PROCESS OF CHARGING OF HOLES GOING DOWN FOR SPARING EXPLOSION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 1999 - IPC

FIELD: mining and construction industry, sparing blasting while excavating valuable crystal starting material, working of benches of quarries. SUBSTANCE: characteristic feature of process consists in anchoring of water-tight end of polyethylene hose placed into flooded or dry holes near bottom by means of parachute-catch, in feed of emulsion explosive with gas- generating additive in amount enabling density of explosive in hose to be diminished to (0,4÷0,8)•10³ kg/m³. EFFECT: increased efficiency of blasting operations while excavating valuable crystal starting material. 11 cl, 3 dwg