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US20100303553 Fastening element for use in mining and tunnel construction  
A fastening element for use in mining a tunnel construction, has a base body (12; 32; 42); and a plurality of weakenings (14, 15; 34, 35; 44, 45; 54) provided on an outer surface (13; 33; 43; 53)...
US20100028088 BREAKABLE ROCK BOLT  
A rock bolt is disclosed, which includes first and second ends, a shaft extending between the ends, the shaft incorporating a hollow metal rod including at least one breaking zone and wherein the...
US20110135402 ROCK ANCHOR CABLE  
A rock anchor (10) which includes a cable (12) with a hollow core, an expansion mechanism (20) at one end of the cable, a tube (14), which acts on a load washer (16), in which part of the cable is...
US20150267537 ROCK ANCHORING SYSTEM AND METHOD  
This invention discloses an underground rock anchoring system comprising a rock bolt having a bolt shaft operatively locatable in an elongate rectilinear hole drilled into a hanging wall such that...
Matches 1 - 4 out of 4