South Crofty Mine Roskear Shaft Surface: These images were taken in 1997 when I was lucky enough to have a tour of the facility. The shaft was renovated during the 1990’s in oder to replace the secondary egress at Robinson’s Shaft.
Robinson’s Shaft was finally decommissioned during 1996, the changeover was completed on the 17th June that year.
When the Dolcoath and Roskear lodes began to be exploited Roskear became a major (updraught) ventilation shaft with large fans at the collar. But many local people will remember the plume of warm moist air that rose above the shaft in Winter. This was visible for miles.
Thanks go to Keith Russ for the information on Mine Ventilation.
During the last working years of the mine, Roskear Shaft was upcast as was Taylors, only Cooks and Robinsons Shafts were downcast. The Ventilation Department had several tasks.
The velocity and quantity of air were measured at fixed points throughout the mine. A vane anemometer was used to measure the flow, the temperature both dry and wet bulb were also measured too. Again the radon was measured at fixed locations at regular intervals maybe once a month.
It was usual for the ventilation dept, to measure both airflow and radon at the same time. Much effort was spent in tracing the flow of air round the mine, especially in connection with old workings which were a source of radon, and leakage of air.
The next images were taken in the winder house. This held two winders, the primary Mary Anne Winder was purchased secondhand from Wheal Jane Mine. It was built by M B Wild during the early 1980’s. The second winder was used to hoist materials in the shaft.
The remaining images on this page were taken at the top of the shaft. Miners were preparing to go underground to conduct an inspection of the adits.
Present day 2016, there is very little left now of the Roskear Shaft Surface facility. Sadly the winders and headframe have all been removed. The winder house has gone, all that remains are the concrete foundations also the closed shaft.
The area is extremely dangerous and should not be entered.