Flexible rock bolt

Details Flexible rock bolt Flexible rock bolt

1975-02-11

1976-03-09

Shapiro, Jacob

52698, 85 20, 85 64, E21D 2002, F16B 1304

Patent

active

039423298

ABSTRACT:
A flexible rock bolt for use in anchoring mine structures to ground formations and in supporting such structures which consists of a rock bolt helically coiled into a spring shape having relatively large pitch and a spring index of at least two which allows the rock bolt to elongate upon application of tension and torsion loading and allows the rock bolt to contract under compression.

REFERENCES:
patent: 2690693 (1954-10-01), Campbell
patent: 3394527 (1968-07-01), McLean
patent: 3478640 (1969-11-01), Elders
patent: 3653217 (1972-04-01), Williams
patent: 3698196 (1972-10-01), Jankowski et al.

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