A rock bolt anchor having concurrent chemical and mechanical...
A rock bolt and an anchoring device
A rock bolt and method of installing a rock bolt
A rock bolt assembly
A rock stabilizing apparatus
A self centering cable bolt
A tensioning device
A tunnel waterproofing construction method
A tunnel waterproofing method
A versatile grout bag type of underground support
A yielding rock bolt
A yielding rock bolt
Adapter for a self-drilling, chemically anchorable fastening...
Adhesive anchor
Adjustable bucket for an earth boring machine
Adjustable height mine roadway support stilt
Advance of pipe elements in the ground
Advancing device for boring sections of roadway, tunnels or...
Advancing support device for coal and ore extraction works
An anchor bolt assembly