Tunnel roof supporting apparatus

Details Tunnel roof supporting apparatus Tunnel roof supporting apparatus

1979-05-21

1981-05-26

Taylor, Dennis L.

Hydraulic and earth engineering

Miscellaneous

E21D 15582, E21D 1558

Patent

active

042695473

ABSTRACT:
The invention relates to a self-advancing roof supporting apparatus for providing temporary support of a portion of the roof of a tunnel, for example in an underground mine such as a coal mine. When tunnels are being extended, temporary roof supports need to be erected while the newly excavated material is removed and permanent roof supports installed.
The apparatus of the invention has means engageable upon the permanent roof-supports to suspend the apparatus therefrom, and preferably has two relatively slidable gripping devices (5) or sets of devices to enable the apparatus to be advanced or withdrawn along the tunnel.

REFERENCES:
patent: 1382668 (1921-06-01), O'Rourke
patent: 3678694 (1972-07-01), Haspert
patent: 4075856 (1978-02-01), Sigott et al.

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