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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 6 Documents
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Search results for , issue "Vol 8 No 2 (2020): PROMINE" : 6 Documents clear
Kinerja Unit Crushing Plant dalam Pengolahan Batuan Andesit Di Pt Bukit Asam, Tbk. Tanjung Enim, Sumatera Meutia Diani Amdi; Mukiat S; Yunita Bayu Ningsih
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.v8i2.1986

Abstract

Meningkatnya pembangunan di kota Palembang beberapa tahun belakangan, membuat kebutuhan material konstruksi juga meningkat. Adanya andesit di daerah Tanjung Enim, seharusnya bisa menjadi pemasok batu split untuk daerah Palembang. Agar beton yang dihasilkan memiliki kualitas baik, ukuran batu split harus mengacu pada standar industri Indonesia. Untuk memenuhi standar tersebut, batu andesit hasil penambangan perlu diolah dan mengalami proses reduksi ukuran kemudian dianalisis agar memenuhi standar. Ukuran produk hasil pengolahan berkorelasi dengan kinerja unit crushing plant. Penelitian ini bertujuan untuk mengetahui pengolahan batu andesit serta menganalisis produktivitas crushing plant dan menganalisis kualitas hasil pengolahan. Penelitian dilakukan dengan mengamati kinerja unit crushing plant serta dilakukan analisis uji ayakan untuk mendapatkan nilai modulus kehalusan. Kemudian membandingkan nilai modulus kehalusan yang diperoleh dengan standar indonesia yang berkisar antara 6-7,10. Dari hasil penelitian diketahui produktivitas aktual unit crushing plant sebesar 142,1685 ton/jam dengan nilai ketersediaan alat kurang dari 64%. Berdasarkan uji analisis ayakan, didapatkan nilai modulus kehalusan sebesar 7,66 dan belum memenuhi standar industri Indonesia. Hasil dari pemecahan sangat beragam sehingga pada pengolahan batu andesit diperlukan unit secondary crusher.
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.

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