Method and system for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area
A technology of relative displacement and oil and gas pipelines, which is applied in pipeline systems, measuring devices, optical devices, etc., and can solve problems such as unseen goaf pipe soil
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[0086] 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.
[0087] 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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