System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area

Abstract

The invention discloses a system for monitoring pipe-soil relative displacement of an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. A pipe-soil relative displacement sensor a (3) is arranged on the monitoring section of an oil-gas pipeline a (2) of a mining subsidence area (1), and is connected with an optical cable a (5) which is led to a monitoring station through a fiber junction box (4); in the monitoring station, the optical cable a (5) is connected with an optical switch (6); the optical switch (8) is connected with a fiber grating demodulator (7); the demodulator (7) is connected with a lower computer (8); and data preprocessed with the lower computer (8) are transmitted through a wireless communication module a (9), received by a wireless communication module b (10) and transmitted to an upper computer (11). The system has high space resolution and low cost, and is safe and effective.

Description

technical field [0001] The invention relates to a system for monitoring relative displacement of oil and gas pipelines in goaf subsidence areas 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 lif...

AI Technical Summary

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 deformation data of rock and soil, there is no report on the application of fiber grating sensing technology in the monitoring of relative displacement of pipe and soil in goaf

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