Determination of composite fuel parameters in the operation of technogenic deposits of coal mining enterprisesOleksandr Haidai, Vladyslav Ruskykh, Andrii Koveria, Valeriia Firsova and Dariusz SalaE3S Web Conf., 526 (2024) 01021DOI: https://doi.org/10.1051/e3sconf/202452601021