Improvement of the transitional technology from open pit to underground mining of magnetite quartziteMykola Stupnik, Vsevolod Kalinichenkо, Olena Kalinichenko, Oleksandr Shepel and Alexey PochtarevE3S Web Conf., 526 (2024) 01026DOI: https://doi.org/10.1051/e3sconf/202452601026