A study of physico-chemical and mineralogical properties of Talcher coal fly ash for stowing in underground coal mines

►Talcher coal fly ash (Class F) enriched predominantly in SiO2, Al2O3 and Fe2O3. ►Mineral phases present in the ash are quartz, mullite, magnetite and hematite. ►Fly ash and pond ash particles are almost spherical in shape. ►Pond ash is more suitable for stowing due to coarser size and greater permeability