Mine barrel monitoring method

Abstract

The invention discloses a mine barrel monitoring method, and belongs to the field of underground monitoring. A plurality of circles of annular pressure relief grooves are formed in the inner wall of amine barrel at intervals in the axial direction. The method comprises the steps that annular force transmission media are installed in the annular pressure relief grooves, and a plurality of fiber grating strain sensors are installed on the wall of an annular installation groove formed by the annular pressure relief grooves and the annular force transmission media; a strain signal of the mine barrel is acquired in real time through the fiber grating strain sensors; the strain signal is guided into a demodulator at the outside of the mine barrel through an optical cable; the strain signal is converted through the demodulator and transmitted to a data acquisition instrument outside the mine barrel, so that real-time monitoring of stress and deformation conditions of the mine barrel is achieved. According to the method, the mine barrel is automatically monitored, the method is simple and timely, through the annular force transmission media and the fiber grating strain sensors, the adaptability to the monitoring environment is high, the anti-interference capability is high, the stress and deformation conditions of the wall rock mass of the whole mine barrel can be accurately obtainedin real time, and monitoring data are diversified.

Description

technical field [0001] The invention relates to the field of underground monitoring, in particular to a mine shaft monitoring method. Background technique [0002] During the operation process, the mine shaft shaft (referred to as the mine shaft) will be stressed and deformed by various factors. In order to ensure the safety of mine production, it is necessary to monitor the force and deformation of the mine shaft in real time. [0003] At present, the monitoring methods for mine shafts are mainly divided into physical appearance characteristic monitoring methods and rock mass internal stress monitoring methods. Among them, the monitoring method of physical appearance characteristics mainly adopts perforated steel tape convergence meter, photoelectric range finder, mechanical roof abscission instrument, etc., and the monitoring method of internal stress of rock mass mainly adopts acoustic emission instrument, microseismic detector, and drilling cuttings method. Monitor. ...

AI Technical Summary

Problems solved by technology

[0004]However, physical appearance characteristics monitoring methods generally require manual periodic measurement, which is cumbersome and not timely

Acoustic emission instruments and microseismic detectors have high requirements on the monitoring environment, and their monitoring accuracy is easily affected by the external environment. The drilling cuttings method requires high professional experience of monitoring personnel, and is only suitable for local and small-scale monitoring

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