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JURNAL TEKNOLOGI MINERAL FT UNMUL
Published by Universitas Mulawarman
ISSN : 28087305     EISSN : 28087305     DOI : http://dx.doi.org/10.30872/jtm.v11i2
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering
The article can be a product of researches, scientific thoughts, or case studies with a scope in the field of earth science, including: mining engineering, geology, geodesy, geophysics, and petroleum. The author may write an article by the template and submit the article online by using the OJS system. Any matters relating to the use of the software, citation and copyright permissions made by the author of the article, and the legal consequences it causes, are the sole responsibility of the author of the article.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 133 Documents
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Estimasi Sumberdaya Andesit Dengan Metode Geolistrik Resistivity 2d Di Kabupaten Kulonprogo D.I.Y Kelvin Zain; Nurkhamim Nurkhamim; Aldio Kresna Pambayu; Faizal Agung Riyadi; Oktarian Wisnu Lusantono
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 14, No 1 (2026): Jurnal Teknologi Mineral FT UNMUL Juni 2026
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v14i1.25218

Abstract

Andesite is a vital industrial mineral commodity widely utilized as construction material, necessitating accurate information regarding its geometry and resource potential. To address the data requirements for construction material exploration, a geophysical investigation was conducted to estimate andesite resources using the 2-dimensional (2D) geoelectrical resistivity method in Dukuh Gunung Kukusan, Hargorejo Village, Kokap District, Kulon Progo Regency, Special Region of Yogyakarta. Field data acquisition was carried out on four survey lines utilizing the Wenner-Schlumberger configuration. The data processing stage involved 2D inversion using RES2DINV software, followed by 3-dimensional block modeling via Geosoft Oasis Montaj for volume calculation. Interpretation results indicate that fresh andesite is characterized by relatively high resistivity values, ranging from 1000–1870 Ωm, whereas weathered andesite is characterized by lower resistivity values, ranging from 300–800 Ωm. Fresh andesite is identified starting at an average depth of ± 15 meters below the surface, exhibiting a distribution pattern extending from Southwest to Northeast, which aligns with the regional geological structure. Based on 3-dimensional modeling, the estimated volume of fresh andesite resources is 95,875 m3 and the volume of weathered andesite is 160,125 m3. The results of this study are expected to provide valuable preliminary information for planning the utilization of andesite resources and serve as a reference for the application of the 2D electrical resistivity method in the exploration of construction rocks.
Analisis Produktivitas Alat Angkut Dump Truck Liugong DW90A dan Hino 500 pada Product Coal Stockpile PT. Victor Dua Tiga Mega Site Luwe Hulu Kab. Barito Utara Prov. Kalimantan Tengah Gokma Rohartama Gultom; Agus Winarno; Rety Winonazada; Windhu Nugroho; Henny Magdalena
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 14, No 1 (2026): Jurnal Teknologi Mineral FT UNMUL Juni 2026
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v14i1.26988

Abstract

Produktivitas alat angkut adalah besarnya produksi yang dapat dicapai dalam kenyataan kerja alat angkut berdasarkan kondisi yang dicapai saat ini. Ada beberapa faktor yang menyebabkan tidak tercapainya target produksi batubara diantaranya alat angkut tidak dalam kondisi baru sehingga sering mengalami breakdown dan perbaikan ditengah kegiatan produksi yang sedang berlangsung. Selain itu hal ini juga disebabkan oleh beberapa faktor seperti ketidakserasian kerja alat angkut, waktu kerja kerja yang tidak optimal dan efisiensi kerja alat mekanis. Metode yang digunakan dalam penulisan yaitu dengan pendekatan masalah yang berupa pengambilan bahan, baik berupa dasar teori maupun data-data objek yang diamati secara langsung dilapangan. Sehingga dilakukan dalam beberapa tahapan yang meliputi tahap pra lapangan, tahap lapangan, dan tahap pasca lapangan.Berdasarkan analisis yang dilakukan maka diperoleh produktivitas teoritis, alat angkut jenis Hino 500 dan Liugong secara berturut turut adalah 21 m3/Jam dan 25 m3/Jam. Produktivitas aktual alat angkut Hino 500 dan Liugong secara berturut turut adalah 5 m3/Jam dan 7 m3/Jam.
Perbandingan Hasil Pengukuran Volume Overburden Dengan Unmanned Aerial Vehicle Dan Total Station Harjuni Hasan; Reonaldo Purba; Aprisal Aprisal
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 14, No 1 (2026): Jurnal Teknologi Mineral FT UNMUL Juni 2026
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v14i1.27387

Abstract

Current volume measurement and calculation with the total station still utilize human plotting, in which surveyors are required to measure plots to obtain coordinate data. This process is time-consuming and costlier. However, technological advancement has allowed the use of unmanned aerial vehicles, or drones, to measure the overburden volume. More than nine images’ overlappings were identified based on the color, and the entire block was in the blue color, meaning that all blocks overlapped in more than nine aerial images. The use of seven GCPs showed horizontal and vertical Root mean square error (RMSE) values of 0.08 and 0.16 meter, respectively. The value was lower than the use of 5 and 3 GCPs, indicating that more GCPs may lead to better RMSE values and affect the Circular (CE90) and linear error (LE90) values.  Values obtained using seven GCPs meet the class-2 standard of a 1:1000 map with a contour interval of 0.14. Meanwhile, using 3 GCPs meets only the class-2 standard of a 1:25000 map with a 10-meter contour interval, and using 5 GCPs meets the class-2 standard of a 1:1000 map with a 0.4-meter contour interval. The calculated overburden volume based on aerial photos with seven GCPs in blocks I, II, and III was 47.22.74 BCM, 8251.22 BCM, and 7089.49 BCM, respectively. Meanwhile, that of the total station for the same blocks was 45250.00 BCM, 8127.65 BCM, and 6827 BCM, respectively.

Page 14 of 14 | Total Record : 133

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