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

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...

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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 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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