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All Journal Jurnal Riset Teknik Pertambangan Bandung Conference Series: Mining Engineering ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Noor Fauzi Isniarno
Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Islam Bandung
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Kajian Ekonomi Pengupasan Overburden Berdasarkan Evaluasi Cost Control Penambangan Batubara Widya Mastari; Zaenal; Noor Fauzi Isniarno
Jurnal Riset Teknik Pertambangan Volume 5, No. 1, Juli 2025, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v5i1.6566

Abstract

Abstract. PT Long Daliq Primacoal is a coal mining contractor operating at PT Banjarsari Asli's IUP, located in East Merapi District, Lahat Regency, South Sumatra Province. This research was conducted because the mining operational costs did not meet the company’s established cost standards. Therefore, evaluating and controlling mining costs is necessary to meet these standards. The research used a comparative method by comparing planned data with actual data from the field. Both primary and secondary data were collected. Then, data processing and analysis were carried out to determine whether the operational costs aligned with the set standards. The results showed that in May, the planned production target of 275,000.00 BCM did not match the actual production of 217,134.00 BCM, resulting in a shortfall of 50,243.00 BCM. The planned mining operational cost was IDR 7,876,914,668.00, while the actual cost was IDR 7,387,765,786.00. The projected profit was IDR 2,629,071,161.78, but the actual profit was IDR 885,319,814.00, a difference of IDR 1,743,751,347.78. After implementing improvements, the production target increased to 284,408.43 BCM, operational costs were IDR 8,026,378,386.18, and profits reached IDR 2,809,582,719.03. Abstrak. PT Long Daliq Primacoal merupakan kontraktor tambang batubara di IUP PT Banjarsari Pribumi yang berada di Kecamatan Merapi Timur, Kabupaten Lahat, Provinsi Sumatera Selatan. Penelitian ini dilakukan karena tidak tercapainya biaya operasional penambangan dengan standar biaya yang telah ditetapkan perusahaan.  Maka dari itu dibutuhkan evaluasi serta control cost pada kegiatan penambangan untuk mencapai standar biaya yang telah ditetapkan perusahaan. Penelitian yang dilakukan ini menggunakan metode komparatif berdasarkan perbandingan data yang telah direncanakan sebelumnya dengan data aktual yang terjadi di lapangan. Data yang diambil yaitu data primer dan data sekunder. Lalu, dilakukan pengolahan data dan analisis berdasarkan rencana-aktual di lapangan, dan diketahui tercapai atau tidak biaya operasional penambangan dengan standar biaya yang ditetapkan perusahaan. Hasil dari penelitian yang telah dilakukan yaitu pada bulan Mei didapatkan target produksi yang telah direncanakan tidak sesuai dengan aktual lapangan, yaitu target produksi rencana sebesar 275.000,00 BCM dan aktual sebesar 217.134,00 BCM, dengan selisih 50.243,00 BCM. Dan juga, biaya operasional penambangan rencana sebesar Rp 7.876.914,668,00 dan aktual sebesar Rp 7.387.765.786,00. Total profit rencana sebesar Rp 2.629.071.161,78 dan aktual sebesar Rp 885.319.814,00 dengan selisih Rp 1.743.751.347,78. Setelah dilakukan perbaikan, didapatkan target produksi sebesar 284.408,43 BCM, biaya operasional penambangan sebesar Rp 8.026.378.386,18 dan profit sebesar Rp 2.809.582.719,03.
Estimation of Non-Metallic Mineral Resources of Zeolite Commodities Using Aerial Photogrammetry, Vertical Electrical Sounding (VES), and Geological Mapping Guntoro, Dono; Isniarno, Noor Fauzi; Mulyadi, Tommy; Alfarel, Muhammad Reyhand
ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat Vol. 13 No. 2 (2025): (Juni, 2025) Ethos: Jurnal Penelitian Dan Pengabdian Kepada Masyarakat (Sains
Publisher : UPT Publikasi Ilmiah UNISBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v13i2.4520

Abstract

Geoelectricity is a method in geophysics that studies the nature of electric currents in the earth and how to detect them on the earth's surface. This detection includes measuring potential, current and electromagnetic differences that occur naturally or as a result of injecting current into the earth (Kanata, and Zubaidah., 2008). Azhar and Handayani (2004) have carried out laboratory scale modeling to measure the resistivity of several coal samples from the Air Laya Mine using the Wenner-Schlumberger configuration, with the rationale that the resistivity method has been widely used for various shallow seam exploration purposes. The resistivity method is a geophysical method used to measure the apparent resistivity of a medium. Measurements with the Schlumberger configuration use 4 electrodes, 2 current electrodes and 2 potential electrodes each. From the results of measuring the current and potential difference for each particular electrode distance, variations in the resistance value of each layer below the measuring point (sounding point) can be determined. Based on 1D Geoelectric activities in the investigation area, several conclusions were obtained, as follows. Based on the results of geological mapping in the investigation area, it was found that the rocks scattered in the investigation area were in the form of Volcanic Breccia and Tufa Breccia. Based on the results of field observations, it was found that the physical properties of hot water in the investigation area had a TDS value of 250 ppm, then had a temperature of 54° Celsius and an electrical conductivity of 983 μS/m. Based on the results of the 1D Geoelectric investigation, it was found that there are several interpreted lithologies, namely Top Soil which is at an average depth ranging from 0 meters to 6,598 meters with an average resistivity value of 27.18 ohms, then next is the Volcanic Breccia lithology which is at The average depth ranges from 6,598 meters to 11,461 meters with an average resistivity value of 4.28 ohms, then next is the lithological indication of Tufa Breccia which is at an average depth ranging from 11,561 meters to 18,683 meters with an average resistivity value of 9 .44 ohm and then the lithological indication in the form of sandstone which is at an average depth ranging from 18.683 meters to 27.566 meters with an average resistivity value of 15.83 ohm and an indication of marl lithology at a depth of 27.566 meters to 39.55 meters with a resistance value type of 21.08.
Co-Authors A. Sulhan Dwi Wahyullah Ahmad Heriansyah Alfarel, Muhammad Reyhand Alifia Atsiila Fitri Anggi Maulana Arif Mangkusagara Ashari Aries Ayu Ramadhina Bagea Bagja Gumelar Deden Manzil Franandy Dono Guntoro Dono Guntoro Dudi Nasrudi Usman Dudi Nasrudin Usman Dwi Yuda Meliady Kusuma Elfida Moralista Fadlan Al Anshar Fauzan Akbar Ramadhan Ilham Adi Prassetia Ilham Rifki Nurfajar Iswandaru Jivan Akbar La Ode Arlin Linda Pulungan Maulana Okta Saputra Mohammad Rizkie Syahreza Muhamad Awaludin Muhamad Kaisya Hidayat Muhamad Rizaldi Fadlilah Muhammad Afif Zahrandika Muhammad Faiq Syahdan Banama Muhammad Fawwaz Mursyid Muhammad Fedryana Muhammad Fu'ad Muhammad Ikbal Muhammad Ikmal Hikmatullah Muhammad Ilham Naufal Muhammad Mulya Prasetya Muhammad Reyhand Alfarrel Muhammad Rizky Amendra Muhammad Yusup Mulyadi, Tommy Rahma Azizah Kotta Rama Aditya Rijal Aditya Prasetya Rismul Rasyad Rasyad Rizki Purnama Sandy Renaldi Solihin Taufiq Maulana Akbar Tifana Amalya Vaisal Gilang Adrian Vicky Kurnia Nugraha Viona Nathasya Gunawan Wahyu Budi Khorniawan Wahyu Budi khorniawan Widya Mastari Yuliadi Yuliadi Yunus Ashari Yunus Ashari Zaenal Zaenal Zaenal Zaenal Zaenal Zaenal Zaenal Zharfan Ghana