E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/00 (2006.01) E21C 37/12 (2006.01) E21C 37/14 (2006.01) F42D 1/08 (2006.01) F42D 3/04 (2006.01)
Patent
CA 2707053
The invention relates to a method for small-charge blasting, and a rock drilling unit used therein. By means of a rock drilling machine (6) of the rock drilling unit (4), a drill hole (16) is first drilled into material (17) to be excavated, after which one or more cartridges (P) comprising a propellant charge are fed through a drilling tool (7) onto the bottom of the drill hole. The drilling unit comprises a cartridge feed station (14),which is separate from the rock drilling machine and from which the cartridges may be fed into a longitudinal channel (15) in the drilling tool.
Cette invention concerne un procédé d'abattage à petite charge ainsi qu'une unité de forage de roche associée. Au moyen d'un perforateur mécanique (6) de l'unité de forage de roche (4), un trou de forage (16) est d'abord foré dans un matériau (17) à excaver, suite à quoi au moins une cartouche (P) comprenant une charge de gaz propulsif est acheminée à par l'intermédiaire d'un outil de forage (7) vers le fond du trou de forage. L'unité de forage comprend un poste d'alimentation en cartouches (14) distinct du perforateur mécanique et à partir duquel les cartouches peuvent être acheminées dans un canal longitudinal (15) dans l'outil de forage.
Ahola Erkki
Raisanen Veikko
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Sandvik Mining And Construction Oy
LandOfFree
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