Resin injection apparatus for drilling apparatus for installing a ground anchor

A resin injection apparatus for use in connection with a drilling apparatus for installing ground anchors, the injection apparatus comprising:

• a fluid injector, adapted to be connected in fluid communication with a hollow drill shaft of the drilling apparatus, for injecting one or more resin fluids into the drill shaft, the fluid injector comprising a rotatable engaging means for rotatably engaging with the drill shaft whereby, in use, when a hole has been drilled in a rock strata, resin can be injected into the hole via the drill shaft prior to inserting a ground anchor,
• the rotatable engaging means comprising first and second sealed bearings which provide a fluid-tight seal between an outer surface of the drill shaft and an interior of the rotatable engaging means, and further comprising an outer housing enclosing a mixing chamber within the interior of the rotatable engaging means wherein, in use, the fluid injector remains stationary while the drill shaft rotates.