An underground reservoir coal pillar dam damage area seepage monitoring device and monitoring method

Abstract

The invention discloses a seepage pressure monitoring device and a monitoring method for a coal pillar dam damage area of ​​an underground reservoir, and belongs to the technical field of rock mass mechanics seepage pressure monitoring. The device includes seepage pressure monitoring pipes, several of which are placed horizontally in the coal pillar dam body and evenly arranged in the flooding affected area; the seepage pressure monitoring pipe is composed of a monitoring section and a cable section; A number of seepage pressure monitoring positions are arranged in the length direction of the monitoring pipe, and the length of the monitoring section is longer than the length of the flooding affected area at the position; a number of seepage pressure monitoring gauges are evenly distributed along the circumference of the seepage pressure monitoring pipe at the seepage pressure monitoring position. The present invention provides protection for each seepage monitoring meter and cables in the pipe body through the setting of the seepage pressure monitoring tube structure, which can adapt to the environment such as mine humidity and corrosion, improves the effective service life of the device, and is convenient for the staff to follow the " Point-line-surface" monitoring data is more intuitive and convenient to construct the seepage pressure situation in the damaged area of ​​the coal pillar dam body itself, making the monitoring data of this device easy to analyze and accurate and effective.

Description

technical field [0001] The invention belongs to the technical field of seepage pressure monitoring of rock mass mechanics, and more specifically relates to a seepage pressure monitoring device and a monitoring method of a coal pillar dam damage area of ​​an underground reservoir. Background technique [0002] Coal mine underground reservoir engineering is an effective way to protect and utilize mine water resources in coal resource mining. The dynamic monitoring and effective control of coal pillar dam body under the environment of long-term water immersion and dynamic and static load superposition becomes the key to the long-term safe operation of coal mine underground reservoir. Among them, The dynamic water pressure seepage characteristics have a great influence on the coal pillar dam that has natural defects (pores, cracks, etc.) and accounts for a large proportion of the reservoir dam. Therefore, the continuous seepage monitoring of the water storage coal pillar dam is a...

AI Technical Summary

Problems solved by technology

[0004] At present, the scope of application of most fiber grating seepage pressure monitoring systems in China is limited to ground construction industries, and is rarely used for monitoring and early warning of coal pillar stability during coal resource mining, and most of the seepage pressure monitoring systems in the construction industry have passed Pouring or pre-burying in designated areas rarely involves post-on-line monitoring of existing engineering structures; in addition, the current seepage pressure monitoring devices mainly have the following problems: (1) Human construction factors lead to loss of monitoring data, (2) The collectable data of the monitoring points are highly discrete; (3) The monitoring points on the same monitoring horizontal line are distributed through their respective optical fiber lines at intervals, and there is a lack of communication between the monitoring points, etc.

[0005] In summary, the traditional fiber grating monitoring device and monitoring data collection methods are relatively limited, and the layout of the monitoring device cannot meet the precise and intelligent online monitoring and data processing of the coal pillar dam in the coupled environment of complex stress and water immersion.

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