CN209979870U - In-hole scanning detection device based on electromagnetic induction principle - Google Patents
In-hole scanning detection device based on electromagnetic induction principle Download PDFInfo
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- CN209979870U CN209979870U CN201921066317.XU CN201921066317U CN209979870U CN 209979870 U CN209979870 U CN 209979870U CN 201921066317 U CN201921066317 U CN 201921066317U CN 209979870 U CN209979870 U CN 209979870U
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 24
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- 238000005553 drilling Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 18
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- 238000010276 construction Methods 0.000 description 4
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Abstract
The utility model discloses a scanning detection device in hole based on electromagnetic induction principle, the device includes: the device comprises a shell, and a receiving device, a transmitting device, a shielding device and a propelling device which are arranged in the shell; the receiving device is arranged at the front end in the shell, and the transmitting device is positioned at a preset distance behind the receiving device; the shielding device is a hollow cylinder and is arranged on the periphery of the launching device; the propelling device is in driving connection with the shielding device. The detection device is based on the electromagnetic induction principle, is simple in structure, adopts a transmitting device to transmit a primary field in the drilling process, utilizes a receiving device to obtain the electromagnetic field response characteristics of the geologic body at the periphery of the hole wall, shields electromagnetic signals in non-detection directions, achieves the directional detection purpose, is not interfered by metal in a roadway, and can accurately detect the distribution condition of the geologic body at the periphery of the hole wall.
Description
Technical Field
The utility model relates to a mine geophysical technical field, in particular to scanning detection device in hole based on electromagnetic induction principle.
Background
During the tunneling of the mine tunnel, the mine tunnel is often threatened by hidden water-guiding geological structures such as a fault, a collapse column and a goaf from the front, and how to accurately find out the water-containing geologic body in the front of the tunneling tunnel is the key for guaranteeing the safe tunneling of the tunnel. At present, the advanced detection method of water damage of a mine excavation roadway comprises a drilling method and a geophysical method.
The drilling method has the characteristics of visual and accurate detection results, but the construction period is long, the working efficiency is low, the detection range is only 'one hole' and the geological information on the periphery of the wall of the drilled hole cannot be obtained.
The mine geophysical method comprises a mine transient electromagnetic method, a mine direct current resistivity method, a mine geological radar, a roadway-borehole transient electromagnetic method, well logging and the like. However, the conventional mine transient electromagnetic detection device is large, can only be constructed in a roadway and is seriously interfered by metal. The direct current resistivity method for the mine is troublesome in arranging the grounding electrode, and the construction efficiency is low. The low-frequency detection antenna of the mine geological radar is long, is difficult to develop in a limited space under a well, and cannot identify the water-rich property of a geologic body. The roadway-borehole transient electromagnetic method adopts a mode of transmitting in a well and receiving in a borehole, a transmitting device of the method is a conventional coil, the interference of metal in the roadway is large, and the method does not have detection directivity. The geophysical logging method has more devices, such as an electromagnetic method while drilling, but the geophysical logging method can only obtain geological information of a hole wall and cannot obtain the geologic body distribution condition at the periphery of the hole wall.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, provided the utility model discloses a scanning detection device in hole based on electromagnetic induction principle based on the electromagnetic induction principle, can obtain the outlying geologic body distribution of pore wall to reach directive property detection purpose.
An embodiment of the utility model provides a scanning detection device in hole based on electromagnetic induction principle, include: the device comprises a shell, and a receiving device, a transmitting device, a shielding device and a propelling device which are arranged in the shell;
the receiving device is arranged at the front end in the shell, and the transmitting device is positioned behind the receiving device;
the shielding device is a hollow cylinder with one side opening and is arranged on the periphery of the launching device;
the propelling device is in driving connection with the shielding device.
Further, a hollow high-strength plastic shell is arranged inside the shell;
a first annular groove is formed in the outer side surface of the hollow high-strength plastic shell and is close to the rear end; winding a multi-turn coil in the first annular groove to form a transmitting magnetic core coil;
inserting a first ferrite core into the rear end of the hollow high-strength plastic shell;
the length of the first ferrite core is the same as the length of the first annular groove;
the transmitting core coil and the first ferrite core constitute the transmitting device.
Furthermore, a second annular groove is formed in the outer side surface, close to the front end, of the hollow high-strength plastic shell; winding a multi-turn coil in the second annular groove to form a receiving magnetic core coil;
inserting a second ferrite magnetic core into the front end of the hollow high-strength plastic shell;
the length of the second ferrite core is the same as the length of the second annular groove;
the receiving core coil and the second ferrite core constitute the receiving device.
Further, a bracket is also included in the shell; the bracket is fixedly connected with the inner wall of the shell;
the middle of the bracket is provided with a connecting hole, and the hollow high-strength plastic shell penetrates through the connecting hole.
Furthermore, the shielding device is a hollow cylindrical permalloy shielding case sheet, the side surface of the shielding device is provided with an opening, and the rear surface of the shielding device is provided with a hollow shaft; the hollow shaft is connected with the propulsion device.
Further, the shield sheet length is 2 times the first ferrite core length.
Further, the propulsion device comprises: the device comprises a push rod, a stepping motor and a rotating shaft connected with the stepping motor;
the stepping motor is arranged at the front end of the push rod; the rear part of the push rod is in threaded connection with the rear end of the shell;
the rotating shaft is connected with the hollow shaft.
Further, the shell is made of high-strength plastic, and a conical high-strength plastic cover is arranged at the front end of the shell.
The embodiment of the utility model provides a pair of scanning detection device in hole based on electromagnetic induction principle, include: the device comprises a shell, and a receiving device, a transmitting device, a shielding device and a propelling device which are arranged in the shell; the receiving device is arranged at the front end in the shell, and the transmitting device is positioned at a preset distance behind the receiving device; the shielding device is a hollow cylinder and is arranged on the periphery of the launching device; the propelling device is in driving connection with the shielding device. The detection device is based on the electromagnetic induction principle, is simple in structure, adopts a transmitting device to transmit a primary field in the drilling process, utilizes a receiving device to obtain the electromagnetic field response characteristics of the geologic body at the periphery of the hole wall, shields electromagnetic signals in non-detection directions, is not interfered by metal in a roadway, achieves the directional detection purpose, and can accurately detect the geologic body distribution condition at the periphery of the hole wall.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a structural diagram of a hole scanning and detecting device based on the electromagnetic induction principle according to an embodiment of the present invention.
Fig. 2 is a structural diagram of the hollow high-strength plastic shell 6 inside the detection device provided by the embodiment of the present invention.
Fig. 3 is a schematic view of the connection of the internal device of the detection device according to the embodiment of the present invention.
Fig. 4 is a schematic view of an inner bracket of the detection device provided by the embodiment of the present invention.
Fig. 5 is a structural diagram of the shielding device 4 inside the detection device according to the embodiment of the present invention.
Fig. 6 is a structural diagram of the propulsion device 5 inside the detection device according to the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides a scanning detection device in hole based on electromagnetic induction principle, including: the device comprises a shell 1, a receiving device 2, a transmitting device 3, a shielding device 4 and a propelling device 5 which are arranged on the shell 1; casing 1 is made by stereoplasm high strength plastic, can satisfy the material that uses in the mine tunnel environment all can, the embodiment of the utility model provides a do not injecing to this. The front end of the shell 1 is provided with a conical high-strength plastic cover 11 for sealing the whole detection device and preventing rock debris or flushing fluid in a drill hole from entering the detection device.
The receiving device 2 is arranged at the front end in the shell 1, and the transmitting device 3 is positioned behind the receiving device 2; the shielding device 4 is a hollow cylinder with an opening at one side and is arranged on the periphery of the emitting device 3; and the non-detection signals are shielded and are not interfered by metal in the roadway. The propulsion device 5 is in driving connection with the shielding device 4.
The detection device is based on the electromagnetic induction principle, is simple in structure, adopts a transmitting device to transmit a primary field in the drilling process, utilizes a receiving device to obtain the electromagnetic field response characteristics of the geologic body at the periphery of the hole wall, shields electromagnetic signals in non-detection directions, achieves the directional detection purpose, is not interfered by metal in a roadway, and can accurately detect the distribution condition of the geologic body at the periphery of the hole wall. When the water-logging underground mass body drilling device is used, the distribution characteristics of the geological bodies outside the holes can be obtained only by one drilling hole, the utilization rate of the drilling hole can be improved, the arrangement of water-logging drilling holes can be guided, and the safe tunneling of a mine roadway is guaranteed.
Further, a hollow high-strength plastic shell 6 is arranged inside the shell 1; the hollow high-strength plastic shell 6 has a certain length, the rear end is provided with a transmitting device 3, and the front end is provided with a receiving device 2.
Wherein: referring to fig. 2, a first annular groove 61 is formed on the outer side surface of the hollow high-strength plastic shell 6 near the rear end; near the front end there is a second annular groove 64.
Referring to fig. 3, a plurality of turns of a coil are wound in the first annular groove 61 to form a transmitting core coil 62; a first ferrite core 63 is tightly inserted into the rear end of the hollow high-strength plastic shell 6; the length of the first ferrite core 63 is the same as the length of the first annular groove 61; the transmitting core coil 62 and the first ferrite core 63 constitute the transmitting device 3.
Winding a multi-turn coil in the second annular groove 64 to form a receiving magnetic core coil 65; a second ferrite core 66 is tightly inserted into the front end of the hollow high-strength plastic shell 6; the length of the second ferrite core 66 is the same as the length of the second annular groove 64; the receiving core coil 65 and the second ferrite core 66 constitute the receiving apparatus 2.
In the embodiment, the magnetic core coil is used as the excitation source, so that the signal intensity of the primary field can be effectively increased.
Further, as shown in fig. 3 to 4, the housing 1 further includes a bracket 7 therein; the bracket 7 is fixedly connected with the inner wall of the shell 1; the bracket 7 is located at an intermediate position inside the housing 1; wherein, the bracket 7 is provided with a connecting hole 71 in the middle, and the hollow high-strength plastic shell 6 passes through the connecting hole 71. Under the action of the bracket, the axes of the transmitting device 3 and the receiving device 2 are consistent with the outer shell, and the position of the transmitting device 3 and the receiving device 2 in the shell 1 is also ensured to be fixed.
In specific implementation, for example, the whole hollow high-strength plastic shell 6 can be inserted into the connecting hole 71 of the bracket 7 to ensure that the bracket is positioned in the middle of the high-strength plastic shell, and the bracket is bonded by strong glue.
Further, referring to fig. 5, the shielding device 4 is a hollow cylindrical permalloy shielding sheet having an angled opening on its side, a hollow shaft 41 on its rear bottom surface, and an open front surface without shielding.
The shield length is 2 times the first ferrite core 63. The device is used for shielding electromagnetic field signals in a non-detection direction excited by the transmitting magnetic core coil, reducing interference in other directions, and receiving a secondary field generated by excitation of a geologic body by the other magnetic core coil to achieve directional detection.
Wherein the hollow shaft 41 is connected to the propulsion device 5.
Further, referring to fig. 6, the propulsion device 5 comprises: a push rod 51, a stepping motor 52, and a rotation shaft 53 connected to the stepping motor 52; a stepping motor 52 is arranged at the front end of the push rod 51, and the rear part of the push rod 51 is in threaded connection with the rear end of the shell 1; the rotating shaft 53 is connected with the hollow shaft 41 to drive the shielding case to rotate.
In this embodiment, the rotating shaft of the stepping motor is stably connected with the hollow shaft at the rear end of the shielding case, the shielding case is driven to rotate in the drilling hole, and other devices are fixed. The front end of the push rod is connected with the rear end of the detection device to push the detection device to move towards the hole. The stepping motor is provided with a certain fixed rotation angle, and the opening of the shielding case in the initial detection direction is vertically upward. When the stepping motor does not rotate, the opening of the shielding case is vertically upward and is marked as the direction of 0 degree. The push rod is fixedly connected with the rear end of the high-strength plastic shell through internal threads and used for pushing the scanning detection device to move in the drilled hole. The scanning detection device works in a near-horizontal advanced exploration drilling hole, and the diameter of the drilling hole is 10-20mm larger than that of the scanning detection device.
In this embodiment, the use method of the device for scanning and detecting in a hole based on the electromagnetic induction principle includes the following steps:
step 1, reasonably setting construction parameters according to geological parameters; the construction parameters comprise scanning detection angle intervals and point distances;
step 2, placing the in-hole scanning detection device based on the electromagnetic induction principle in an advanced exploration drilling hole, and starting to collect data; supplying power to a transmitting magnetic core coil with a shielding case, transmitting an excited primary field to the periphery of the hole wall, exciting a geologic body at the periphery of the hole wall after the hole wall is closed to generate a secondary field, and receiving a secondary field signal by using the magnetic core coil;
step 3, the stepping motor drives the shielding cover to rotate for a preset angle interval to the next scale direction, the other devices are kept still, data are collected continuously, the current scanning detection direction is recorded according to the number of times of rotation of the stepping motor, directional detection in each scale direction is carried out in sequence until 360-degree scanning detection is completed in rotation, and the drilling footage at the moment is recorded; if the response amplitude of the abnormal body in a certain direction is large, the scanning angle can be encrypted, and sufficient data volume and high resolution are ensured;
and 4, along the advanced exploration drilling, advancing the in-hole scanning detection device based on the electromagnetic induction principle into the hole in parallel to the next measuring point, starting detection from 0 degree, and repeating the steps 2 and 3 until the scanning detection of all the measuring points in the drilling is completed.
In this embodiment, during implementation, the single-point scanning detection angle interval and the point distance are reasonably set in the borehole according to the characteristics of the detection target body, a dipole-dipole device is adopted, a magnetic core coil is used as a transmission source to excite a primary field, signals in a non-detection direction are shielded, and another magnetic core coil is used for receiving a secondary field generated by excitation of a geological body on the periphery of the borehole wall in the borehole. Starting from 0 degree for each measuring point, completing 360-degree directional detection according to each angle direction, and then completing scanning detection of the whole drilling hole point by point.
The distribution characteristics of the geologic body outside the hole can be obtained by only one drilling hole, so that the utilization rate of the drilling hole can be improved, the arrangement of the water detecting and discharging drilling holes can be guided, and the safe tunneling of a mine roadway is guaranteed. The magnetic core coil is used as an excitation source, so that the defect that excitation signals of small coils in the drilling hole are weak is overcome. The permalloy shielding cover with the opening is arranged on the transmitting magnetic core coil to shield non-detection signals, so that useful signals can be highlighted, interference in other directions is reduced, and directional detection can be realized.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An in-hole scanning probe based on the electromagnetic induction principle, comprising: the device comprises a shell (1), and a receiving device (2), a transmitting device (3), a shielding device (4) and a propelling device (5) which are arranged in the shell (1);
the receiving device (2) is arranged at the front end in the shell (1), and the transmitting device (3) is positioned behind the receiving device (2);
the shielding device (4) is a hollow cylinder with an opening at one side and is arranged on the periphery of the emitting device (3);
the propulsion device (5) is in driving connection with the shielding device (4).
2. The device for detecting the scanning in the hole based on the electromagnetic induction principle as claimed in claim 1 is characterized in that the shell (1) is internally provided with a hollow high-strength plastic shell (6);
a first annular groove (61) is formed in the outer side surface of the hollow high-strength plastic shell (6) and close to the rear end; winding a plurality of turns of coils in the first annular groove to form a transmitting magnetic core coil (62);
inserting a first ferrite core (63) into the rear end of the hollow high-strength plastic shell (6);
the length of the first ferrite core (63) is the same as the length of the first annular groove (61);
the transmitting core coil (62) and the first ferrite core (63) form the transmitting device (3).
3. The device for scanning and detecting in the hole based on the electromagnetic induction principle as claimed in claim 2, characterized in that the hollow high-strength plastic shell (6) has a second annular groove (64) on the outer side near the front end; winding a plurality of turns of coil in the second annular groove (64) to form a receiving magnetic core coil (65);
inserting a second ferrite core (66) into the front end of the hollow high-strength plastic shell (6);
the length of the second ferrite core (66) is the same as the length of the second annular groove (64);
the receiving core coil (65) and the second ferrite core (66) constitute the receiving device (2).
4. A device for scanning and detecting in a hole based on the principle of electromagnetic induction as claimed in claim 3, characterized in that said housing (1) further comprises a support (7); the bracket (7) is fixedly connected with the inner wall of the shell (1);
the middle of the bracket (7) is provided with a connecting hole (71), and the hollow high-strength plastic shell (6) penetrates through the connecting hole (71).
5. A device for scanning and detecting in a hole based on the electromagnetic induction principle as claimed in claim 3, characterized in that said shielding means (4) is a hollow cylindrical permalloy shielding sheet having an opening at the side and a hollow shaft (41) at the rear; the hollow shaft (41) is connected to the propulsion device (5).
6. An electromagnetic induction principle based scanning detection device in a hole as claimed in claim 5, characterized in that the shield foil length is 2 times the length of the first ferrite core (63).
7. An in-hole scanning probe based on the electromagnetic induction principle as claimed in claim 5, characterized in that said propelling means (5) comprises: a push rod (51), a stepping motor (52) and a rotating shaft (53) connected with the stepping motor (52);
the stepping motor (52) is arranged at the front end of the push rod (51); the rear part of the push rod (51) is in threaded connection with the rear end of the shell (1);
the rotating shaft (53) is connected to the hollow shaft (41).
8. A device for scanning and detecting in a hole based on the principle of electromagnetic induction as claimed in claim 1, characterized in that said housing (1) is made of high-strength plastic, and has a conical high-strength plastic cover (11) at the front end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066317.XU CN209979870U (en) | 2019-07-09 | 2019-07-09 | In-hole scanning detection device based on electromagnetic induction principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066317.XU CN209979870U (en) | 2019-07-09 | 2019-07-09 | In-hole scanning detection device based on electromagnetic induction principle |
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| CN209979870U true CN209979870U (en) | 2020-01-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244368A (en) * | 2019-07-09 | 2019-09-17 | 中国矿业大学(北京) | Scanning probe device and method in a kind of hole based on electromagnetic induction principle |
| CN111694060A (en) * | 2020-05-13 | 2020-09-22 | 东华理工大学 | FOOTPRINT technology-based multi-channel transient electromagnetic inversion method and transient electromagnetic surveying device |
| CN114236637A (en) * | 2022-02-25 | 2022-03-25 | 西安中地博睿探测科技有限公司 | Advanced detection device for mine roadway |
-
2019
- 2019-07-09 CN CN201921066317.XU patent/CN209979870U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244368A (en) * | 2019-07-09 | 2019-09-17 | 中国矿业大学(北京) | Scanning probe device and method in a kind of hole based on electromagnetic induction principle |
| CN110244368B (en) * | 2019-07-09 | 2024-04-26 | 中国矿业大学(北京) | In-hole scanning detection device and method based on electromagnetic induction principle |
| CN111694060A (en) * | 2020-05-13 | 2020-09-22 | 东华理工大学 | FOOTPRINT technology-based multi-channel transient electromagnetic inversion method and transient electromagnetic surveying device |
| CN114236637A (en) * | 2022-02-25 | 2022-03-25 | 西安中地博睿探测科技有限公司 | Advanced detection device for mine roadway |
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