Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method

A technology of relative displacement and oil and gas pipelines, which is applied in the field of measurement, measurement similar to linear dimensions and pipeline systems, and can solve problems such as pipeline soil in goafs not seen

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...

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  • Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method
  • Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method
  • Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method

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Embodiment

[0089] Embodiment. This example is an experimental method and system, and its constitution is as Figure 1-Figure 8 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.

[0090] The process flow of the relative displacement monitoring method of oil and gas pipelines in the goaf subsidence area based on fiber bragg grating sensing technology 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 relative displacement of the pipe and soil. , so as to determine the state stability of th...

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Abstract

The invention provides a mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, a system thereof, and a system construction method. A wavelength signal acquired by s sensor is subjected to demodulation and pretreatment at an on-site monitoring station, and is sent to a remote monitoring center through remote transmission; the monitoring center receives data, carries out further analysis processing on the data through a specific algorithm, and calculates mining subsidence area pipe soil relative displacement change; through dynamic display of the mining subsidence area pipe soil relative displacement change, state stabilization conditions of pipe body and soil strain change are subjected to determination to determine whether the data exceeds a threshold or not; an alarming condition of pipe soil relative displacement is that a monitoring value exceeds a preset value and maintains constant; when a property value is less than the threshold, it is showsthat a pipeline is in a safe state; when a pipe soil relative displacement value reaches the threshold and maintains constant, an early warning of pipeline security is carried out.

Description

technical field [0001] The present invention is a method and system for monitoring the relative displacement of oil and gas pipelines in goaf subsidence areas based on optical fiber grating sensing technology, a system and a construction method for the system, and relates to the technical field of measuring stress, temperature, similar linear dimensions, 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 geolog...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01B11/16
Inventor 马云宾吴张中周琰林明春荆宏远韩冰宋宁李俊
Owner PIPECHINA SOUTH CHINA CO
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