Characterization of black claystone, coal, and coal rank using deep learning in the sinje block, Murung Raya Village, Central Kalimantan Province, IndonesiaObrin Trianda, Bagus Gilang Pratama, Rizqi Prastowo and YongkiE3S Web Conf., 688 (2026) 01001DOI: https://doi.org/10.1051/e3sconf/202668801001