Rock drill and method of breaking rock

Details Rock drill and method of breaking rock Rock drill and method of breaking rock

E - Fixed Constructions

21

C

E21C 37/12 (2006.01) E21B 7/00 (2006.01)

Patent

CA 2601568

A method of breaking rock which includes the steps of drilling a hole in the rock using a drill rod (18); leaving the drill rod in the hole; using water flow to direct a propellant charge (40) into the hole through a passage (116) in the drill rod (18); and at a leading end of the drill rod, firing the propellant charge with, at least, the drill rod and water in the hole and passage providing a stemming function.

La présente invention concerne un procédé pour briser la roche, qui consiste à forer un trou dans la roche en utilisant une tige de forage, à laisser la tige de forage dans la roche, à utiliser un courant d'eau pour diriger une charge de propulseur dans le trou à travers un passage dans la tige de forage, puis à mettre à feu la charge de propulseur, au niveau d'une extrémité de tête de la tige de forage, avec au moins la tige de forage et l'eau dans le trou et dans le passage assurant une fonction de bourrage.

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