SPECIALIST EQUIPMENT
Full encapsulation of the rock bolt means that loads will be evenly distributed and the bolt will be protected from corrosion
DEEPER MINES, NEW SOLUTIONS
Thanks to advances in materials technology, mines are beginning to reap the benefits of pumpable resins for rock support, says Uwe Wyink
A
lthough pumpable resins for rock bolting and cable bolting have been introduced only recently, they are already making a big
impact. One mine operator reports that it is cutting months from its development schedule, allowing production to start earlier.
As mines operate in deeper levels, with
higher rock stresses affecting the stability of the strata, rock reinforcement becomes more challenging. Pumpable resin, with
rock or cable bolts, offers significant benefits over traditional bolt fixing methods, saving time and reducing the risks of bolt failures during their expected lifetime.
DEEP DIFFICULTIES Traditional solutions for long-term rock reinforcement, such as standing support, sprayed concrete and mechanical or cementitious grouted rock bolts sometimes have drawbacks for deep
mining operations. Tey can be difficult to install, especially in poor ground. Tis leads to quality concerns and longer installation times, creating bottlenecks in mining operations. Rock bolts grouted with polyester
cartridges have become popular, because they offer a faster installation time than traditional methods, but in unstable ground this system has its challenges too. Because the cartridge must go into the borehole first, before the bolt is rotated
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