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An online monitoring system for lateral deformation of filling body based on fiber grating sensing

A technology of fiber grating and lateral deformation, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of inability to realize filling body monitoring, achieve good monitoring effect, high measurement accuracy, and avoid electromagnetic interference

Active Publication Date: 2021-01-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN202467929U and CN103528731A respectively disclose a filling body performance online monitoring system and a coal mine paste filling online monitoring system based on fiber grating sensing. They all only monitor the vertical deformation and stress of the filling body, but cannot Realize the monitoring of lateral deformation of filling body

Method used

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  • An online monitoring system for lateral deformation of filling body based on fiber grating sensing
  • An online monitoring system for lateral deformation of filling body based on fiber grating sensing
  • An online monitoring system for lateral deformation of filling body based on fiber grating sensing

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Experimental program
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Effect test

Embodiment 1

[0051] An on-line monitoring system for lateral deformation of a filling body based on fiber Bragg grating sensing, including a bidirectional displacement measuring device based on fiber Bragg grating sensing, a fixed disk, a coupler, an optical fiber, a mine optical cable, a fiber grating demodulator, and a computer system.

[0052] The bidirectional displacement measurement device based on fiber grating sensing includes a housing, an upper cover, a steel pipe, an extension line and two fiber grating displacement sensors; the housing is a hollow cuboid structure without a cover, and a sealing ring is provided at the upper opening;

[0053] The optical fiber grating displacement sensor is preferably a rod-type optical fiber grating sensor, and the optical fiber grating displacement sensor is fixedly connected to the housing; the housing and the upper cover are connected by bolts; the housing and the upper cover are preferably made of high-strength fine steel.

[0054] There is ...

Embodiment 2

[0065] combine Figure 6 As shown, the installation and monitoring method of the online monitoring system for lateral deformation of the filling body based on fiber Bragg grating sensing in Embodiment 1 is as follows:

[0066] The first step, according to the specific measurement purpose, intercept the extension line of appropriate length, and select a certain number of steel pipes, connect the shell with the steel pipe, extension line and fixed plate, and connect the connected two-way sensor based on fiber grating sensor The displacement measuring device is installed in a suitable position;

[0067] The second step is to connect the optical fiber connectors of each arranged bidirectional displacement measurement device based on fiber grating sensing to the optical fiber through the coupler, connect the optical fiber to the mine optical cable through the coupler, and the mine optical cable to the fiber grating demodulator Connect, connect the fiber grating demodulator with th...

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Abstract

The invention discloses a filling body transverse deformation online monitoring system based on fiber bragg grating sensing, and relates to the technical field of mine filling body monitoring. The device comprises a bidirectional displacement measuring device based on fiber bragg grating sensing, a fixed disc, a coupler, an optical fiber, a mining optical cable, a fiber bragg grating demodulator and a computer system, the bidirectional displacement measuring device based on fiber bragg grating sensing comprises a measuring main body, an extension line, a steel pipe and two fiber bragg gratingdisplacement sensors, wherein the measuring main body comprises a shell and an upper cover matched with the shell; the shell is of a hollow cuboid structure, the left side and the right side of the shell are each provided with an outlet, the movable pull rods of the two fiber bragg grating displacement sensors penetrate through the outlets in the left side and the right side respectively and facethe outlets in the left side and the right side of the shell, and the axes of the movable pull rods are overlapped with the axes of the corresponding outlets. Real-time and on-line remote monitoring of the left side, the right side and the total transverse deformation of the filling body can be achieved.

Description

technical field [0001] The invention relates to the technical field of mine filling body monitoring, in particular to an online monitoring system for lateral deformation of filling bodies based on fiber grating sensing. Background technique [0002] Filling mining refers to the use of filling materials to fill the goaf after underground coal resources are mined. The filling body can effectively support the overlying rock stratum, and the deformation value of the ground surface is controlled within the allowable deformation range of the building (structure). Safe recovery of coal resources under mines, and at the same time protect the ecological environment and groundwater resources in the mining area. Filling mining is an important technical method for mining "three-down" coal pressing in my country. In recent years, with the continuous improvement of environmental protection requirements in China, filling mining technology has been more and more widely used in my country. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
CPCG01B11/165
Inventor 江宁冯帆潘海洋尹大伟马俊彪马波汪锋刘奇赵金海李杨杨张士川蒋邦友
Owner SHANDONG UNIV OF SCI & TECH
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