Homologous monitoring stress and acoustic emission integrated sensor, monitoring method and mounting method

Abstract

The invention belongs to the technical field of mining monitoring, and discloses a homologous monitoring stress and acoustic emission integrated sensor, a monitoring method and a mounting method, the sensor device comprises an acoustic emission probe, an amplifier, a stress sensor, a tilt angle sensor and a circuit board; the acoustic emission probe comprises a piezoelectric ceramic crystal and a guide head; the front end face of the piezoelectric ceramic crystal and the rear end face of the guide head are in plane contact, and the piezoelectric ceramic crystal and the amplifier at the rear end are integrated. The stress sensor comprises a hydraulic cylinder body, an elastic body and a pressure-bearing sheet; the hydraulic cylinder is connected with the elastomer through the piston and the connecting device; the pressure-bearing sheet is mounted on one side of the elastomer; the circuit board is connected with the amplifier through a power supply line. The technical problems of high randomness and poor accuracy of early warning of a single sensor are discarded, a thought of integrating the sensor is provided, mechanical and acoustic monitoring methods are integrated into the unified sensor, coupling monitoring of multi-source information is realized, and the early warning accuracy is improved.

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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