Drilling drive arrangement for underground construction and method for operating a drilling drive arrangement for underground construction

Abstract

The invention relates to a drilling drive arrangement for underground construction, with a drilling drive carriage which is mounted so as to be displaceable along a mast of a drilling rig for underground construction, wherein at least one rotary drive is arranged on the drilling drive carriage for rotary driving of a drilling tool for drilling into a ground, which rotary drive is configured as an electric motor. According to the invention, a control unit is provided for controlling the at least one electric motor with a drilling mode for drilling the drilling tool into the ground while removing soil material and a release mode for releasing soil material from the drilling tool, wherein, in the release mode, the current and/or voltage for supplying electrical energy of the at least one electric motor are automatically controlled in such a way that the drilling tool repeatedly performs a rotation-stop movement with or without a reversal of the direction of rotation.

Dependencies are inferred from the claim text.