CN213658990U - 5G + CMFT-R time domain electromagnetic field exploration system - Google Patents
5G + CMFT-R time domain electromagnetic field exploration system Download PDFInfo
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- CN213658990U CN213658990U CN202021969680.5U CN202021969680U CN213658990U CN 213658990 U CN213658990 U CN 213658990U CN 202021969680 U CN202021969680 U CN 202021969680U CN 213658990 U CN213658990 U CN 213658990U
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Abstract
The utility model discloses a 5G + CMFT-R time domain electromagnetic field exploration system and method is applicable to the detection and the prevention and cure of roof water damage among the coal mining process. In view of the characteristics of thick top plate of a coal seam, complex ground surface and the like in northwest China, aiming at the defects of the existing ground and underground transient electromagnetic detection method, the technology adopts a mode that a transmitting coil surrounds a coal face to transmit a primary electromagnetic field, and is connected with an underground signal transmitting and ground signal collecting system to complete the same-frequency synchronization of receiving and transmitting; and receiving the secondary electromagnetic field point by the ground by using receiving coils according to the arrangement of the measuring network. And converting the acquired current and voltage data into apparent resistivity data so as to obtain apparent resistivity images of different layers and perform abnormal interpretation. The technology can give full play to the detection advantages of the transient electromagnetic method in the northwest coal mine area, obtain a detection result with higher precision at lower cost, and accurately judge the spatial position of the coal bed roof water-rich area, thereby providing reliable technical parameters for the safe and efficient production of coal mines.
Description
Technical Field
The utility model relates to a coal mining water damage is surveyed and is prevented and control technical field, specifically is 5G + CMFT-R time domain electromagnetic field exploration system.
Background
The number of coal seams in the early Jurassic coal field in the northwest of China is large, the thickness is large, resources are rich, in recent years, the weak water-rich soft rock water-sand mixed intermittent water burst accidents in part of the coal fields are frequent, the short-time water amount is large, and the safety production of mines is seriously threatened. Therefore, geophysical exploration is needed to find out water-rich abnormal areas in coal mines so as to make corresponding precautionary measures. The transient electromagnetic method is a preferred method in the current coal field hydrogeological exploration due to high construction efficiency, pure secondary field observation and sensitivity to low-resistance bodies. Due to the fact that surface gullies in the northwest region are vertical and horizontal and the relief of the terrain is large, the ground transient electromagnetic method is difficult to operate and high in construction cost. In addition, the required depth of detection of the coal seam roof in the region is usually more than 150m, the detection effective distance of the underground transient electromagnetic method is within 100m, the underground safe production requirement cannot be met, the underground transient electromagnetic method is interfered by instruments and equipment in a coal mine, metal pipelines and the like, and the data value is easy to distort, so that the detection result is unreliable. The detection system based on the three-dimensional transient electromagnetic data acquisition of the space above the well and below the well, which is proposed in recent years, can realize three-dimensional dynamic detection and improve detection precision, but has the defects that a transmitting coil is influenced by surface relief, a receiving area is only limited in a roadway, and the water-bearing characteristic of a roof rock stratum in a working face cannot be reflected.
The utility model discloses based on current ground and the not enough of transient electromagnetic method detectability in the pit, to the difficult point of china northwest coal mining area water damage prevention and control, provide 5G + CMFT-R time domain electromagnetic field exploration system, aim at reduce cost, improve the accuracy of testing result, satisfy mine safety, efficient production requirement.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a 5G + CMFT-R time domain electromagnetic field exploration system to solve the transient electromagnetic method and survey the distance in the pit limited, the resolving power is poor, data is unreliable, receives topography influence construction difficulty, problem such as with high costs on ground, improve the accuracy of probing result, satisfy mine safety, efficient production requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the 5G + CMFT-R time domain electromagnetic field exploration system is characterized in that: the system comprises a downhole signal transmitting system, a surface signal acquisition system, a data transmission control system and a data imaging interpretation system.
The downhole signal transmitting system comprises a transmitter module and a transmitting coil module.
The ground signal acquisition system comprises a receiver module and a receiving coil module.
The data transmission control system comprises a mining optical fiber cable, a 5G underground communication base station and a 5G ground communication base station, wherein the 5G underground communication base station is connected with the 5G ground communication base station through the mining optical fiber cable for communication, and finally, the same-frequency synchronization of receiving and transmitting is realized.
The data imaging interpretation system is installed in the receiver.
Preferably, the transmitter is a high-power transmitter capable of transmitting large current, a transmission power supply and a 5G signal receiving module are arranged in the transmitter, and the transmitter generally has explosion-proof performance;
preferably, the transmitting coil is made of a high-quality copper wire and can bear large current and high voltage;
preferably, the receiver is internally provided with a 5G signal receiving module, and has the characteristics of long standby time, high sampling rate and the like; the standby time is not less than 8 hours generally, the sampling interval is less than 1 mus, and the sampling frequency is higher than 1M;
preferably, the receiving coil is made of high-quality copper wire, can be wound by a plurality of turns, and has the characteristics of wide frequency band, high sensitivity and the like;
the utility model has the advantages that:
(1) the utility model discloses fully considered the characteristics of mine environment, encircleed whole working face with transmitting coil, avoided ground transient electromagnetic method to receive big, the operation difficulty of topography fluctuation, construction cost scheduling problem.
(2) The high-power transmitter is used for transmitting the large-magnetic-moment transient electromagnetic signal underground, the problems of short detection distance, low precision and complex construction of the traditional mine small-coil transient electromagnetic are solved, and stronger transient electromagnetic response information can be obtained, so that the judgment precision of the water-bearing property of the coal seam roof rock stratum is improved, and a reliable technical basis is provided for mine safety production.
(3) The utility model discloses a "transmission" mode of secondary induction electromagnetic field is received on underground transmission primary electromagnetic field and ground has formed the electromagnetic field perspective observation mode to the different terranes of coal seam roof, and data analytic formation of image result has higher resolution ratio than current transition electromagnetic survey, and especially more accurate to the judgement of the unusual district degree of depth of electrical property.
(4) The utility model discloses well ground detection region is greater than working face projection area, can provide more comprehensive, abundant transition electromagnetic data for the actual damaged area of coal seam exploitation, satisfies the demand of mine safety in production.
Drawings
Fig. 1 is a perspective view of the observation method of the present invention, wherein: 1. the method comprises the following steps of measuring a network, 2, measuring lines, 3, measuring points, 4, a water-rich abnormal body, 5, a coal seam 6, a transmitting coil, 7, a roadway, 8, a transmitter, 9, 5G underground communication base stations, 10, a receiver, 11, a receiving coil, 12, 5G ground communication base stations, 13 and a mining optical fiber cable.
Detailed Description
The present invention is further illustrated by the following embodiments, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1, the 5G + CMFT-R time domain electromagnetic field exploration system of the present invention comprises a downhole signal transmitting system, a ground signal collecting system, a data transmission control system and a data imaging interpretation system. The underground signal transmitting system comprises a transmitter module 8 and a transmitting coil module 6, wherein the transmitter 8 is a high-power transmitter capable of transmitting large current, a transmitting power supply and a 5G signal receiving module are arranged in the transmitter 8, the transmitter 8 generally has explosion-proof performance, and the transmitting coil 6 is made of high-quality copper wires and can bear large current and high voltage; the ground signal acquisition system comprises a receiver module 10 and a receiving coil module 11, wherein a 5G signal receiving module is arranged in the receiver 10, and the ground signal acquisition system has the characteristics of long standby time, high sampling rate and the like; the standby time is not less than 8 hours generally, the sampling interval is less than 1 mus, the sampling frequency is higher than 1M, the receiving coil 11 is made of high-quality copper wire, can be wound by a plurality of turns, and has the characteristics of wide frequency band, high sensitivity and the like; the data transmission control system comprises a mining optical fiber cable 13, a 5G underground communication base station 9 and a 5G ground communication base station 12, the 5G underground communication base station is connected with the 5G ground communication base station through the mining optical fiber cable for communication, and finally the receiving and transmitting co-frequency synchronization is realized, and the data imaging interpretation system is installed in a receiver.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (5)
1.5G + CMFT-R time domain electromagnetic field exploration system, its characterized in that: the system comprises an underground signal transmitting system, a ground signal collecting system, a data transmission control system and a data imaging interpretation system, wherein the underground signal transmitting system comprises a transmitter module and a transmitting coil module, the ground signal collecting system comprises a receiver module and a receiving coil module, the data transmission control system comprises a mining optical fiber cable, a 5G underground communication base station and a 5G ground communication base station, the 5G underground communication base station is connected and communicated with the 5G ground communication base station through the mining optical fiber cable, the same frequency synchronization of receiving and transmitting is finally realized, and the data imaging interpretation system is installed in the receiver.
2. The 5G + CMFT-R time-domain electromagnetic field survey system of claim 1, wherein: the transmitter is a high-power transmitter capable of transmitting large current, a transmitting power supply and a 5G signal receiving module are arranged in the transmitter, and the transmitter has explosion-proof performance.
3. The 5G + CMFT-R time-domain electromagnetic field survey system of claim 1, wherein: the transmitting coil is made of a high-quality copper wire and can bear large current and high voltage.
4. The 5G + CMFT-R time-domain electromagnetic field survey system of claim 1, wherein: the receiver built-in 5G signal receiving module has the characteristics of long standby time and high sampling rate; wherein the standby time is not less than 8 hours, the sampling interval is less than 1 mus, and the sampling frequency is higher than 1M.
5. The 5G + CMFT-R time-domain electromagnetic field survey system of claim 1, wherein: the receiving coil is made of high-quality copper wires, can be wound by a plurality of turns, and has the characteristics of wide frequency band and high sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021969680.5U CN213658990U (en) | 2020-09-10 | 2020-09-10 | 5G + CMFT-R time domain electromagnetic field exploration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021969680.5U CN213658990U (en) | 2020-09-10 | 2020-09-10 | 5G + CMFT-R time domain electromagnetic field exploration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213658990U true CN213658990U (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021969680.5U Withdrawn - After Issue CN213658990U (en) | 2020-09-10 | 2020-09-10 | 5G + CMFT-R time domain electromagnetic field exploration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213658990U (en) |
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2020
- 2020-09-10 CN CN202021969680.5U patent/CN213658990U/en not_active Withdrawn - After Issue
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210709 Effective date of abandoning: 20220916 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210709 Effective date of abandoning: 20220916 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |