PREPARATION METHOD OF POROUS HARDENING MIXTURE FOR STOWING OF MINED-OUT UNDERGROUND SPACE Russian patent published in 2014 - IPC E21F15/00 C04B38/00 

FIELD: mining.

SUBSTANCE: invention proposes a preparation method of a porous hardening mixture for stowing of the mined-out underground space, which involves joint crushing and grinding of a mineral filler and a binding agent in a cone-type inertia crusher, mechanical activation of the obtained mixture, addition of water to the mixture and its supply to the stowed space. Besides, mechanical activation of the mixture is performed till water is added to it at the value of crushing force of (4÷8)·10⁵ N. And before the mixture is supplied to the stowed space, foam is added to the stowing mixture.

EFFECT: reduction of a binding agent consumption at sufficient strength of a stowing mixture.