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All Journal JOURNAL ONLINE OF PHYSICS Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri MINERAL Jurnal Riset Rumpun Ilmu Teknik (JURRITEK)
Muhammad Faisal Seprizal
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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ANALISIS EKONOMI PERBANDINGAN PENGGUNAAN ALAT COAL CRUSHER DAN FIXED SCREEN DALAM KEGIATAN COAL GETTING Muhammad Faisal Seprizal; Machmud Hasjim; Restu Juniah
Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Vol 22, No 2 (2022): JURNAL SAINS DAN TEKNOLOGI
Publisher : Sekolah Tinggi Teknologi Industri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36275/stsp.v22i2.524

Abstract

Coal getting is one of the activities involved in mining operations. PT. Manggala Alam Lestari, Indonesia carrying out coal getting activities by including in pit coal processing, namely selecting the size or sizing of coal using a fixed screen or grizzly screen. However, the use of fixed screen needs to be analyzed from an economic point of view by comparing with other coal processing processes. This study aims to conduct an economic analysis by comparing investment in coal crusher with fixed screen in coal getting activities. The results showed that coal crusher investment has a Net Present Value (NPV) value of Rp. 751,513,587,600, Internal Rate of Return (IRR) of 10.0279%, Profitability Index of 55.4 and Payback Period of around 0.36 years (4.3 months). Then, fixed screen investment has a Net Present Value (NPV) value of Rp. 709,285,734,051.00, Internal Rate of Return (IRR) of 10.0273%, Profitability Index of 528.1 and Payback Period of around 0.27 years (3.29 months. Fixed screen can still be the main choice because it has a lower investment value than coal crusher so that the resulting profit is also greater.
Kajian Teknis Daya Dukung Tanah untuk Menentukan Kapasitas Optimum Stockpile Utama PT Putra Muba Coal Zella Navtalia; Hisni Rahmi; Muhammad Faisal Seprizal; Diah Wully Agustine; Dimas Agung Permadi; Andy Yanottama
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i1.4777

Abstract

Settlement of the ground floor of stockpile is caused by ground pressure of coal pile which is bigger than stockpile floor bearing capacity leads to bury under of some coal. So it is needed to do a study of optimum capacity by stockpile floor bearing capacity. Study of stockpile optimum capacity is started by calculating Californian Bearing Ratio (CBR) of stockpile subgrade using dynamic cone penetrometer in some location on each of the stockpile compartment. CBR value of stockpile subgrade converted into bearing ratio, so the maximum tonage of stockpile can be known. By considerating of pile height, angle of repose of low grade coal, monthly production target, and the road geometry for mechanical equipment access purpose, the optimum capacity of PT Putra Muba Coal stockpile is 198.549,95 ton, which divided into seven coal piles.
Analisis Balik Kestabilan Lereng Highwall di Pit Pandu PT. Putra Muba Coal Kabupaten Musi Banyuasin Provinsi Sumatera Selatan Andy Yanottama; Muhammad Faisal Seprizal; Jarot Wiratama; Zella Navtalia; Leta Lestari
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 2 (2025): Agustus : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i2.5849

Abstract

Putra Muba Coal is one of the subsidiaries under the MNC Group, operating in the coal mining sector with an IUP (Mining Business Permit) area covering 2,947 hectares. During its mining operations at the Pandu Pit, PT. Putra Muba Coal experienced a landslide incident on the highwall side. Therefore, a back-analysis using the deterministic method was conducted to determine the material property values that led to the slope failure in the mining area. The slope material consists of claystone and siltstone layers, each with a cohesion value of 192.3 kN/m² and 157.0 kN/m², and internal friction angles of 25.3° and 24.4°, respectively. Based on the back-analysis results, it was found that there was a decrease in material property values, with cohesion reduced by 91% and the internal friction angle reduced by 29%. This reduction in material properties suggests that the decrease in cohesion was the primary factor causing the highwall slope failure, as indicated by the back-analysis of slope stability which resulted in a safety factor of (SF = 1.008).
Analisis Kebutuhan Alat Muat dan Alat Angkut untuk Perubahan Shift Kerja pada Quarry Batugamping PT X, Jawa Barat: Analysis of Loading and Hauling Equipment Requirements for a Shift Work Change at a Limestone Quarry PT X, West Java Seprizal, Muhammad Faisal; Yanottama, Andy; Permadi, Dimas Agung; Navtalia, Zella; Agustine, Diah Wully
MINERAL Vol 10 No 2 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/h0ejr004

Abstract

PT X is a company engaged in the limestone mining sector and simultaneously serves as a cement supplier. The company plans to transition from a three-shift work schedule to a two-shift system. This decision is driven by the increasing costs associated with mining, safety concerns, and time losses due to equipment maintenance, following various evaluations conducted by the company's management. This research aims to analyze the requirements for loading and transportation equipment necessary to achieve an annual production target of 4,500,000 tons after the implementation of the two-shift work schedule. The research methodology employed is quantitative, encompassing the collection of both primary and secondary data, as well as an analysis of equipment productivity. The findings indicate that to maintain the production target, it is essential to replace the current loading equipment from the CAT 988B wheel loader to the CAT 990H wheel loader. Additionally, adjustments to the number of equipment are required, including two units of the CAT 990H wheel loader and seven units of the CAT 773 dump truck for Crusher 1, as well as two units of the CAT 992K wheel loader and eight units of the CAT 777D dump truck for Crusher 2. The production capacity of this equipment configuration reaches 4,575,457 tons per year, demonstrating that the production target can be optimally met despite the reduction in the number of work shifts.
REDESIGN ANALISIS STABILITAS LERENG OUT PIT DUMP (OPD) S2 PADA PIT “ATHRAN”, LAPANGAN CAS, KALIMANTAN TIMUR Agustine, Diah Wully; Navtalia, Zella Navtalia; Rahmi, Hisni; Seprizal, Muhammad Faisal S; Tadersi, Risnaliyah Nuriil
JOURNAL ONLINE OF PHYSICS Vol. 11 No. 1 (2025): JOP (Journal Online of Physics) Vol 11 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v11i1.50012

Abstract

Kegiatan penambangan terbuka di Pit “Athran”, Kalimantan Timur, menghasilkan material buangan dalam jumlah besar sehingga memerlukan desain out pit dump (OPD) yang stabil dan aman. Variasi litologi Formasi Warukin dan Formasi Dahor yang terdiri dari batupasir, batulempung, batubara, serta material lepas memengaruhi perilaku geoteknik dan potensi ketidakstabilan lereng. Penelitian ini menganalisis kestabilan lereng OPD S2 menggunakan metode Janbu sebagai pendekatan utama karena sesuai untuk material non-kohesif dan heterogen. Beberapa skenario desain diuji melalui pemodelan numerik dengan mempertimbangkan kondisi air tanah, beban lalu lintas alat berat, serta variasi elevasi dan jenis material timbunan. Hasil analisis menunjukkan variasi nilai faktor keamanan (FK), mulai dari kondisi kritis (FK 1,161), nearly stable (FK 1,220), hingga sangat stabil (FK 1,48). Desain paling aman dicapai pada konfigurasi 3 bench dengan ketinggian maksimal 30 m, penggunaan material lebih kompak pada toe, serta penghindaran water ponding. Rekomendasi ini menjadi acuan teknis untuk meningkatkan keselamatan dan efisiensi operasi penimbunan di OPD S2 Pit “Athran”.
Co-Authors Andy Yanottama Diah Wully Agustine Dimas Agung Permadi Hisni Rahmi Leta Lestari Machmud Hasjim Nuriil Tadersi, Risnaliyah Permadi, Dimas Agung Restu Juniah Wiratama, Jarot Yanottama, Andy Zella Navtalia