Damage Constitutive and Failure Prediction of Artificial Single-Joint Sandstone Based on Acoustic Emission

The effect law of deformation and failure a jointed rock mass is essential for underground engineering safety stability evaluation. In order to study the evolution mechanism precursory characteristics instability masses, uniaxial compression acoustic emission (AE) tests are conducted on sandstones with different joint dip angles. To simulate mechanical behavior rock, damage constitutive model AE characteristic parameters created based mechanics theory taking into account structure load coupling. quantify instability, cusp catastrophe theory. results indicate that when angle increases from 0° 90°, sandstone shifts tensile shear, 45° being critical mode. Sandstone's compressive strength reduces initially subsequently increases, resulting in U-shaped distribution. developed model's theoretical curve closely matches test curve, indicating can reasonably describe sandstone. has high forecast accuracy, combined model, prediction accuracy be increased further. research provide guidance evaluation engineering.