DEVICE FOR BREAKAGE OF ROCK OVERSIZES Russian patent published in 2002 - IPC

FIELD: mining; drilling and blasting operations. SUBSTANCE: device includes working member, boom with three suspended bodies with jet nozzles, booster jacks, hydraulic cylinder pipelines with control valves, self-propelled car with turning frame and boom, suspended from which is case with rigidly secured bodies, pumps, synchronizing system, dosing magnetoelectric valves and convergent tube with changeable head made with air pocket and spherical internal surface. Jet nozzles of combustible explosive and oxidizer are combined in mixing nozzle installed in upper part of convergent tube with jet nozzle of combustible explosive located inside oxidizer nozzle. Axes of jet nozzles of initiating explosives and mixing nozzle form angle to each other of 45-60 dwg. Due to that, effect of reduction of expenditures for drilling of boreholes and amount of explosives for breakage of oversizes is achieved and operating conditions are improved in conduction of blasting operations and also in automatic cycling of breakage process. EFFECT: higher efficiency. 1 dwg