CN113309506B - Advanced observation method and device based on electric dipole emission in hole - Google Patents
Advanced observation method and device based on electric dipole emission in hole Download PDFInfo
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- CN113309506B CN113309506B CN202110550837.3A CN202110550837A CN113309506B CN 113309506 B CN113309506 B CN 113309506B CN 202110550837 A CN202110550837 A CN 202110550837A CN 113309506 B CN113309506 B CN 113309506B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention provides an advanced observation method and system based on electric dipole emission in a hole, which are used for carrying out advanced geological analysis on a region to be detected, and preliminarily defining the possible existing range of disaster-causing water-bearing bodies by combining the existing geological data and the condition of an excavated tunnel; selecting a proper position to be drilled into a drill hole, selecting a junction point of the drill hole and a tunnel face as an origin point to establish a frequency domain induced polarization three-dimensional coordinate system, arranging electric dipoles in the hole in an array mode, arranging receiving electrodes in the tunnel face in an array mode, sequentially collecting all the receiving electrodes to obtain apparent resistivity, and performing data processing analysis according to collected apparent resistivity data to obtain the azimuth and the three-dimensional form of the front disaster-causing water-containing body. The invention can overcome the problem of narrow space in the tunnel, and meanwhile, the emission source is placed in the drill hole and is closer to the water-containing body in front of the tunnel face, so that more accurate results can be obtained.
Description
Technical Field
The invention belongs to the technical field of frequency domain induced polarization advanced detection, and particularly relates to an advanced observation method and device based on electric dipole emission in a hole.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The water and mud bursting disasters are common geological disasters in tunnel construction, can threaten the safety of tunnel construction, and often can cause serious economic loss and production safety problems. During the construction of the tunnel, the disaster-causing water-containing body in front of the tunnel face of the tunnel is detected in advance, so that the important effect on avoiding water-bursting and mud-bursting disasters is achieved, the disaster-causing body in front of the tunnel face can be detected in advance by the advance prediction of the tunnel, and the construction safety of the tunnel is guaranteed. The tunnel advanced prediction method plays a role in preventing, controlling and controlling water inrush and mud inrush disasters in the construction period of the tunnel, and electromagnetic methods such as induced polarization, direct current resistivity, transient electromagnetism and the like have high sensitivity to water bodies and are widely used for detecting disaster-causing water-containing bodies causing serious water inrush and mud inrush hazards.
At present, an electromagnetic method is applied to obtain a certain effect on the aspect of advanced water detection of a tunnel, but the traditional advanced prediction is carried out on a tunnel face, the environment of the tunnel face is narrow during tunnel construction, metal such as a steel arch frame near the tunnel face is easy to generate electromagnetic interference, the advanced prediction effect is seriously influenced, a water-containing abnormal body arranged in the deep position of an emission source of the tunnel face is too far away from the water-containing abnormal body, the radiation energy of a detection field source is gradually reduced along with the increase of the distance, the signal-to-noise ratio of a remote received signal is not high, and the deviation of the result is caused.
Disclosure of Invention
The invention aims to solve the problems and provides an advanced observation method and device based on electric dipole emission in a hole.
According to some embodiments, the invention adopts the following technical scheme:
an advanced observation method based on electric dipole emission in a hole comprises the following steps:
A. carrying out advanced geological analysis on the area to be detected, and preliminarily defining the possible existing range of the disaster-causing water-bearing body by combining the existing geological data and the condition of the excavated tunnel;
B. selecting a proper position to drive in a drill hole, selecting a boundary point between the drill hole and a tunnel face as an origin point to establish a frequency domain induced polarization three-dimensional coordinate system, arranging electric dipoles in the hole in an array manner, and arranging receiving electrodes on the tunnel face in an array manner;
C. supplying power to an electric dipole, and sequentially collecting all receiving electrodes to obtain apparent resistivity; after the receiving electrode is collected, the electric dipoles move forwards in sequence, and the electrode collecting step is repeated until the electric dipoles reach the tail end of the drill hole;
D. and according to the collected apparent resistivity data, performing data processing analysis to obtain the azimuth and the three-dimensional form of the front disaster-causing water-containing body.
In an alternative embodiment, in the step B, the z-axis in the frequency domain induced polarization three-dimensional coordinate system is the tunneling direction and is forward along the borehole, the x-axis is perpendicular to the ground, and the y-axis is parallel to the ground.
As an alternative embodiment, in step C, the appropriate excitation frequency and borehole depth are selected according to the distance to be detected.
As an alternative embodiment, in the step D, the least square inversion is performed on the data according to the acquired apparent resistivity data to obtain a three-dimensional image, so as to reflect the orientation and the form of the water-containing low-resistivity body.
An advanced observation system based on electric dipole emission in a hole comprises a motor system, a fixing device, a host and a transmitter, wherein:
the transmitter is used for transmitting signals;
the fixing device is used for fixing the electric dipole placed in the drill hole;
the electrode system comprises a receiving electrode system and an electric dipole system, the receiving electrode system comprises a plurality of receiving electrodes arranged on the face of the palm in an array mode, the electric dipole system comprises a plurality of electric dipoles arranged at intervals, the electric dipoles are connected through cables, and the electric dipole system is connected with a transmitter;
the host is connected with the transmitter and the receiving electrode system through leads and is configured to control the action of the transmitter, and data processing and analysis are carried out according to the collected apparent resistivity data to obtain the direction and the three-dimensional form of the front disaster-causing water-containing body.
As an alternative embodiment, the host includes: the device comprises a control module, a data acquisition module, a data processing module and a data storage module, wherein the control module is used for controlling the frequency and the magnitude of the transmitting current of a transmitter and the acquisition mode and the sequence of a receiving electrode; the data acquisition module is connected with the receiving electrode and is used for acquiring apparent resistivity; the data processing module is configured to invert the acquired apparent resistivity, draw a three-dimensional image and calibrate a possible direction of the disaster-causing water-containing body; the data storage module is used for storing the apparent resistivity data and the generated three-dimensional schematic diagram.
Alternatively, each electric dipole is connected to a transmitter in sequence and excited sequentially.
As an alternative embodiment, the electric dipoles are equally spaced.
In an alternative embodiment, the receiving electrode is a stainless steel electrode.
As an alternative, the securing means is a mechanical ejection means.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a novel frequency domain induced polarization advanced water exploration method and device for in-hole electric dipole emission, aiming at the problem that disaster-causing water-containing bodies in front of a tunnel seriously affect the safety of the tunnel in the construction period. Under the condition that the space of the tunnel face is limited, the electric dipole is placed in the drill hole, so that the electric dipole is closer to a water-containing body, and a more accurate result can be obtained.
The invention provides a frequency domain induced polarization advanced water detection method emitted by an electric dipole in a hole, which can realize automatic installation of the electric dipole and intelligent acquisition, processing and identification of data. The electric dipole cable is arranged in the drill hole, electromagnetic interference behind the tunnel face is avoided, meanwhile, the device can transmit currents with different frequencies and magnitudes through the host, the electric dipole is closer to an abnormal body, the position and the three-dimensional form of disaster-causing water-containing bodies in a detection area can be reflected to the maximum degree, and the electric dipole cable has important significance for safety guarantee in the tunnel construction period.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a flow chart of an embodiment of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention;
wherein, 1, receiving electrode system; 2. an electric dipole; 3. a palm surface; 4. drilling; 5. a transmitter; 6. a host.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention aims to provide a tunnel frequency domain induced polarization method for electric dipole emission in a hole and an electric dipole emission tunnel frequency domain induced polarization advanced water detection device based on drilling.
Firstly, a method for detecting water in advance by induced polarization of tunnel frequency domain emitted by an electric dipole in a hole is introduced, the flow of which is shown in figure 1, and the method comprises the following steps:
A. and (4) geological analysis, namely analyzing the geological conditions of the area to be detected, including the historical natural conditions of the area and the revealed rock stratum information of the excavated tunnel.
B. After a key detection area is defined, a proper drilling position is selected and a drill hole is punched. An electric dipole cable is placed within the borehole. And establishing an induced polarization three-dimensional coordinate system by taking the center of the tunnel face as a zero point, wherein the z axis is a drilled hole, the x axis is vertical to the ground, the y axis is parallel to the ground, and the receiving electrode points are arranged on the tunnel face in a matrix manner.
C. And selecting a proper frequency as an excitation source, sending current signals to the electric dipole cable by a transmitter, and sequentially collecting the current signals by the receiving electrodes from top left to bottom right.
D. After the primary collection is finished, the power supply electrodes in the electric dipole cables synchronously move forwards, and the receiving electrodes continue to collect in sequence until the power supply electrodes move to the tail end of the drill hole.
E. And after all data acquisition is finished, performing data processing by using a least square inversion method to obtain the direction and the three-dimensional form of the front disaster-causing water-containing body.
A tunnel frequency domain induced polarization advanced observation device emitted by an electric dipole in a hole is shown in a schematic diagram of fig. 2 and comprises an electrode system, a fixing device, a host, a transmitter and other components, wherein the transmitter in the device can emit alternating currents with different frequencies and different sizes.
The fixing device in the device is a mechanical ejection device used for fixing the electric dipole placed in the drill hole.
The electrode system in the device comprises a receiving electrode system and an electric dipole cable. The receiving electrodes are arranged in an array on the tunnel face, and the electric dipole is a long cable with a plurality of electrodes at equal intervals. During detection, the electric dipole cable is connected to the transmitter and sequentially excited.
In the device, a host is connected with a transmitter, a receiving electrode system and an electric dipole cable by using conducting wires. The host computer includes: the device comprises a control module, a data acquisition module, a data processing module and a data storage module. The control module is used for controlling the frequency and the size of the transmitting current of the transmitter and the acquisition mode and the sequence of the receiving electrodes; the data acquisition module is connected with the receiving electrode to realize the function of acquiring apparent resistivity; the data processing module can invert the acquired apparent resistivity, draw a three-dimensional image and intelligently calibrate the possible orientation of the disaster-causing water-containing body; the data storage module is capable of storing the apparent resistivity data and the generated three-dimensional schematic.
The use method of the device comprises the following steps:
A. selecting a drilling hole position to drive into a drilling hole according to the prior geological condition;
B. placing an electric dipole cable in the drill hole, placing a receiving electrode system on the tunnel face, connecting a host with a transmitter and the receiving electrode, and fixing an electric dipole in the drill hole and connecting the electric dipole cable with the transmitter;
C. the host controls the transmitter to send out current with proper frequency and magnitude;
D. transmitting an electric dipole, and sequentially measuring apparent resistivity data by a receiving electrode;
E. after all receiving electrodes measure primary data, the host controls the power supply point to advance along the electric dipole cable, and the receiving electrodes continue to collect the data;
F. after the acquisition is finished, processing and analyzing are carried out according to the resistivity data, a three-dimensional image is drawn (in the embodiment, the data can be processed by a least square method), and the direction and the three-dimensional form of the disaster-causing water-bearing body are calibrated.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. An advanced observation method based on electric dipole emission in a hole is characterized in that: the method comprises the following steps:
A. carrying out advanced geological analysis on an area to be detected, and preliminarily defining the possible existing range of the disaster-causing water-containing body by combining the existing geological data and the condition of the excavated tunnel;
B. selecting a proper position to drive in a drill hole, selecting a boundary point between the drill hole and a tunnel face as an origin point to establish a frequency domain induced polarization three-dimensional coordinate system, arranging electric dipoles in the hole in an array manner, and arranging receiving electrodes on the tunnel face in an array manner; all electric dipoles are arranged at equal intervals;
C. supplying power to an electric dipole, and sequentially collecting all receiving electrodes to obtain apparent resistivity; after the receiving electrode finishes collecting, the electric dipole moves forwards in sequence, and the electrode collecting step is repeated until the electric dipole reaches the tail end of the drill hole;
D. according to the collected apparent resistivity data, carrying out data processing analysis to obtain the azimuth and the three-dimensional form of the front disaster-causing water-bearing body;
all electric dipoles are connected to the transmitter in sequence and are excited in sequence;
the receiving electrodes are sequentially acquired from the upper left to the lower right.
2. The advanced observation method based on electric dipole emission in the hole as claimed in claim 1, wherein: in the step B, the z axis in the frequency domain induced polarization three-dimensional coordinate system is forward along a drilled hole in the tunneling direction, the x axis is perpendicular to the ground, and the y axis is parallel to the ground.
3. The advanced observation method based on electric dipole emission in the hole as claimed in claim 1, wherein: and in the step C, selecting proper excitation frequency and drilling depth according to the distance to be detected.
4. The advanced observation method based on electric dipole emission in the hole as claimed in claim 1, wherein: and D, performing least square inversion on the data according to the acquired apparent resistivity data to obtain a three-dimensional image, and reflecting the orientation and the form of the water-containing low-resistance body.
5. An advanced observation system based on electric dipole emission in a hole is characterized in that: including electrode system, fixing device, host computer and transmitter, wherein:
the transmitter is used for transmitting signals;
the fixing device is used for fixing the electric dipole placed in the drill hole; all electric dipoles are arranged at equal intervals;
the electrode system comprises a receiving electrode system and an electric dipole system, the receiving electrode system comprises a plurality of receiving electrodes arranged on the face of the palm in an array mode, the electric dipole system comprises a plurality of electric dipoles arranged at intervals, the electric dipoles are connected through cables, and the electric dipole system is connected with a transmitter;
the host is connected with the transmitter and the receiving electrode system through leads and is configured to control the action of the transmitter, and data processing and analysis are carried out according to the collected apparent resistivity data to obtain the direction and the three-dimensional form of the front disaster-causing water-containing body;
all electric dipoles are connected to the transmitter in sequence and are excited in sequence;
the receiving electrodes are sequentially acquired from the upper left to the lower right.
6. The advanced observation system based on electric dipole emission in the hole of claim 5, wherein: the host includes: the device comprises a control module, a data acquisition module, a data processing module and a data storage module, wherein the control module is used for controlling the frequency and the magnitude of the transmitting current of a transmitter and the acquisition mode and the sequence of a receiving electrode; the data acquisition module is connected with the receiving electrode and is used for acquiring apparent resistivity; the data processing module is configured to invert the acquired apparent resistivity, draw a three-dimensional image and calibrate a possible direction of the disaster-causing water-containing body; the data storage module is used for storing the apparent resistivity data and the generated three-dimensional schematic diagram.
7. The advanced observation system based on electric dipole emission in the hole of claim 5, wherein: the receiving electrode is a stainless steel electrode.
8. The advanced observation system based on electric dipole emission in a hole of claim 5, wherein: the fixing device is a mechanical ejection device.
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| CN202110550837.3A CN113309506B (en) | 2021-05-18 | 2021-05-18 | Advanced observation method and device based on electric dipole emission in hole |
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| CN117270062B (en) * | 2023-11-22 | 2024-02-09 | 山东大学 | TBM induced polarization advanced water detection device and method based on annular electrode emission |
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