Rock bolts are one of the most commonly used reinforcement elements used in underground mines, tunnels, slope stabilization and other forms of ground support.
There are different categories of rock bolt. Rock bolt does not refer to just one product.
The various bolt types use different methods of anchoring to the ground, are made of different materials and may be installed differently. Just because a certain bolt works well in a specific situation, does not mean it will be the best choice for all underground excavations. A bolt that works well in a fairly competent mine roof may not be the best choice for fractured ground, highly deformable rock or in an excavation where full column grouting is required.
Different rock bolt types discussed here include resin bolts, mechanical bolts, friction bolts, fully grouted bolts, threaded steel bolts, hollow grouting anchors, and FRP rock bolts.
Selecting which type of bolt to use depends on the geology of the project, the required support load capacity, condition of the borehole, equipment available to install the bolts, corrosion conditions and the desired service life of the installed bolt.
To learn more about ground support used in mines and tunnels and how mesh, plates and steel supports work in conjunction with rock bolts, read Wanfeng's introduction to ground support for underground excavations.
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