| 摘要 |
A support for a mine opening includes an elastic plate member with a preformed curvature across its length. Two props at each end of the plate member provide support after emplacement into a load-bearing contact with the roof stratum in a flattened or near flattened configuration to exert substantially uniform pressure against the roof stratum. Rectangular tubes form chock blocks connected to the ends of the plate member. Each chock block includes a clevis to retain the ends of the two props. A spacer maintains a small clearance between the roof and the terminal end portions of the plate member and an anchor pin connects each chock block to the plate member.
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