Mine support post

The mine post of claim i wherein said innermost and outermost post lengths have cooperative non-cylindrical cross-sections.

The mine post of claim wherein said means comprises a separate part constituting a frictional, pressure bubble generator means for generating controlled resistance to contractive movement as to said innermost and outermost tubular post lengths.

An adjustable, axially revolvable, yieldable mine post having a central axis of revolvement and including, in combination, first and second, mutually telescoping, tubular post lengths each having an outermost end, said tubular post lengths comprising innermost and outermost tubular post lengths, said outermost end of said first tubular post length having a first transverse bearing member, said outermost end of said second tubular post length having a fixed, internally threaded end portion and being provided with an adjustable, threaded, extensible portion cooperatively threaded into said threaded end portion and provided with a second transverse bearing member, said tubular post lengths being conjointly provided with tubular means having a nominally-undersized, transverse, leading-edge peripheral dimension and being principally, transversely- peripherally oversized relative to the transverse interior dimension of said outermost post length and disposed medially within said outermost post length in an interference-fit relationship, whereby to provide controlled resistance to relative movement between said post lengths upon compression loading of said mine post.

An adjustable, axially revolvable, yieldable mine post having a central axis of revolvement and including, in combination, first and second, mutually telescoping, tubular post lengths each having an outermost end, said tubular post lengths comprising innermost and outermost tubular post lengths, said outermost end of said first tubular post length having a first transverse bearing member, said outermost end of said second tubular post length having a fixed, internally threaded end portion and being provided with an adjustable, threaded, extensible portion cooperatively threaded into said threaded end portion and provided with a second transverse bearing member, separate means, nominally peripherally oversized relative to the transverse interior dimension of said outermost post length, disposed at a location within said outermost tubular post length in an interference fit and abutting said innermost post length, whereby to provide controlled resistance to relative movement between said post lengths upon compression loading of said mine post.

A mine post constructed for mine placement in response to in situ revolvement thereof, said mine post including, in combination, an inner, upper, tubular post length provided with an upper end bearing plate having an upwardly extending, axial pivot protuberance;

• an outer, lower, tubular post length telescopingly cooperating with said inner post length and provided with an internally threaded lower end;
• a lower bearing plate provided with downwardly extending, off-axis, gripping protuberances and also an upstanding, axial threaded shaft threaded into said threaded lower end and adjustable for elongation therein;
• and a friction bubble generator member pre-installed within said outer tubular member and dimensioned for an interference fit therewith, said generator member being installed in an intermediate location prepared for frictional movement upon axial post compression-loading and engaging said inner tubular member in potentially thrusting relation, whereby incremental load-produced contraction of said post produces a thrusting of said inner tubular member against said generator member whereby to progressively frictionally advance said generator member within said outer tubular post length.