METHOD OF DIRECTING DRILLING PATTERN IN CURVED TUNNELS, ROCKDRILLING RIG, AND SOFTWARE PRODUCT

摘要

The invention relates to a method of determining a direction of a drillin g pattern in tunnel curve calculation to be executed in a control unit of a rock drilling rig. The invention further relates to a software product imple menting the method, and a rock drilling rig. A tunnel line (16) of a tunnel to be excavated is determined e.g. by using curve fitting. A location of a d rilling site on the tunnel line is communicated to the control unit (11) and a navigation plane (19) of the drilling pattern (28) is positioned on the t unnel line. A start point (30) of a round is positioned on the tunnel line ( 16) and a length (L) of the round is provided. Further, an end point (31) of the round is positioned at a distance corresponding with the length of the round from the start point and a coordinate system (29) of the drilling patt ern is directed such that one of its axes points from the start point to the end point. Finally, different coordinate systems are transformed.