Mine roof support plate bolt

Details Mine roof support plate bolt Mine roof support plate bolt

1979-09-17

1982-02-02

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Chemical

E21D 2002

Patent

active

043136974

ABSTRACT:
A mine roof support plate bolt formed from a concrete reinforcing rod has a head and flange at one end and a groove at the other end thereof, the groove forming opposed cutting edges at that end of the rod, and a counterclockwise, arcuate, helical channel in the section of the rod adjacent said other end, the counterclockwise, helical channel communicating with the groove, such that good mixing of resin adapted to secure the bolt in a bore hole is effected, while the cutting edges enable lengthening of the bore hole in instances where the rod would otherwise not pull the support plate flush with the roof structure.

REFERENCES:
patent: 3940941 (1976-03-01), Libert et al.
patent: 4194858 (1980-03-01), Evans

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