Estimation of Overburden and Estimation of Mineable of Coal Reserved on Pit at Area B III Warute South at Coal Contract of Work (CCOW) Pt. Antang Gunung Meratus Sungai Raya Sub-District, Hulu Sungai Selatan District East Kalimantan

Abstract

In accordance with technological advances in the field of mining, nowadays more and more computerized -based programs that can facilitate the work of modeling and calculation of reserves and mining of various kinds of designs. These programs were created to support the work on the basis of the work that does not change the basic concept and philosophy of the calculation. Detail research was performed on pit at area B III warute south At Coal Contract Of Work (CCoW) PT. Antang Gunung Meratus Sungai Raya Sub-District, Hulu Sungai Selatan District East Kalimantan Province. Estimation of overburden and mineable coal reserves through of  redesign of mining pit was conducted using the cross section method with computerized software system autocad 2007 and minescape 4.1.1.9Estimation of overburden and Mineable coal reserved calculation performed on the main seam M4. The M4 seam shows varying thickness of coal, with a wavy layer structure and split. The slope of coal in the study area is generally relatively steep, which is in the range 38° - 42° with the strike direction of the N200°E - N210°E.Estimation of overburden and mineable coal reserves using the cross section method are: overburden volume is 1339886,283 BCM and mineable coal reserves is 459678, 6117 MT so that the value of Stripping Ratio obtained was  2.97