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Method for obtaining permeability coefficients of coal mine roof through water draining experiment

A technology of water discharge test and permeability coefficient, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of manpower, material resources, large differences in water volume, and result errors, and achieve the effect of improving accuracy

Inactive Publication Date: 2017-03-08
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

[0004] In the process of mine water discharge test, it is often encountered under the background of water drainage in other coal mining faces, but previous researchers did not consider the influence of a large number of drilling water drainage in other coal mining faces on the interference of water discharge tests, so the calculated There is a certain error in the parameter value
[0005] The number of water-discharging drilling holes on the coal mining face is relatively large, and the water volume varies greatly. It takes manpower and material resources to count, and there are large errors in the calculated results.

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  • Method for obtaining permeability coefficients of coal mine roof through water draining experiment
  • Method for obtaining permeability coefficients of coal mine roof through water draining experiment
  • Method for obtaining permeability coefficients of coal mine roof through water draining experiment

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] Figure 1 to Figure 6 Some embodiments according to the invention are shown.

[0029] Such as figure 1 Shown, the method steps for obtaining the permeability coefficient method for the coal mine roof water discharge test of the present invention are:

[0030] S11. According to the hydrogeological conditions of the mining area, set the water discharge holes required for the water discharge test on the roof and select the observation holes;

[0031] S13. Collect the observation data of the observation hole under the condition of drilling water in the working face within a predetermined time before the water discharge test, that is, time-water level data;

[0032] S15. Open the water di...

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Abstract

The invention discloses a method for obtaining permeability coefficients of a coal mine roof through a water draining experiment. The method comprises the following steps: arranging a water draining hole in the roof for the water draining experiment according to the hydrogeological condition of a mine area, and selecting an observing hole; collecting the observing data, namely, time-water level data, of the observing hole within the preset time before the water draining experiment under the condition that a hole is drilled for water draining in a working surface; opening the water draining hole in the water draining experiment; starting draining water based on some constant flow rate, and synchronously observing the water level of the observing hole so as to obtain the time-water level data of the observing hole in the water draining process; subtracting the preset drawdown caused by hole drilling in the working surface by the total drawdown to obtain the drawdown, independently caused by the water draining hole in the single-hole water draining experiment, of the observing hole; and calculating the permeability coefficients of a water-bearing layer according to the drawdown, relative to the observing hole, of the water draining hole in the single-hole water draining experiment. With the adoption of the method, the interference of water draining in other working surfaces to the water draining experiment can be removed, and the accuracy of hydrogeological parameters of a mine can be improved.

Description

technical field [0001] The invention relates to the field of mine hydrogeology, in particular to a new method for carrying out a water release test to obtain parameters of an aquifer under the interference of a large number of borehole drainage water on a working face during the coal mine mining process. Background technique [0002] Acquisition of aquifer parameters is an important content in hydrogeological work. In the process of mining, the method of water discharge test is often used to obtain aquifer parameter values, and then evaluate the hydrogeological conditions of the aquifer. [0003] At the same time, the water discharge test is also one of the effective methods to detect the hydrogeological conditions of the mine, and it is an important supplementary exploration method for mining. The Jurassic coalfields in the Ordos Basin of my country are mainly threatened by roof sandstone water. The roof water test method is used to find out the hydrogeological conditions o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 汪迁迁黎志豪许光泉高加林蔡有京杨婷婷
Owner ANHUI UNIV OF SCI & TECH
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