Coal mine paste filler online monitoring system based on optical fiber grating sensing

Abstract

The invention relates to a coal mine paste filler online monitoring system based on optical fiber grating sensing, and belongs to a mine filler online monitoring system. Before space of each measuring point is filled, a supporting rod is fixed to a filling space bottom plate through ground anchors, a telescopic rod telescopically supports a filling space top plate, an optical fiber grating sensor group is mounted in the middle of the telescopic rod, and an optical fiber connector is lead out of the tail part of the supporting rod and connected to a mine optical cable through optical fiber, so that an optical grating monitoring signal is transmitted to an optical fiber grating demodulation instrument; and a demodulated signal is transmitted to a computer system, and a paste filler is subjected to real-time online monitoring and analysis process after the space is filled. The system has the advantages as follows: the equipment installation is simple, and the system is suitable for general popularization; underground power supply is not required, and the scene safety is guaranteed; full-optical measurement and optical fiber transmission are adopted, so that influence of electromagnetic interference is effectively avoided; a temperature compensation optical grating is adopted for compensating temperature errors, so that the monitoring accuracy is improved greatly; and the monitoring result can be timely provided, and guidance of scene production and scientific research is facilitated.

Description

technical field [0001] The invention relates to an online monitoring system for mine filling body, in particular to an online monitoring system for coal mine paste filling based on optical fiber grating sensing. Background technique [0002] Filling mining technology is a major innovation in coal mining technology as a solution to coal mining under buildings, under railways, under water bodies and above confined water. Among them, paste filling is an important part of coal mine green mining technology. Coal gangue, fly ash, industrial slag, inferior soil, urban solid waste, etc. near the coal mine are processed on the ground into a toothpaste-like slurry that does not require dehydration. , using filling pumps or gravity pressurization, transported to the underground through pipelines, filling goafs or abscission areas in a timely manner, forming an overlying rock support system mainly composed of paste fillings, and effectively controlling surface subsidence within the allo...

AI Technical Summary

Problems solved by technology

However, since the filling body may be in high temperature, high pressure or water-rich environment underground in the coal mine, and in a closed environment, it is impossible to measure its force and deformation manually, and it can only be measured by equipment; while the current traditional monitoring The equipment is bulky and cannot adapt to the environment of high temperature, high pressure or water, let alone complete the long-term real-time online monitoring task of the filling body

Images