COMPOSITION OF FILL MACHINE Russian patent published in 2002 - IPC

FIELD: mining industry; applicable in underground mining of mineral deposits with filling of worked-out space. SUBSTANCE: composition of fill machine containing cement, surfactant, filler and water is distinguished by the fact that it additionally contains amorphous sediments of industrial sewage waters based on calcium surface, and surfactant is used in the form of bacterial addition containing oxidation products of aqueous solutions of ferrous sulfate or pulp of compounds containing iron and sulfur in presence of Tiobacillus ferrooxidants microorganisms. Composition has the following ratio of components, wt. %: cement, 4-10.5; bacterial addition, 0.55-10.2; amorphous sediments of treatment of industrial sewage waters based on calcium sulfate, 10.0-60.0; filler, 12.5-72.0; water, the balance. Amount of bacterial addition is determined by relationship y=0.63/X, where y is ratio of bacterial addition to amorphous sediments of industrial sewage water treatment; X is amount of cement within 4 to 10.5 wt.%. EFFECT: higher strength of fill mixture due to stimulation of concrete mix hardening with preserved spreadability of fill mixture and extended utilization of production wastes. 1 tbl, 2 ex