Patent Number: 6,293,355

Title: Method of controlling rock drilling

Abstract: A method of controlling rock drilling wherein the cut length changes from a predetermined cut length, the drilling length is changed by transferring the position of the pattern in the longitudinal direction of the tunnel so that the positions of the end points of the holes remain essentially the same with respect to one another, and a collaring surface is crosswise of the tunnel and different from the actual rock surface.

Inventors: Koivunen; Pertti (Tampere, FI), Sanerma; Simo (Lempaala, FI), Eilo; Erkki (Pirkkala, FI)

Assignee: Sandvik Tamrock Oy

International Classification: E21C 37/16 (20060101); E21D 9/00 (20060101); E21C 37/00 (20060101); E21B 44/00 (20060101); E21B 044/00 ()

Expiration Date: 09/25/2018