US 4,630,973 AGranted

Peripherally flexible prop arch for mining tracks, tunnels or the like

AssigneeBochumer Eisenhuette Heintzmann GmbH & Co.

InventorsPeter Heintzmann, Manfred Koppers, Karlheinz Bohnes, Lothar Domanski

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Abstract

A peripherally flexible arch for propping rock structure for mining tracks, tunnels or the like is comprised of a plurality of partially overlapped elongated segments, each of which has an end portion extended toward the rock structure, a bottom portion opposite to the end portion, and a lateral flange offset from the end portion laterally and in the direction toward the bottom portion. Clamping devices are arranged at the ends of the overlapping regions of the segments to clamp the segments to each other. The end portion of each lower segment is inserted into a groove formed between the end portion and the flange portion of each upper segment at the side of this segment facing away from the rock structure. Each clamping device has a hook engaged in a groove formed between the end portion and the flange of the upper segment at the side of this segment facing toward the rock structure.

Claims12

Dependent claims

A peripherally flexible prop arch for mining tracks, tunnels or the like for propping a rock structure or a backfill material, comprising at least two elongated gutter-shaped segments partially overlapping one another to define an overlapping region and having end portions superposed one on another and extended in the same direction and having congruent cross sections;

and clamping devices each applied to said segments at said overlapping region to clamp said segments to each other, the end portion of each segment being directed toward the rock structure and having an end, each segment further having a bottom portion directed away from the rock structure and a lateral flange offset from said end portion in the direction toward said bottom portion, each flange being formed with a first elongated groove facing and open toward said rock structure and extended along the elongation of the segment and an opposite second elongated groove facing toward said bottom portion, each clamping device including at an upper end thereof facing the rock structure a hook designed so as to completely fill said first groove and engaged in said firs groove, and at a lower end thereof a claw-shaped portion engaged in said second groove, the lateral flange of each segment including a flange edge portion extended toward the rock structure and limiting said first groove from outside, said edge portion being spaced from said end of the end portion in the direction toward said bottom portion at least such a distance that the hook of said clamping device is engaged with said edge portion and said hook does not extend beyond the end of the end portion of said one segment in the direction toward said rock structure at any place along the elongation of said one segment.

A peripherally flexible prop arch for mining tracks, tunnels or the like for propping a rock structure or a backfill material, comprising at least two elongated gutter-shaped semgents partially overlapping one another to define an overlapping region and having end portions superposed one on another and extended in the same direction and having congruent cross sections, one of said segments having a segment projection while the other of said projection segments has a segment groove;

and clamping devices each applied to said segments at said overlapping region to clamp said segments to each other, the end portion of each segment being directed toward the rock structure and having an end, each segment further having a bottom portion directed away from the rock structure and a lateral flange offset from said end portion in the direction toward said bottom portion, each flange being formed with a first elongated groove facing and open toward said rock structure and extended along the elongation of the segment and an opposite second elongated groove facing toward said bottom portion, each clamping device includng at an upper end thereof facing the rock structure a hook designed so as to completely fill said first groove and engage in said first groove, and at a lower end thereof a claw-shaped portion engaged in said second groove, so as to completely fill said second groove in a clamped condition in which said segment projection of said one segment engages in and completely fills said segment groove of said other segment, the lateral flange of said segment including a flange edge portion extended toward the rock structure and limiting said first groove from outside, said edge portion being spaced from said end of the end portion in the direction toward said bottom portion at least such a distance that the hook of each clamping device is engaged with said edge portion and said hook does not extend beyond the end of the end portion of said one segment in the direction toward said rock structure at any place along the elongation of said one segment.

Dependencies are inferred from the claim text.