METHOD OF CREATING ACOUSTIC IMPACT JET IN MINERAL MEDIUM AND DEVICE TO THIS END Russian patent published in 2011 - IPC B03B5/00 

FIELD: mining.

SUBSTANCE: proposed method comprises mixing fuel components, i.e. hydrocarbon fuel and oxidiser, to produce fuel mix, firing it in combustion chamber to create supersonic gas jet and cooling the combustion chamber. Fuel components are mixed in vortex chamber communicated via fuel mix injection branch pipes with combustion chamber. Prior to mixing, each fuel component is heated to hydrocarbon fuel evaporation temperature. Heavy hydrocarbon fuel and compressed air make hydrocarbon fuel and oxidiser, respectively. For kinetic and acoustic effects, pulse efflux of supersonic jet with opening angle exceeding 8° in water-mineral medium is created. Combustion chamber is cooled by said water-mineral medium. Proposed device comprises fuel component preparation assembly, supersonic combustion chamber with Laval nozzle, fuel mix firing assembly and attachment bar. Preparation assembly consists of fuel component unit mounted separately on bar top end and fuel component vertex mixing chamber made up of two symmetric convex lenses jointed together by their straight circular section with fuel feed branch pipe chamber cover. Said branch pipe has its axis aligned with fuel injection branch pipe axis and perpendicular to air feed branch pipe axis. Fuel component heating unit comprises cylindrical casing with flanges tightly closed by covers. Casing top part has air feed branch pipe arranged tangentially therewith. Top cover is furnished with electrical air heater, fuel feed union and temperature regulator pickup socket. Bottom cover has fuel and oxidiser feed outlet branch pipes. Note here that Laval nozzle represents an over-expanded nozzle.

EFFECT: higher process efficiency.

2 cl, 3 dwg