Acoustic emission multi-precursor method and device for early warning of tension-shear dumping karst dangerous rock instability

Abstract

The invention discloses an acoustic emission multi-precursor method and device for early warning of the instability of dangerous rocks of tension-shear toppling type karst, so as to solve the problem of automatic early warning of dangerous rock collapse disasters of tension-shear toppling type in karst areas. Firstly, according to the change characteristics of acoustic emission on the eve of dangerous rock instability, the relationship rules between four kinds of acoustic emission precursor characteristics and stability grades of dangerous rocks are formulated; The four kinds of acoustic emission precursor features in the stage are used as the machine learning sample set; finally, the information vector machine machine learning model with excellent adaptability to complex classification problems is trained by using the training sample set, thereby establishing the non-correlation relationship between the acoustic emission precursor features and the stability of dangerous rocks. The linear mapping relationship is used to realize the rapid evaluation of the stability level of dangerous rocks in online monitoring, and the evaluation results are transmitted to the early warning information receiving terminal of the dangerous rock manager through the early warning device.

Description

technical field [0001] The invention belongs to the technical field of geological disaster prevention and control engineering, and relates to a method and a device for early-warning the instability and collapse of a pulling-shear dumping type karst dangerous rock by using an acoustic emission signal. Background technique [0002] Dangerous rock refers to a geological body that is cut and separated by multiple groups of structural planes, has poor stability, and may collapse in the form of dumping, falling, and slippage. The tension-shear dumping dangerous rock is a dangerous rock mass separated from the stable parent rock by a steeply inclined structural plane on a steep slope. Under the action of gravity and other factors, it usually rotates around the lower end of the main control structural plane or the intersection of the lower end and the free surface. Toppling failure, prone to overturning and instability, showing a tensile shear failure mechanism, see attached figure...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of the huge hazards of the tension-shear toppling karst dangerous rock instability and collapse disasters and the low reliability of existing early warning methods based on mechanical analysis, numerical calculation, and physical tests, and adopt rock mass rupture acoustic emission signals Monitoring technology means, the information vector machine machine learning method is introduced into the comprehensive early warning of the instability and collapse of the tension-shear dumping karst dangerous rock based on the multiple precursor characteristics of the acoustic emission signal, and a method of early warning of the instability of the tension-shear dumping karst dangerous rock is proposed. Acoustic emission multi-precursor method and device to effectively realize reasonable early warning of tension-shear toppling karst dangerous rock instability and collapse disasters

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