Method of drilling a hole in a rock
AssigneeTamrock Oy
InventorUnto Mattero
Life of this patent
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Abstract
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.
Claims4
A method of controlling a rock drilling process, wherein a drilling machine has percussion power (P.sub.p) and feed force (f.sub.c) adjustable to optimize the drilling process so that the rotation power of the drill is no more than a preset limit value, comprising the steps of:
- controlling the drilling automatically in sequential stages;
- establishing at least three successive drilling stages including a first drilling stage for start-up drilling, a second stage comprising a transition stage from start-up drilling to a normal hole drilling stage, and a third stage comprising the normal hole drilling wherein appropriate values are set for drilling at each drilling stage to carry out the drilling;
- setting parameters affecting the percussion power (P.sub.p) and the feed force (f.sub.c) at each drilling stage so that the percussion power (P.sub.p) and the feed force (f.sub.c) are optimal for each drilling stage.
Dependencies are inferred from the claim text.