发明名称 |
YIELDABLE SUPPORT PROP AND METHOD |
摘要 |
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. |
申请公布号 |
ZA201208031(B) |
申请公布日期 |
2013.09.25 |
申请号 |
ZA20120008031 |
申请日期 |
2012.10.24 |
申请人 |
STRATA PRODUCTS WORLDWIDE LLC |
发明人 |
MCCARTNEY CLIFFORD A;O'DONNELL THOMAS P |
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