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====Grouted bolts==== *'''Resin grouted rebar''' is used in areas which require more support than a point anchor bolt can give. The [[rebar]] used is of similar size as a point anchor bolt but does not have an expansion shell. Once the hole for the rebar is drilled, cartridges of [[polyester resin]] are installed in the hole. The rebar bolt is installed after the resin and spun by the installation drill. This opens the resin cartridge and mixes it. Once the resin hardens, the drill spinning tightens the rebar bolt holding the rock together. Resin grouted rebar is considered a permanent ground support with a lifespan of 20β30 years.<ref name="Underground Drilling and Loading Handbook 4.0"/> *'''Cable bolts''' are used to bind large masses of rock in the hanging wall and around large excavations. Cable bolts are much larger than standard rock bolts and rebar, usually between 6 and 25 metres long. Cable bolts are grouted with a cement grout.<ref name="Underground Drilling and Loading Handbook 4.0"/>
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