On-line monitoring system and method for filling body deformation based on fiber Bragg grating sensing

Abstract

The invention discloses a filling body deformation online monitoring system and a monitoring method based on fiber bragg grating sensing, and relates to the technical field of mine filling body monitoring. The device comprises an extension part, a fixing device, a filling body transverse displacement measuring device based on fiber bragg grating sensing, a filling body vertical displacement measuring device based on fiber bragg grating sensing, a steel pipe, an extension line, a baffle, a coupler, an optical fiber, a mining optical cable, a fiber bragg grating demodulator and a computer system, the filling body transverse displacement measuring device based on fiber bragg grating sensing is arranged in the horizontal direction, and the filling body vertical displacement measuring device based on fiber bragg grating sensing is arranged in the vertical direction. The lower portion of the filling body vertical displacement measuring device based on fiber bragg grating sensing is fixed through a fixing device, an extension part is installed on the upper portion of the filling body vertical displacement measuring device, and the top of the extension part makes contact with a top plate of a to-be-filled area. According to the system, real-time and on-line remote monitoring of transverse deformation and vertical deformation of the filling body can be realized.

Description

technical field [0001] The invention relates to the technical field of mine filling body monitoring, in particular to an on-line monitoring system and monitoring method for filling body deformation based on fiber grating sensing. Background technique [0002] Filling mining refers to the use of filling materials to fill the goaf after underground coal resources are mined. The filling body can effectively support the overlying rock stratum, and the deformation value of the ground surface is controlled within the allowable deformation range of the building (structure). Safe recovery of coal resources under mines, and at the same time protect the ecological environment and groundwater resources in the mining area. Filling mining is an important technical method for mining "three-down" coal pressing in my country. In recent years, with the continuous improvement of environmental protection requirements in China, filling mining technology has been more and more widely used in my ...

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Problems solved by technology

[0004] The patents with the notification numbers CN202467929U and CN103528731A respectively disclose an on-line monitoring system for filling body performance and an online monitoring system for coal mine paste filling based on fiber grating sensing, but they can only realize the vertical deformation and impact of the filling body. monitoring force, but cannot monitor the lateral deformation of the filling body

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