Naslov
Dynamic influence of blastig on primary and secondary tunnel support system

Autori
Ester, Zvonimir ; Dobrilović, Mario ; Vrkljan, Darko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 2nd World Conference on Explosives & Blasting Technique / Holmberg, R. - Prag : A.A. Balkema Publishers, 2003, 527-531

Skup
2nd World Conference on Explosives & Blasting Technique

Mjesto i datum
Prag, Češka Republika, 10.09.2003. - 12.09.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
tunnel pipes

Sažetak
At the construction site of the road tunnel Sv. Rok, the second, left tunnels pipe is being constructed parallel to the unfinished right tunnel. The part of right tunnel pipe is supported with primary support system according to NAMT, the second part is supported complete with concrete. Distance between axes of the tunnel pipes is approximately 35 m. Drifting of the left pipe is being done by blasting. A potential problem of damaging the surrounding rock and support system was recognized. It is well known that the ground vibration particle velocity due to a blast is a measure of damage on the nearby construction. The three component seismographs were used to measure ground oscillation velocities in the right tunnel pipe. Total of 30 measurements were executed and 720 values were processed (including all three component oscillation velocities). Maximum ground oscillation velocity recorded was 232.061 mm/s. This paper brings conclusion derived from monitoring data achieved at close proximity to the blasting area, damage level criteria for the rock mass and support system and discusses how these results could assist further development in the control of blasting technique.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA