Pseudo Kaiser point rectification of rock acoustic emission based on energy principle

The traditional method of obtaining the Kaiser point is to use the acoustic emission experiment for shale,but the Kaiser point may not be the real Kaiser point. using the theory that there is a large difference between the energy distribution of the real Kaiser point from shale rock acoustic emission and the energy distribution of the non-Kaiser point (as predecessors have proved),the relationship between the Energy E,the AE count and the stress condition is gradually obtained by theoretical deduction. It is found that the Energy E is proportional to the band amplitude and the AE count and inversely proportional to the threshold. The threshold is inversely proportional to the stress state. Based on this theory,the analysis compares the “ pseudo” Kaiser point with the theoretical value,determines whether the threshold voltage increases or decreases,finds the reverse point on the pressure curve,reobtains the Kaiser point,takes an energy correction about the pseudo Kaiser point,and finds the real Kaiser point. The result has been proved reason- able by energy spectrum analysis and RFPA simulation system.