MONITORING OF COAL MINING SUBSIDENCE BY HRSC-A DATA

Active deep hard coal mining in the Ruhrgebiet with significant subsidence movements leads to the development of large shallow basins on the ground surface. Due to legal requirements the German Coal Mining Company “Deutsche Steinkohle AG” (DSK) is obliged to make a prognosis and to forecast influences caused by current excavations. Important data needed are “Digital Terrain Models” (DTM), displacement maps, information on biotopes and the actual land-cover. The dynamic mining activities demand the updating of spatial information at regular times. Today these data are generated by methods of analytic photogrammetry and by manual fieldwork. With regard to effectiveness and economy DSK started to evaluate new methods of data acquisition and data processing by using digital photogrammetry and remote sensing techniques.