Coal mine working face rib fall monitoring system based on fiber grating and three dimensional laser scanning

Abstract

A coal mine working face rib fall monitoring system based on fiber grating and three dimensional laser scanning belongs to a coal mine working face rib fall identification monitoring system; a ground data processing system of the identification monitoring system is connected with a downhole data transmission system through a transmission fiber; the data transmission system is connected with a downhole data acquisition system through a fiber pigtail; the working face three dimensional coordinate data and angle values are obtained through three dimensional laser scanning; fiber grating sensors arranged in the downhole can monitor the working face roof pressure, the hydraulic support working resistance, the roof sinkage and the temperature information; the advantages are that the monitoring system uses the features that the three dimensional laser scanning process is fast in measurement, strong in penetrability and visualization, and needs no contact; the fiber grating technology is strong in anti-electromagnetic interference ability under downhole severe environment, thus providing accurate and timely monitoring data for the ground, returning processed data to the underground, preventing downhole calamities, and ensuring the downhole production safety and personnel personal safety.

Description

technical field [0001] The invention relates to a coal mine working face side recognition monitoring system, in particular to a coal mine working face side side monitoring system based on optical fiber grating and three-dimensional laser scanning. Background technique [0002] In the process of mine production, due to improper excavation or support, large-scale collapse of the coal wall of the working face will cause injury accidents. When an accident is about to happen, if no corresponding measures are taken in advance, it will directly affect the personal safety of coal miners and the smooth progress of mine production operations. Therefore, in order to prevent such accidents from causing personal injury to underground workers, it is necessary to monitor the coal wall of the working face in time to understand the stability of the coal wall, thereby avoiding such accidents and ensuring the personal and property safety of underground workers. [0003] At present, the safety...

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Problems solved by technology

[0003] At present, the safety monitoring devices commonly used in coal mines in my country have poor anti-electromagnetic interference capabilities; at the same time, due to the harsh environment and poor lighting conditions in the mines, human reading errors are relatively large; traditional monitoring methods are easily affected by electromagnetic interference and external environments. Not good; not moisture-proof, low reliability, short service life, can not meet the requirements of long-term monitoring

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