Iii tunnel support systems cannot be accomplished by

iii. Tunnel support systems cannot be accomplished by sticking only to one approach.
Tunnel support stability is not only an engineering concept but also a safety issue and
hence that needs to be earnestly investigated. In so doing, catastrophes during tunnel
construction process can be minimized as much as possible.
Conclusion
This paper has looked into the general principles of exploration of tunnel boring machines and
general considerations of tunnel construction . Cutter heads are the major determinants of the
power of a TBM. For the success of tunnel construction, the stability of the surrounding rock
mass during the construction process has been especially highlighted. The study also looked at
the geotechnical factors that would influence the tunnel support stability . Tunnel stability is a
very important aspect to consider during a tunnel construction project. The stability of a tunn el is
majorly influenced by loads on the roof of the tunnel , in the side walls and in the underground of
the background .

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