5 pcs. Exploration drilling using dry and air-lift drilling methods, expansion of measuring points using DN 80 plastic for seismic control investigations and dismantling of all measuring points.

Drilling of 5 exploration boreholes using dry and air-lift drilling methods. In the area of ​​the rubble layers, the borehole was sunk using the dry drilling method and piped up to 12.90 m below GOK with 419 mm Ø drill pipes and up to 36 m below GOK with 13 3/4″ drill pipes. The borehole was sunk to a depth of 191 m using the air-lift drilling method, expanded with DN 80 solid PVC pipes and grouted with a clay powder-cement suspension. After seismic control measurements were carried out, all measuring points were dismantled.