Management of Excess Mined-Out Space of Quarry Fields of Coal Open Pit Mines Alexei Selyukov, Tatiana Gvozdkova and A.J.S. (Sam) Spearing E3S Web Conf., 278 (2021) 01020 Published online: 29 June 2021 DOI: 10.1051/e3sconf/202127801020