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All Journal Jurnal Indonesia Sosial Teknologi Cerdika: Jurnal Ilmiah Indonesia
Suhardiman Gumanti
Universitas Prabumulih
Humanities Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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Optimalisasi Produktivitas Alat Gali Muat dan Alat Angkut Pada Kegiatan Coal Getting Rahmat Hidayat; Suhardiman Gumanti; Dedi Yansen
Cerdika: Jurnal Ilmiah Indonesia Vol. 4 No. 10 (2024): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v4i10.2048

Abstract

PT Dizamatra Powerindo adalah salah satu perusahaan swasta yang bergerak dibidang usaha pertambangan batubara yang berlokasi tepat di Desa Kebur, Kecamatan Merapi Barat, Kabupaten Lahat, Provinsi Sumatera Selatan. Sistem penambangan yang diterapkan di PT Dizamatra Powerindo adalah surface mining yang saat ini berfokus di pit 4 dengan kondisi lapisan batubara (seam) dengan kemiringan (dip) sekitar 22^0. Pada penelitian ini penulis melakukan penelitian pada pit 4 sidewall timur yang aktivitas penambangan di lakukan oleh perusahaan kontraktor PT Cipta Kridatama, pada sidewall timur terdapat 1 unit Excavator Caterpillar 330 GC dan 4 unit Dump Truck Merc-Benz Axor. Dari hasil penelitian yang dilakukan didapatkan produktivitas dari alat gali muat sebesar 430.09 ton/jam kemudian untuk produktivitas alat angkut yaitu sebesar 81.64 ton/jam, dan match factor yang di dapat yaitu 0,758, yang berarti MF < 1dan menyebabkan waktu tunggu bagi alat gali muat karena menunggu alat angkut datang. Dalam  hal ini perlu dilakukan penambahan satu unit untuk alat angkut sehingga bisa mencapai MF 1.
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 Suhardiman Gumanti; Rodiyah Nursani
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.
Co-Authors DEDI YANSEN Rahmat Hidayat Rodiyah Nursani