Telescopic mine roof support
OwnerMichael T. Shook, Charles C. Lashinventors
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 partially filled with a solid compressible filler material and a second support section at least partially filled with a second solid compressible filler material. The second support section is at least partially disposed within the first elongate outer shell and is telescopically extendable relative thereto. A bladder is interposed between the first and second support sections that is fillable in situ to cause extension of the second support section relative to the first support section when filled under pressure with a filler material.
Claims23
A longitudinally yieldable support, comprising:
- a first support section comprising a first elongate outer shell partially filled at a first end portion with a first solid compressible filler material and defining a opening at a second end of the first elongate outer shell between a second end and a top of the first solid compressible filler material;
- and
- a second support section comprising a second elongate outer shell at least partially filled with a second solid compressible filler material positioned in the opening of the first outer shell, the second elongate outer shell having an outer diameter that is slightly smaller than a diameter of the first elongate outer shell to allow the second elongate outer shell to slide relative to the first elongate outer shell;
- a port in communication with a space between the top of the first compressible filler and a bottom of the second compressible filler configured for filling the space with a third filler material under pressure to cause the second support section to rise relative to the first support section in order to span a space between a floor and a roof of an underground entry.
The support of claim 3, wherein the second elongate outer shell is movable in a telescopic manner from a first position in which the second elongate outer shell is at least partially disposed within the first elongate outer shell to a second position in which a portion of the second elongate outer shell is maintained within the second elongate outer shell and a top of the second elongate outer shell is in contract with a roof of a mine entry.
A method of installing a longitudinally yieldable support in an underground entry, comprising:
- providing a first support section comprising a first elongate outer shell partially filled at a first end portion with a first solid compressible filler material and defining a opening at a second end of the first elongate outer shell between a second end and a top of the first solid compressible filler material;
- providing a second support section comprising a second elongate outer shell at least partially filled with a second solid compressible filler material positioned in the opening of the first outer shell, the second elongate outer shell having an outer diameter that is slightly smaller than a diameter of the first elongate outer shell to allow the second elongate outer shell to slide relative to the first elongate outer shell;
- and
- pumping a third filler material through a port in communication with a space between the top of the first compressible filler and a bottom of the second compressible filler configured for filling the space with a third filler material under pressure to cause the second support section to rise relative to the first support section until the support abuts against a roof of an underground entry.
Dependencies are inferred from the claim text.