Case study · Sasol · South Africa
Sasol raise-bore vent shafts
Support, lining and equipping of raise-bored ventilation shafts at Sasol’s Sigma and Matla collieries — from winder house to commissioning. Completed LTI free.
The project
Turning a raise-bored hole into a working shaft
A raise-bored hole is only the start of a ventilation shaft. At Sasol’s Sigma and Matla collieries, ShaftCon supported, lined and equipped the raise-bored vent shafts, and fitted them with travelling ways and second escape ways. The client on the project was Sasol Coal Mine, together with Master Drilling.
The job ran from surface to shaft bottom. We erected the winder house and installed the winder, pre-assembled the equipping stage, bank steel, bank doors and headgear, then lined the shaft with wet-crete and installed a ring-back cat ladder. The final step was commissioning the headgear, winder and equipping stage.
Both the Sigma and the Matla projects were completed LTI free.
- Client
- Sasol Coal Mine and Master Drilling
- Sites
- Sigma and Matla collieries, South Africa
- Work
- Support, lining and equipping of raise-bored vent shafts; travelling ways and second escape ways
- Safety
- Sigma and Matla projects completed LTI free
Scope of work
Winder house and winder
Erection of the winder house and installation of the winder that serves the equipping stage.
Stage, bank steel and headgear
Pre-assembly of the equipping stage, bank steel, bank doors and headgear for the support and lining of the vent shaft.
Support and wet-crete lining
Support of the raise-bored hole and a wet-crete lining applied from the stage.
Ring-back cat ladder
Installation of a ring-back cat ladder in the lined shaft.
Travelling and escape ways
Travelling ways and second escape ways, so the shafts serve as a way out as well as an airway.
Commissioning
Commissioning of the headgear, winder and equipping stage before handover.
From surface to shaft
Safety
Completed LTI free
The company profile records that the Sigma and Matla projects were both completed without a lost-time injury.
Project photographs
Related
Sinking, support and lining of vent and hydro shafts.
Winder houses, winders, headgear and stages.
ShaftCon Raise Boring (Atlantis).
Planning a shaft, decline or tunnel?
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