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- W31409271 abstract "This report describes the development of a yielding steel post for underground mine support. The report covers concept development, laboratory tests, modifications, and field evaluations. The objective of this work was to develop a stiff support member capable of both supporting high loads and yielding when excessive amounts of mine entry closure were present. The 6- to 7-ft steel post was designed to yield three-piece unit consisting of top and bottom telescoping legs and a separate foot bracket. It develops its load-carrying characteristics when the lower pipe, with an attached interference ring, is forced into the larger top pipe. Laboratory tests were used to determine critical loads and post performance for various post lengths. Field tests showed that the posts could perform in actual mining conditions. The post has the ability to provide support in highly yielding ground and also, because of its slender profile, enhance ventilation and provide more area for travelways and escapeways. The design is simple enough to allow for fabrication at most mine shop facilities." @default.
- W31409271 created "2016-06-24" @default.
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- W31409271 date "1989-01-01" @default.
- W31409271 modified "2023-09-27" @default.
- W31409271 title "Yielding steel posts" @default.
- W31409271 hasPublicationYear "1989" @default.
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