Creating Citra maps, rainwater catchment maps, local and regional geology maps, geomorphology maps, IUP OP maps, mine progress maps and mine reclamation maps for years 1 to 5, track maps, mine drainage maps, resource and reserve distribution maps, end-of-mine hue maps, site plan maps, and topographic maps and determining mine facilities and mine roads using ArcGIS software. Map-making is accomplished with photogrammetric techniques from aerial photographs produced by drones. The results of this mapping are Digital Surface Model (DSM), Digital Terrain Model (DTM), and high-resolution contours. This mapping was carried out at a scale of 1:4000 with a mapped area of approximately 13.52 ha.

3D modeling of the 13.52 ha (a) mine based on the Digital Surface Model (DSM), Digital Terrain Model (DTM), and high-resolution contours. The 3D mine design was done using Global Mapper software. Determination of the width of the mine level and the height of the mine was determined based on slope stability analysis using Rockscience Slide software. The calculation of resources and reserves and 3D modeling of the mine from year 1 (b) to year 5 (f) were carried out. Determination of the 3D mine area is carried out by calculating the volume of estimated, inferred, indicated, measured, and proven resources by considering aspects of mine life and mine production capacity.

This research is entitled "The Effect of Organic Petrological Characteristics on the Solvent Extraction Method of Low-Rank Coal Liquefaction Process, Tanjung Agung Area, Muara Enim Formation, South Sumatra Basin". this research was conducted with the aim of studying the influence of coal characteristics on the liquefaction process using the solvent extraction method. The coal sample used is low-rank coal from the Tanjung Agung area, Muara Enim Formation, South Sumatra Basin. The coal liquefaction process was carried out with N-Methyl-Pyrrolidone and Carbon Disulfide solvents in a ratio of 1:1. The temperature used in the coal liquefaction process is 55℃. Organic petrological characteristics were obtained from coal samples before coal liquefaction (original) and coal residue after coal liquefaction. The results obtained show that the abundance of huminite and liptinite maserals has an influence on the conversion results of coal liquefaction due to the composition of materials containing cellulose and lignin in the huminite maserals group as well as algae, waxy substances, lipids, and polysaccharides in the liptinite maserals group which have high H/C ratios and aliphatic structures, while the abundance of inertinite maserals has no influence due to the presence of materials containing wood tissue that has undergone strong aromatization in the petrification process.

This research is entitled "Characteristics and Coal Liquefaction Using Solvent Extraction Method on Low-Rank Coal of Muara Enim Formation, from Tanjung Agung Area, South Sumatra Basin". This research was conducted on seam B coal of Muara Enim Formation located in Tanjung Agung District, South Sumatra Province. Coal analysis was carried out on 10 samples based on the type of lithotype of each seam. The analytical methods used were proximate analysis, ultimate analysis, vitrinite reflectance (VR) analysis, X-Ray Diffraction (XRD) analysis, organic petrographic analysis on coal polishing incision, and coal liquefaction analysis using solvent extraction method. The results of this study show that coal characteristics based on ash content, mineral content, moisture, hydrogen, carbon, and H/C ratio generally do not have a significant influence on the conversion value of coal liquefaction due to low pressure and temperature conditions that cause chemical reactions to run slowly so that the coal liquefaction conversion process is not maximized, and is dominated by physical dissolution. Based on the abundance of reactive mineral content, the huminite and liptinite mineral groups generally have an influence on the results of coal liquefaction conversion, while the inertinite mineral group shows no influence on coal liquefaction conversion.