Frequency Analysis of AE Signals in Point Load Tester Experiments on Black Granite

Abstract

In this article, by performing point load tests on granite and using sound wave propagation technology, the formation of the microcracks and their corresponding emitted signals have been investigated. An induction seismic sensor has been used to receive induced seismic waves. Following the detection of the seismic signal, the stored frequency spectra are analyzed. In these experiments, the force imposed on the granite stone is calculated and the elastic waves are checked at a specific frequency. The Nondestructive method is used for monitoring and controlling the behavior of deep stone structures. By analyzing the signals and calculating the average frequency in the laboratory environment, the cracks in granite samples are detected. This can be potentially applied in the granite mined to alarm warnings before possible collapses.