Yieldable support prop and method
AssigneeStrata Products Worldwide, LLC
InventorsClifford A. McCartney, Thomas P. O'Donnell
Life of this patent
Estimating the term…
Abstract
A yield support prop for a mine includes a first metal tube extending from the mine floor having a first portion having a first outside diameter and a second portion having a second outside diameter. The prop includes a second metal tube that is disposed about the first portion and extends toward the mine roof, when the second tube receives a load from the mine roof, the second portion deforms the second tube and expands the second tube creating resistance against the load from the mine roof. A method for supporting a mine roof. A method for building a yieldable mine prop.
Claims22
A yield support prop for a mine comprising:
- a first metal tube extending from the mine floor having a first portion having a first outside diameter and a second portion having a second outside diameter;
- and
- a second metal tube that is disposed about the first portion and extends toward the mine roof, when the second tube receives a load from the mine roof, the second portion deforms the second tube and expands the second tube creating resistance against the load from the mine roof.
A method for supporting a mine roof comprising the steps of:
- placing a yieldable mine prop in the mine so a first metal tube of the prop extends from the mine floor and a second metal tube of the prop extends from the first tube toward the mine roof;
- receiving a load from the mine roof by the second tube;
- and
- moving the second tube under the load against resistance from a second portion of the first tube that extends from a first portion of the first tube that deforms the second tube.
A method for building a yieldable mine prop comprising the steps of:
- fitting a bottom end of a second metal tube over a top end of a first metal tube;
- and
- moving the bottom end of the second tube against a second portion of the first tube which extends from a first portion of the first tube.
Dependencies are inferred from the claim text.