Method of drilling a hole in a rock

Details Method of drilling a hole in a rock Method of drilling a hole in a rock

E - Fixed Constructions

21

B

E21B 44/00 (2006.01)

Patent

CA 2099248

A method of controlling a rock drilling process by adjusting the percussion power and the feed force of a drilling machine. In the method, the drilling is carried out automatically in stages so that the percussion power and the feed force as well as drilling time or drilling depth are adjusted at a start-up drilling stage, and the ratio between the percussion power and the feed force is adjusted at a transition stage while increasing them until the set value of normal drilling is achieved. In normal drilling, the feed force is adjusted so that the rotation power remains at the set value.

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