Strain type rockburst early warning method based on acoustic signal spectral analysis

Abstract

A strain type rockburst early warning method based on acoustic signal spectral analysis includes the following steps: acoustic signal acquisition equipment is utilized to acquire acoustic signals in a strain type rockburst destruction process in real time, the acquired acoustic signals are transmitted to an acoustic signal processing system, and are recorded and analyzed in real time; denoising processing is performed on the acquired acoustic signals first, and then spectral analysis is performed in real time on the acoustic signals after denoising, thereby obtaining an amplitude spectrogram of the acoustic signals; whether the development tendency of strain type rockburst exists is judged by analyzing spectrum characteristics of the acoustic signal, and if ''wideband low-amplitude and multi-peak'' acoustic signals appear later, that a strain rockburst disaster is very likely to happen is predicted, and the acoustic signal processing system gives an alarm at a server terminal. The strain type rockburst early warning method based on acoustic signal spectral analysis belongs to a non-contact real-time monitoring means, and has the advantages of remote controllability, safe installation operation, and reliable and stable signals.

Description

technical field [0001] The present invention relates to a strain-type rockburst early warning method based on frequency spectrum analysis of sound signals, in particular, it involves performing frequency spectrum analysis on sound signals recognizable by human ears during the incubation process of rockbursts, and using it as a method for judging whether there is a rockburst. The possibility of rockburst and the precursor information of the upcoming rockburst belong to the field of rock mechanics and engineering technology. Background technique [0002] At present, with the expansion of underground engineering to the deep, the problem of rockburst has become increasingly prominent. Rockburst is a dynamic failure phenomenon of surrounding rock caused by excavation and unloading of hard rock under high ground stress. Different from the general static brittle failure phenomenon, the remarkable feature of rockburst is the occurrence of ejection fracture. The strain-type rockburs...

AI Technical Summary

Problems solved by technology

Previous research results and current engineering geological survey regulations in my country only generally use the sound level of people in the rockburst process as the basis for judging the rockburst level, ignoring the role of sound signals in rockburst early warning

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