High-strength rock crustal stress K point testing method based on Kaiser effect

The invention discloses a high-strength rock crustal stress K point testing method based on a Kaiser effect. An undisturbed high-proportion concrete test piece replaces a rock test piece; influence caused by original occurrence stress is eliminated; two resonant frequency sensors of NANO30 (in the resonant frequency of 140 kHz and dominant frequency band of 125-750 kHz) and R6 alpha (in the resonant frequency of 60 kHz and the dominant frequency band of 35-100 kHz) are used to collect high-frequency AE signals and low-frequency AE signals, two representative acoustic emission time domain parameters are used for comprehensively and preliminarily determining a K point, the accuracy of the K point is checked according to the distribution characteristics of the main frequency of the K point, and verification is implemented again from the aspect of multi-band energy distribution characteristics. Thus, the method for improving the test accuracy through mutual evidence of the three methods isestablished. 本发明公开了一种基于K