Mine roof supporting truss system
A truss-type support system is described for the roof of a mine passageway consisting of: (a) a pair of anchor members in the form of first and second elongated rods installed in drill holes formed in the roof on opposite sides of the passageway, one end of the anchor members being permanently anchored in the drill holes and the other end extending outside the holes; (b) a pair of support plates each having an opening through which a respective one of the other ends of the anchor members passes; (c) a pair of blocks structurally separate from the plates, the blocks each having an opening through which a respective one of the other ends of the anchor members passes with the plates between the blocks and the mine roof; (d) each of the blocks further including a curved surface extending for approximately 180 degrees about an axis passing through the opening therein substantially normal to the mine roof; (e) means of the other ends of the anchor members for maintaining the blocks in forceful engagement with the plates, and the plates in forceful engagement with the mine roof in the area surrounding the drill holes; (f) a pair of U-bolts having closed ends extending around the curved surfaces of the blocks to free ends directed toward one another; (g) means connecting the free ends of the U-bolts; and (h) first and second tensioning means for applying a desired degree of tension to the anchor members and the U-bolts, respectively, the second tensioning means being positioned at and accessible from a location substantially laterally of the center of the mine passageway.
- Assignee:
- Eastern Co., Naugatuck, CT
- Patent Number(s):
- US 4596496
- OSTI ID:
- 5607181
- Country of Publication:
- United States
- Language:
- English
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