| 摘要 |
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.
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