DYNAMIC INFLUENCE CAUSED BY CLOSE BLASTING ON PRIMARY AND SECONDARY SUPPORT SYSTEM IN TUNNEL "SV. ROK"
Journal Title: UNKNOWN - Year 2003, Vol 15, Issue 1
Abstract
At the construction site of the road tunnel Sv. Rok, the second, left tunnels tube is being constructed parallel to the unfinished right tunnel. The part of right tunnel tube is supported with primary support system according to NAMT, the second part is supported complete with concrete. Distance between axes of the tunnel tubes is approximately 35 m. Drifting of the left tube 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 tube. 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.
Authors and Affiliations
Zvonimir Ester Mario Dobrilović Darko Vrkljan
Keywords
Related Articles
- EP ID EP29938
- DOI -
- Views 172
- Downloads 2
PREGLED PROCESA UKAPLJIVANJA PRIRODNOG PLINA
Prirodni plin se od izvora do potrošača najčešće transportira visokotlačnim plinovodima. Kada je udaljenost između mjesta proizvodnje i potrošnje veća od 4000 km, a i zbog diversifikacije dobavnih pravaca prirodnog plina...
NUMERIČKO MODELIRANJE DISKONTINUIRANOG STIJENSKOG MATERIJALA U ELASTIČNOM PODRUČJU
Konstitutivni odnosi stijenskih materijala predstavljaju važnu komponentu u numeričkom modeliranju. Zbog kompleksne prirode stijenskih materijala nije moguće izabrati opće prihvatljiv konstitutivni zakon. Ispitane su mog...
POTOMCI RUDARA IZ XVII. STOLJEĆA IZ RUDA KOD SAMOBORA U HRVATSKOJ
Poznato je da su u rudniku bakra u Rudama kod Samobora rudarile mnoge njemačke obitelji od kojih su još neke u šesnaestom stoljeću imigrirale u Hrvatsku i tu se kroatizirale. Kako su se mijenjali vlasnici samoborskog gra...
PRESSURE BUILD-UP TEST ANALYSIS OF THE RESERVOIR SYSTEM WITH THE MULTIPHASE FLOW
The present work focuses on the determination of absolute permeability in an oil reservoir whose pressure is under the bubble point. The simulation of the reservoir and well with the simultaneous flow of oil and gas is p...
QUARRY STABILITY ANALYSIS FOR COMPLEX SLIP SURFACES USING THE MATHSLOPE METHOD
Due to the specifc characteristics of rock mass compared to other geological materials, the calculation of rock slope stability is very complex. One of the basic characteristics of rock masses is discontinuity, which,...