Binder-injecting rockbolt
A rockbolt is described for installation in a bore in the roof of an underground excavation to support the roof, comprising: a sleeve for permanent installation in the bore in the roof, the sleeve having an upper and a lower end and having means only in the upper end of the sleeve for defining at least one outlet port in the sleeve; a central member axially disposed in, and extending substantially the length of the sleeve, and defining an annular chamber in the sleeve; means for introducing binder material into the annular chamber in the sleeve near the lower end, the binder material traveling upwardly in the annular chamber, out the ports in the upper end of the sleeve, and downwardly between the sleeve and the bore wall; means for engaging the sleeve near the lower end to the roof face; means for engaging the sleeve near the upper end to the rock surrounding the bore; and means for tensioning the rockbolt to compress the rock between the upper and lower ends.
- Assignee:
- NOV; NOV-87-057092; EDB-87-092326
- Patent Number(s):
- US 4655644
- OSTI ID:
- 6828147
- Resource Relation:
- Patent File Date: Filed date 6 Jun 1984
- Country of Publication:
- United States
- Language:
- English
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