Sliding supporting gallery
AssigneeCharbonnages de France
InventorsGuy Blampain, Pierre Grandfils
Life of this patent
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Abstract
A gantry support for supporting a roof of a passage is advanceable along a floor of the passage. The support has two parallel supporting elements mutually spaced apart laterally of the support, each element including at least two pairs of frames provided with articulated tracks. One frame of each pair is an upper frame and the other is a lower frame, the tracks of which are adapted to be applied respectively against the roof and floor of the passage by loading jacks applying a spreading force between the upper and lower frames. An intermediate upper frame is carried by an upper cross-member extending from one supporting element to the other and at least one loading jack applying a spreading force connects each lower frame to the corresponding end of the upper cross-member.
Claims10
A roof support for use in mines between a roof and a floor comprising two pairs of frames spaced from each other laterally of the support and each including an upper frame provided with an articulated track and a lower frame provided with an articulated track, wherein the frames are spaced apart by a large passage for use as heading, an upper cross-member extending between said upper frames, the opposite ends of said upper cross-member being connected to said upper frames, an intermediate upper frame having an articulated track being carried by said upper cross-member and located between said upper frames, jack means associated with each pair of frames and operable to apply a force between the lower frames and the upper cross-member to cause the track of the intermediate upper frame to be applied against the roof of the passage.
Dependencies are inferred from the claim text.