Method for disconnecting a drilling rod segment of a drilling rod of a raise-boring machine and raise-boring machine

摘要

The method involves screwing an upper end a bolting of an upper drill pipe segment (5) to a rotary drive unit (2). A drill string (4) is rotated around its longitudinal axis (L) in an angular position in which a starting key of the machine is attached to a key surface (18) in the upper region of another drill pipe segment (6). An independent claim is also included for a raise boring machine with a drill string.