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Jurnal Geomine
Published by Universitas Muslim Indonesia
ISSN : 24432083     EISSN : 25412116     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Jurnal Geomine (JG) merupakan jurnal yang memuat artikel-artikel ilmiah yang mengkaji ilmu-ilmu dan pengembangan dalam bidang pertambangan, geologi dan geofisika. Jurnal Geomine (JG) memiliki No.ISSN : 2443-2083 (Cetak) dan No.ISSN : 2541-2116 (Online). Jurnal Geomine diterbitkan oleh Prodi Jurusan Teknik Pertambangan Fakultas Teknologi Industri Universitas Muslim Indonesia. Terbit 3 (tiga) kali dalam setahun pada Bulan April, Agustus dan Desember.
Arjuna Subject : -
Articles 230 Documents
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Kajian Potensi Logam Tanah Jarang dari Abu Batubara Limbah PLTU Mulut Tambang Bangko Barat firman ode Imanulhaq; Firman Nullah Yusuf; Arbi Haya; Amsal Amsal
Jurnal Geomine Vol 8, No 3 (2020): Edisi Desember 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i3.636

Abstract

Abu batubara limbah PLTU Mulut Tambang Bangko Barat di Kabupaten Muara Enim, baik fly ash maupun bottom ash jumlahnya sangat banyak dan belum termanfaatkan maksimal. Abu batubara memiliki kandungan logam tanah jarang sehingga perlu dilakukan kajian potensinya untuk menjadi sumber daya dan cadangan LTJ dimasa depan. Tahapan dari penelitian ini adalah preparasi sampel dan pengujian distribusi ukuran butir dengan metode ayak basah dan kering. Morfologi butir diamati dengan mikroskop bijih serta penentuan kandungan mineralogi dengan XRD, kandungan oksida dengan XRF dan kandungan unsur dengan ICP-MS. Distribusi ukuran butir abu batubaranya 79,72%-98,16% lolos ayakan No.200 (0,074 mm). Morfologi butirnya berbentuk sub-rounded dan masih ada batubara yang belum terbakar sempurna. Kandungan mineralnya yang dominan adalah kuarsa, mineral minor seperti muskovit, hematit, magnetit, pirit, lime dan periclase. Oksida yang dominan adalah SiO2, Al2O3, SO3, Fe2O3, CaO dan MgO. Berdasarkan hasil uji ICP-MS terdeteksi 16 unsur LTJ. Kandungan total LTJ setiap sampel, FA BB dan BA BB berturut-turut yaitu 263,92 ppm dan 105,99 ppm. LTJ dari abu batubara PLTU Mulut Tambang Bangko Barat yang potensial diekstraksi adalah  serium kadarnya 84,8 ppm, neodimium 42 ppm, itrium 40,6 ppm dan lantanum 33,6 ppm dari fly ash sedangkan pada bottom ash hanya serium yang kadarnya 38,1 ppm.
Ekstraksi Informasi dari DEM untuk Pemetaan Struktur Geologi Studi Kasus di Daerah Kokap, Kulon Progo Bayu Raharja; Agung Setianto; Anastasia Dewi Titisari
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.483

Abstract

Digital elevation model (DEM) data can be used as an input for interpreting geological structures, especially faults. This study aims to determine of extracting geological information from SRTM DEM for geological structure interpretation. Information such as shaded relief, lineament, slope, aspect, drainage network and curvature were used as input for the interpretation using the morphological approach which includes processes, materials, and structures. The vertical exaggeration and sun azimuth and altitude for relief illumination can be varied to obtain different images with different enhanced features. Lineaments can be automatically extracted from the shaded relief. The results showed that the combination of shaded relief, lineament, slope, aspect, drainage network and curvature can be a powerful tool for geological structure interpretation. In general, DEM data analysis can only determine indications of fault location, whereas the types and directions of faults cannot be interpreted.
Analysis of Reinforcement System (Rock Bolt and Shotcrete) Effect on The Pillars Strength in Underground Mining Using Physical Models Testing in Laboratory La Ode Dzakir; Made Astawa Rai; Nuhindro Priagung Widodo
Jurnal Geomine Vol 9, No 1 (2021): Edisi April 2021
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v9i1.801

Abstract

The effects of reinforcement system on pillars were tested in laboratory, using three types of pillars with different strengths. The tests were performed using the UCS machine, to test pillar without reinforcement, pillar with rock bolt reinforcement, pillar with shotcrete reinforcement and pillar with the combination of both rock bolt and shotcrete reinforcement. Uniaxial compressive strength (UCS) testing aims to determine the effects of the reinforcement system on pillar strength. The results of this study indicate that the reinforcement system on high strength pillars causes a strength increase of 14.93% on pillar with rock bolt reinforcement, 21.45% on pillar with shotcrete reinforcement and 34.67% on pillar with combination of rock bolt and shotcrete reinforcement. On medium strength pillars, reinforcement installation shows a strength increase of 16.27% on pillar with reinforced rock bolt, 19.83% on pillar with reinforced shotcrete and 44.40% on pillar with combination of rock bolt and shotcrete reinforcement. Likewise, on low strength pillars, reinforcement installation causes a strength increase of 13.13% on pillar with reinforced rock bolt, 36.21% on pillar with reinforced shotcrete and 53.85% on pillar with combination of rock bolt and shotcrete reinforcement. The results of laboratory testing and numerical modeling indicate that the increase in strength occurs because the horizontal displacement on the surface of the pillar wall is detained by shotcrete and faceplate on rock bolt, so that the pillar seems to have confining pressure throughout the pillar wall surface, which is called as equivalent confining pressure.
Analisis Ketebalan Bawah Permukaan Endapan Mineral Grafit Alam di Kelurahan Watuliandu, Kecamatan Kolaka, Kabupaten Kolaka Asfar, Suryawan; Okto, Ali; Jahidin, Jahidin; Alfirman, Alfirman; Jurzan, La Ode Ihksan; Hadiyanto, Yoko
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.560

Abstract

The graphite mineral resource is one of the minerals contained in the region of Southeast Sulawesi Province. The research activity was undertaken in Watuliandu Village area, District Kolaka Kolaka, Southeast Sulawesi Province. The purpose of this study is to determine the depth and thickness of the subsurface mineral deposits natural graphite, so as to achieve the goal researchers used survey method by utilizing the techniques of observation and data collection directly in the field in the form of measurements of geoelectric resistivity configuration using Schlumberger with the number of passes the measurement of 3 ( three) path and the path length reaches 200 meters and the track surface elevation measurements ranging from 12-56 meters above sea level. Based on the results of measurement and data analysis showed that the type of subsurface lithology encountered rock consists of compact schist, gneiss, schist and graphite, in which each lithology encountered rocks have resistivity values that vary where to compact schist layers ranging from 1,065.65 to 2,065.28 Ωm, gneiss rock layers around 5,506.71 Ωm and graphite schist rock layers ranges from 83.26 to 468.50 Ωm. Based on the analysis of resistivity in mind that natural graphite mineral deposits found in the layers of graphite schist, which is predominantly found on the track 2 with a layer depth ranges from 0 - 35 meters, as well as sediment thickness to ± 35 meters.
Kondisi Resirkulasi Udara terhadap Penurunan Sumber Panas di Dalam Tambang Bawah Tanah Ririn Yulianti; Nuhindro Priagung Widodo; Rudy Sayoga Gautama
Jurnal Geomine Vol 8, No 3 (2020): Edisi Desember 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i3.648

Abstract

Kondisi yang sering terjadi di dalam tambang adalah banyaknya penggunaan kipas lokal ventilasi yang menyebabkan perputaran balik udara (resirkulasi). Hal ini tentu saja dapat menjadikan kondisi lingkungan kerja panas. Diperlukan suatu model yang dapat menggambarkan pergerakan udara, sehingga kita dengan mudah mengetahui kondisi kerja jaringan ventilasi di dalam tambang. Penelitian dilakukan pada lokasi kerja yang penggunaan jumlah kipas lokal cukup banyak namun hasil pengukuran temperaturnya tinggi. Setelah dilakukan analisis simulasi permodelan jaringan ventilasi bahwa terjadi resirkulasi udara sebesar 50%. Hal ini menjadikan pengaruh terhadap penurunan lamanya sumber panas yang beroperasi, terbukti dari hasil analisis yang dilakukan secara pendekatan numerik bahwa temperatur udara akan meningkat ketika sumber panas beroperasi sebesar ±2°C (32,6°C menjadi 34,5°C) hanya dalam waktu 1,5 jam. Temperatur udara akan kembali turun ketika sumber panas berhenti beroperasi berkisar rata-rata 0,1°C/jam.
Analisis Pengaruh Waktu Pengadukan Terhadap Penetralan Asam Menggunakan Batugamping Dengan MetodE ABCC Firman Firman; Dewy Kumala Tehuayo; Nurliah Jafar; Habiebie Anwar; Suriyanto Bakri; Abdul Salam Munir; Harwan Harwan; Sitti Riatmi Nurhawaisyah; Firman Nullah Yusuf
Jurnal Geomine Vol 9, No 1 (2021): Edisi April 2021
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v9i1.900

Abstract

Air asam tambang adalah air yang terbentuk akibat dari kegiatan penambangan dengan pH rendah (pH 6) sebagai dampak dibukanya suatu potensi keasaman batuan, sehingga menimbulkan permasalahan terhadap kualitas air dan tanah, dimana pembentukannya dipengaruhi oleh tiga faktor utama yaitu air, oksigen, dan batuan yang mengandung mineral-mineral sulfida. Metode acid buffering characteristc curve (ABCC) melibatkan titrasi lambat sampel dengan asam sambil terus memantau pH. Material yang digunakan dalam proses pengolahan air asam tambang adalah bahan yang memiliki alkalinitas seperti batugamping. Penelitian ini bertujuan untuk mengetahui pengaruh waktu pengadukan pada proses penetralan asam. Berdasarkan hasil pengujian dengan menggunakan variabel waktu pengadukan 1, 3 dan 5 menit didapatkan pH awal untuk waktu 1 menit (pH awal 8,45, pH akhir 6,01), waktu pengadukan 3 menit (pH awal 8,51, pH ahir 6,23) dan waktu pengadukan 5 menit (pH awal 8,68, pH ahir 6,71). Dari hasil pengujian kualitas tersebut dapat diketahui bahwa variabel waktu dapat mempengaruhi proses penetralan asam. Semakin lama waktu pengadukan maka waktu (kecepatan) reaksi antara batugamping dengan air asam tambang akan semakin lama sehingga kualitas air yang dihasilkan akan semakin baik pula (pH semakin tinggi).
Analisis Variography pada Estimasi Ordinary Kriging Endapan Batubara Di Kecamatan Murung Pudak, Kabupaten Tabalong, Provinsi Kalimantan Selatan Vina Wulandari; Romla Noor Hakim; Hafidz Noor Fikri
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.561

Abstract

A functional analysis of the determination of the variogram value is very influential on the coal model formed (variography analysis). Variography is a series of activities ranging from data searching, modeling to analysis reports. Coal quality estimation is an activity to get a proper distribution of coal quality values, and the results can contribute as one of the control processes in coal mining activities. This research aims to estimate coal parameters (Ash Content, Calorific Value, Total Moisture, and Total Sulfur) using Ordinary Kriging. Comparison of Ordinary Kriging estimation variogram model with omnidirectional and omnidirectional-vertical model variogram results in the conclusion that the vertical variogram is quite capable of giving a positive effect on the Ordinary Kriging estimation results seen from the residual value of the results of cross-validation, although in general, the distribution of Ordinary Kriging results is not too much different.
Mineralization Study of Volcanic Rocks in Colo Volcano Tojo Una-Una Central Celebes Asrafil Asrafil; Teguh Hilmansyah; Muslimin U Botjing; Eka Yuliastri
Jurnal Geomine Vol 8, No 3 (2020): Edisi Desember 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i3.705

Abstract

Colo Volcano is an active volcano located on Una-Una Island, Tojo Una-Una Regency, Central Sulawesi Province. Volcanism and magmatism of Mount Colo are still in progress, and this has certainly triggered mineralization in volcanic rocks which is interesting for study. This research aims to reveal the mineralization characteristics of volcanic rocks in the study area. This research was conducted through investigative methods in the form of field observations and laboratory through petrographic and rock chemistry (X-Ray Defraction analysis) to reveal the presence of alteration minerals as a characteristic of mineralization. The results of this study indicate that the volcanic rocks present are tuff and volcanic breccia in the form of pyroclastic deposits associated with alluvial material and andesite rocks. Identification of alteration minerals through XRD test shows the presence of hydrothermal alteration minerals with a formed temperature of 300 ° C such as Quartz, Calcite, Clinochlore, Albite, Dickite, Andesine, and K-Feldspar which are classified into Argillic and Propylitic alteration types.
Karakteristisasi Petrografi dan Geokimia Batubara Formasi Bobong Daerah Taliabu, Provinsi Maluku Utara Supardin Nompo; Donatus Hendra Amijaya; Ferian Anggara
Jurnal Geomine Vol 9, No 1 (2021): Edisi April 2021
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v9i1.764

Abstract

Formasi Bobong yang melampar di daerah Pulau Taliabu merupakan formasi pembawa batubara yang berumur jura. Penelitian ini bertujuan untuk menganalisis karakteristik petrografi organik dan geokimia di daerah penelitian. Metode yang digunakan meliputi observasi lapangan dan pengambilan sampel batubara dengan metode channel sampling ply by ply. Analisis laboratorium yang dilakukan terhadap 10 sampel batubara meliputi analisis petrografi organik, proksimat, ultimat, gross calorific value (nilai kalori). Batubara Formasi Bobong terdiri dari 3 seam, yaitu seam 1 dengan ketebalan 0,5 m hingga1 meter, seam 2 dengan tebal 1 meter dan seam 3 dengan tebal 0,50 m hingga 0,90 meter. Ketiga seam batubara tersebut secara dominan termasuk dalam litotipe bright coals dan banded bright coals. Batubara tersebut memiliki gross calorific 13.896,26-15.362,54 (Btu/lb) dan nilai proksimat berupa karbon tertambat 36,10 - 43,86 (%, adb), kandungan zat terbang 38,25 - 47,91 (%, adb), kandungan air 6,54 – 12,23 (%, adb) dan kandungan abu 64,46 - 21,31 (%, adb). Batubara seam 1,  seam 2 dan seam 3 di daerah penelitian merupakan high volatile A bituminous coals. Ultimat pada batubara Formasi Bobong adalah karbon 64,46 - 74,75 (%, daf), hidrogen 6,27 - 6,92 (%, daf), nitrogen 0,76 - 0,87 (%, daf), sulfur 4,41 - 7,93 (%, adb) dan oksigen 9,45 - 18,07 (%, daf). Sedangkan untuk nilai maseral berupa vitrinit adalah 69,75 – 77,52 (%, vol), liptinit 17,56 - 22,50 (%, vol) dan inertinit 3,60 - 7,75 (%, vol). 
Penentuan Hiposenter Dan Mekanisme Fokus Gempa Bumi MLv4,8 1 Januari 2015 Di Sekitar Sesar Matano Muhammad Fawzy Ismullah Massinai; Muhammad Altin Massinai; Aulia Puji Astuti; Nurainun Sholihat Arifuddin
Jurnal Geomine Vol 8, No 2 (2020): Edisi Agustus 2020
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jg.v8i2.612

Abstract

Earthquake was recorded by BMKG on Thursday January 1, 2015 at 22:20:04.8 GMT or Friday January 2, 2015 at 06:20:04.8 Central Indonesia Time. Hypocenter located at 120.87 E, 2.22 S with depth of 17 km and magnitude MLv4.8. Purpose of this research is to study fault plane mechanism that cause this earthquake using hypocenter and focal mechanisms. This research used waveform MLv4.8 January 1, 2015 which recorded at BMKG earthquake observation stations. Waveform is processed to obtain arrival time P- and S-wave and polarity of arrival time P-wave. Method used to determine hypocenter is Geiger Method with input are arrival time P- and S-wave. Focal mechanisms determined using the first polarity of arrival P-wave and hypocenter from previous step. Hypocenter obtained from this research is located at 2.2073 S, 120.798 E and 10 km depth. RMS is 0.7391. Focal mechanism of this earthquake is oblique fault, is normal fault with left-lateral strike slip component. Parameters are strike 3120, dip 710 and rake -140. This result is consistent with Matano Fault type as a continuation of Palu-Koro Fault. MLv4.8 January 1, 2015 earthquake occurred because Matano Fault activity. Research results can provide a basis form earthquake hazard mitigation along Matano Fault zone.

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