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All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Jurnal Teknologi Mineral dan Batubara
Septami Setiawati
Universitas Tanjungpura Pontianak
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Energy Environmental Science Materials Science & Nanotechnology

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RANCANGAN GEOMETRI PELEDAKAN YANG EFISIEN UNTUK MENDAPATKAN DISTRIBUSI UKURAN FRAGMENTASI BATU GAMPING Murad; Septami Setiawati; Wahdaniah Mukhtar
Jurnal Teknologi Mineral dan Batubara Vol 19 No 2 (2023): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No2.2023.1386

Abstract

The rock fragmentation distribution resulting from blasting is one of the important factors of the blasting method design model for dismantling excavated materials. Calculation of rock fragmentation resulting from blasting using the RL theory. Ash, CJ. Konya, and ICI-Explosive. The method for determining the size of rock fragmentation resulting from blasting and analysis of the fragmentation size distribution in blasting activities uses the Kuz-Ram method and Split Desktop 4.0 software. A good blasting geometry design from a technical and economical point of view enables achieving target production according to the design made by the company in producing an average fragmentation size of limestone <50 cm. Blasting geometry applied by PT. Semen Padang produces a hole volume of 275 m3 with a fragmentation of 53.46 cm. The results of the fragmentation design are based on the RL Ash theory and the Kuz-Ram method with a volume of300.67 m3each hole anda fragmentation size of 50.07 cm, CJ. Konya analysis resulted in a hole volume of 422.4 m3 with an average fragmentation of 44.17 cm, and ICI-Explosive method resulted in a hole volume of 285 m3 with an average fragmentation of 47.86 cm. Based on blasting geometry calculation, fragmentation analysis and economic calculations, it is shown that the blasting geometry suggestion using CJ Konya theory is more optimal and feasible to apply because it results in a larger hole blasting volume, higher percentage of fragmentation of <50 cm which is compatible with the bucket capacity, as well as higher revenue and profit compared to the other two methods.
ANALISIS POTENSI BAHAYA DAN RISIKO MENGGUNAKAN METODE JOB SAFETY ANALYSIS PADA AKTIVITAS PENCUCIAN DI PT. ANUGRAH BORNEO MARUYA PERSADA KABUPATEN KETAPANG KALIMANTAN BARAT Oktavianus Oktavianus; Murad Murad; Septami Setiawati
JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Vol 11, No 1 (2024): JeLAST Edisi Februari 2024
Publisher : JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v11i1.77471

Abstract

PT. Anugerah Borneo Maruya Persada carries out mining through excavation, transportation and washing, during the washing process in the Washing Plant area there are still conditions work that can be categorized as unsafe. Therefore, it is necessary to identify risks, risknassessmentcand risknrecommendations using the Job Safety Analysis method for Prevent work accidents among workers who are active in the Washing Plant 1 location and Washing Plant 2 at PT. Borneo Maruya Persada Award. Results obtained from research namely, there is a risk assessment before and after control recommendations are carried out decrease. On equipment activities at Washing Plant 1 before recommendations are made controlnhas 8% HighnRisk, 44% Moderate Risknand 48% Low Risk. Once done controlnrecommendations are 0% High Risk, 7% Moderate Risk and 93% Low Risk.Meanwhile, equipment operating activities at Washing Plant 2 are before the recommendation control of 10% High Risk, 50% Moderate Risk and 40% Low Risk. Once done Control recommendations are 0% High Risk, 10% Moderate Risk and 90% Low Risk.Keywords: HIRARC, JSA, Risk Management
Co-Authors Murad Murad Murad Oktavianus Oktavianus Wahdaniah Mukhtar