Coal recovery from a coal waste dump Zenon Rozanski, Tomasz Suponik, Piotr Matusiak, Daniel Kowol, Jan Szpyrka, Michal Mazurek and Pawel Wrona E3S Web Conf., 8 (2016) 01052 Published online: 16 September 2016 DOI: 10.1051/e3sconf/20160801052