BLASTHOLE SEALING DEVICE Russian patent published in 2001 - IPC

FIELD: mining industry, particularly, sealing devices of blastholes for supply of cementing composition for cementing of fissured rocks. SUBSTANCE: sealing device has tube with inlet and outlet ends; hose-like elastic sealing member fitted on tube; side and end check valves; blowout diaphragm and means for its fixing. End check valve is located on tube inlet end. Diaphragm fixing means is made in form of rolled-in tube edge. End check valve may be located in bushing secured to tube inlet end. Bushing has partition with periphery holes. Shutoff member of valve is made in form of flexible disk with central hole. Said disk covers periphery holes of partition from internal side. End check valve may be made in form of valve with spherical shutoff member. EFFECT: improved sanitary conditions of personnel labor and higher reliability of blasthole sealing. 3 cl, 1 dwg