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All Journal Jurnal Ners Jurnal Indonesia Sosial Teknologi Blantika : Multidisciplinary Journal
Nursani, Rodiyah
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Computer Science & IT Economics, Econometrics & Finance Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing Public Health Social Sciences

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Analysis of Quicklime and Organic Chemical Coagulant Doses in Acid Mine Water Management at PT Lematang Coal Lestari (LCL), Gunung Raja, Muara Enim, South Sumatra Gumanti, Suhardiman; Nursani, Rodiyah
Jurnal Indonesia Sosial Teknologi Vol. 6 No. 3 (2025): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v6i3.8922

Abstract

Mine acid water (AAT) is one of the liquid wastes produced by coal mining activities. The existence of this liquid waste can hurt the environment, so it needs to be managed. This management aims to minimize the negative impact that will be caused. This study aims to determine the stages of AAT management and analyze the need for lime and chemical organic coagulants for coal mining at PT Lematang Coal Lestari (LCL). The method used in this study is by field observation, interview methods, and documentation as supporting data. The result of this study is that the stages of AAT management carried out by PT LCL are known, starting from AAT pumping, mixing chemical organic coagulant, measuring the pH of the inlet channel, liming the inlet channel, checking the color and pH of the outlet line water, mixing the chemical organic coagulant and liming the outlet channel if necessary, as well as settling. The lime dosage required by PT LCL is 0.32 gr/l, and the chemical organic coagulant requirement is 0.11 ml/l in one AAT water management.
Evaluasi Produktivitas Excavator Komatsu Pc 1250 dan OHT Komatsu 785 pada Pengupasan Overburden Pada Bulan Februari Pt Dizamatra Powerindo Lahat Sumatera Selatan Delti, Delti; Husni, Ahmad; Nursani, Rodiyah
Blantika: Multidisciplinary Journal Vol. 3 No. 9 (2025): Special Issue
Publisher : PT. Publikasiku Academic Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57096/blantika.v3i9.408

Abstract

PT Dizamatra Powerindo merupakan perusahaan independen di bidang pertambangan batubara dengan target produksi 378.000 ton dan target pengupasan overburden sebesar 2.872.800 BCM pada tahun 2025. Penelitian ini bertujuan untuk mengevaluasi produktivitas alat gali muat excavator Komatsu PC 1250 dan alat angkut OHT Komatsu 785 dalam kegiatan pengupasan overburden di Pit Tengah. Metode penelitian menggunakan pengambilan data cycle time sebanyak 30 data pada bulan Februari 2025 dengan pendekatan observasi langsung dan pengolahan data statistik. Hasil penelitian menunjukkan produktivitas alat gali muat sebesar 542,029 BCM/jam dengan cycle time rata-rata 22,29 detik, sedangkan produktivitas alat angkut mencapai 103,617 BCM/jam dengan cycle time rata-rata 17,49 menit. Efisiensi kerja mencapai 83% dengan match factor 0,76, yang menunjukkan adanya waktu tunggu bagi alat gali muat menunggu alat angkut. Untuk mengoptimalkan kinerja unit dan mencapai match factor 0,95, disarankan pengurangan jumlah unit alat angkut menjadi 5 unit untuk mengurangi waktu tunggu alat gali muat. Faktor-faktor yang mempengaruhi produktivitas meliputi kondisi jalan angkut, cuaca, bucket fill factor (0,71), dan swell factor (0,85). Penelitian ini memberikan kontribusi dalam optimasi operasional penambangan batubara khususnya dalam pengupasan overburden menggunakan alat berat.
Penerapan Kesehatan Dan Keselamatan Kerja Pada Pengangkutan Batubara Di PT Lematang Coal Lestari Muara Enim Sumatera Selatan Nursani, Rodiyah; Yovanda, Ridho; Gumanti, Suhardiman
Jurnal Ners Vol. 8 No. 1 (2024): APRIL 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jn.v8i1.22115

Abstract

The occupational safety and health (K3) conditions of companies in Indonesia are estimated to be quite low, this can be seen from the high risk of accidents that can occur in a company. Work accidents occur due to workers, work tools and the work environment, so it is necessary to implement occupational safety and health (K3) in carrying out mining activities. Safety and health factors are very important because they have a big influence on employees, society and also company assets. The aim of this research is to look at the implementation of Occupational Health and Safety in coal transportation at PT Lematang Coal Lestari. The method used in this research was field observation in the form of visits and direct field observations as well as data collection in the form of interviews or surveys. The research results showed that from the 8 questionnaire questions given to 5 respondents, PT Lematang Coal Lestari (LCL) employees received very good responses. Keywords: Occupational Health and Safety, Transportation, Coal.
Co-Authors Delti, Delti Husni, Ahmad Suhardiman Gumanti, Suhardiman Yovanda, Ridho