full face tunnel boring machine with tracks or a device to prepare for the aufstandflächen to fix, for

摘要

The system is used for setting up arched, or similar, support onits (15) open to the floor, in tunnels or galleries. The clear space in the supports (11) standing area is narrower than the foot interval of their ends. The machine is designed for driving forward underground. The aoxiliary device for this comprises two drilling machines (4,5) located on the two sides of the machine body, behind the driving tool. Their tool thrust runs in the lengthways direction of the support ends being fitted, and their drilling dia. exceeds the contours of the support ends. Each may be attached to a swivel arm (6,7), moving them from one end position within the gallery cross-section to another operative, end position.