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Mined-out subsidence area soil horizontal deformation monitoring method and system thereof

A technology of horizontal deformation and collapsed areas, applied in the direction of measuring devices, optical devices, instruments, etc.

Active Publication Date: 2012-02-08
PIPECHINA SOUTH CHINA CO
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Problems solved by technology

[0018] Due to these advantages, in the field of geotechnical engineering, fiber grating sensors are easy to embed in rock and soil for high-resolution and wide-range measurement of internal strain and temperature. The technical advantages are very obvious, especially in the ability to obtain long-term, Reliable rock and soil deformation data, there is no report on the application of fiber grating sensing technology to monitor the horizontal deformation of soil in the goaf pipeline laying belt

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  • Mined-out subsidence area soil horizontal deformation monitoring method and system thereof
  • Mined-out subsidence area soil horizontal deformation monitoring method and system thereof
  • Mined-out subsidence area soil horizontal deformation monitoring method and system thereof

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Embodiment

[0079] Embodiment. This example is an experimental method and system, and its constitution is as Figure 1-Figure 7 shown. The test was carried out in a goaf subsidence area with mining depth ratio of 10, mining length of 15m, pipeline buried depth of 3m and pipeline length of 130m. The diameter of the pipeline is 168mm, the wall thickness is 6mm, and the steel grade is L245.

[0080] The process flow of the real-time online monitoring method of soil horizontal deformation in goaf subsidence area based on fiber grating is as follows: figure 1 shown. After the wavelength signal collected by the sensor is demodulated and preprocessed at the on-site monitoring station, it is remotely transmitted to the off-site monitoring center. After receiving the data, the monitoring center further analyzes and processes the data through a specific algorithm to calculate the collapse of the goaf. The horizontal deformation changes, so as to judge the state stability of the soil strain change...

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Abstract

The invention discloses a mined-out subsidence area soil horizontal deformation monitoring method and a system thereof. A fiber grating sensing net a (3) real-timely monitors soil horizontal deformation above a pipeline a (2). Collected data is through an optical cable a (5), an optical switch (6), and then is demodulated and transmitted by a fiber grating demodulation device (7) to a lower computer (8). The lower computer (8) calls a self-written program, controls the optical switch (6) and the fiber grating demodulation device (7), and collects the data and carries out pretreatment to the data. The pretreated data is transmitted through a GPRS communication module a (9) and is received by the GPRS communication module b (10) to an upper computer (11). The upper computer (11) analyzes the soil horizontal deformation data and determines a stabilization state of the mined-out subsidence area soil and a safety state of the pipeline according to changes of a monitoring curve and a monitoring value.

Description

technical field [0001] The invention relates to a method and system for monitoring horizontal deformation of soil in a goaf subsidence area based on optical fiber grating sensing technology, and relates to the technical fields of stress measurement, temperature measurement, similar linear dimension measurement, and pipeline systems. Background technique [0002] The space formed after the underground mine is mined is called the goaf. After the underground mineral layer is mined, the upper rock layer loses its support, the balance condition is destroyed, and then it bends and collapses, so that the surface sinks and deforms, causing the surface to subside and form a depression. With the continuous expansion of the goaf, the depression continues to develop and form the goaf subsidence area, which will cause damage to the above-ground or underground buildings (structures). Goaf subsidence disaster is one of the main forms of geological disasters that cause loss of human life a...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01B11/02
Inventor 吴张中马云宾郝建斌韩冰荆宏远刘建平谭东杰蔡永军杨喜良
Owner PIPECHINA SOUTH CHINA CO
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