| 摘要 |
<p>1. Channel profile member for relatively-displaceable yieldable mine arch supports, with a strengthened base (3) and curved side webs (4), which run into outwardly-directed flanges (5) having a central thickness (52) which corresponds to 0.9 to 1.1 times the base thickness (31) and a central height (51) which corresponds to 1.25 to 1.50 times the base thickness (31), the base (3) being flattened externally, characterized in that the minimum web thickness (41) at the flanges (5) corresponds to 0.30 to 0.35 times the base thickness (31) and the base (3) is flattened externally to have, at a maximum, a width (32) corresponding to the base thickness (31) and the full width (23) of the profile member amounts to 0.9 to 1.1 times the full profile height (22).</p> |
