ABSTRACT
Today, tunneling across the globe has become a one-stop solution to speed up mobility and connectivity between locations, and also interestingly this can be achieved without damaging our environment by maintaining the proper green cover. But, making a tunnel is not easy as it seems to be because rock is a material that is unknown to us, unlike concrete. The failure of the tunnel may arise because of the squeezing rock condition, rock bursting condition, and also because of the insufficient support system provided. So, in this paper, detailed case studies of several tunnels have been done and the reasons for their failure have been in detail analyzed. Finally, a guideline regarding the support and the necessary investigation, and the tunnel profile have been made that would be helpful in the construction of the tunnels.
