Mine prop headboard

Details Mine prop headboard Mine prop headboard

1993-03-03

1995-06-27

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

248357, 405289, E21D 1500, E21D 1530

Patent

active

054274761

ABSTRACT:
The mine prop headboard (10) is used to support an inflatable grout bag (44) and is located transversely on an end of an elongate mine prop (12) which is in use installed upright between a hanging wall and a footwall in a mine working. The headboard includes a chock assembly which is composed of parallel, elongate timber chocks (14). A steel reinforcement sheet is secured to and extends over the support surface of the chock assembly to provide tensile reinforcement a grout bag is placed on the headboard and is inflated with grout under pressure sufficient to apply a compressive axial force to the prop between the hanging wall and the footwall.

REFERENCES:
patent: 1528034 (1925-03-01), Thielmann
patent: 1946720 (1934-02-01), Stearns
patent: 2190556 (1940-02-01), Wiebecke et al.
patent: 3703269 (1972-11-01), Meriz
patent: 4004771 (1977-01-01), Plevak et al.
patent: 4120164 (1978-10-01), Tomlin
patent: 4465405 (1984-08-01), Durrfeld
patent: 4773792 (1988-09-01), Landers
patent: 5149228 (1992-09-01), Pienaar et al.
patent: 5186430 (1993-02-01), Ellithorpe
Brochure re Propsetter.TM. assembly distributed by HL&M Mining Timber, bearing a copyright date of 1992.

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