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Method for identifying lithologic interface in front of direct current detection roadway heading face

An identification method and interface technology, which is applied in electric/magnetic detection for well logging records, tunneling, earthwork drilling and mining, etc., can solve the problem of inability to accurately explain the location of low-resistance anomalies and the inability to predict the lithology in front of the tunneling face. Interface and other problems, to achieve the effect of increasing the speed of coal mine excavation, reducing the quantity, and reducing the amount of drilling

Pending Publication Date: 2022-04-22
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0003] Aiming at the defects and insufficiencies in the prior art, the present invention provides a method for identifying the lithology interface in front of the roadway excavation face by direct current detection, so as to solve the problem that the existing advance detection method for coal mine roadway excavation cannot accurately explain the abnormal position of low resistance, The problem of not being able to predict the lithological interface ahead of the face

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  • Method for identifying lithologic interface in front of direct current detection roadway heading face
  • Method for identifying lithologic interface in front of direct current detection roadway heading face
  • Method for identifying lithologic interface in front of direct current detection roadway heading face

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Embodiment 1

[0053] This embodiment provides a DC detection method for identifying the lithology interface in front of the tunneling face, which includes the following steps:

[0054] Step 1, laying out the three-pole advanced detection device:

[0055] Such as figure 2 As shown, the three-pole advanced detection device includes a power supply electrode A, a receiving electrode M and a receiving electrode N, an infinite electrode B, and a direct current meter; The power supply electrode A, the receiving electrode M and the receiving electrode N are arranged in sequence, and the power supply electrode A and the receiving electrodes M and N are arranged along the same straight line parallel to the roadway, and the power supply electrode A and the infinite electrode B are connected to the transmitter of the direct current meter. terminal terminal, the receiving electrodes M and N are connected to the receiving terminal terminal of the direct current meter;

[0056] Specifically, in step 1,...

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Abstract

The invention discloses a method for identifying a lithologic interface in front of a direct-current detection roadway tunneling face, which comprises the following steps of: 1, arranging a three-pole advanced detection device, 2, measuring the power supply current and the receiving potential difference of each measuring point, 3, respectively calculating the spherical shell apparent resistivity of each measuring point in three groups of measuring points, 4, calculating the spherical shell apparent resistivity of each measuring point in the three groups of measuring points, and 5, identifying the lithologic interface in front of the direct-current detection roadway tunneling face. The method comprises the following steps of 1, respectively drawing three groups of spherical shell resistivity curves, 5, carrying out interference suppression and data superposition processing on the three groups of spherical shell resistivity curves, and 6, carrying out lithologic interface identification according to a comprehensive curve. According to the method, the low-resistance abnormal region can be delimited according to the apparent resistivity value of the spherical shell in the apparent resistivity curve of the spherical shell in front of the tunneling surface for lithologic interface identification.

Description

technical field [0001] The invention belongs to the technical field of coal geophysical prospecting, and relates to the identification of a lithology interface in a roadway for direct current detection, and in particular to a method for identifying the lithology interface in front of a roadway excavation face by direct current detection. Background technique [0002] Mine direct current method is a widely used coal mine geophysical monitoring technology. It has been well applied in the monitoring of coal mine water structure and gas anomaly area. However, there are the following problems in actual work. The interpretation method and working conditions are limited. The data often differ greatly from the results of numerical calculations. There are many solutions for a single parameter of apparent resistivity, which leads to more abnormalities and more drilling in coal mines; sometimes abnormalities cannot be found, and even wrong results are explained without further processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/18E21D9/00
CPCG01V3/18E21D9/003
Inventor 王信文张军张典荣王小波张鹏王鹏姚伟华侯彦威
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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