Patent ID: 8136449
Filing Date: 2012-03-20
Classification: F42D

Abstract:
1. A method of using dry blasting powder in a blasting hole having water in the bottom thereof comprising the following steps: drilling said blasting hole, said water accumulating in said bottom of said blasting hole; inserting weight in a lower cylinder portion of a bullet-shaped plug, said bullet-shaped plug having a cone on a lower end thereof; plugging a top of said lower cylinder portion of said bullet-shaped plug with a cylindrical plug, said cylindrical plug having upper tentacles attached thereto; dropping said lower cylinder portion of said bullet-shaped plug and said cylindrical plug into said blasting hole, said lower cylinder portion of said bullet-shaped plug and said cylindrical plug being lightweight to float on said water even with said weight; dropping of rocks into said blasting hole on top of said upper tentacles to cause said upper tentacles to flare outward and frictionally engage said blasting hole so that the top of said rocks remain above said water; loading on said top of said rocks said blasting hole with said dry blasting powder and a detonator s; and blowing said detonator and said dry blasting powder in said blasting hole.