The influences of heating and uniaxial loading on granite subjected to liquid nitrogen cooling

Understanding and controlling rock breaking is critical in many geological projects, such as mining, tunneling and other underground engineering projects. Tunnel boring machine (TBM) is widely used in such geological projects owing to its security and better working environment. However, it is difficult in tunneling hard rock which would reduce the life of cutters. In this paper, an auxiliary method, heating followed by sharply cooling, is used...