A method for measuring and controlling water accumulation in goafs of coal mines

A measurement and control method and goaf technology, applied in mining equipment, mining equipment, earthwork drilling and mining, etc., can solve the problems of not considering the amount of accumulated water in the excavation roadway, the amount of accumulated water, and the hidden dangers of the old goaf, so as to improve Safety, ensuring efficient production, good guiding effects

Active Publication Date: 2018-05-25
HUAINAN MINING IND GRP
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Problems solved by technology

[0008] However, this formula itself has flaws. It only calculates part of the accumulated water space, without considering the accumulated water volume of the excavated roadway, and has not obtained the complete accumulated water volume. This has caused a great hidden danger in the old empty area.

Method used

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  • A method for measuring and controlling water accumulation in goafs of coal mines
  • A method for measuring and controlling water accumulation in goafs of coal mines
  • A method for measuring and controlling water accumulation in goafs of coal mines

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Embodiment 1

[0034] Such as figure 2 and image 3 as shown, figure 2 It means that in the prior art, the ponding space method only calculates figure 2 Part of the water volume of "①" in the figure, and the water volume of "②" in the figure is undercounted (the water volume of the parallelogram); image 3 It was found by computational deduction that figure 2 The less calculated "②" amount of water is actually equal to image 3 The accumulated water volume "②" (rectangular water volume) of the middle roadway. figure 2 and image 3 Actually the same goaf.

[0035] figure 2 The area of ​​the parallelogram "② 左 ", S② 左 =(H 1 / sinα)*(D*sinα)=H 1 *D, image 3 The rectangular area of ​​"② 右 ", S② 右 =H 1 *D is equal, where, H 1 、H 2 Represents the head height m of ponding water, D represents the roadway width m of the down channel 1, K represents the water filling coefficient of the goaf, K 0 represents the water filling coefficient of the excavation roadway, figure 2 and ...

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Abstract

The invention discloses a method for measuring and controlling a water accumulating volume of a coal mine goaf. The water accumulating trend length L of the goaf and a coal bed pitch alpha are measured; water accumulating water head heights H1 and H2 and a lower crossheading roadway width D are measured; a water accumulating space of the goaf is seen as a triangular pyramid model, and then a water accumulating total Q of the goaf is obtained according to the equation that Q= + water accumulating amount of a tunneling roadway. The water accumulating amount of the tunneling roadway is fully considered; through the comparison between the measurement water release amount and the actual water release amount, the measurement and controlling method conforms to lithology combination characteristics of a Xieqiao mine 13-1 coal bed roof, has good guiding effects on water accumulating amount prediction of the mine 13-1 coal bed goaf, and can greatly improve mine safety and guarantee efficient production.

Description

technical field [0001] The invention relates to a method for predicting the amount of accumulated water in the old goaf of a coal mine, in particular to a method for measuring and controlling the amount of accumulated water in the goaf of the coal mine. Background technique [0002] In the process of coal mine production, the water damage accidents caused by the accumulation of water in the old empty area account for about 30% of the coal mine water damage accidents. Although there are not many well flooding accidents, they often cause production stoppages or personal casualties at the working face, which seriously affects the safety of coal mine production and the economy. Benefits have a greater impact. Correctly predicting the amount of accumulated water in the old goaf is a prerequisite for the safe exploration and release of the old empty water in coal mines. After years of investigation, analysis and research on the accumulated water in the goaf, a set of methods suita...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00
CPCE21F17/00
Inventor 张海涛张延喜张刚
Owner HUAINAN MINING IND GRP
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