Scale Effect on Hydraulic Properties of Pore-Fissure Deep Rock Formations and Its Importance for the Mining Shaft-Sinking Process

The problem of hydraulic parameters estimation lies in the depth: deeper rock formation, more expensive and difficult field tests samples acquisition, challenging technical issues. article assesses Triassic sandstone’s drainage potential at stage shaft sinking. It focuses on parameter analysis varied scales, from drill-core sample laboratory testing, through a single well drawing test, to long-term pumping recovery with observation piezometers. obtained results are compared values estimated past using different methods. Finally, paper states whether it is reliable forecast pore-fissure sandstone based only core samples’ tests. This research proved that lab underestimate rocks’ (mean conductivity k = 9.79 × 10−8 m/s) tenfold than 4.45 10−7 m/s). However, can be concluded group so-called “witness samples”, 10% all top value tested laboratory, representative aquifer comparable With this mind, we recommend highest hydrogeological worst-case scenario. Therefore, possible inflows shafts reliably. methodology recommended for rocks porous character.