DEVICE FOR INJECTION AIRING OF BOTTOMHOLES OF BLIND DRIFT Russian patent published in 2011 - IPC E21F1/08 

FIELD: mining.

SUBSTANCE: device comprises confusor, intermediate flange and nozzle, including inner circular chamber and nipple for supply of compressed air into chamber. Screen filter fixed against falling out with a stop ring is installed in nipple for compressed air supply. End part of inner surface of nozzle that adjoins flange has spherical surface. In area of nozzle connection to flange with the help of bolts a circular slot is formed due to gasket. To supply water into inner cavity of device, confusor is equipped with nozzle in outlet part. Device is equipped with handles for transportation.

EFFECT: improved efficiency of airing due to increased distance up to 20 m and more from end of airing pipeline to blind bottomhole of developing entries, dust suppression of high quality and gas dilution directly in focus of their formation.

3 dwg