Arrangement for controlling percussive rock drilling

E - Fixed Constructions – 21 – B

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E21B 44/06 (2006.01)

Patent

CA 2581324

The invention relates to a method and a software product for controlling percussive rock drilling, and further to a rock drilling rig to which the method is applied. The invention comprises monitoring the rotation resistance, the aim being to keep it below a desired reference value. To adjust the rotation resistance, successive control actions may be carried out, such as decreasing the feed force, decreasing the percussion power and stopping the feed. Control actions are started once a limit set for the control has been exceeded. At least one limit is a time limit determining the time difference between two successive control functions.

Procédé et produit logiciel de contrôle du forage par percussion de roches et équipement de forage de roches associé. Le procédé consiste à contrôler la résistance à la rotation dans le but de la maintenir en-dessous d'une valeur de référence souhaitée. Afin de régler la résistance à la rotation, des actions successives de contrôle peuvent être menées de manière à décroître la force d'avance, à diminuer la puissance de percussion et à arrêter l'avance. Des actions de contrôle sont initiées après dépasser d'une limite définie pour le contrôle. Au moins une limite constitue une limite temporelle déterminant la différence temporelle entre deux fonctions successives de contrôle.

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