STUDI BENTUK GEOMETRI KEMENERUSAN LAPISAN BATUBARA PADA DAERAH KONSESI PERTAMBANGAN PT BUMI MURAU COAL, KECAMATAN MUARA WAHAU, KABUPATEN KUTAI TIMUR, PROVINSI KALIMANTAN TIMUR

Abstract

The increasing of coal need cause a lot of coal exploration. The aim of the research is identifying cause factor of geometrycal shape and continuously direction of coal layer in the research area. Reseach area belong to the Muara Wahau and Kongbeng district, East Kutai, Province of East Kalimantan. This region separated by 1000’00” – 1015’00”NL and 116040’00” – 116055’00”EL. The research method used corelation and analysis method. This research used data from the result of core drilling, radioactive measuring and stone electricity in the field by using of data from geophysical well logging. The measurement had done ten points. Based on the procesing data, same were known litologies that were claystone, siltstone, coal and sandstone. Eventhough based on field observation, research area can be devided into two morphology, that were hilly and fluvial unit. From the result of the geophysical well logging and the core drilling on the ten locations research area were found three coal layers, with severally thickness : a.) Seam 1 14,10 – 33,55 M, b.) Seam 2 Upper 7,45 – 15.21 M, c.) Seam 2 Lower 8,69 – 13,65 M. It can be concluded that the geometry shaped and continuously coal layers are influenced by sediment area and geology structure, anticline form. Pattern of the spread coal layer are parallel purpose to strike sediment of accumulation, follow the curve pattern from the end of the fold and continuously purpose sloping layer, follow the fold. The Seam continuously 1 on the research area so much thin to north west. The suggestion that can be given is open pit mining system. It should be done from the south to the north in the research area.