L44 Shaft is a major upcast ventilation shalt in the hanging wall of the 1100 Orebody._x000D_
Various techniques for stripping a raisebored pilot hole were combined to produce L44 shaft. From the surface to 198 m depth, the shaft was concrete lined 7.3 m internal diameter. Below this the shaft was developed to 7.6 m diameter unlined. 11 level, 540 m below the surface, was the first readily accessible level connection._x000D_
The section to 198 m depth was benched and concrete lined through weak oxidised ground._x000D_
When more competent ground was encountered the operation was converted to horadiam stripping. This application of the raiseborer has led to a safer, more efficient method of shaft development.