The evaluation of a possibility of utilising the mixture of flotation tailings and fly ash for the formation of a suitable roof for the mining of the lower bench of a thick seam

Autor Hudeček, Vlastimil
Zdroj: 1. New trends in mineral processing IV, part II 1. Ostrava : Vysoká škola báňská - Technická univerzita, 2001 1. 80-7078-886-0 1. S. 357-362