The use of high-resolution geophysical exploration systems, developed by the HGZ Helmholtz Centre for Geosciences, for underground applications at tunneling and within boreholes requires a high demand due to safety and operational reliability. The GFZ-Underground-Lab in the research and education mine “Reiche Zeche” in Freiberg offers the possibility to run series of experiments to develop underground applications. For the known geological background, market-ready systems can be realized.

Surrounded by three galleries the test site comprises a block of homogeneous high-grade gneiss of almost 50 m width and 200 m length ensuring constant environmental conditions. Along the galleries over thirty 3-component one and two-meter-long, geophone anchors are installed at a distance of 4-9 m from each other. Two horizontal 8 ½" boreholes of 20 and 30 meters were drilled into the test site. In 2011 the GFZ-Underground-Lab was extended by a chamber 10 m above the galleries. From up there a 70 m 8 ½" vertical borehole was drilled through the gneiss block. All boreholes are open and completely cored. The GFZ-Underground-Lab is completed by a heated workshop with power, telephone and internet connection and seating-accommodations for up to 6 persons. The laboratory is in a large part accessible by rail vehicles. Furthermore, excellent labor conditions are ensured by the good collaboration with the staff of the research and education mine “Reiche Zeche”.