WATER BLOCKING ADDITIVE AND THE EXPLOSIVE SUBSTANCE Russian patent published in 2019 - IPC C06B31/28 C06B45/04 

FIELD: blasting operations.

SUBSTANCE: invention relates to the water blocking additive for the explosive substance. Said additive is made in the form of a mixture comprising the stearic acid salt based at least one surfactant, at least one substance when interacting with water forming a jelly or gel selected from gum, as well as at least one combustible substance in the form of the polydisperse composition powder, selected from the stalks flour, wood flour, leaf flour, the plants seeds flour, the cereals flour, in the following ratio of components, wt.%: surfactant 3–25, substance when interacting with water forming a jelly or gel, 25–70, combustible substance in the form of the polydisperse composition combustible powder 25–70, sodium tetraborate up to 2. Additive can be used in explosives substance for blasting works in rocks. Said explosive substance is a mixture of components, wt.%: granulated ammonium nitrate or granular porous ammonium nitrate 85–91 with the liquid petroleum product addition 1–2 and the water-blocking additive 7–9.

EFFECT: introduction of the additive provides the ammonium nitrate based simplest granular explosives with high water resistance, which increases their performance in the watered boreholes and wells.

6 cl, 3 tbl, 4 ex