. Before making efforts to prevent environmental pollution, identification is needed regarding the potential acidity of the rock so that the pH and dissolved metal content that endangers survival can be prevented to a minimum.
Analisis Rekah Tarik Lereng Sidewall Penambangan Blok Menyango Berdasarkan Reliabilitas Kemantapan Lereng Menggunakan Metode Finite Difference Novandri Kusuma Wardana
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2142

Abstract

Probability analysis is method in geotechnical parameter to solve problem on the stability of the mining slope. It explains values of distribution parameters based on data type of laboratory test results and field investigations result as a back analysis of the mining slope. Sidewall slopes had sliding plane due to tension crack as wide as 18 cm with a length of 150 meters had potential failure, so back analysis of slope stability is needed. Condition of uncertainty the rock of the slope when the increase saturation level 23% so that it gives a greater water pore pressure. Slopes with a geometry of sidewall 10 m high and a single slope angle of 50 ° require redesign of a height of 7 meters and a single slope angle of 42 °. The results of FK calculations obtained for the IRA slope were 1.24 with a probability of failure of 23.12% and the overall slope with FK 1.31 with a probability of failure of 18.27%. The results of the distribution of random variables using Chi - Square obtained Normal and Lognormal distributions for sandstones, Normal and Exponential distribution for claystone, and Lognormal distribution for siltstone.
Analisis Flyrock Untuk Mengurangi Radius Aman Alat Pada Peledakan Batuan Andesit Di Kecamatan Margaasih, Kabupaten Bandung, Provinsi Jawa Barat Shilvyanora aprilia rande; Ardila Yulianti
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2025

Abstract

Bandung regency known to have had to scatter material which be potential sources of revenue of them are material andesit mining sand and also .Research objectives is measuring the estimation of the distance the throw rocks due to maximum blasting , restudying in the determination of a radius of secure at blasting activities by counting the radius of safe to an instrument based on a theory that is compared with actual that had broken out and get constant k in signification fly rock according to alan b.richards and adrian j.moore to adjust to those of the rocks and stemming used .The research was done by counting the throw of maximum rock theoretically menutut alan b .Ricahrds and adrian j .Moore coupled with the observation actual fly rock in the field with the observation use video and the naked eye .Trial done by moving a radius of safe instrument less than 300 m. From the trial data, it is obtained that the maximum throw of the actual rock and the prediction with the theoretical calculation is in accordance with the recommendation of Adrian J. Moore and Alan B. Richard, so the radius to secure the tool is at least 2 times that of the actual throw. With the provision of using stemming, the safe radius for blasting is reduced to 200 m.
Geologi, Karakteristik Alterasi Hidrotermal dan Mineralisasi Bijih pada Pit Purnama Martabe, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara Theresia Fernandha Samuels; Arifudin Idrus
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2118

Abstract

High demands of metal such as gold, silver, and copper, also their limited occurances causing an understanding of geological conditions, alteration and ore mineralization characteristics are needed for a sustainable exploration. This study aims to elucidate geological conditions, characteristics and the distribution of alteration zones and ores mineralization in Purnama Martabe Pit based on geological mapping, drill cores logging and sampling. Selected samples were analysed by XRF (X-Ray Fluorescenes), ASD (Analytical Spectral Devices), petrography, and mineragraphy analysis. Lithological units at the study area consist of andesite lava unit, diorite intrusion dome and polymictic phreatomagmatic breccia units. Based on ASD analysis, alteration zones in the study area are vuggy-massive silica, silica+dickite±alunite, illite+smectite, and smectite+chlorite. Based on mineragraphy and XRF, the mineralization occurred at the study area is composed of pyrite, enargite, hematite, goethite, and jarosite. Zonation and distribution of alteration and mineralization is predominantly controlled by the north east – south west structure in the form of quartz veins, north west – south east structure, and various porosities of the lithological units.
Analisis Kebutuhan Airflow Budget Di Level Extraction Pada Tambang Bawah Tanah Di Area Deep Mill Level Zone (Dmlz) PT. Freeport Indonesia Timika Papua Yudho Dwi Galih Cahyono; Avellyn Shinthya Sari; Billi Hanok Wambukomo
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2272

Abstract

Freeport Indonesia (PTFI) is a mining company that is an affiliate of Freeport-McMoran Copper & Gold Inc. (FCX) and PT Indonesia Asahan Aluminum (Persero) (Inalum). As of 2019, the Government of Indonesia has taken over 51.23% of shares (41.23% Inalum, 10% Regional Government of Papua). The research methods used in this activity are observational and comparative methods. In analyzing the calculation factors of design budget criteria. The data obtained will be used to compare direct field observation data with monthly report data from the company and equalize it with the air standard for underground mine ventilation based on the Decree of the Minister of Mines and Energy No. 1827 K / 30 / MEM / 2018. Calculation of airflow budget for the equipment used In the calculation and processing of airflow budget data is the R1600 LHD loader, the results of the Utilization Factor for 1 year are obtained by regulation of the Government of PT. Freeport itself uses in accordance with the regulations, namely 0.067 multiplied by 208Kw from the R 1600 LHD tool, obtaining an average 0.302 Maximum 0.482 Minimum 0.033 With a total air supply into the DMLZ mine of 1338 m3 / s, this is very sufficient from the results of the total air demand based on the airflow buget design in accordance where is 1095.6 m3 / s. In underground mining, DMLZ is in accordance with the regulation of the Decree of the Minister of Energy and Mineral Resources of the Republic of Indonesia Number 1827 K / 30 / MEM / 2018
Investigasi kondisi airtanah dengan geolistrik: studi kasus endapan aluvial di Bengalon Kutai Timur, Provinsi Kalimantan Timur Indonesia Shalaho Dina Devy; Ibnu Hasyim
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2306

Abstract

Bengalon is located in East Kutai Regency, East Kalimantan Province. Bengalon is included in the Samarinda-Bontang groundwater basin. The development of agricultural and industrial areas, followed by an increase in residential areas, will cause an increase in the water demand. This study aims to determine the groundwater potential of alluvial areas using the resistivity geoelectric method. The resistivity survey resulted in subsurface lithology, shallow groundwater conditions in the form of depth, thickness, and location of the aquifer as well as the type of groundwater quality. There are 10 locations for geoelectric data collection using the 2D geoelectric method. The results showed that the majority of the aquifers were alluvial deposits consisting of sand and sandy clay. The resistance indicating groundwater is 1 - 4 Ω m, at a depth of 10 – 50 m with a thickness varying from 10 – 20 m which has been dominated by sand. The presence of sea water intrusion in aquifers causes the quality of groundwater to tend to be brackish because the research location is in a swamp area bordering the coast.
Pemetaan Sebaran Kadar Besi Pada Endapan Laterit Nikel Menggunakan Metode Interpolasi Indikator Kriging dan Ordinary Kriging Hendro Purnomo
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2316

Abstract

Beside containing nickel (Ni), nickel laterite deposits also contain other elements, including iron (Fe) which have varying levels in each layer. In this study, the distribution of Fe content in the limonite layers was carried out using the indicator kriging method to analyze the probability distribution of iron levels and ordinary kriging to analyze the variability of iron levels spatially. Fitting the variogram was undertaken by using spherical, exponential and gaussian models. The selection of the best variogram model was carried out based on the smallest root mean square error (RMSE) value, while the estimation of resource potential was calculated by the polygon extended area method. The results of the interpolation show that the distribution of iron anomaly occupies ± 83,3% of the research area with a potential resource of ±64.522.110 ton of iron. The evaluation of the interpolation results base on the root mean square standardized prediction error (RMSP) indicates that the estimation results of iron content using the ordinary kriging method are underestimated.

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