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Method for determining water storage coefficient of coal mine underground water reservoir

A technology of underground reservoir and water storage coefficient, which is applied in measurement devices, analysis of suspensions and porous materials, instruments, etc., can solve the problem of lack of accurate and continuous measurement methods of water storage coefficient of underground reservoirs in coal mines, and achieve the effect of continuous monitoring.

Active Publication Date: 2018-06-15
CHINA SHENHUA ENERGY CO LTD +2
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Problems solved by technology

[0006] Based on this, it is necessary to provide a method for measuring the water storage coefficient of coal mine underground reservoirs in view of the technical problem that the existing technology lacks an accurate and continuous measurement method for the water storage coefficient of coal mine underground reservoirs

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  • Method for determining water storage coefficient of coal mine underground water reservoir
  • Method for determining water storage coefficient of coal mine underground water reservoir
  • Method for determining water storage coefficient of coal mine underground water reservoir

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Such as figure 1 Shown is a working flow diagram of a method for determining the water storage coefficient of a coal mine underground reservoir of the present invention, including:

[0043] Step S101 includes: establishing a three-dimensional similarity test model about the mine to be measured, and the three-dimensional similarity test model includes an overlying stratum, an aquifer, an aquifer, an underground reservoir stratum, and a floor stratum arranged sequentially from top to bottom.

[0044] Step S102 includes: performing coal seam excavation processing on the three-dimensional similarity test model.

[0045] Specifically, because the phreatic aquifer above the coal seam mainly has physical and chemical effects on the underlying rock formations (the confined aquifer also has hydraulic fracturing), so the similar simulat...

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Abstract

The invention discloses a method for determining a water storage coefficient of a coal mine underground water reservoir. The method comprises establishing a three-dimensional similarity test model fora mine to be measured, wherein the three-dimensional similarity test model comprises an upper overlying rock layer, an aquifer, an aquifuge, a groundwater reservoir rock layer and a floor rock layerfrom top to bottom, carrying out excavation treatment on a coal seam face of the three-dimensional similarity test model, carrying out water injection and discharge tests on the three-dimensional similarity test model to obtain the discharge amount of water falling each unit height in the groundwater reservoir rock layer, determining the water volume corresponding to the unit height in the groundwater reservoir rock layer, and determining a water storage coefficient corresponding to the unit height through the water volume corresponding to the unit height in the groundwater reservoir rock layer and the water discharge amount of water falling each unit height in the groundwater reservoir rock layer. The method realizes accurate and continuous monitoring of the water storage coefficient of the coal mine underground water reservoir and provides the basic theoretical data for the construction and utilization of the underground water reservoir.

Description

technical field [0001] The invention relates to the related technical field of underground reservoirs in coal mines, in particular to a method for measuring the water storage coefficient of underground reservoirs in coal mines. Background technique [0002] The water storage coefficient refers to the amount of water released (or stored) from a column whose bottom area is one unit and whose height is equal to the thickness of the aquifer when the water head of the aquifer changes by one unit. For an unconfined aquifer, the water released by its water storage coefficient mainly consists of two parts: ①The elastic water volume in the lower part of the aquifer; ②The water volume of the aquifer drained by one unit of head change. [0003] The excavation of the coal seam leads to fractures in the overlying rock. When the height of the caving zone and the fissure zone reaches the aquifer above the coal seam, the aquifer will be destroyed, and the water in the aquifer will flow into...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 庞义辉李全生郝兴辉曹志国张凯
Owner CHINA SHENHUA ENERGY CO LTD
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