Surveying the extent and size of some natural cave systems
There are two main types of subterranean voids: naturally occurring ones created through geological faulting, landslides and washouts millions of years ago and man-made cavities often created by burst water mains and, particularly, old mine workings.
One such investigation was to determine the extent and size of some natural cave systems on the SW coast of Victoria near Warnambool. The cavities had been created long ago by the natural elements of wind and sea erosion and now are a maternal roost home for a colony of endangered Bats - Southern Bent-wing Bat . The reason Austech was asked to assist in the investigation was to assess how far the cavities extended into the land from the shoreline cliffs and how close did they come to the farmland surface.
Investigation of Sinkhole at Glencore's Mangoola Coal Mine
In both Open cut and underground mines, there is a frequent need to investigate unknown cavities and voids either near the surface or deep underground. The challenge for the mine management is to determine the best way to address this need.
Austech Surveying & Mapping was asked to look into the investigation of a possible sinkhole or cavity close to the workings of an Open cut coal mine for Glencore. The questions that needed answering were how deep did this sinkhole extend, how far and which way did it travel in a lateral direction.