Method for constructing coal mine transparent working surface by using borehole radar

A technology of drilling radar and working face, which is applied in the field of geophysical exploration, can solve the problems of difficult instrument development and lack of attention, and achieve the effects of fast data processing and interpretation, fast construction, and short drilling

Pending Publication Date: 2022-02-25
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Application Information

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Problems solved by technology

[0003] At present, detection methods for transparent working faces include ground 3D seismic, working face electromagnetic wave perspective, working face channel wave tomography, and downhole drilling detection well...

Method used

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  • Method for constructing coal mine transparent working surface by using borehole radar
  • Method for constructing coal mine transparent working surface by using borehole radar
  • Method for constructing coal mine transparent working surface by using borehole radar

Examples

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Embodiment

[0049] This embodiment provides a method of using borehole radar to construct a transparent working face in a coal mine, such as figure 1 As shown, the method includes the following steps:

[0050] Step S1, data collection of the target area:

[0051] Collect data on the mining area and the mining face, which includes the length L of the mining face k , the width of the mining face W k , the height H of the mining face k and mining coal seam thickness H c ;

[0052] The plan of the mining face is as follows: figure 2 As shown, the section diagram of the mining working face is shown in image 3 shown.

[0053] Step S2, designing the number, quantity and opening points of drilling groups;

[0054] The length of each borehole is l s , in order to ensure the rapid construction of geological bodies during mining, l s Requirements to meet 10ms z , N z Satisfy the following formula:

[0055] N z = L k / l s ;

[0056] According to the width W of the mining face k , e...

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Abstract

The invention provides a method for constructing a coal mine transparent working surface by using a borehole radar. The method comprises the following steps: collecting data of a target area; designing the group number, the quantity and the tapping points of drill holes; carrying out borehole radar measurement: measuring an actual distance between a hole opening position and a top and bottom plate interface; calculating the in-situ dielectric constant of a coal seam; carrying out borehole radar data depth and time correction processing; carrying out borehole radar data noise elimination processing; respectively tracking and reconstructing events of a top plate and a bottom plate by using an orifice positioning method; carrying out top and bottom plate event offset imaging; merging the data after the offset of the top plate and the bottom plate; preprocessing drilling hole track measurement data; calculating a three-dimensional space track of the drilling hole; performing linear interpolation on the drilling hole track until the depth sampling interval is consistent with the depth sampling interval of the borehole radar; calculating the spatial positions of the top and bottom plates in combination with the drilling hole track to form a single-hole top and bottom plate spatial position data set; and combining information of a plurality of drilling holes to form a geologic body three-dimensional data body in front of the head-on.

Description

technical field [0001] The invention belongs to the technical field of geophysical exploration and relates to coal mines, in particular to a method for constructing a transparent working face of coal mines by using drilling radar. Background technique [0002] With the development of intelligent mining technology in coal mines, it is required to build transparent working faces in underground coal mines to provide accurate geological models for intelligent mining. [0003] At present, detection methods for transparent working faces include ground 3D seismic, working face electromagnetic wave perspective, working face channel wave tomography, and downhole drilling detection wells, etc. Borehole radar has high detection accuracy and a larger detection radius than logging methods. It is difficult and has not been paid attention to in the construction of transparent working faces in coal mines. Contents of the invention [0004] In view of the deficiencies in the prior art, th...

Claims

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Application Information

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IPC IPC(8): G01V3/30G01V3/38
CPCG01V3/30G01V3/38
Inventor 蒋必辞李萍李刚刘文明范涛吴国庆余俊辉田小超
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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