A method and system for sensing the deformation of roadway surrounding rock with an optical fiber embedded flexible rod body

Abstract

The invention relates to a method and system for sensing deformation of roadway surrounding rock with an embedded flexible rod body of an optical fiber, belonging to the field of coal mine surrounding rock monitoring. The method is as follows: step 1: construct strain sensing optical fiber; step 2: construct optical fiber embedded flexible rod body; step 3: form multi-dimensional three-dimensional optical fiber layout process; After correcting the strain deformation and the fixed-point data, the instability risk coefficient S and the daily deformation T d . Deformation rate V; Step 6: Determine the state of the surrounding rock and issue an early warning. The present invention can realize the major transition from "point" observation to "surface" monitoring of surrounding rock deformation, real-time collection and transmission of monitoring data, analysis and early warning, all-round and continuous monitoring of roadway surrounding rock deformation, and intelligent identification and early warning of surrounding rock stable state .

Description

A method and system for sensing the deformation of surrounding rock of roadway with an optical fiber embedded flexible rod technical field The invention belongs to the field of coal mine surrounding rock monitoring, and relates to a kind of optical fiber embedded flexible rod body sensing roadway surrounding rock deformation method and system. Background technique The hidden safety hazard caused by surrounding rock caving and layer separation is one of the most common hidden hazard types in mines, which seriously threatens Safe production in mines. For a long time, the observation of the surrounding rock of the roadway mainly adopts the method of "point arrangement" to measure the separation and support Although it is convenient to detect signs of instability of surrounding rock early and avoid the occurrence of roof accidents to a certain extent, It is because its limitations in practical applications are becoming more and more obvious. For example, the point obser...

AI Technical Summary

Problems solved by technology

For a long time, the observation of the surrounding rock of the roadway has mainly used the method of "point arrangement" to observe the force of the separation layer and the support body. However, its limitations in practical applications are becoming more and more obvious. For example, the way of point observation cannot realize the full coverage of hidden dangers on the roof, the observation instruments are greatly affected by underground humidity and electromagnetic environment, and the acquisition of observation data mainly depends on manual reading of records. , The timeliness of data acquisition and analysis is poor, etc.

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