Bottom Sill

These drifts are driven from the shaft or established mining areas to the new ore zone. The drifts are commonly sized to accommodate the large scooptrams used for production mucking.

 

Drawpoints and Climber Nest: Drawpoints can be driven from either footwall or hangingwall, depending on how the ore zone is accessed. The climber nests are always in the hangingwall. The climbers require about 4.3 metres width, 2.7 metres of height and 12 metres of length, though they are often driven longer to accommodate the rescue unit and/or lower dipping orebodies.

 

Top Sill Access: These drifts are also driven from the shaft or existing development but are not always required for the Alimak Mining Method when advanced blasting systems are implemented.