Arch useful for withstanding effect of rockburst occurring in un

Details Arch useful for withstanding effect of rockburst occurring in un Arch useful for withstanding effect of rockburst occurring in un

1998-03-31

2000-08-15

Lillis, Eileen Dunn

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

4052591, E21D 1522, E21D 15502, E21D 1556

Patent

active

06102628&

ABSTRACT:
An arch useful for withstanding effects of rock burst occuring in underground mines/tunnels. The arch comprises a curved U-section arch provided on both ends with slidingly coupled U-section arch pieces, the coupled top and bottom pieces being provided with at least two guides on both sides. The guides are slidingly coupled with the bottom section aches, the ends of the top section arch being placed on upper holder plates, the upper holder plates being fixed with the bottom sections on both sides. The bottom portion arches also having at least one lower pair of holder plates fixed on both sides below the upper holder plates.

REFERENCES:
patent: 1821020 (1931-09-01), Mensforth
patent: 2036490 (1936-04-01), Neilson et al.
patent: 2713774 (1955-07-01), Heintzmann et al.
patent: 2749713 (1956-06-01), Paurat
patent: 3126708 (1964-03-01), Jasper
patent: 3168815 (1965-02-01), Blenkle et al.
patent: 3395542 (1968-08-01), Deloffre
patent: 4173421 (1979-11-01), Harhoff et al.
patent: 4334800 (1982-06-01), Stuckmann
patent: 4997317 (1991-03-01), Schonfeld et al.

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