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All Journal MINERAL Jurnal Riset Rumpun Ilmu Teknik (JURRITEK)
Permadi, Dimas Agung
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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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
JURAL 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 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.
Co-Authors Andy Yanottama Diah Wully Agustine Hisni Rahmi Muhammad Faisal Seprizal Yanottama, Andy Zella Navtalia