Fracture Mechanical Behavior of Sandstone Subjected to High-Temperature Treatment and Its Acoustic Emission Characteristics Under Uniaxial Compression Conditions

Sandstone is a common sedimentary rock, used in a broad array of geotechnical engineering applications and present in many coal mines (Tian et al. 2012; Zhu et al. 2016). AE technology can help deepen our understanding of deformation and fracture of rock materials after high-temperature treatment. Because of differences in mineral composition and structure, previous studies have not reported on differences in AE time domain characteristics and the spatial evolution of sandstones. In this work, we studied the differences in physicalmechanical properties and AE characteristics during deformation and fracture of thermally damaged sandstone. Uniaxial compression tests were carried out, while simultaneously monitoring AE signals.