Support column

Details Support column Support column

1993-11-24

1995-05-09

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405272, 2483542, E21D 1514

Patent

active

054134366

ABSTRACT:
A support column for underground mining has a hollow lower column component and a hollow upper column component. The upper column component is slidingly mounted in the lower column component. The bottom of the upper column component is a plate member. The circumferential outer surface of the plate member and the inner surface of the lower column component form an annular gap through which air and water can penetrate, while a non-hardening filler introduced into the interior space of the lower column component through a filling unit cannot penetrate through the gap. The filler accumulating in the interior space of the lower column component causes the upper column component to be moved relative to the lower column component and the support column is clamped between the abutments. The support column can be removed by discharging filler through an outlet opening in the lower column component.

REFERENCES:
patent: 881609 (1908-03-01), Nellen et al.
patent: 1765200 (1930-06-01), Bullough
patent: 4255071 (1981-03-01), Koppers et al.
patent: 4332512 (1982-06-01), Heinz mann et al.
patent: 5165824 (1992-11-01), Corcoran et al.
patent: 5273378 (1993-12-01), Merz et al.

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