Tunnel roof supporting apparatus
OwnerJohn D. Hardinginventor
Life of this patent
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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has two relatively slidable gripping devices (5) or sets of devices to enable the apparatus to be advanced or withdrawn along the tunnel.
Claims18
Self-advancing roof-supporting apparatus for providing temporary support of a portion of the roof of a tunnel having spaced roof-support members therein, comprising a main frame;
- and means engageable with the roof-support members for suspending the apparatus therefrom, said means comprising at least one fixed gripping device and at least one movable gripping device slidable longitudinally of said frame, said gripping devices being arranged to selectively grip the roof-suppport members and at least one vertical hydraulic ram on which one of said gripping devices is mounted so as to be urged upwardly into engagement with the roof-support members.
Self-advancing roof-supporting apparatus for providing temporary support of a portion of the roof of a tunnel having spaced roof-support members therein, comprising a main frame;
- and means engageable with the roof-support members for suspending the apparatus therefrom, said means comprising at least one fixed gripping device and at least one movable gripping device slidable longitudinally of said frame, said gripping devices being arranged to selectively grip the roof-support members, and at least one hydraulic ram on which one of said gripping devices is mounted so as to be urged into engagement with the roof-support members.
Self-advancing roof-supporting apparatus for providing temporary support of a portion of the roof of a tunnel having spaced roof-support members therein, comprising a main frame;
- a slide frame slidably mounted on said main frame;
- and means engageable with the roof-support members for suspending the apparatus therefrom, said means comprising at least one fixed gripping device, at least two movable gripping devices, and resilient mountings which mount said movable gripping devices on said slide frame, whereby the spacing between the gripping devices may be varied to permit engagement of longitudinally spaced gripping devices on adjacent roof-support members which are spaced at non-standard intervals.
Self-advancing roof-supporting apparatus for providing temporary support of a portion of the roof of a tunnel having spaced roof-support members therein, comprising a main frame;
- a slide frame slidably mounted on said main frame and also being mounted to be rotatable relative thereto;
- means engageable with the roof-support members for suspending the apparatus therefrom, said means comprising at least one fixed gripping device, and at least one movable gripping device mounted on said slide frame;
- and a hydraulic ram mounted on said slide frame and acting upon said main frame so as to rotate the slide frame relative to the main frame.
Dependencies are inferred from the claim text.