GEOLOGY AND ESTIMATION OF COAL RESOURCES IN THE NORTH BLOCK, EVALUATION OF COAL RESOURCES IN THE CENTRAL AND EAST BLOCK OF PT PADA IDI, NORTH BARITO DISTRICT, CENTRAL KALIMANTAN

• Main Author: Tirta Kusuma, Aditya
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71677
• Institution: Institut Teknologi Bandung

The human need for coal energy resources is currently getting higher. This increase needs to be balanced with the discovery of new resources and reserves. PT Pada Idi participates in realizing the fulfillment of coal energy through coal exploration and production activities. Based on PT Pada Idi's mine feasibility study in 2020, the maximum amount of PT Pada Idi's coal production recorded by the government is 1.5 million tons/year. In order to increase PT Pada Idi's coal production to 2 - 2.5 million tons/year, changes to the feasibility study and mine scheduling must be made. Therefore, it is necessary to carry out exploration in potential areas to update resource calculations. This study aims to estimate the resources of the north block, as well as evaluate the resources of the central and east blocks of PT Pada Idi. In addition, this study also aims to determine the geomorphology and geology of the study area in general, as well as determine the characteristics, quality, and rank of coal. Based on field mapping results of 34.1 km2, the study area consists of four rock units, namely Claystone Unit 1 including eight coal seams, Sandstone Unit including one coal seam, Claystone Unit 2 including twelve coal seams, and Alluvial Unit. The study area has equivalence with the Upper Warukin Formation which was deposited in the upper delta plain and is a coal-bearing formation in the study area. Based on 62 coal outcrop data, 169 drills well data, and 337 coal quality data, modeling of coal distribution was carried out for resource calculation. Total coal resources in the north block amounted to 1,018,676 tons, the central block amounted to 4,415,600 tons, and the east block amounted to 15,245,061 tons, with a rank of sub-bituminous A coal – high volatile B bituminous coal. The total resources for the central and east blocks have increased from the previous resource estimation in 2020.