Deformable rock bolt
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United States of America Patent
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-
Dec 25, 2012
Grant Date -
Jan 28, 2010
app pub date -
Dec 21, 2007
filing date -
Dec 22, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A rock bolt for being grouted in a borehole, —includes an elongate cylindrical massive stem (1) with extensive lengths of stem portions (1s) separated by integrated anchors (2). The anchors are distributed with separations along the length of the stem (1). The anchors (2) are locally anchored relative to their local borehole wall portions for taking up load arising due to rock deformation. The stem portions (1s) are arranged for slipping relative to the grout or the borehole so as for each of the stems (1s) to take up local elongation strain between pairs of locally anchored preceding and consecutive anchors.
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