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Coal mine full-water goaf detection method

A detection method and gob technology, applied in the direction of measuring devices, geophysical measurement, radio wave measurement systems, etc., can solve the problems of excessive sampling interval, sparse wave field sampling time, affecting the resolution of wave field transformation, etc., to achieve Explanation of direct, broad application prospect, effect of improving reliability

Active Publication Date: 2012-06-27
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Cai J proposed an optimization method to determine parameters in the sense of minimum mean square error. In the previous wave field transformation methods, due to the small number of time gates used, the wave field sampling time was sparse and the sampling interval was too large. It affects the resolution of the wavefield transformation

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  • Coal mine full-water goaf detection method
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  • Coal mine full-water goaf detection method

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] A method for detecting coal mine water-filled goafs provided by the present invention comprises the following steps, such as figure 1 :

[0056] [101] Collect the transient electromagnetic method data on the ground in the goaf, and obtain the voltage decay curve and the magnetic field curve corresponding to the voltage decay curve.

[0057] 【102】Establish the equation between the transient electromagnetic field and the virtual wave field.

[0058] Lee et al. believe that there is a corresponding mathematical transformation formula for each component of the late transient electromagnetic field and the virtual wave field,

[0059] f ( x , y , ...

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Abstract

The invention discloses a coal mine full-water goaf detection method which comprises the steps of: acquiring transient electromagnetic method data on the ground of a goaf, obtaining a voltage attenuation curve of a transient electromagnetic method of the goaf; transforming the voltage attenuation curve into a magnetic field curve, establishing an equation between a transient electric magnetic field and a virtual wave field; and carrying out regularization calculation on the obtained equation to obtain the virtual wave field, establishing a transient electromagnetic method kinematics section, and directly explaining the coal mine water-containing goaf according to the transient electromagnetic method kinematics section. Calculation of a theoretical model and an actual measurement information processing result of some goaf in Shanxi prove that the coal mine full-water goaf detection method is effective and practical for target body imaging, and has a visual and reliable explanation result. A detection result is well verified through drilling.

Description

technical field [0001] The invention relates to the field of coal mine detection, in particular to a method for detecting virtual wavelet references by using transient electromagnetic method observation data to detect coal mine goafs. Background technique [0002] China is the world's largest coal producer and consumer. With the rapid development of the national economy, the demand for energy will become higher and higher. The continuous mining of coal resources for many years has undoubtedly made an important contribution to the energy security of the country's economic construction. At the same time, it has also brought a series of major problems such as resource depletion, surface subsidence, frequent geological disasters, water resource destruction and increasingly severe ecological environment. The large-scale development and utilization of mineral resources has created huge material wealth for human beings. The earth changes the material and energy cycle of the mine e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
Inventor 薛国强李貅郭文波
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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