Stress and acoustic emission integrated sensor for homologous monitoring, monitoring method, installation method

Abstract

The invention belongs to the technical field of mining monitoring, and discloses a stress and acoustic emission integrated sensor for homologous monitoring, a monitoring method, and an installation method. The sensor device includes an acoustic emission probe, an amplifier, a stress sensor, an inclination sensor, and a circuit board; The probe includes: piezoelectric ceramic crystal and guide head; the front surface of the piezoelectric ceramic crystal is in plane contact with the rear end surface of the guide head, and the piezoelectric ceramic crystal is integrated with the amplifier at the rear end; the stress sensor includes: hydraulic cylinder block, elastic body and bearing Pressing the tablet; the hydraulic cylinder body is connected to the elastic body through the piston and the connecting device, and the pressure-bearing sheet is installed on one side of the elastic body; the circuit board is connected to the amplifier through the power supply line. The present invention eliminates the technical problems of arbitrariness and poor accuracy of single sensor early warning, proposes the idea of ​​integrated sensors, integrates mechanical and acoustic monitoring methods into a unified sensor, realizes coupling monitoring of multi-source information, and improves the accuracy of early warning.

Description

technical field [0001] The invention belongs to the technical field of mining monitoring, and in particular relates to a stress and acoustic emission integrated sensor for homologous monitoring, a monitoring method and an installation method. Background technique [0002] At present, for underground mining, under the comprehensive influence of original stress, mining disturbance stress and rock mass structure, when the strength of the ore body or surrounding rock exceeds its own strength, the ore and rock mass will be unstable and damaged, causing different degrees of ground pressure activities. It directly threatens the safety of mine recovery. At present, the main methods of monitoring the stability of surrounding rock in mining include stress monitoring, displacement monitoring, acoustic emission monitoring and microseismic monitoring. For hard rock mines, stress, acoustic emission, and microseismic monitoring methods are often used. [0003] Stress Monitoring: [0004]...

AI Technical Summary

Problems solved by technology

[0010] (1) In the existing technology of ground pressure activity monitoring and early warning, the single sensor early warning is arbitrarily large and the accuracy is poor

[0011] (2) The misjudgment rate of ground pressure in the existing technology is relatively high

Simultaneous collection and feedback of mechanical and acoustic information cannot be achieved at the same monitoring point

[0012] (3) The prior art monitoring installation cost and drilling construction cost are high

[0015] The present invention mainly aims at the defects of the above-mentioned traditional ground pressure activity monitoring and early warning technology, and eliminates the technical problems of arbitrariness and poor accuracy of single sensor early warning, and proposes the idea of ​​integrating sensors, integrating stress and acoustic emission monitoring methods into a unified sensor, realizing multiple Coupling monitoring of source information to improve the accuracy of early warning

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