Goaf gas source comprehensive judgment and prediction method

A technology of comprehensive judgment and prediction method, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems of unclear gas origin from specific coal seams, many influencing factors, complex gas sources, etc., to achieve green Mining and utilization, reducing leakage, reducing the effect of greenhouse effect

Active Publication Date: 2017-05-17
ANHUI UNIV OF SCI & TECH +1
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Problems solved by technology

[0003] Through the dynamic analysis of gas sources and predictions in goafs at home and abroad, it can be seen that gas sources in goafs are complex and have many influencing factors, and most of the research work that has been carried out is mainly based on gas concentration investigations and gas flow

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  • Goaf gas source comprehensive judgment and prediction method
  • Goaf gas source comprehensive judgment and prediction method
  • Goaf gas source comprehensive judgment and prediction method

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[0031] The content of the present invention will be described below in conjunction with specific embodiments.

[0032] Such as Figure 1-Figure 11 As shown, the method for comprehensively judging and predicting gas sources in goafs according to the present invention includes the following steps:

[0033] S1: Determine the main coal seam and gas-containing coal seam of the minefield, and sample the main coal seam and gas-containing coal seam;

[0034] S2: Collect gas in the main coal seam and gas-containing coal seam corresponding to the mark in S1 through the desorption experiment, and test the δ value and gas of the methane carbon, hydrogen isotope, ethane carbon isotope and carbon dioxide stable carbon isotope of the desorbed gas sample Component volume content, where the δ value is a thousandth difference between the isotope ratio of the sample and the isotope ratio of the standard sample;

[0035] S3: Establish multiple standard plates, and project the data of the test hydrocarbo...

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Abstract

The invention relates to a goaf gas source comprehensive judgment and prediction method. The method comprises the steps of conducting comparison and analysis on the difference between methane stable carbon-hydrogen isotope, ethane carbon isotope and stable carbon isotope of carbon dioxide in goaf gas and the similar stable isotope in target formation desorption gas, with the combination of concentrations of goaf gushing gas and desorption gas in the coal seam and in the adjacent seam, and through isotope source value calculation, determining goaf gas sources, and forming a set of comprehensive judgment method based on isotope judgment and combined with the gas component analysis. According to the goaf gas source comprehensive judgment and prediction method, gas volume ratio from different end members can be more precisely calculated. By judging and predicting the goaf gas sources, a positive and effective gas extraction technology is formulated, the greenhouse effect due to dissipation of goaf gas to atmosphere is reduced, achievement of gas resource green exploitation and utilization is promoted, and considerable social, economic and environmental benefits are obtained.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a method for comprehensively judging and predicting gas sources in goafs. Background technique [0002] At present, most of the researches on the goaf have studied the gas concentration distribution, gas flow and gushing law of the goaf by using the theory of seepage mechanics and numerical simulation. In terms of mine gas emission prediction research, the calculation methods of gas emission theory in gobs include the separate source calculation method, the estimation of gob gas emission amount based on the change of return air gas emission before and after the collapse of the old roof, and the drawing method. Wait. [0003] Through the dynamic analysis of gas sources and predictions in goafs at home and abroad, it can be seen that gas sources in goafs are complex and have many influencing factors, and most of the research work that has been carried out is mainly based on gas concentr...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/367
Inventor 刘会虎徐宏杰薛俊华兰天贺周伟韩云春任波
Owner ANHUI UNIV OF SCI & TECH
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