Geo-acoustic event location method and instability disaster early warning method based on same, geo-acoustic sensor, monitoring system, and readable storage medium

A geo-acoustic event monitoring system, comprising a geo-acoustic signal sensing module, a geo-acoustic event location module and a geo-acoustic event instability disaster early warning module, wherein the geo-acoustic signal sensing module, the geo-acoustic event location module and the geo-acoustic event instability disaster early warning module are connected in a communication mode,

• wherein the geo-acoustic signal sensing module is configured for sensing geo-acoustic signals;
• the geo-acoustic event location module is configured for locating geo-acoustic events by using a geo-acoustic event location method;
• and
• the geo-acoustic event instability disaster early warning module is configured for performing instability disaster early warning analysis by using an instability disaster early warning method based on the geo-acoustic event location method, wherein the instability disaster early warning method comprises the following steps:
• step 1:
• forming self-clustering clusters according to a location result of the geo-acoustic event, the self-clustering clusters being obtained by clustering a spatial distribution of the geo-acoustic event;
• step 2:
• counting precursor index information of each of the self-clustering clusters according to a pre-set time window,
• wherein the precursor index information is any combination of indexes of a relative energy, a moment magnitude, an apparent volume, b value of each of the self-clustering clusters, a time series change of a rate of geo-acoustic events, a dominant frequency and a corner frequency of the geo-acoustic event in each of the self-clustering clusters;
• and
• if a sum of a category of precursor indexes of all the geo-acoustic events in each of the self-clustering clusters under one time window becomes larger compared with a sum of a same category of precursor indexes under a previous time window, a precursor factor of the corresponding precursor index is 1;
• and
• step 3:
• performing instability disaster early warning analysis based on precursor factors of precursor indexes of each of the self-clustering clusters, wherein a risk increases as a sum of the precursor factors of all the precursor indexes of each of the self-clustering clusters increases, wherein the geo-acoustic event location method comprising the following steps:
• S1:
• acquiring an observed value of a waveform characterization quantity of the geo-acoustic event, the waveform characterization quantity comprising:
• any combination of an arrival time time domain parameters, spectral information, and waveform shape of a geo-acoustic signal when a wave generated by a geo-acoustic event source reaches any monitoring point;
• S2:
• constructing a theoretical propagation difference model and an observed propagation difference model of the waveform characterization quantity between monitoring points, wherein a waveform characterization quantity difference value between two monitoring points is calculated;
• and
• S3:
• constructing an objective function based on the theoretical propagation difference model and the observed propagation difference model and obtaining a location of the geo-acoustic event by inversion based on the objective function.