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Luthfi Wahyudi
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences

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ANALISIS KESTABILAN LERENG DINDING AKHIR DI PIT BARATLAUT PADA PENAMBANGAN BATUBARA DI PT. PUTERA BARA MITRA , KECAMATAN MENTEWE, KALIMANTAN SELATAN Untung Wahyudi; Excelsior T P; Luthfi Wahyudi
KURVATEK Vol 3 No 1 (2018): April 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v3i1.569

Abstract

PT. Putera Bara Mitra used open mining system for mining operation, Yet the completion of study on the end wall slope stability that  undertaken by geotechnical PT. Putera Bara Mitra in Northwest Pit and the occured a failure in the low wall on the 1st June 2012 led to the need for analysis and design the overall slope at the mine site. To analyze and design the overall slope, used value of the recommended minimum safety. The value was based on company for single slope SF ≥ 1.2 and SF ≥ 1.3 for overall slope. The calculation used Bichop method with the help of software slide v 5.0. Geometry improvements was done at the low slopes that originally single wall with a 30 m bench height and a slope 70° with SF = 0.781, into 4 levels with SF = 1.305. The analysis explained the factors that affect the stability of the low wall included the mining slope geometry, unfavorable drainase system, material stockpiles and seismicity factors. It was necessary to do prevention efforts to maintain the stability of the slope included the redesign to slope geometry, handling surface and subsurface water in a way to control slopes draining groundwater, vegetation stabilization using and monitoring slope using Total Station with Prism and Crackmeter to determine the movement of cracks visible on the surface. 
PENDUGAAN KANDUNGAN BIJIH BESI DENGAN METODE GEOLISTRIK RESISTIVITY 2D, IP, DAN GEOMAGNET DI PT. ARIES IRON MINING DESA TUMBANG TILAP, KALIMANTAN TENGAH Valentinus Singgih Yudanto; Excelsior T P; Luthfi Wahyudi
KURVATEK Vol 3 No 1 (2018): April 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v3i1.570

Abstract

The study was conducted at PT. Aries Iron Mining Tumbang Tilap, District Mentaya Hulu, Kotawaringin Timur, East Kalimantan province.Exploration of the geomagnetic method parameter used to study susceptibility of these methods and geoelectric parameters used to study iron ore with this method is conductive and resistive properties. Geomagnetic data is processed using surfer program, the results of the program are used to determine the retrieval surfer geoelectric. Geoelectric method can provide a snapshot below the soil surface is generally without excavation geophysical methods using methods Geoscan (2D Resistivity and Induced Polarization). IP geoelectric investigation using dipole-dipole configuration, and is limited to the determination of the variation of the subsurface resistivity and chargeability vertically or horizontally
Co-Authors Excelsior T P Untung Wahyudi Valentinus Singgih Yudanto