ウンバルート炭鉱の躍進
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概要
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Embalut Coal Mine is located in the north of Samarinda City, East Kalimantan, Indonesia. The mine started coal production in 1983. Coal production consists of U/G and O/P. 5 longwall panels are working in 3 underground pits, and coal is transported to the surface using mine cars by winders, then is carried about 6 km by dump trucks to the washing plant whichi is located at the east riverside of Mahakam River. An adequate quality coal for market is made by mixing the high caloric coal from U/Gwith low caloric coal from O/C at the washing plant. Clean coal is shipped to barges (2, 500〜8, 000) by the loading facility (500 tons/hr), coal for domestic users is derectly carried to destination by barge and coal for export istransshipped to adepot ship on the opensea or Balikpapan Coal Terminal. Mitsui Mining Engineering Co., Ltd., had dispatced 3 engineers as mine managers and 4 engineers as vice mine managers from 1990 to 1997, and after that Indonesian mine manager has been engaged in. The improvements of the mine furing our stay in the mine were made by as follows; (1) introduction of retreat longwall mining system using hydraulic props & link bars, (2) introduction of endlesse wired transportation system at a each level road. At some extraction panels where wood have to be used, room & pillar system shich was using a traditional wooden props was replaced by a longwall system using combination of relatively strong and weak wooden chock at the early stage, but finally all the panels were improved to hydraulic props & link bars system. Furthermore, for the purpose of smooth mine car transpotation, the road maintenance system was improved. The results of those improvements of the mine, mining recovery ratio increased drastically, and the double level of U/G production has been reached compared with the period before under control of Mitui Mining Engineering
- 1999-12-25