Roof bolts for use in mines, a method for their production...

Roof support frame

Roof support of underground mines and openings

Roof support of underground mines and openings

Roof support pin

Roof support system for a mine and the method and tooling...

Roof supports

Roof truss sling

Rotary cutter type excavator and method for excavation

Rotary driven rock cutting equipment

Rotary tool, tool assembly and process

Sand stabilization in selected formations

Scrubber squeegee apparatus

Sealing

Sealing methods for mine or tunnel roof anchoring bolts

Segmented earth boring drill bit

Self drilling rock bolt

Self drilling rock bolt

Self propelled mine roof supports

Self-drilling anchor dowel