Mine roof support, pre-installation assembly for same, and method of installation
AssigneeBurrell Mining Products, Inc.
InventorsDon C. Abel, Nicholas J. Tennant
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 an interior volume of the mine roof support. A solid, compressible, load-bearing material is located within the volume. Methods of installing a mine roof support and a pre-installation assembly for a mine roof support are also disclosed.
Claims25
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, a skirt portion of a wall above a lower end of a section being received and secured within a neck portion of a wall below an upper end of a section below in a frictional fit between an outer surface of the wall above the lower end of the skirt portion section and an inner surface of the neck portion of the wall of the section below, providing a substantially fluid-tight seal between the section and the section below, the two or more frusto-conical tubular sections defining an interior volume of the mine roof support;
- and
- a solid, compressible, load-bearing material located within the interior volume.
A method of installing a mine roof support, comprising:
- placing a mine roof support comprising at least two sections in an installation location on a floor within a room of an underground mine, each of the at least two sections having a frusto-conical configuration and being 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 the at least two sections;
- pulling an innermost section of the at least two sections upwardly within a next adjacent section until an outer surface above the lower end of a section contacts and frictionally engages with an inner surface below the upper end of the next lower, adjacent section to secure the innermost section to the next adjacent section with a substantially fluid-tight seal between the at least two sections to define an interior volume of the mine roof support.
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, wherein each section is flared outwardly from an upper end to a lower end thereof at substantially a same angle α of departure to a longitudinal axis of the section to enable at least one wall surface proximate an end of each section to frictionally engage a wall surface proximate an end of at least one other section and form a substantially fluid-tight seal between adjacent sections upon longitudinal extension of the multiple tubular, frusto-conical sections in a telescoping manner.
Dependencies are inferred from the claim text.