Temporary roof support for mines

Details Temporary roof support for mines Temporary roof support for mines

1991-11-25

1992-10-20

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405303, E21D 1900, E21D 2000

Patent

active

051564971

ABSTRACT:
A temporary support for a mine roof is mounted on a mobile roof bolter, and includes a main support frame pivotably connected to the bolter, a main support beam and a ground contacting beam, both extending along the same axis in front of the main support frame, and connected to each other and to the main support frame by a scissors pivot joint and a leveling pivot joint, respectively. When the scissors pivot joint opens and closes, the main support beam and ground contact beam raise and lower with respect to each other and with respect to the ground. A cross beam is mounted on the main support beam and transverse to the axis thereof, and raises and lowers in the same plane with respect to the mine face, to contact and support the mine roof.

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patent: 3961487 (1976-06-01), Blumenthal
patent: 3971225 (1976-07-01), Wertelewski et al.
patent: 4236850 (1980-12-01), Koppers et al.
patent: 4252475 (1981-02-01), Cobb et al.
patent: 4266891 (1981-05-01), Plevak et al.
patent: 4269547 (1981-05-01), Harding
patent: 4284368 (1981-08-01), Albright
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patent: 4460294 (1984-07-01), Cobb et al.
patent: 4595316 (1986-06-01), Tinnel
patent: 4662796 (1987-05-01), Fanget
patent: 4797023 (1989-01-01), Park

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