Exploration by 9 engineering-geological and 5 hydrogeological core holes with total drilling depth 300m drilled by core bit HVS 482 and ADBS.
Hydrogeological core holes are cased by perforated PVC case DN 125 mm with screwed joint; hole annular areas filling by sorted gravel 1,4/4 mm grade; cement-bentonite seal on the top part of hole. Engineering-geological holes with 275/220/175 mm dimeter cased by PVC case DN 125 mm with screwed joint and mudpan, annular space filling by sorted gravel of 1,6 – 4 mm grade; bentonite seal on the top part of hole.
09/ 2017
