Effect of Open-Fire-Induced Damage on Brazilian Tensile Strength and Microstructure of Granite

Deformation and stability of surrounding rock of a tunnel could be significantly affected by the fire accident-induced open-fire damage. In this study, the influence of open-fire damage on the P-wave velocity, Brazilian tensile strength (BTS), and the associated microstructure evolution of granite is investigated. The open-fire damage is generated by heating the rock sample with charcoal fire for 3 h prior to the subsequent tests. P-wave...