DEVICE FOR CREATION OF AIR GAPS IN BLAST HOLES (VERSIONS) Russian patent published in 2024 - IPC F42D1/08 F42D3/04 

FIELD: blasting operations.

SUBSTANCE: invention relates to devices for blasting operations and can be used in mining industry, as well as in other industries for blasting operations. Two versions of the device for creating air gaps in blast holes are proposed. First device is made in the form of a well gate fixed on a post in the form of a pipe with a support. Inside the pipe there is a dynamic swirler in the form of a spiral-shaped plate. Well gate is additionally connected to a flexible hanger made with possibility of attachment to the wellhead and installation of the device at the well bottom in the subdrill. Second device is made in the form of a well gate in the form of a bowl fixed on one end of the pipe, inside which there is a dynamic swirler in the form of a spiral-shaped plate. Flexible hanger is attached to the other end of the pipe and can be attached to the wellhead and to adjust the depth of the device installation in the well. On flexible hanger of each device between two limiters of movement from rubber rings there installed is additional dynamic swirler in the form of a spiral-shaped plate made with possibility of its movement along flexible hanger and fixation at specified place.

EFFECT: increased efficiency of borehole charge detonation due to provision of higher completeness of detonation of explosive charges separated by air, water-air and water gap of borehole explosive charge.

2 cl, 4 dwg