Method and equipment for small-charge blasting
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United States of America Patent
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Jan 1, 2013
Grant Date -
Oct 28, 2010
app pub date -
Dec 17, 2008
filing date -
Dec 27, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for small-charge blasting, and a rock drilling unit used therein. By means of a rock drilling machine of the rock drilling unit, a drill hole is first drilled into material to be excavated, after which one or more cartridges comprising a propellant charge are fed through a drilling tool onto the bottom of the drill hole. The drilling unit comprises a cartridge feed station, which is separate from the rock drilling machine and from which the cartridges may be fed into a longitudinal channel in the drilling tool.
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