WPŁYW RODZAJU POPIOŁU NA WYBRANE WŁAŚCIWOŚCI WYTWORZONYCH NA ICH BAZIE MIESZANIN WODNYCH

The paper presents the possibility of using two types of fly ash from utility power plants burning hard coal in underground mining. Mixtures made from fly ash from a conventional boiler without flue gas desulphurisation products (10 01 02) and a fluidised bed boiler with flue gas desulphurisation products (10 01 82) were tested. The mixtures were prepared using mine water with a density of 1023 g/dm3. The tested mixtures were of liquid consistency with a flowability of 160-280 mm Taking into account the obtained test results and guidelines of the PN-G 11011:1998 standard, it should be stated that, in terms of the discussed parameters, mixtures produced on the basis of ash from the fluidised bed boiler (10 01 82) meet its requirements in the range of flowability of 160-240 mm, only in the case of the backfilling technology. In solidifying backfill technology, none of the mixtures tested comply with the aforementioned standard. In addition, when using fly ash mixtures without flue gas desulphurisation products from a conventional cat (10 01 02) in underground mining, careful consideration must be given to its feasibility, the technology in which it is to be used and, above all, where it is to be applied.