The invention destruction to exclude the data collected discontinuously in time evaluation period of suspension or evaluation criteria in a state to set the number of data in the variable relates to the AE evaluation data processing method for a fracture surface to be surface treated by the AE evaluation data enhance the reliability evaluation of the fracture. ; This AE data processing method for a fracture surface of the invention are evaluated for surface destruction AE AE evaluation for processing the collected data are converted into data after the AE measurement from the target surface at least one AE sensor embedded therein to slope failure evaluation A data processing method, by collecting the AE data storing step (a); The destruction evaluation to determine if the stop period setting step (b) and the stored data while ignoring this, the AE if the stop period is set to the rated breaking and otherwise processing the stored data by applying the AE evaluation term for interrupting the fracture to process (c) comprises a step.
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