B - Operations – Transporting – 25 – D
Patent
B - Operations, Transporting
25
D
B25D 9/00 (2006.01) E21B 1/00 (2006.01)
Patent
CA 2581325
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 (tp) of the stress wave being at least 0.075.
L~invention concerne un procédé de concassage de roche à forer par forage de roche, procédé dans lequel la roche à forer est soumise à des impulsions de choc successives par un outil. Le procédé comprend l~application d~impulsions de choc à une fréquence élevée sur la roche, la proportion de la charge étant calculée en fonction des valeurs de la fréquence, la durée (tp) de l~onde de choc étant d~au moins 0,075.
Ahola Erkki
Esko Mauri
Helin Aimo
Keskiniva Markku
Maeki Jorma
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Sandvik Mining And Construction Oy
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