Method of controlling rock drilling

Details Method of controlling rock drilling Method of controlling rock drilling

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) E21C 37/16 (2006.01) E21D 9/00 (2006.01)

Patent

CA 2293746

In the method, when the cut length to be blasted 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 in respect of each other. A collaring surface is crosswise of the tunnel and different from the actual rock face. The collaring surface is maintained the same in the method.

Selon ce procédé, lorsque la longueur forée à faire sauter s'écarte d'une longueur forée prédéterminée, la longueur à forer est modifiée par transfert de la position du gabarit dans le sens longitudinal du tunnel de façon que les positions des points d'extrémité des orifices restent essentiellement identiques les unes par rapport aux autres. La surface d'amorçage du trou, perpendiculaire à l'axe du tunnel, se distingue de la paroi rocheuse. La surface d'amorçage de trou est maintenue identique dans ce procédé.

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