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Firman .
Jurusan Teknik Pertambangan, Politeknik Negeri Ketapang
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Journal : Politeknosain

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Analisis Kestabilan Lereng Timbunan Tailing Bauksit: Studi Kasus PT. Laman Mining Kecamatan Hilir Utara Herman; Firman
Politeknosains Vol 19 No 2 (2020): Jurnal Politeknosains Volume 19 Nomor 2 - September 2020
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Bauxite mineral commodities in Indonesia are very abundant, based on Pusdatin data, 2016. Bauxite mineral mining is carried out by the method of selective open mining (surface mining), where in its application this method tends to change the morphology in a fairly large area. PT. Laman Mining is one of the mining companies currently operating in Ketapang Regency, and produces residual deposits. From the research conducted it was found that the tailling disposal angle can be made up to 80 degrees and in model two the level should not exceed 45 degrees with factor of safety 1.398. and tailing residues are also utilized, through compressive strength testing, it is found that sample 1:1 have medium quality and sample 1:2 low quality based on SNI.
Penentuan Struktur Urat Kuarsa (Vein) Berdasarkan Respon Geolistrik Resistivity pada Lokasi X Kabupaten Ketapang Kalimantan Barat Firman
Politeknosains Vol 17 No 1 (2018): Jurnal Politeknosains Volume 17 Nomor 1 - Maret 2018
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Geoelectric resistivity method is a geophysical method commonly used in the interpretation of the subsurface by injecting an electric current down the surface to obtain information about the distribution of the value of resistivity of the rock. This study aims to identify the structure of a quartz vein (vein) which is thought to contain gold mineral at the location x. Measurements carried out as many as three tracks with electrodes spaced 5 meters, each 75 meters long, and the penetration depth of 15 meters from surface. Results obtained from the data processing is done with a software tool Res2dinv the form of a cross section 2D resistivity. From the data processing is seen that possible zonasilification as quartz vein (vein) and is thought to contain gold mineral found at an elevation of 602-610 meters . While the 3D model of the interpolated trajectory I and II shown that uric guess shaped Massive Vein.
Co-Authors Herman Herman Sartika . Syarifah Aqla