Substantiation of rational parameters of open-pit development of a two-layer depositUmidjon Yermekbayev, Shadiboy Khakimov, Zoir Nazarov, Otabek Giyazov and Azizjon NematovE3S Web Conf., 417 (2023) 01005DOI: https://doi.org/10.1051/e3sconf/202341701005