Collapsible crib mining support column

Details Collapsible crib mining support column Collapsible crib mining support column

1993-02-26

1994-08-30

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

2483541, 405303, E21D 1100

Patent

active

053421507

ABSTRACT:
A roof support column used as a support between the roof and floor of a mine comprises a stacked series of hollow roof support cribs containing a mixture of light-weight aggregate such as volcanic lava, tuft, or pumice, and a chemical foam contained in a double-walled high density paper tubing. The combination of these materials results in a roof support crib which has the yielding characteristics of wood. Such cribs called variable yielding cribs are stacked and locked on top of one another to form a vertical cylindrical cribbing support column.

REFERENCES:
patent: 931466 (1909-08-01), Nellen
patent: 4194997 (1980-03-01), Edler
patent: 4195111 (1980-03-01), Rautenbach
patent: 4267222 (1981-05-01), Sanders
patent: 4565469 (1986-01-01), Chlumecky
patent: 5143484 (1992-09-01), Deul

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