F - Mech Eng,Light,Heat,Weapons – 42 – D
Patent
F - Mech Eng,Light,Heat,Weapons
42
D
F42D 3/00 (2006.01) E21B 43/263 (2006.01)
Patent
CA 2357680
Disclosed herein is a blasting apparatus for forming horizontal underground cavities and blasting method using the same. The blasting apparatus includes a metallic body provided in its center portion with a loading chamber, the discharge holes of the loading chamber facing laterally. A delayed detonator and a shaped explosive are loaded in the loading chamber of the body. A connecting ring is formed on the body for connecting the body to a hoisting rope. The blasting method includes the step of loading a detonator lead, a delayed detonator and a shaped explosive in a loading chamber. The blasting apparatus is suspended over a vertical pit by operating a hoisting device. The blasting apparatus is lowered to the entrance of a vertical pit, and a detonator lead drawn cut of the body is connected to a leading wire. The blasting apparatus and the leading wire are lowered into the vertical pit at a position where fluid discharges. The shaped explosive loaded in the blasting apparatus positioned at the position where fluid discharges or will discharge is detonated. The body of the blasting apparatus is retrieved by lifting the body using the hoisting device.
Gowling Lafleur Henderson Llp
Shim Dong Soo
LandOfFree
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