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US 2017/0159433 A1Published application
Ventilated mine roof support
AssigneeBurrell Mining Products, Inc.
InventorMichael T. Shook
Life of this patent
Estimating the term…
Abstract
A longitudinally yieldable support for underground roof support includes first and second outer shell portions having a first wall thickness and a third outer shell portion having a second wall thickness that is greater than the first wall thickness. The support is filled with a solid compressible filler material. At least one air ventilation tube extends between opposite sides of the third outer shell portion to allow a flow of air through the support as the first and second outer shell portions and filler material therein yield under load.
Claims24
A longitudinally yieldable support, comprising:
- a first outer shell portion in the form of a column comprising a first outer wall portion and having a first longitudinal axis;
- a second outer shell portion in the form of a column comprising a second outer wall portion and having a second longitudinal axis substantially aligned with the first longitudinal axis;
- a third outer shell portion in the form of a column comprising a third outer wall portion and having a third longitudinal axis substantially aligned with the first and second longitudinal axes, the third outer shell portion interposed between the first and second outer shell portions so that the first, second and third outer shell portions are in a stacked arrangement, the third outer shell portion having an effective thickness of the third outer wall portion that is greater than first or second wall thicknesses of the first and second outer wall portions, respectively, the third outer shell portion defining a first pair of apertures located along the third outer wall, the first pair of apertures each positioned on opposite sides of the third outer shell portion from one another;
- a first air ventilation tube having first and second ends attached to the third outer wall and extending transversely across the third outer shell at a location of and between the first pair of apertures to allow air to flow through the first pair of apertures and the first air ventilation tube;
- and
- a solid compressible filler material disposed within and substantially filling the first, second and third outer shell portions and encapsulating the first air ventilation tube within the elongate outer shell;
- the third outer shell portion having a wall thickness sufficient to prevent the third outer shell portion from collapsing or yielding as at least one of the first or second outer shell portions and solid compressible filler material therein yield to prevent the first air ventilation tube from collapsing or yielding to maintain a flow of air through the first air ventilation tube as the at least one of the first or second outer shell portions and solid compressible filler material therein yield.
4 more elements
A longitudinally yieldable support for supporting a roof in an underground mine, comprising:
- a first support section in the form of a column comprising a first outer shell of steel;
- a second support section in the form of a column comprising a second outer shell of steel, the first and a second support sections being substantially the same in effective diameters and lengths;
- a third support section in the form of a column comprising a third outer shell of steel interposed between and permanently attached to the first and second outer shells, the third outer shell defining at least one pair of apertures, each positioned on opposite sides of the third outer shell;
- at least one air ventilation duct having first and second ends attached to the third outer shell at a location of the at least one pair of apertures, the at least one air ventilation duct transversely extending across the third outer shell between the first pair of apertures;
- and
- a solid compressible filler material substantially filling the first, second and third outer shells and substantially encapsulating the at least one air ventilation duct within the third outer shell;
- the first air ventilation duct having a wall thickness sufficient to prevent the first air ventilation duct from collapsing or yielding as the first and/or second support sections and associated solid compressible filler material yield such that the first air ventilation duct does not collapse or yield to allow a flow of air through the first air ventilation duct as the support yields.
4 more elements
Dependencies are inferred from the claim text.