Method of and arrangement for setting anchors in loose rock ranging from cohesion-poor to non-cohesion rocks
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United States of America Patent
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Sep 3, 1991
Grant Date -
N/A
app pub date -
Nov 29, 1989
filing date -
Nov 29, 1988
priority date (Note) -
Expired
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Abstract
During setting of anchors in loose rocks ranging from cohesion-poor to non-cohesion rocks, an anchor including a drilling rod and a drilling crown is used, in which the drilling rod is provided with a central axial opening and with radial opening in the region to the drilling crown to supply a mortar suspension or the like through the central axial opening during the drilling process.
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