Underground reservoir coal pillar dam body damage area osmotic pressure monitoring device and monitoring method

Abstract

The invention discloses an underground reservoir coal pillar dam body damage area osmotic pressure monitoring device and monitoring method, and belongs to the technical field of rock mass mechanics osmotic pressure monitoring. The device comprises a plurality of osmotic pressure monitoring pipes which are horizontally arranged in a coal pillar dam body and are uniformly arranged in a water immersion influence area; the osmotic pressure monitoring pipe is composed of a monitoring section and a cable section; a plurality of osmotic pressure monitoring positions are arranged in the monitoring section along the length direction of the osmotic pressure monitoring pipe, wherein the length of the monitoring section is greater than that of the water immersion influence area at the position; and a plurality of osmotic pressure monitoring meters are uniformly distributed at the osmotic pressure monitoring position along the circumferential direction of the osmotic pressure monitoring pipe. Through the arrangement of the osmotic pressure monitoring pipe structure, each osmotic pressure monitoring meter and the cable in the pipe body are protected, the device can adapt to humid and corrosive environments of mines and the like, and the effective service life of the device is prolonged; and a worker can more intuitively and conveniently construct the osmotic pressure condition at the damage area of the coal pillar dam body according to point-line-surface monitoring data, and the monitoring data of the device is convenient to analyze, 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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