Influence of Hydrogeological Investigation’s Accuracy on Technology of Shaft Sinking and Design of Shaft Lining—Case Study from Southern Poland

Accuracy of hydrogeological and geotechnical investigation in place shaft sinking is a key factor for selection method design the lining. The following work presents influence rising level accuracy geological data gathered area Silesian Coal Basin technical projects lining technology its sinking, which have been changing over years. initial project was repeatedly modified. Each modification eventuated requirements lining, such as increasing thickness or concrete class. It has become necessary to use additional methods reinforcing rock mass around shaft.