CSIR-CIMFR Roorkee Centre has taken up many projects in past 35-40 years, including the challenging tunnelling projects of national importance through fragile rocks of Himalaya and other parts of India. These projects have helped in developing the approach to estimate the ground conditions likely to be encountered during the tunnel construction including the squeezing ground condition, tunnelling through mixed rock masses having different uniaxial compressive strength, estimation of support pressure, evaluation of supports using the tunnel monitoring and improving the state-of-the-art of tunnel design and safe rock excavation technology. In addition to this, CSIRCIMFR Roorkee Centre has also contributed in the state-of-the-art in the fracture toughness of rocks under sub-zero temperature and physico-mechanical properties of rocks at high temperatures. To highlight the research work, some of projects are briefly discussed in the following paragraphs.