A mine-used random high-pressure non-destructive optical fiber Bragg grating single pillar pressure sensor system

Abstract

A mining random high-voltage lossless optical fiber Bragg grating single prop pressure sensor system comprises a press frame.A hydraulic prop top base and a prop movable column are arranged below the bottom face of the top of the press frame.The outer portion of the prop movable column is an outer prop body.A liquid injection valve is arranged outside a prop.A prop base is arranged at the bottom of the prop.A prop pressure sensor is arranged on the prop foot face of the prop.A base baffle is arranged outside the prop pressure sensor.An FC / APC interface is formed in one side of the prop pressure sensor.An optical fiber cable is inserted in the FC / APC interface and penetrates through the base baffle to be connected with an Sm225 interrogator.The interrogator is connected with a computer.The computer, a 500 KN pressure control console, a hydraulic machine pump station, and the liquid injection valve on the hydraulic prop are connected in series.By means of the mining random high-voltage lossless optical fiber Bragg grating single prop pressure sensor, the pressure of the single prop in a tunnel can be monitored at any time and can be adjusted in time, the axial pressure of the single prop in the whole use period can be measured, and an optical fiber grading sensor network can be formed through wide distribution in a stope.

Description

technical field [0001] The invention relates to a force detection instrument for a single hydraulic prop, in particular to a mine-used random high-pressure non-destructive optical fiber Bragg grating single prop pressure sensor system. Background technique [0002] Since the single hydraulic prop was introduced into China in the 1980s, it has gradually become an important means of reinforcement support and temporary support in underground stopes of coal mines and in areas affected by the support pressure of section roadways. Restricted by the requirements of the stope, the top and bottom of the section roadway, the slate property, the underground working environment, and the safety production of the coal mine, there is a lack of long-term, continuous, and reliable support for the deformation of the roof and the floor and the stress of the single pillar (bracket) during the production process. Intrinsically safe monitoring means; on the other hand, due to the continuous diffu...

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Problems solved by technology

[0005] In order to solve the problem that the current underground hydraulic pressure detector cannot perform large-scale, random, and automatic real-time observation of the pressure on the pillars in the stope and the roadway, and the meter is large in size and not easy to carry; the invention provides a random high-pressure non-destructive Optical fiber Bragg grating single pillar pressure sensor system, the random high-pressure non-destructive fiber Bragg grating single pillar pressure sensor for mine is a new type of optical single pillar real-time nondestructive pressure sensor system, which can realize the monitoring of stope, section Non-destructive and timely on-site detection of any single pillar near the roadway, without manual measurement, fully automated, and the pressure of the single pillar can be adjusted through the measurement results, and the pressure of the single pillar can be adjusted along the axial direction of the pillar throughout the service life Through the extensive arrangement in the stope, a fiber grating sensor network can be formed to verify the influence of the support pressure caused by the mining face on the pressure law of the roof and floor of the roadway and provide real-time pressure change data for disaster warning.

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