Compressible mine support

Details Compressible mine support Compressible mine support

1975-09-03

1977-10-04

Hafer, Robert A.

Supports

Props and braces

Adjustable length

E04G 2500

Patent

active

040520293

ABSTRACT:
This invention relates to a mine support for use in a hard rock deep level mine in which the hanging and foot walls in stopes are subject to closure. The support consists of a timber load-resisting element which is tightly housed in a sleeve of material which has a variable effective length and is adapted to contain transverse spread of the timber while the support is being compressed by the closing hanging and foot walls. It is essential to the invention that in use the grain of the timber element lies in the direction of the compressive load.

REFERENCES:
patent: 1752101 (1930-03-01), Meutsch
patent: 3454397 (1969-07-01), Yoshioka et al.

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