|The Phantom S900 UAV used by GSNI.|
Parkmore mines are located just north of Cargan at the top of Glenariff, Co. Antrim and were worked for their iron and bauxite. Iron ore and bauxite were extracted from the Palaeogene interbasaltic formation, a layer of reddish-brown 'lithomarge', rich in clay, iron and aluminium oxides that developed from weathering of the underlying basalt. The area is one of extensive mining with the nearby Glenravel mines extracting the material and transporting it by narrow gauge railway lines to Waterfoot on the coast where it was shipped to market. The historic bridge, railway line and associated buildings are still evident on the landscape.
|Aerial view of the Glenravel mines area.|
Due to the number of adits and air shafts within the area as well as the rough terrain, surveying the land can be time consuming and hazardous. But GSNI's acquisition of an unmanned aerial vehicle (UAV) has meant that we can now use this to survey the area remotely with live aerial imagery fed back to a monitor at the base station. This method has proved so effective that during scheduled monitoring, two new collapses were identified within minutes of the survey; one was in an area that had undergone collapses previously with a retreating collapse of ground following the mine pathway, the other was in an area with no known previous collapse.
|One of the mine collapses identified by the UAV. |
The depression is approximately 10m wide.
For more information on some of the other innovative techniques used by GSNI to monitor and assess abandoned mines then click here.