Faculty of Mining, Geology and Petroleum Engineering University of Zagreb
Abstract
The parameters of drilling and blasting procedures during excavation of Grič and mala Kapela Tunnels are presented in this work. The tunnels are being constructed according to NATM (New Austrian Tunneling Method) in two parallel tubes. By Comparison of blasting with patroned and pumped explosives and electric and non-electric mode of initiation, optimal technological parameters have been defined concerning duration of blasting working cycle, progress, tunnel category and seismic effects of blasting on the tunnel support system of the parallel tunnel tube.U radu su prikazani parametri bušenja i miniranja tijekom iskopa tunela Grič i Mala Kapela. Tuneli se izvode Novom austrijskom tunelskom metodom s dvije paralelne cijevi. Uspoređujući miniranje s patroniranim i pumpanim eksplozivom i s električnim i neelektričnim načinom iniciranja, definiraju se optimalni tehnološki parametri s obzirom na vremensko trajanje radnog ciklusa miniranja, napredovanja, tunelske kategorije i seizmičkog utjecaja miniranja na tunelsku podgradu paralelne tunelske cijevi
