DBPapers

COMPARISON OF MACHINE UTILIZATION TIME AND PERFORMANCE FOR ROADHEADER AND IMPACT HAMMER IN KADIKOY-KARTAL METRO TUNNELS (ISTANBUL)

AUTHOR/S: I. OCAK
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 1, 269-276 pp

ABSTRACT

Drilling and blasting is the oldest excavation method in mining and tunnelling
applications especially in hard rock conditions. But in recent year, the application of
roadheaders and impact hammers in hard rock conditions has increased considerably in
both civil and mining engineering fields. The prediction of machine utilization time and
determining performance plays an important role in the time scheduling of the
tunnelling projects.

The tunnels of the Kadikoy-Kartal Metro are under construction. This paper summarizes
the construction methods of the Kadikoy-Kartal Metro tunnels and the performance of
the roadheader and impact hammer. At the same time, machine utilization time was
compared for roadheader and impact hammer for Kozyatagi Station. Average uniaxial
compressive strength (UCS) for roadheader (402 HP) 132 MPa, for impact hammer
(143 HP) 58.3 MPa. UCS was obtained from daily face blocks in laboratory.

The result of this study show that machine utilization time for roadheader 28.2 % and
for impact hammers 13.7 %.

Keywords: Tunnel excavation; excavation performance, machine utilization time.