Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1990-05-04
1992-01-21
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
4052595, E21D 2002
Patent
active
050823990
ABSTRACT:
The mine roof anchor includes a roof bolt assembly with an expansion shell assembly secured at the end of the bolt inserted into the bore hole. The expansion shell assembly includes a friction reducing means to increase the horizontal force on the leaves and the bolt assembly includes an adjustable resin retaining washer to compress the resin in the bore hole.
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"Bethlehem Roof and Rock Bolts", Bethlehem Steel, Catalog 2366-A.
"Bethlehem Mine Roof Bolts and Accessories", Bethlehem Steel, Booklet 325.
Frease Jerry E.
Grissinger Glen S.
Stankus John C.
Stewart Eugene H.
Jennmar Corporation
Price, Jr. S. J.
Ricci John
Taylor Dennis L.
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