| 摘要 |
<p>The invention concerns a wall support strap which is typically used to provide localised support to the hanging wall or roof, or other wall of a mine working. The strap (10) of the invention has several tendons (12) which are held together in spaced apart, generally parallel relationship by means of spaced apart, generally parallel strap members (14) which extend transversely to the tendons. At least some of the strap members each comprise a generally fiat, elongate strip (16) formed with longitudinally extending slits (18, 30) at longitudinally spaced apart slit positions. Strap material (20, 30) on one side of the slit is deformed, in a direction transverse to the length of the strip, relative to strip material (22, 32) on the other side of the slit so as to define openings (26) in the strip through which the tendons pass.</p> |
