Underground geophysics

The use of geophysical methods is indispensable for safety issues in mining and for geological exploration prior to mining work.
In the BGR, acoustic and electromagnetic methods are used underground, particularly in the area of research activities on the subject of radioactive waste repositories. Seismic and geoelectric measurements are used to map loosening zones in the experimental mines at Mol and Mont Terri (sites in clay rock formation).

Geoelectric measurements in the Mont Terri test mine

In the salt rock formation at the Asse II mine and Morsleben repository, due to the low rock conductivity and the associated high penetration depth, the georadar method is well suited for non-destructive gain of knowledge about the complex structures in the salt dome.
In mines, microacoustic measurements are also used to localize stress zones in the mountains.
In addition to the visible outcrops and boreholes, the results of the geophysical measurements provide the basis for creating a spatial geological model underground.