Channel-profile mine extension arches - are extracted by release harness comprising stop claw and clamp wedge

摘要

The harness consists of a stop claw (5) with a flange arm (8), a clamp part (7), and a connecting chain (6). The stop claw is formed with a U-shape, connecting the flange arm (8) to a base arm (9) with a bridge (10) extending parallel to a further bridge of a surrounding channel profile segment (2). The base arm (9) is provided with a clamp wedge reception point (12) for the wedge (7) extending parallel to the further bridge. This reception point consists of a part of a recess (17) forming counter bearing surface (18) for the clamp wedge (7). The ratio between the length of the counter bearing surface and that of the clamp wedge is approximately 1:3. USE - To extract channel-profiled mining extension arches.