A yielding rock bolt

Details A yielding rock bolt A yielding rock bolt

E - Fixed Constructions

21

D

E21D 21/00 (2006.01)

Patent

CA 2510178

A yielding rock bolt (10) having a solid metal shaft (12) with a relatively wide portion (64) and a relative narrow portion (60) and an anchor member (14) mounted about the shaft (12). The anchor member (14) has longitudinal bore (40) which is of lesser dimension than the relatively wide portion (64). The anchor member (14) is mounted about the relatively narrow portion (60) adjacent the wide portion (64). In use the shaft (12) is extruded through the anchor member (14) to cause the rock (10) to yield as a rock face moves.

L'invention concerne un boulon d'ancrage coulissant (10) qui possède une tige métallique solide (12) comprenant une partie relativement large (64) et une partie relativement étroite (60), et un élément d'ancrage (14) disposé autour de la tige (12). Ledit élément d'ancrage (14) possède un alésage central (40) de dimension inférieure à la partie relativement large (64). Ledit élément d'ancrage (14) est disposé autour de la partie relativement étroite (60) de manière adjacente à ladite partie relativement large (64). En cours d'utilisation, la tige (12) est extrudée à travers ledit élément d'ancrage (14) afin d'amener ledit boulon d'ancrage (10) à coulisser à mesure que la face d'un rocher bouge.

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