METHOD FOR PREPARATION OF EXPLOSIVE MIXTURE BASED ON AMMONIACAL SALTPETER AND FOAMED POLYMER Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this relates to explosive mixtures with special requirements with respect to disturbance of rock mass being mined. Method implies foaming of polymer in saturated solution of ammoniacal SALTPETER and treatment of foamed granules. Foaming is effected by subjecting primary components to electromagnetic energy of superhigh frequency. Foaming is alternated with forced processing of foamed granules in solution up to moment when they start compressing. Separation of explosive mixture from solution is effected after ammoniacal SALTPETER starts crystallizing. EFFECT: high efficiency. 1 tbl