A method for the removal of a drilling rod segment of the drill rod assembly of a raise - - boring machine and raise - - boring machine

摘要

Raise - - boring machine (100) and method for removal of a drilling rod segment (5, 6, 7), wherein each pipe string segment (5, 6, 7) at its upper area, at least in the operating position, a key surface (18), and with a heb - and lowerable rotary drive mechanism (2) for the rotary drive of the drill rod assembly (4), with which the first drill string segment (5) is screwed, whereby the rotary drive mechanism (2) comprises a rotation angle pick-up (30) with a control means (31) for the rotary drive mechanism (2) communicates in such a way that a rotation of the drill rod assembly (4) in rotary angle positions can be stopped, in which the at least one key surface (18) in a for the mechanical attachment of a recovery - or refractive index key (17, 25) suitable angular position is located, and that after attachment of the refractive index key (25) for the release of the borehole surface and the rod segments are screwed together by an angle of rotation takes place, the mechanical removal of the refractive index key (25) is made possible.