US12385724 - Method of blasting using jet units charged in a blast-hole

Liners ( 150 ), fittings ( 11 - 22 ), and spacers ( 23 - 25 ) are provided to assemble the jet ( 170 ) units, which work as explosives ( 110 ) and detonators ( 120 ) to form stand-off distance and air-deck ( 140 ) space. The liners ( 150 ) release jets ( 170 ) and the fittings ( 11 - 22 ) and spacers ( 23 - 25 ) are designed to attach the liner ( 150 ) firmly to the explosives ( 110 ), inducing the cavity effect. The objective of the present invention is to provide a blasting method using a jet ( 170 ) unit to overcome the limits of sympathetic detonation, applying a mechanism that is ideal according to the analysis of observations in blast-hole ( 100 ) blasting. The application of jet ( 170 ) units for jet ( 170 ) detonation in blast-hole ( 100 ) blasting overcomes the performance limits of explosives ( 110 ) manufacturing and the conceptual limits of detonators ( 120 ) functionalities and improves the channel effect, dead pressing, loss of power, and stopping of detonation etc. Particularly, the application of controlled blasting and air-decking can be carried out without restriction while maintaining the safety of the slurry or emulsion explosives ( 110 ).

• Inventors: Moon-Jong Kwon
• Filing date: 2023-06-14