Methods of translating a face support

Details Methods of translating a face support Methods of translating a face support

1989-07-19

1990-09-18

Britts, Ramon S.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

405300, 405302, E21D 2314

Patent

active

049573276

ABSTRACT:
Methods are provided for translating a face support comprising a plurality of support units arranged side-by-side at an initial position. In the first embodiment, a first pair of alternately positioned support units are moved a predetermined distance from the initial position. Next, a second pair of alternately positioned support units are moved the predetermined distance. One of the support units of the second pair is positioned between the first pair. These moving steps are repeated until the entire plurality of support units is moved the desired distance. In the second embodiment, the first moving step is duplicated. Then, a single support unit located between the first pair is moved the predetermined distance. These two moving steps are repeated until all of the support units are moved.

REFERENCES:
patent: 2803444 (1957-08-01), Potts
patent: 4073151 (1978-02-01), Harmsma
patent: 4892446 (1990-01-01), Rachel
Jacobi: Automatisierung des Strebausbaus zur besseren Pflege des Hangenden, (1965), Gluckauf, p. 862.

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