Mine strata support structure

Details Mine strata support structure Mine strata support structure

1994-11-25

1996-08-13

Ricci, John A.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

4053022, E21D 2100

Patent

active

055449824

ABSTRACT:
Mine strata support structure and components in a mine truss and including a mine bracket and a connector, the latter preferably being in the form of an elongated stirrup; the mine bracket, stirrup and associated structure are constructed and dimensioned such that the stirrup may be brought into retentive engagement with the bracket and not slip inadvertently out of engagement; this can be produced through the employment of a depending projection which vertically depends from the bearing plate of the bracket, such projection serving with the body of the bracket to supply an access path for stirrup installation, the projection deterring excess rearward travel of the stirrup whereby to maintain bracket-stirrup inter-engagement, and thus truss-integrity, even during conditions of mine strata shock.

REFERENCES:
patent: 4596496 (1986-06-01), Tyrell et al.
patent: 4699547 (1987-10-01), Seegmiller
patent: 4934873 (1990-06-01), Calandra
patent: 4960348 (1990-10-01), Seegmiller
patent: 5026217 (1991-06-01), Seegmiller
patent: 5176473 (1993-01-01), Seegmiller
patent: 5302056 (1994-04-01), Calandra et al.

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