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Method for detecting deep fracture geology through induced polarization composite frequency

A composite frequency and geological technology, applied in radio wave measurement systems, measurement devices, electromagnetic/magnetic exploration, etc., can solve problems such as affecting the construction process, affecting the detection effect, and expensive seismic exploration.

Pending Publication Date: 2021-01-22
高军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, projects such as developing tunnels and excavating coal mines may face the situation of underground fracture geology, which seriously affects the construction process and even endangers the safety of construction workers.
There are many ways to detect geology. For example, the application of direct current method is suitable for working under flat terrain conditions, and it is not easy to carry out in mountainous areas. In places where the industrial current is large in the living area, factory and mining area, the direct current method is affected by electromagnetic coupling. The electromagnetic method will be affected by the deep stratum when detecting the underground goaf in the shallow stratum, which will affect the detection effect. In recent years, people have begun to try to use the seismic prospecting method to detect, but the cost of seismic prospecting is extremely expensive, and The application area is relatively limited, and the fault layer is easy to collapse, which limits the application of seismic exploration

Method used

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  • Method for detecting deep fracture geology through induced polarization composite frequency
  • Method for detecting deep fracture geology through induced polarization composite frequency
  • Method for detecting deep fracture geology through induced polarization composite frequency

Examples

Experimental program
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Effect test

Embodiment 1

[0101] The present invention provides a geological method for detecting deep and thick fractures with combined IP frequency, as shown in the attached figure 1 And attached figure 2 As shown, it is characterized in that it includes:

[0102] Step 100: pre-install the power supply electrodes on the detection line in the tunnel, and use the dual-frequency IP detection device to determine the geophysical data and calibration values ​​between the power supply electrodes; wherein,

[0103] The power supply electrodes include A electrodes and B electrodes;

[0104] The detection lines include east line and west line; as attached figure 2 As shown in the middle gradient arrangement diagram, the gap value between the east line and the west line is controlled at about 50 meters, and the distance between the east line and the west line should not be too close. The distance of the line should not be too long, otherwise the continuous surface of the goaf will not be obtained. Both the...

Embodiment 2

[0112] The present invention provides an embodiment, as attached figure 1 as shown,

[0113] The pre-installation of power supply electrodes on the detection line in the tunnel, and the use of dual-frequency IP detection devices to determine the geophysical data and calibration values ​​between the power supply electrodes include:

[0114] Determine the detection position in the tunnel and determine the detection line; select the detection position first, and the detection position can be selected in the sunken area that is difficult to detect with ordinary detection methods, because compared with flat areas, the sunken area that is difficult to detect is more purposeful for practical detection , when selecting the detection location, the water-filled goaf should be avoided, so as to reduce the influence on the dual-frequency IP method;

[0115] Install A electrode and B electrode detection circuit respectively on the east line and west line of detection circuit and obtain th...

Embodiment 3

[0124] The present invention provides an embodiment, as attached figure 1 as shown

[0125] According to the dual-frequency combined current, determining the apparent amplitude frequency and apparent resistivity of the tunnel geology, including:

[0126] The dual-frequency combined current is delivered to the ground surface of the tunnel through the microcomputer-induced electrical instrument transmitter, and the high-frequency potential information and low-frequency potential information of the ground surface are obtained through the microcomputer-induced electrical instrument receiver;

[0127] determining the potential difference information of the tunnel geology according to the high-frequency potential information and the low-frequency potential information;

[0128] Process the potential difference information through the calibration value of the big data center to determine the processed data;

[0129] Based on the processed data, the apparent amplitude frequency and ...

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Abstract

The invention discloses a method for detecting deep fracture geology through induced polarization composite frequency, and the method comprises the steps: installing power supply electrodes on a detection line in a tunnel in advance, and determining geological and physical data and a calibration value between the power supply electrodes through a double-frequency induced polarization detection device; transmitting the geological physical data and the calibration value to a big data center, generating a profile map, and determining a geological state; transmitting the profile map to simulationequipment, and constructing a simulation tunnel geological model according to the state geological condition; and optimizing the tunnel geological model through the simulation equipment, and determining fracture information of tunnel geology. The method for detecting the deep fracture geology through the induced polarization composite frequency has the advantages that simulation modeling is conducted on the detected geology through the whole method, construction is convenient, the requirement for the terrain is not high, the induced polarization device is light, rapid and flexible, stable andhigh-precision observation data are provided, and the fracture situation of the geology is determined through simulation modeling.

Description

technical field [0001] The invention relates to the technical field of geological detection, in particular to a geological method for detecting deep and thick fractures with IP composite frequency. [0002] Fracture geology: refers to the artificial or natural geological movement below the surface that causes the main fault plane and the broken rock blocks on both sides, as well as several secondary faults or rupture surfaces. If it is necessary to dig tunnels or mine ore for mine geology, it is necessary to detect fault geology , to avoid collapse and subsidence of the fault layer. Background technique [0003] At present, projects such as developing tunnels and excavating coal mines may face the situation of underground fracture geology, which seriously affects the construction process and even endangers the safety of construction workers. There are many ways to detect geology. For example, the application of direct current method is suitable for working under flat terrai...

Claims

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Application Information

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IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/08G01V3/38
Inventor 王岭高军乔保卫张松陈志明谭发刚吴德兴黄正凯张旭东罗红明杨立云项小珍陈敏汤宇刘德安王圣彭学军杨文国谢晓波李行利
Owner 高军
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