Method for breaking rock
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United States of America Patent
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Feb 22, 2011
Grant Date -
Jan 3, 2008
app pub date -
Sep 23, 2005
filing date -
Sep 24, 2004
priority date (Note) -
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Abstract
The invention relates to a method for breaking rock to be drilled in rock drilling, in which method the rock to be drilled is subjected to successive stress pulses via a tool. The method comprises stress pulses being exerted on the rock at a high frequency, and the load proportion calculated on the basis of the values of the frequency and the length (t.sub.p) of the stress wave being at least 0.075.
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