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US 11,136,887 B2Granted
Mine roof support, pre-installation assembly for same, and method of installation
AssigneeBurrell Mining Products, Inc.
InventorDon C. Abel
Life of this patent
Estimating the term…
Abstract
A mine roof support comprises two or more frusto-conical, tubular sections, the sections each flared outwardly from an upper end to a lower end thereof, a skirt portion of a section being received and secured within a neck portion of a section below in a frictional fit to define a continuous, interior volume of the mine roof support. A continuous, solid, compressible, load-bearing material is located within the interior volume. An uppermost section is closed at an upper end thereof, and a lowermost section is closed at a lower end thereof. Methods of installing a mine roof support and a pre-installation assembly for a mine roof support are also disclosed.
Claims32
A mine roof support, comprising:
- two or more frusto-conical, tubular sections, the sections each flared outwardly from an upper end to a lower end thereof, an entire exterior circumference of a longitudinally extending skirt portion of a section being received and secured within an entire interior circumference of a longitudinally extending neck portion of a section below in a frictional fit providing a substantially fluid-tight seal between sections to define a continuous interior volume of the mine roof support, wherein an uppermost section of the two or more frusto-conical sections comprises a cap continuously secured at a perimeter thereof to an upper end of the uppermost section and closing the uppermost section proximate an upper end thereof, and a lowermost section of the two or more sections comprises a floor continuously secured at a perimeter thereof of a lower end of the lowermost section and closing the lowermost section proximate the lower end;
- and
- a continuous, solid, compressible, load-bearing material located within the continuous interior volume and in direct contact with interior surfaces of the cap, the sections and the floor.
A method of installing a mine roof support, comprising:
- placing a mine roof support comprising an assembly of at least two sections in an installation location within a room of an underground mine, each of the at least two sections of frusto-conical configuration and flared outwardly from an upper end to a lower end thereof, at least one of the at least two sections being nested within at least one other of two or more sections, an outermost section of the at least two sections having a floor continuously secured at a perimeter thereof to the outermost section and closing the outermost section proximate a lower end thereof and an innermost section of the at least two sections having a cap continuously secured at a perimeter thereof to the innermost section and closing the innermost section proximate an upper end thereof;
- and
- introducing a flowable filler material precursor of a solid, compressible, load-bearing material directly into an interior of the assembly under pressure to contact inner surfaces of the cap, the sections and the floor and cause an innermost section of the at least two sections to move upwardly in a telescoping manner within a next adjacent section until an entire exterior circumference of a longitudinally extending outer wall surface of the lower end of the innermost section contacts and frictionally engages with an entire exterior circumference of a longitudinally extending inner wall surface of the upper end of the next adjacent section to secure the innermost section to the next adjacent section and effect a substantially fluid-tight seal therebetween.
A pre-installation assembly for a mine roof support, comprising:
- multiple, tubular, frusto-conical sections in a nested arrangement;
- a skirt portion of each section defining a larger diameter than a neck portion of a next outer adjacent section, each section being flared outwardly from an upper end to a lower end thereof at substantially the same angle α of departure to a longitudinal axis of the section;
- the frusto-conical sections each having a longitudinally extending lower end portion having an entire exterior circumference configured to be captured and frictionally engaged within an entire exterior circumference of a longitudinally extending upper end portion of any next outwardly adjacent frusto-conical section;
- an innermost frusto-conical section having a cap welded at a perimeter thereof to an upper end of the innermost frusto-conical section and closing the innermost frusto-conical section proximate an upper end thereof;
- and
- an outermost frusto-conical section having a floor welded at a perimeter thereof to a lower end of the outermost frusto-conical section and closing the outermost frusto-conical section proximate a lower end thereof.
3 more elements
Dependencies are inferred from the claim text.