BACKFILL MIXTURE WITH NANO-MODIFIED ADDITIVE Russian patent published in 2021 - IPC E21F15/00 

FIELD: mining industry.

SUBSTANCE: invention relates to the mining industry, namely to backfill mixtures, and can be used to backfill a goaf in the development of mineral deposits. The filling mixture contains a saturated solution of halite waste salts and a solid mixture consisting of: halite waste from potash ore processing, a binder - magnesia cement, an additive, and the filling mixture contains a nanomodified additive - astralen as an additive. The filling mixture contains, wt.%: 11.11 - a saturated solution of salts of halite waste and 88.89 - a solid mixture, which contains, wt.%: halite waste from potash ore processing - 98.99–99.49; nanomodified additive - astralen - 0.01; magnesia cement - the rest.

EFFECT: increasing strength of the filling mixture, reducing the consumption of the binder in the filling mixture, increasing completeness of utilization of potash ore processing waste.

1 cl, 1 tbl