Apparatus for widening a tunnel and method for expanding a tunnel.

摘要

In an apparatus and a method for expanding a tunnel from a Alttunnelgewölbe limited Altlichtraum on a Neulichtraum axially displaceable locking plates (12, 13) are present, the Alttunnelgewölbe during a single-track or double-rail operation in a mining area against early or unwanted Secure escape. This achieves efficient expansion.