Intelligent identification of acoustic emission Kaiser effect points and its application in efficiently acquiring in-situ stress

• The PSR–GA–SVM model achieves 94.37% accuracy in identifying AE Kaiser points, outperforming traditional methods. • The proposed PPPGS method provides a more accurate and efficient alternative for in-situ stress measurement. • Fractal dimension from phase space reconstruction is a key feature, ranking second in importance after accumulated AE count. • Field validation at a phosphate mine in Guizhou, China, confirms the practical applicability of the method.