Telescopic mine roof support
AssigneeBurrell Mining Products, Inc.
InventorsMichael T. Shook, Charles C. Lash
Life of this patent
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Abstract
A longitudinally yieldable support for underground roof support includes a first support section with a first elongate outer shell filled with a solid compressible filler material and a second support section filled with a second solid compressible filler material with a second elongate outer shell extending above the first elongate outer shell. The second support section has density that is greater than a density of the first solid compressible filler material. A pair of attachment members are coupled to the second elongate outer shell and are configured for lifting the second elongate outer shell relative to the first elongate outer shell and for securing the second elongate outer shell relative to the first elongate outer shell once lifted.
Claims21
A longitudinally yieldable support for a mine entry, comprising:
- a first support section comprising a first elongate outer shell substantially entirely filled with a first solid compressible filler material;
- and
- a second support section comprising a second elongate outer shell extending above the first elongate outer shell and telescopically engaged therewith, the second elongate outer shell having an outer diameter that is different than a diameter of the first elongate outer shell to allow the second elongate outer shell to upwardly slide relative to the first elongate outer shell until a top of the second elongate outer shell abuts against a roof of a mine entry, and the second elongate outer shell fillable in situ with a second compressible filler material having a density that is at least as great as a density of the first solid compressible filler material when cured, with the second solid compressible filler extending from proximate a top of the first compressible filler to the roof to be in direct contact therewith;
- and
- a plurality of attachment strap members coupled to the second elongate outer shell each having a securing portion for coupling at least one of the second elongate outer shell to the first elongate outer shell and the second elongate outer shell to the roof, at least until the second solid compressible filler cures, the plurality of attachment strap members each comprised of an elongate strap that is coupled to the second elongate outer shell by wrapping around a lower end thereof and further comprises a securing portion for securing the second elongate outer shell relative to the first elongate outer shell.
A longitudinally yieldable support for supporting a roof in an underground mine, comprising:
- a first support section comprising a first elongate outer shell comprised of metal filled with a first aerated concrete;
- a second support section comprising a second elongate outer shell comprised of metal extending above the first elongate outer shell, the second elongate outer shell having an outer diameter that is different than a diameter of the first elongate outer shell to allow the second elongate outer shell to slide in a telescopic manner relative to the first elongate outer shell, the second elongate outer shell fillable in situ with a second aerated concrete;
- and
- a pair of attachment strap members coupled to the second elongate outer shell configured for securing the second elongate outer shell relative to the first elongate outer shell once lifted, wherein the pair of attachment strap members are each comprised of an elongate metal strap that is coupled to the second elongate outer shell by wrapping around a lower end thereof and further comprises a securing portion for securing the second elongate outer shell relative to the first elongate outer shell.
Dependencies are inferred from the claim text.