From Mining Innovations to Sustainable Development: Keynote Speakers of the First to the Second International Innovative Mining SymposiumMichal Cehlár, Juraj Janočko, Nuray Demirel, Seroni Anyona, Stefan Vöth, Maxim Tyulenev and Sergey ZhironkinE3S Web Conf., 21 (2017) 00002DOI: https://doi.org/10.1051/e3sconf/20172100002