APPAREIL, DISPOSITIF DE FORAGE DE ROCHES ET PROCÉDÉ DE FORAGE DE ROCHES

摘要

The invention relates to an apparatus, rock drilling rig and method for rock drilling. The apparatus comprises a turning device (TD) for moving a drilling tool (8) around longitudinal axis of the tool. The turning movement (T) is controlled by means of an alternating turning system (ATS) so that direction of turning movement is continuously reversed to first and second turning directions. Turning angle of the tool is restricted and a safety system (SS) is configured to monitor the operation and to ensure that a predetermined turning angle is not exceeded.