Coal mine old goaf water inrush monitoring and judging method

A determination method and technology for old empty areas, which are applied in the fields of instruments, electrical digital data processing, geometric CAD, etc., can solve the problems of difficulty in determining the exact location of water accumulation in old empty areas, and insufficient monitoring and early warning methods.

Pending Publication Date: 2022-04-05
DATONG COAL MINE GRP
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Problems solved by technology

[0004] In order to solve the problems that the accurate location of water accumulation in the old empty area is difficult to determine and the monitoring and ea

Method used

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  • Coal mine old goaf water inrush monitoring and judging method
  • Coal mine old goaf water inrush monitoring and judging method
  • Coal mine old goaf water inrush monitoring and judging method

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with specific examples.

[0054] A method for monitoring and judging water inrush in an old empty area of ​​a coal mine, comprising the following steps:

[0055] 1) Mechanics model and criterion for shear failure of effective water-resisting layer:

[0056] In the case of horizontal or near-horizontal conditions, the effective water-resisting layer under the old void area is simplified into a thin plate supported by four sides and subjected to uniform load, such as figure 2 Shown:

[0057] The upper part of the thin plate is subjected to the self-weight stress q of the upper rock mass 1 and the water pressure p of the old goaf, the lower part of the slab is supported by the coal seam fracture zone below q 2 ; For the fixed support around the uniform load q = p + q 1 +γh-q 2 ;

[0058] According to the elastic-plastic thin plate theory, the deflection function of the mid-surface of the effective ...

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Abstract

The invention discloses a coal mine old goaf water inrush monitoring and judging method, and relates to the field of coal mine old goaf water disaster monitoring. Due to the influence of mining, a plastic failure area, namely a top plate water flowing fissure zone and a bottom plate failure zone (the depth is marked as h1) is developed in a certain range of a top plate and a bottom plate of the old goaf; when a finished rock stratum (an effective water-resisting layer, the thickness of which is recorded as h) between a roof water-guiding fissure zone (the height is recorded as h2) generated during mining of a coal seam below an old goaf and a bottom plate failure zone of an overlying old goaf is thin, under the action of an overlying rock mass and the water pressure of the old goaf, the effective water-resisting layer possibly generates plastic failure, a water-guiding channel is formed, and the water-guiding fissure zone is prevented from falling off. Therefore, accumulated water in the top old goaf enters the mining working face of the lower coal seam to cause a water inrush accident. The effective water-resisting layer of the roof old goaf may be subjected to shear failure or tension failure, so that a comprehensive criterion is formulated, whether the risk of water inrush exists or not can be visually seen, and precursor information of water inrush can be reflected.

Description

technical field [0001] The invention relates to the field of monitoring water hazards in old goaf areas of coal mines, in particular to a method for monitoring and judging water inrush in old goaf areas of coal mines. Background technique [0002] According to the statistics of the State Administration of Work Safety, coal mine water hazards are second only to gas explosions in major accidents in coal mines. Water damage and mine disasters not only easily cause heavy casualties of underground workers, but also are the most prominent among coal mine disaster accidents in terms of the severity of economic losses, the difficulty of accident rescue and rescue, and the time required to resume mine production. Among these water damage accidents, water damage in the old empty area accounts for a large proportion. According to incomplete statistics, more than 90% of mine vicious water accidents are caused by the existence of old empty water. The water inrush in Laokong has the cha...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F30/17G06F119/14
Inventor 郭金刚王存权赵晨德宋金旺纪润清刘宇
Owner DATONG COAL MINE GRP
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