A Continuous loader called Haggloader 7HR
is deployed in Rishikesh Karanprayag Railway Tunnel
Project Pkg-02 for safe and optimal loading of muck
from the blast face. To counter growing operational cost
and inefficiency of tunnelling construction, continuous
loader seems to be a game changer for muck loading for
smaller diameter tunnels. Muck loading is a cyclic
process where an average quantity of 60 to 90 m3
of muck
is being generated after every blast operation. Due to
the rotation constraints of normal excavator in smaller
diameter tunnels, continuous loaders seem to be the best
option available.
This paper describes the background of project
execution with detailed roadmap and excavation process
employed for space development. the major issue arises
while deploying continuous loader is the approachable
height of loading, on the ground facts describes the issue
where haulage approach is out of reach. Haggloader
reaches on 1/3rd of the total height of haul from the base.
Approachable loading height is always an issue when it
comes to loading. It was also observed in case of
Continuous loader conveyor that the total approachable
height of conveyor from the base of haulage was around
1 feet. Due to which loading capacity was deeply
affected. To counter the same Riggers has been
implemented at the rear end which lifts the Continuous
loader 1 feet from the ground, in turn lifts conveyor 3
feet from the base of the Haul is the state of an art. A
complete set of data on monthly basis before and after
implementation has been recorded to map the muck
loading capacity of Continuous loader. On the basis of
regression analysis total improvised efficiency of
Continuous loader after Rigger implementation with
excellent correlation factor R2= 0.9987 and R
2=0.7133
before implementation was recorded. Production per
unit time has also been described in this paper. The
improvisation with recorded data has the potential to
rapidly improve loading capacity of continuous loader.
Keywords :
Continuous loader, Rigger, Excavation, NATM, continuous loading, Parametric Analysis.
