TY JOUR TI Material composition of coal mining waste from the Prokopyevskugol Processing Plant and the prospect of using the screw separation method for their enrichment KW Kuznetsk coal basin KW coal sludge KW spiral separation mineralogical KW technological assessment of raw materials KW coal enrichment waste JO Vestnik of geosciences AU Tureckaya, N.Y. AU Chikisheva, T.A. AU Komarova, A.G. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"