A Coal Mine Paste Filling Online Monitoring System Based on Fiber Bragg Grating Sensing

A fiber grating and paste filling technology, which is applied in the measurement, measurement device, optical device and other directions of measuring the change force of the optical properties of the material when it is stressed, can solve the problem of not being able to adapt to high temperature, high pressure or water, and unable to complete the filling Problems such as body monitoring tasks, manual measurement of force and deformation, etc., to achieve the effect of guiding on-site production and scientific research work, improving monitoring accuracy, and on-site safety

CN103528731BActive Publication Date: 2015-10-21CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-10-21

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Abstract

The invention relates to a coal mine paste filler online monitoring system based on optical fiber grating sensing, and belongs to a mine filler online monitoring system. Before space of each measuring point is filled, a supporting rod is fixed to a filling space bottom plate through ground anchors, a telescopic rod telescopically supports a filling space top plate, an optical fiber grating sensor group is mounted in the middle of the telescopic rod, and an optical fiber connector is lead out of the tail part of the supporting rod and connected to a mine optical cable through optical fiber, so that an optical grating monitoring signal is transmitted to an optical fiber grating demodulation instrument; and a demodulated signal is transmitted to a computer system, and a paste filler is subjected to real-time online monitoring and analysis process after the space is filled. The system has the advantages as follows: the equipment installation is simple, and the system is suitable for general popularization; underground power supply is not required, and the scene safety is guaranteed; full-optical measurement and optical fiber transmission are adopted, so that influence of electromagnetic interference is effectively avoided; a temperature compensation optical grating is adopted for compensating temperature errors, so that the monitoring accuracy is improved greatly; and the monitoring result can be timely provided, and guidance of scene production and scientific research is facilitated.
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Description

technical field

[0001] The invention relates to an online monitoring system for mine filling body, in particular to an online monitoring system for coal mine paste filling based on optical fiber grating sensing. Background technique

[0002] Filling mining technology is a major innovation in coal mining technology as a solution to coal mining under buildings, under railways, under water bodies and above confined water. Among them, paste filling is an important part of coal mine green mining technology. Coal gangue, fly ash, industrial slag, inferior soil, urban solid waste, etc. near the coal mine are processed on the ground into a toothpaste-like slurry that does not require dehydration. , using filling pumps or gravity pressurization, transported to the underground through pipelines, filling goafs or abscission areas in a timely manner, forming an overlying rock support system mainly composed of paste fillings, and effectively controlling surface subsidence within the allo...

Examples

Embodiment 1

[0017] Example 1: In figure 1 Among them, the system includes: telescopic rod 3, support rod 4, optical fiber connector 5, ground anchor 6, fiber grating sensor group 7, optical fiber 8, mine optical cable 9, fiber grating demodulator 10 and computer system 11; Before the space at measuring point 16 is filled, the support rod 4 is fixed to the bottom plate 2 of the filling space through the ground anchor 6, the telescopic rod 3 telescopically supports the top plate 1 of the filling space, the fiber grating sensor group 7 is installed in the middle of the telescopic rod 3, and the tail of the support rod 4 is drawn out The optical fiber connector 5 is connected to the mine optical cable 9 through the optical fiber 8, and the mine optical cable 9 is connected to the fiber grating demodulator 10, so that the grating monitoring signal is transmitted to the fiber grating demodulator 10, and the fiber grating demodulator 10 is connected to the computer The system 11 is connected, an...