Slight shock monitoring system based on fiber grating acceleration sensor, and mounting and monitoring method thereof

Abstract

The invention relates to a slight shock monitoring system based on a fiber grating acceleration sensor, and a mounting and monitoring method thereof and is suitable for the mine safety monitoring field. The system comprises a data management and storage subsystem, a data acquisition and transmission subsystem and a sensing subsystem, wherein the data management and storage subsystem comprises a client computer, a monitoring server and a data reception computer and is arranged in a ground central air conditioner room, the data acquisition and transmission subsystem comprises mine cables, a fiber grating dynamic demodulation instrument and a mine multi-core transmission optical cable, the sensing subsystem comprises the fiber grating acceleration sensor, fiber tail fiber and fiber wiring boxes, the mine multi-core transmission optical cable is connected in series with the multiple fiber wiring boxes, and the fiber grating acceleration sensor is connected with the fiber wiring boxes through the fiber tail fiber. The system is advantaged in that anti-electromagnetic interference capability is strong, environment influence is small, sensitivity is good, measurement precision is high, slight shock signals can be sensed, a signal oscillogram can be drafted, and the epicentre position, magnitude and the generation time are determined.

Description

technical field [0001] The invention relates to a microseismic monitoring system and an installation and monitoring method, and is especially suitable for a microseismic monitoring system based on an optical fiber grating acceleration sensor used for mine safety monitoring and an installation and monitoring method. Background technique [0002] In my country, coal has always been the dominant energy mineral. However, mine disasters, engineering and environmental damage caused by the exploitation of coal resources are also unavoidable practical problems. With the increase in the scale and depth of mine mining in my country year by year, the disasters and accidents induced by deep mining represented by rock burst, mine earthquake, water inrush, large-scale roof collapse, and heat damage are more sudden and destructive. Among them, rock burst, as a destructive mine earthquake induced by mining activities, seriously threatens the safe production of mines with its sudden, sharp a...

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Problems solved by technology

[0004] Although these microseismic monitoring systems have been practically applied and achieved certain results, the sensors that receive the vibration signals are all processed by electrical signals. In complex environments such as strong electricity and magnetism in mines, it is inevitable to be mixed with other interferences, which is necessary for later data processing. Increase the difficulty

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