| 摘要 |
Abstract The invention relates to a rock drilling rig and a method of positioning a rock drilling unit. The rock drilling rig (5) is provided with a detection device (4) for detecting a reference line (RL), such as a previously drilled dril[ hole fan (1). The detection device is positioned in the direction of gravity (G). The position and direction of the detected reference line are utilized when positioning a drill ing unit to a new drilling position at a predetermined horizontal reference dis tance (RD) from the reference line. (Figure 3) FIG. 1 FIG. 2 4-2a 3a 3, 5 7b |
