Enhancement of the technology of mining steep ore bodies applying the “floating” crownSerhii Pysmennyi, Serhii Chukharev, Kyelgyenbai Khavalbolot, Iryna Bondar and Jambaa IjilmaaE3S Web Conf., 280 (2021) 08013DOI: https://doi.org/10.1051/e3sconf/202128008013