[Retracted] A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

Table 2

Acoustic emission acquisition parameter setting.

Threshold value	Preamplifier gain	Lower limit of analog filter	Upper limit of analog filter	Sampling rate	Sampling length
40 dB	40 dB	100 KHz	3 MHz	1 MSPS	2 k