CN116299724A - Full-section overlying strata structure and separation layer frequency modulation periodic pulse type electromagnetic device and method - Google Patents

Abstract

The invention belongs to the technical field of mine safety monitoring, and discloses a pulse electromagnetic device and a pulse electromagnetic method for a full-section overlying strata structure and a separation layer frequency modulation period. The transmitting unit transmits the frequency-modulated periodic pulse electromagnetic wave to the receiving unit through the integrated arc convex coil; the receiving unit receives the frequency-modulated periodic pulse electromagnetic waves sent by the transmitting unit, acquires an electromagnetic field form after being processed by a three-point positioning method through an integrated electromagnetic wave receiver, and sends the electromagnetic field form to the processing unit; and the processing unit receives the signals sent by the receiving unit and processes the signals to obtain a motion state model of the whole full section of the overlying strata. The invention solves the technical problem that the full-section overlying strata structure and the separation layer space can not be measured on site, and has great reference value for controlling the ground surface subsidence, the separation layer grouting technology, the safe production of mining areas and the like.

Description

Full-section overlying rock structure and separation layer frequency modulation periodic pulse electromagnetic device and method

technical field

The invention belongs to the technical field of mine safety monitoring, and in particular relates to a full-section overlying rock structure and a separation layer frequency-modulated periodic pulse electromagnetic device and method.

Background technique

The theory of mine pressure and control points out that with the advancement of the working face in coal seam mining, the stress balance of the rock mass around the goaf is destroyed, and the overlying rock moves, deforms, breaks and forms a large number of cracks, along the inter-layer or intra-layer bedding The cracks that are pulled apart in the direction produce a detachment layer. As the overlying rock movement develops to the surface, the ground will subside, which will seriously damage the ground buildings and farmland, causing major accidents of casualties.

At present, the analysis of the full-section overlying rock structure and separated layer space is mostly determined based on mine pressure and mechanical theory calculations, similar material simulations, and computer simulations; performance analysis. Since the location of the separation layer is generally located above the fault zone in the overlying strata above the goaf and within the lower part of the overall bending zone, it is difficult for personnel and equipment to directly enter the measurement.

Through the above analysis, the existing problems and defects of the existing technology are: the traditional layer separation instrument has a small monitoring range, low monitoring accuracy, complicated operation and lack of intuitive monitoring results. Carry out large-scale, high-precision direct monitoring with the separation space.

Contents of the invention

In order to overcome the problems existing in the related technologies, the disclosed embodiments of the present invention provide a full-section overlying rock structure and a layer-separation frequency-modulated periodic pulse electromagnetic device and method, the purpose of which is to accurately measure the full-section overlying rock structure and abscission space, etc. Provide technical support for the next step of controlling surface subsidence, separation layer grouting technology, and safe production in mining areas.

The technical solution is as follows: a full-section overlying rock structure and a separation-layer frequency-modulated periodic pulse electromagnetic device, including a monitoring device, and the monitoring device includes a transmitting unit, a receiving unit, and a processing unit;

The transmitting unit transmits the frequency-modulated periodic pulsed electromagnetic wave to the receiving unit through the integrated arc convex coil;

The receiving unit receives the frequency-modulated periodic pulsed electromagnetic wave sent by the transmitting unit, obtains the electromagnetic field form after being processed by the integrated electromagnetic wave receiver through the three-point positioning method, and sends the electromagnetic field form to the processing unit; The electromagnetic field form includes the monitoring radius, the total field strength, amplitude, phase, and direction of the electromagnetic field, and the law of the electromagnetic field changing with space;

The processing unit receives the signal sent by the receiving unit, and performs signal processing to obtain a motion state model of the entire cross-section of the overlying rock stratum, and the motion state model includes various layered structures, cracks, and spatial geometric models of abscission layers, etc. .

In one embodiment, the transmitting unit includes a frequency-modulated beam instrument, which is sent into the borehole through the first electric pulley during monitoring;

The frequency modulation beam meter includes a power supply system, a frequency conversion device, a transmitting coil and a first fixing mechanism, and a first electro-hydraulic telescopic rod is arranged on the left side of the frequency modulation beam meter to anchor the first fixing mechanism on the wall of the borehole , On the right side of the FM beam meter, there is a first electric pulley to control the lifting of the transmitting unit, and the middle part of the FM beam meter is used to pass through the first reserved hole for connecting wires to pass through and connect to the receiving unit.

In one embodiment, the power supply system is arranged at the upper left inside the FM beam meter, and is composed of an oscillator, a transmission line, and a dipole antenna, used to generate periodic pulsed electromagnetic waves, and is connected to the frequency conversion device through wires ;

The frequency conversion device is arranged on the upper right inside the FM beam instrument, and is connected with the transmitting coil through wires. The frequency conversion device is used to modulate the strength of the transmission signal by changing the frequency of the oscillating current, and it is suitable for different rock types Emit electromagnetic waves of different strengths;

The transmitting coil is arranged under the inside of the FM beam meter, and is composed of a circular arc convex coil, a magnetic isolation plate, and a connecting wire, and is used for transmitting periodic pulsed electromagnetic waves; the circular arc convex coil is used to increase the original The number of coil winding turns enhances the strength of the transmitted signal.

In one embodiment, an explosion-proof and waterproof casing is provided outside the transmitting unit for explosion-proof, waterproof and instrument rust prevention.

In one embodiment, the receiving unit includes a three-point receiver, which is sent into the borehole through the second electric pulley during monitoring, and the three-point receiver is composed of an electromagnetic wave receiver and a second fixing mechanism; on the left side of the three-point receiver The second electro-hydraulic telescopic rod is provided to anchor the second fixing mechanism on the wall of the borehole.

In one embodiment, the electromagnetic wave receiver is used to receive electromagnetic wave data emitted by the FM beam meter.

In one embodiment, the receiving unit is provided with an explosion-proof and waterproof casing for explosion-proof, waterproof, and instrument corrosion prevention; the middle part of the receiving unit is reserved for passing through the second reserved hole, so that the connecting wires can pass through, and the processing unit connection.

In one embodiment, the processing unit includes a host and an explosion-proof and waterproof casing, and is installed on the surface during monitoring. The host is composed of a switch, a drive module, a control module, a filter, a processing module, a temperature sensing module, and an automatic alarm. Module, display instrument imaging system, electro-hydraulic telescopic rod start switch, electric pulley control lift switch; the drive module and control module are used to control the opening and closing of the transmitting unit, and are connected to the filter through wires; The required frequency components are separated from the frequency components, and connected to the processing module through wires; the processing module collects data from the outside of the host software and inputs the data into a socket inside the host software for data processing, terrain correction and preliminary determination Each layered structure, fissure, and separation layer are pretreated, and connected to the temperature sensing module through wires; the temperature sensing module is used to monitor the temperature of the mine and the instrument and convert it into a signal output to the host computer, and connect to the automatic alarm module through wires connected, the automatic alarm module is used to automatically monitor the size of the separation layer and safety explosion-proof, the automatic alarm module is connected to the imaging system of the display instrument through a wire, and the imaging system of the display instrument receives the data transmitted by the processing module, and draws the resistivity of the rock formation At the same time, the monitoring data is sorted out and analyzed to form an apparent resistivity contour map, which reflects the lithological characteristics of the formation through the apparent resistivity curve, and the resistivity tomography technology is used for data collection and computer processing. Through the tomography processing of the collected data, the results are output in a certain graphic image form, and the full-section overlying rock structure and abscission layer space geometric model are established to obtain the full-section motion state map of the overlying rock layer; the full-section overlying rock layer The motion state diagram includes various layered structures, cracks, and separation layers in spatial distribution; The stretching of the electric pulley; the electric pulley control lift switch is located under the imaging system of the display instrument, and is used to control the lifting of the first electric pulley and the second electric pulley.

Another object of the present invention is to provide a monitoring method for a full-section overlying rock structure and a layer-separated frequency-modulated periodic pulse electromagnetic device. The ground surface is selected as a reference plane, and the location of the layer-separated layer is predicted according to mine pressure and mechanical theory calculations. Include the following steps:

S1, using the arc convex coil to send and receive the periodic pulsed electromagnetic wave after frequency modulation;

S2, the receiving unit obtains the electromagnetic field form after being processed by the three-point positioning method through the integrated electromagnetic wave receiver, and sends the electromagnetic field form to the processing unit; the electromagnetic field form includes the monitoring radius, the total field strength of the electromagnetic field, the amplitude, Phase, direction, and the law of electromagnetic fields changing with space;

S3, the processing unit receives the signal sent by the receiving unit, and performs signal processing to obtain the motion state model of the entire cross-section of the overlying rock stratum, the motion state model includes various layered structures, cracks, and spatial geometric models of abscission layers, etc. .

In one embodiment, the three-point positioning method in step S2 includes: setting the receiving channel of the three-point positioning device through the electromagnetic wave receiver, and performing area classification according to the strength of the electromagnetic wave signal when the electromagnetic wave receiver detects multiple disordered electromagnetic wave signals , select three locations as reference points, test at each reference point, determine the incoming wave direction of each reference point, and gather the incoming wave directions of the three reference points. Again, by measuring the distance between the terminal and the starting point as the radius of the three reference point circles, the three reference points draw three circles, and the three arcs intersect at one point, which is the terminal position. The receiving point is finally determined to receive the electromagnetic wave data emitted by a plurality of FM beam instruments.

Combining all the above-mentioned technical solutions, the advantages and positive effects of the present invention are: the monitoring device adopted in the present invention is easy to operate, has a large monitoring range, accurate monitoring results, and can transmit data in real time and image rapidly, making the monitoring results more intuitive , overcoming the shortcomings of the traditional abscission instrument such as small monitoring range, few monitoring points, inaccurate monitoring effect, and difficult installation, etc., and finally solved the difficult problem of direct measurement of the full-section overlying rock structure and abscission space.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure;

Fig. 1 is a schematic diagram of a full-section overlying rock structure and a layer-separated frequency-modulated periodic pulse electromagnetic device provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a transmitting coil provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an electromagnetic wave receiver provided by an embodiment of the present invention;

Fig. 4 is the schematic diagram of the three-point positioning method provided by the embodiment of the present invention;

Fig. 5 is a schematic diagram of the host structure provided by the embodiment of the present invention;

Fig. 6 is a top view of the arrangement of measuring points of the monitoring method provided by the embodiment of the present invention;

Fig. 7 is a cross-sectional view of the arrangement of measuring points of the monitoring method provided by the embodiment of the present invention;

Fig. 8 is a schematic diagram of the operation principle of the monitoring method provided by the embodiment of the present invention;

Fig. 9 is a flow chart of the monitoring method of the full-section overlying rock structure and the separation layer frequency modulation periodic pulse electromagnetic device provided by the embodiment of the present invention;

In the figure: 1. Transmitting unit; 2. Receiving unit; 3. Processing unit; 4. The first electric pulley; 5. Drilling; 6. Power supply system; 7. Frequency conversion device; 8. Transmitting coil; 9. The first Fixing mechanism; 10. The first electro-hydraulic telescopic rod; 11. Monitoring device; 12. The first reserved hole; 13. Connecting wire; 14. Separation layer; 15. Arc convex coil; 16. Magnetic isolation plate; 17 , connecting line; 18, original coil; 19, explosion-proof and waterproof shell; 20, electromagnetic wave receiver; 21, three-point positioning device; 22, reference point; 23, receiving point; 24, host computer; 25, ground surface; 26, switch; 27. Drive module; 28. Control module; 29. Filter; 30. Processing module; 31. Temperature sensing module; 32. Automatic alarm module; 33. Display imaging system; 34. Electrohydraulic telescopic rod start switch; 35 , electric pulley control lifting switch; 36, eye cutting; 37, stop production line; 38, return air trough; 39, middle position point; 40, track trough; 41, drilling position distribution structure; 42, electromagnetic field; 43. The second electric pulley; 44. The second fixing mechanism; 45. The second electro-hydraulic telescopic rod; 46. The second reserved hole.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

The main innovation of the present invention is that the periodic pulsed electromagnetic wave is applied to the separation layer 14 for the first time, and the arc convex transmitting coil 8 is proposed for the first time, and the three-point positioning method is applied to the separation layer 14 monitoring for the first time. It can be applied to all underground spaces that can be drilled.

It can be understood that the present invention proposes for the first time to modulate different periodic pulsed electromagnetic wave frequencies for different rock properties. Harder rocks use low-frequency electromagnetic waves, and softer rocks use high-frequency electromagnetic waves. The frequency is generated by the oscillator of the frequency conversion device 7, and the frequency is selected through the frequency selection network, and a signal of a specific frequency is selected according to the nature of the rock, so as to more accurately detect the movement state of the entire section of the overlying rock formation.

It can be understood that the present invention proposes a three-point positioning method for the first time: when the receiving unit 2 receives a plurality of disordered electromagnetic wave signals emitted by the transmitting unit 1, it performs regional classification according to the strength of the electromagnetic wave signals, and randomly selects three positions as reference points 22 , carry out tests at each reference point 22, determine the incoming wave direction of each reference point 22, and gather the incoming wave directions of the three reference points 22. Again, by measuring the distance between the terminal and the starting point, using it as the radius of the three reference points 22 circles, the three reference points 22 draw three circles, and the three arcs intersect at one point, which is the terminal position; finally The receiving point 23 is determined.

Exemplarily, the full-section overlying rock structure and the separation layer 14 frequency-modulated periodic pulsed electromagnetic device provided by the present invention includes a transmitting unit 1, a receiving unit 2 and a processing unit 3. The transmitting unit 1 is a frequency-modulated beam instrument. During actual monitoring, The frequency-modulated wave velocity meter is installed in the borehole 5, which includes a power supply system 6, a frequency conversion device 7, a transmitting coil 8, and a first fixing mechanism 9. The frequency-modulated wave velocity meter is anchored in the borehole 5 through the first electro-hydraulic telescopic rod 10 On the wall, it is used to emit frequency-modulated periodic pulsed electromagnetic waves. The receiving unit 2 is a three-point receiver. During actual monitoring, the three-point receiver is installed in the borehole 5, which includes an electromagnetic wave receiver 20 and a fixing mechanism. The three-point receiver receives the frequency modulation cycle transmitted by the transmitting unit 1 through the three-point positioning method pulsed electromagnetic waves, and transmitted to the processing unit 3. The processing unit 3 includes a switch, a drive module, a control module, a filter, a processing module, an automatic alarm module, a temperature sensing module, a display imaging system, an electro-hydraulic telescopic rod start switch, an electric pulley control lift switch, and the transmission to the receiving unit The data is processed and automatically imaged, and the full-section overlying rock structure and the spatial geometric structure model of the abscission layer are established. If there is a dangerous area, an automatic alarm module will be activated. The invention can provide technical support for the subsidence control of the surface 25, the grouting technology of the separation layer 14, and the safe production of mining areas.

The present invention adopts frequency-modulated periodic pulsed electromagnetic waves, that is, the electromagnetic waves adopt pulsed electromagnetic waves, and periodically emit pulsed electromagnetic waves to improve the strength and pertinence of exploration signals and improve the accuracy of exploration results. According to the different rock properties around the separation layer 14, By changing the frequency of the oscillating current to modulate the strength of the transmitted signal, the frequency is modulated in a targeted manner, using low-frequency electromagnetic waves for harder rocks, and high-frequency electromagnetic waves for soft rocks, to more accurately explore the full-section overlying rock structure and abscission space etc., to achieve the purpose of the longest detection distance and the highest accuracy, and solve the difficulties of the small monitoring range and inaccurate monitoring results of the traditional abscission instrument, which is used to more accurately, intuitively and quickly respond to the full-section overlying rock structure and abscission space wait.

The electromagnetic wave receiver 20 of the present invention is provided with a three-point positioning receiving channel, which can receive multiple disordered electromagnetic wave signals at the same time, perform multi-point monitoring at the same time, and perform real-time data transmission at multiple measuring points at the same time, for real-time, efficient and accurate reception The electromagnetic wave data emitted by a plurality of frequency modulation beam instruments; the present invention adopts a temperature sensing module and an automatic alarm module for automatically monitoring the size of the separation layer 14, the separation layer 14 width exceeds 10cm, and the temperature is lower than 10 degrees Celsius and higher than When 50 degrees Celsius meets one of the three conditions, the automatic alarm module will be activated to reduce the probability of mine disasters and ensure the safety of people's lives and property.

The method of the present invention is based on the apparent resistivity contour map, reflects the lithological characteristics of the formation through the apparent resistivity curve, adopts resistivity tomography technology for data collection and computer processing, and performs tomography processing through the collected data , output the results in a certain graphic image form, establish the full-section overlying rock structure and the spatial geometric model of the abscission layer, and obtain the full-section motion state diagram of the overlying rock layer, including the structure of each layer, cracks, space abscission, etc., to solve the problem The technical problem that the full-section overlying rock structure and separation layer space cannot be measured on site is of great reference value for the control of surface 25 subsidence, separation layer grouting technology, and safe production in mining areas.

The present invention can be applied on a large scale in on-site engineering practice; the exploration of the full-section overlying rock structure and abscission space through the frequency-modulated periodic pulse electromagnetic wave proposed by the present invention solves the problem of the frequency-adjustable periodic pulse electromagnetic method in the exploration of the abscission layer, and It solves the problem that the full-section overlying rock structure and abscission space cannot be measured on site. The technical scheme of the present invention further solves the technical difficulties such as the small monitoring range of the traditional delamination instrument, the monitoring results are not accurate enough, the installation process is cumbersome, the observation results are not intuitive, and the data cannot be transmitted in real time and can be imaged quickly. Grouting technology, mine safety production, etc. are of great reference value.

As shown in Figure 1, the embodiment of the present invention provides a full-section overburden structure and a layer-separated frequency-modulated periodic pulse electromagnetic device, including a monitoring device 11, and the monitoring device 11 includes a transmitting unit 1, a receiving unit 2, and a processing unit 3 ;

The transmitting unit 1 transmits the frequency-modulated periodic pulsed electromagnetic wave to the receiving unit 2 through the integrated arc convex coil 15;

The receiving unit 2 receives the frequency-modulated periodic pulsed electromagnetic wave sent by the transmitting unit 1, and obtains the form of the electromagnetic field 42 after being processed by the integrated electromagnetic wave receiver 20 through the three-point positioning method, and sends the form of the electromagnetic field 42 The processing unit 3; the form of the electromagnetic field 42 includes a monitoring radius, the total field strength, amplitude, phase, and direction of the electromagnetic field, and the law of the electromagnetic field changing with space;

The processing unit 3 receives the signal sent by the receiving unit 2, and performs signal processing to obtain a motion state model of the entire cross-section of the overlying rock formation, and the motion state model includes the spatial form of each layered structure, cracks, and abscission layer 14 geometric models, etc.

The embodiment of the present invention also provides a monitoring method for the full-section overlying rock structure and the frequency-modulated periodic pulse electromagnetic device of the separation layer 14. The ground surface 25 is selected as the reference plane, and the location of the separation layer 14 is predicted according to the mine pressure and mechanical theory calculations. Specifically include the following steps:

S1, using the arc-shaped convex coil 15 to send and receive the periodic pulsed electromagnetic wave after frequency modulation processing to the receiving unit 2;

S2, the receiving unit 2 obtains the form of the electromagnetic field 42 after being processed by the three-point positioning method through the integrated electromagnetic wave receiver 20, and sends the form of the electromagnetic field 42 to the processing unit 3; the form of the electromagnetic field 42 includes a monitoring radius and an electromagnetic field. The total field strength, amplitude, phase, direction, and the law of the electromagnetic field changing with space;

S3, the processing unit 3 receives the signal sent by the receiving unit 2, and performs signal processing to obtain the motion state model of the entire cross-section of the overlying rock stratum, the motion state model includes the spatial form of each layered structure, cracks and abscission layer 14 geometric models, etc.

Embodiment 1. The embodiment of the present invention provides a full-section overlying rock structure and a layer-separated frequency-modulated periodic pulse electromagnetic device including a monitoring device 11 . The monitoring device 11 includes a transmitting unit 1 , a receiving unit 2 and a processing unit 3 . Among them, the main improvement is that the transmitting unit 1 includes a frequency-modulated beam instrument, which is sent into the borehole 5 through the first electric pulley 4 during monitoring.

The frequency modulation beam meter specifically includes a power supply system 6, a frequency conversion device 7, a transmitting coil 8, and a first fixing mechanism 9, wherein the first fixing mechanism 9 plays a role of a fixed connection among these components, and its specific structure is preferably a cuboid, The first electro-hydraulic telescopic rod 10 is arranged on the left side of the FM beam meter. The purpose of setting the first electro-hydraulic telescopic rod 10 is to firmly anchor the first fixing mechanism 9 on the hole wall so that the FM beam The installation of the beam meter in the borehole 5. A first electric pulley 4 is arranged on the right side of the FM beam meter, and the purpose of the first electric pulley 4 is to control the lifting of the transmitting unit 1 . in addition. A first reserved hole 12 is left in the middle of the FM beam meter for passing through. Specifically, the size of the hole is designed according to the actual needs of the site, and the purpose is to allow the connecting wire 13 to pass through.

The power supply system 6 is arranged on the upper left inside the FM beam meter, and is composed of an oscillator, a transmission line, a dipole antenna, etc., and is used to generate periodic pulsed electromagnetic waves, and is connected with the frequency conversion device 7 through wires.

The frequency conversion device 7 is arranged on the upper right inside the frequency modulation beam meter, and is connected with the transmitting coil 8 through wires. The purpose of the frequency conversion device 7 is to modulate the strength of the transmission signal by changing the frequency of the oscillating current According to different rock types, electromagnetic waves of different strengths and weaknesses are emitted, more targeted monitoring of the full-section overlying rock structure and the rock properties around the separation layer 14, and more accurate responses to the full-section overlying rock structure and separation layer 14 space, etc.

The transmitting coil 8 is arranged below the inside of the FM beam instrument, as shown in FIG. 2 , and is composed of an arc-shaped convex coil 15, a magnetic isolation plate 16, and a connecting wire 17, and is used for transmitting periodic pulsed electromagnetic waves. Among them, the arc-shaped convex coil 15 is provided to increase the area of the magnetic field intensity generated by the transmitting coil 8 by increasing the number of turns of the original coil 18 and enhance the intensity of the transmitting signal. When carrying out actual monitoring, the first fixing mechanism 9 and the first electro-hydraulic telescopic rod 10 firmly grasp the rock wall of the borehole to prevent the frequency modulation beam meter from sliding with the rock formation, so that the frequency modulation beam meter and the rock formation are integrated. An explosion-proof and waterproof casing 19 is arranged outside the transmitting unit 1 for explosion-proof, waterproof, and instrument corrosion prevention.

The receiving unit 2 includes a three-point receiver, which is sent into the borehole 5 through the second electric pulley 43 during monitoring. The three-point receiver is composed of an electromagnetic wave receiver 20 and a second fixing mechanism 44; on the left side of the three-point receiver The second electro-hydraulic telescopic rod 45 arranged on the side anchors the second fixing mechanism 44 on the wall of the borehole.

As shown in Fig. 3 and Fig. 4, the electromagnetic wave receiver 20 is provided with a three-point positioning device 21 receiving channels. When the electromagnetic wave receiver 20 detects a plurality of disordered electromagnetic wave signals, the area classification is carried out according to the strength of the electromagnetic wave signals, and three points are selected. The location is used as the reference point 22, and tests are carried out at each reference point 22 to determine the incoming wave direction of each reference point 22, and gather the incoming wave directions of the three reference points 22. Again, by measuring the distance between the terminal and the starting point, as the radius of the circle of the three reference points 22, the three reference points 22 draw three circles, and the three arcs intersect at one point, which is the terminal position. Finally, the receiving point 23 is determined to receive the electromagnetic wave data emitted by the multiple FM beam meters; it is used to receive the electromagnetic wave data emitted by the multiple FM beam meters in real time, efficiently and accurately. When carrying out actual monitoring, the second fixing mechanism 44 and the second electro-hydraulic telescopic rod 45 firmly grasp the drilling rock wall to prevent the receiving unit 2 from sliding with the rock formation, so that the receiving unit 2 and the rock formation are integrated. An explosion-proof and waterproof casing 19 is arranged outside the receiving unit 2 for explosion-proof, waterproof, and instrument corrosion prevention. The receiving unit 2 can adopt a rectangular parallelepiped structure, and the middle part of the receiving unit 2 has a second reserved hole 46 for passing through. Specifically, the size of the hole is designed according to the actual needs of the site, and the purpose is to allow the connecting wire 13 to pass through.

Described processing unit 3 comprises main frame 24 and explosion-proof waterproof casing 19, and when monitoring, it is installed on ground surface 25, as shown in Figure 5, main frame 24 is made up of switch 26, drive module 27, control module 28, filter 29, processing module 30. It consists of a temperature sensing module 31, an automatic alarm module 32, a display imaging system 33, an electro-hydraulic telescopic rod start switch 34, and an electric pulley control lift switch 35. The driving module 27 and the control module 28 are used to control the opening and closing of the transmitting unit 1 , and they are connected together with the filter 29 through wires. The purpose of setting the filter 29 is to separate the required frequency components from the complex frequency components, filter out useless frequency components, and improve the analysis accuracy. It is connected together with the processing module 30 through wires. The processing module 30 is a socket that collects data from the outside of the host software and inputs the data into the host software. It has data processing, terrain correction and preliminary determination of each layered structure, crack, Preprocessing functions such as space separation layer 14 are the key links to realize data sharing. It is connected together with the temperature sensing module 31 through wires. The temperature sensing module 31 is used to monitor the temperature of the mine and the instrument and converts it into a signal output to the host computer 24. The setting purpose of the temperature sensing module 31 is to be used for mine explosion-proof safety monitoring. , Improve mine productivity. It is connected together with the automatic alarm module 32 through wires. The automatic alarm module 32 is used to automatically monitor the size of the separation layer 14 and the safety and explosion protection. Immediately start the automatic alarm module 32, to reduce the probability of disaster accidents. The automatic alarm module 32 is connected with the display instrument imaging system 33 through wires, and the display instrument imaging system 33 receives the data transmitted by the processing module 30, draws the information of the change of rock formation resistivity with depth, and at the same time, organizes and analyzes the monitoring data to form The apparent resistivity contour map reflects the lithological characteristics of the formation through the apparent resistivity curve, and uses resistivity tomography technology for data collection and computer processing. Output the results in the form, establish the spatial geometric model of the full-section overlying rock structure and the separation layer 14, and obtain the full-section motion state diagram of the overlying rock layer, including the structure of each layer, cracks, and separation layers 14 in spatial distribution. The electro-hydraulic telescopic rod activation switch 34 is located below the display imaging system 33 and is used to control the stretching of the first electro-hydraulic telescopic rod 10 and the second electro-hydraulic telescopic rod 45 . The electric pulley control lift switch 35 is located below the display imaging system 33 and is used to control the lifting of the first electric pulley 4 and the second electric pulley 43 .

It can be understood that the electrical resistivity tomography technology borrows the concept and principle of X-ray CT scanning imaging in medicine, and uses the ground surface 25, drill holes or underground roadways to arrange transmitting points and receiving points, and receives internal information of the target body. After the data is obtained, it is used to reconstruct the distribution of physical properties inside the probe body, etc. The electrical resistivity tomography system mainly includes two parts: data acquisition and computer processing. During on-site measurement, all the electrodes are arranged on the measuring points at a certain interval, and the multi-core cable is connected to the program-controlled switch. Acquisition, and then perform tomography processing on the collected data through the computer, and output the results in a certain graphic image form. Three-dimensional resistivity tomography technology has the characteristics of high measuring point density and high work efficiency. Therefore, resistivity tomography 3D imaging technology can be applied to engineering practice.

As shown in Figure 6, the monitoring work selects the middle position point 39 located on the track chute 40 from the cut eye 36 to the production stop line 37, and advances vertically from the track chute 40 of the working face to the return air chute 38 of the working face, A frequency-modulated periodic pulse electromagnetic device is arranged every 30 meters, and the drilling position distribution structure 41 is shown in FIG. 7 .

As shown in Fig. 8, the ground surface 25 is selected as the reference plane, and according to the mine pressure and mechanical theory calculations, the theoretical prediction may occur at the location of the separation layer 14, and the monitoring boreholes are arranged from the ground surface 25, and the borehole 5 is drilled to the bottom of the bending zone. Fix the transmitting unit 1 and the receiving unit 2 in the monitoring device 11 to the bottom of the borehole, set the data collection interval of the host computer 24, open the switch 26 of the host computer 24, operate the driving module 27 and the control module 28, and the monitoring device 11 The power supply system 6 of the transmitting unit 1 provides a periodic pulsed electromagnetic wave, and the frequency modulation is processed by the frequency conversion device 7. The frequency-modulated periodic pulsed electromagnetic wave is sent by the arc convex coil 15, and is received by the electromagnetic wave receiver in the receiving unit 2 of the monitoring device 11. 20 is received after being processed by the three-point positioning method, the shape of the electromagnetic field 42 is shown in Figure 8, and the monitoring radius is from a to d.

The receiving unit 2 receives the signal and transmits it to the filter 29 of the processing unit 3, separates the required frequency component from the complex frequency component and transmits it to the processing module 30, and the processing module 30 performs preprocessing such as data processing and terrain correction on the data , to preliminarily determine the movement state of the entire section of the overlying strata, including the layered structure, cracks, and spatial forms of the separation layer 14. At the same time, analyze the data of the temperature sensing module 31 to determine whether there is a dangerous area. The zone will activate the automatic alarm module 32. This is followed by plotting formation resistivity versus depth information. At the same time, sort out and analyze the monitoring data to form an apparent resistivity contour map, reflect the lithological characteristics of the formation through the apparent resistivity curve, and use resistivity tomography technology for data acquisition and computer processing. The tomographic imaging process outputs the results in a certain graphic image form, and transmits the data to the display imaging system 33 to establish the full-section overlying rock structure and the spatial geometric model of the separation layer 14 located at the bottom of the borehole 5. The full-section motion state diagram of the overlying strata at the bottom includes the structure of each layer, cracks, and separated layers 14 in spatial distribution. According to the constructed full-section overlying rock structure at the bottom of the borehole 5 and the spatial geometric structure model of the separation layer 14, it is fed back to the host computer 24, and the host computer 24 controls the power supply system 6 in the transmitting unit 1 to provide pulsed electromagnetic waves with different periodicities in a targeted manner. The frequency conversion device 7 performs targeted frequency modulation according to the overlying rock structure of the entire section and the different rock properties around the separation layer 14. Low-frequency electromagnetic waves are used for relatively hard rocks, and high-frequency electromagnetic waves are used for weak rocks. The frequency of the frequency conversion device 7 is controlled by the oscillator. Generated, the frequency is selected through the frequency selection network, and the signal of a specific frequency is selected according to the nature of the rock, so as to more accurately explore the movement state of the entire section of the overlying rock at the bottom of the borehole. Repeat the above series of operations such as transmitting, receiving, and processing to obtain an accurate full-section overlying rock structure and spatial geometric structure model of the separation layer 14 at the bottom of the borehole. Next, control the electro-hydraulic telescopic rod start switch 34 and the electric pulley control lifting switch 35 through the host computer 24, shrink the first electro-hydraulic telescopic rod 10, the second electro-hydraulic telescopic rod 45, and promote the first electric pulley 4 and the second electric pulley. 43. Lift the transmitting unit 1 and the receiving unit 2 to the middle of the borehole 5, extend the first electro-hydraulic telescopic rod 10 and the second electro-hydraulic telescopic rod 45, and anchor the transmitting unit 1 and the receiving unit 2 tightly in the borehole 5. In the middle of the hole wall, repeat all the above operations such as transmitting signals, receiving signals, and processing signals, and record the information on the change of rock formation resistivity with depth to form an apparent resistivity contour map, and reflect the lithological characteristics of the formation through the apparent resistivity curve , using resistivity tomography technology for data acquisition and computer processing, the collected data is processed by tomography, and the results are output in a certain graphic image form, and the full-section overlying rock structure and abscission layer located in the middle of borehole 5 are established. 14 spatial geometry models. Again, control the electro-hydraulic telescopic rod start switch 34 and the electric pulley control lifting switch 35 through the main frame 24, shrink the first electro-hydraulic telescopic rod 10, the second electro-hydraulic telescopic rod 45, and promote the first electric pulley 4 and the second electric pulley 43 , lift the transmitting unit 1 and the receiving unit 2 to the upper part of the borehole, extend the first electro-hydraulic telescopic rod 10 and the second electro-hydraulic telescopic rod 45, and anchor the transmitting unit 1 and the receiving unit 2 tightly in the borehole 5 On the upper part of the wall, repeat all the above operations such as transmitting, receiving, and processing, and record the information on the change of rock resistivity with depth to form an apparent resistivity contour map. The apparent resistivity curve reflects the lithological characteristics of the formation. Analytical imaging technology is used for data collection and computer processing, and the collected data is processed by tomography, and the results are output in a certain graphic image form, and the spatial geometric model of the full-section overlying rock structure and abscission layer 14 located at the upper part of the borehole is established. Summarize the relevant data on the full-section overlying rock structure detected by the transmitting unit 1 and receiving unit 2 on the upper, middle, and bottom of the borehole 5 and the spatial geometric model of the abscission layer 14, and establish a motion state model for the entire full-section of the overlying rock layer. Including the geometric model of each layered structure, cracks and separation layer 14 space shape.

Embodiment 2, the technical solution will be further described by taking the application of the full-section overlying rock structure and the frequency-modulated periodic pulse electromagnetic device of the separation layer 14 as an example in all underground spaces that can be drilled.

The scheme described in Embodiment 1 can be used for the full-section overlying rock structure and the separation layer 14 frequency-modulated periodic pulse electromagnetic device provided in this application.

As a preferred solution of the present invention, the power supply system 6 uses periodic pulsed electromagnetic waves to periodically emit pulsed electromagnetic waves to improve the strength and pertinence of the exploration signal.

As a preferred solution of the present invention, the frequency conversion device 7 will modulate the strength of the signal by changing the frequency of the oscillating current according to the different rock properties around the separation layer 14, using low-frequency electromagnetic waves for harder rocks, and adopting low-frequency electromagnetic waves for weak rocks. High-frequency electromagnetic waves are used to improve the accuracy of monitoring the entire cross-section of the overlying rock formation, including various layered structures, cracks, and separation layers.

As a preferred solution of the present invention, the transmitting coil 8 is composed of an arc-shaped convex coil 15, and by increasing the number of winding turns of the original coil 18, the area of the magnetic field intensity generated by the transmitting coil 8 is increased to enhance the intensity of the transmitting signal .

As a preferred solution of the present invention, the electromagnetic wave receiver 20 is provided with a three-point positioning receiving channel for receiving a plurality of electromagnetic wave data transmitted from the transmitting unit 1 in real time.

As a preferred solution of the present invention, the automatic alarm module 32 is used to automatically monitor the scale of the separation layer 14, the temperature of the instrument and the mine. The automatic alarm module 32 is activated when the width of the separation layer 14 exceeds 10 cm, the temperature is lower than 0 degrees Celsius, and the temperature is higher than 40 degrees Celsius.

As shown in Figure 9, the embodiment of the present invention also provides a monitoring method of a full-section overlying rock structure and a layer-separated frequency-modulated periodic pulse electromagnetic device, including the following steps:

S101, selecting the ground surface 25 as a reference plane, and theoretically predicting the position where the separation layer 14 may appear according to mine pressure and mechanical theory calculations;

Arranging boreholes 5 from the surface 25, drilling the boreholes 5 to the bottom of the curved zone, and designing the relevant parameters of the boreholes 5;

S102, performing drilling construction according to the design parameters of the drilling;

S103, installing the monitoring device 11;

S104, monitoring and collecting data;

For the monitoring work, the middle position point 39 located on the track chute 40 from the cutting eye 36 to the production stop line 37 is selected, and the track chute 40 of the working face is advanced to the return air chute 38 of the working face in the vertical direction, and a monitoring station is arranged every 30m. The device 11 sets the data collection interval of the host computer 24 . The monitoring cycle of this measurement work is real-time monitoring; as shown in Figure 6 and Figure 7;

S105, Determination of the full-section overlying rock structure and the space range of the separation layer 14;

The transmitting unit 1 and the receiving unit 2 of the monitoring device 11 are put into the bottom of the borehole 5 through the first electric pulley 4 and the second electric pulley 43, and the first electric hydraulic telescopic rod 10 and the second electric hydraulic telescopic rod 45 Anchor it to the wall of the borehole 5. The host computer 24 sends action instructions to the transmitting unit 1 through the drive module 27, the control module 28, and the connecting wire 13. The power supply system 6 in the transmitting unit 1 generates periodic pulsed electromagnetic waves, and the frequency conversion device 7 modulates the strength of the periodic pulsed electromagnetic wave signal. , the electromagnetic wave is sent out through the arc convex coil 15, and the receiving unit 2 receives the electromagnetic wave through the three-point positioning method and then transmits it to the filter 29 in the host computer 24 of the processing unit 3 through the connecting wire 13, and the filter 29 filters out useless data and sends the The data is transmitted to the processing module 30 in the host computer 24, and the processing module 30 performs distortion point elimination, terrain correction, and preliminary determination of the movement state of the entire section of the overlying strata, including the preprocessing of each layered structure, cracks, and the spatial form of the separation layer 14. , plotting formation resistivity versus depth information. At the same time, sort out and analyze the monitoring data to form an apparent resistivity contour map, reflect the lithological characteristics of the formation through the apparent resistivity curve, and use resistivity tomography technology for data acquisition and computer processing. Tomography processing, output results in a certain graphic image form, establish the full-section overburden structure at the bottom of borehole 5 and the spatial geometric model of the separation layer 14, and obtain the full-section motion state diagram of the overlying strata at the bottom of borehole 5 , including various layered structures, cracks, space separation layers 14, etc., are displayed on the display imaging system 33 of the host computer. According to the constructed full-section overlying rock structure and the spatial geometric structure model of the separation layer 14, it is fed back to the host 24, and the host 24 controls the power supply system 6 in the transmitting unit 1 to provide pulsed electromagnetic waves of different periods in a targeted manner, and controls the frequency conversion device 7 According to the full-section overlying rock structure and the different rock properties around the abscission layer 14 space geometric structure model, frequency modulation is carried out in a targeted manner. For harder rocks, low-frequency electromagnetic waves are used, and for weak rocks, high-frequency electromagnetic waves are used. Repeat the above-mentioned transmission, reception, and processing. A series of operations to record the information on the change of rock formation resistivity with depth, form the apparent resistivity contour map, reflect the lithological characteristics of the formation through the apparent resistivity curve, and use resistivity tomography technology for data acquisition and computer processing. The collected data is processed by tomography, and the results are output in a certain graphic image form, and the exact full-section overlying rock structure at the bottom of the borehole 5 and the spatial geometric model of the separation layer 14 are established. During this period, the temperature sensing module 31 and the automatic alarm module 32 will carry out information transmission in real time, and automatically judge whether there is a dangerous area. If there is a dangerous area, the automatic alarm module 32 will be enabled; again, the transmitting unit 1 and receiving unit 2 of the monitoring device 11 Through the first electric pulley 4, the second electric pulley 43, the first electrohydraulic telescopic rod 10, and the second electrohydraulic telescopic rod 45, it is lifted to the middle of the borehole 5, and all operations such as the above-mentioned launching, receiving, and processing are repeated to establish a position in the borehole. The full-section overlying rock structure in the middle of 5 and the spatial geometry model of the separation layer 14. Lift the transmitting unit 1 and receiving unit 2 of the monitoring device 11 to the top of the borehole 5 again, repeat all the above-mentioned operations such as transmitting, receiving, and processing, and establish the spatial geometric model of the full-section overlying rock structure and the separation layer 14 located at the upper part of the borehole 5 . Summarize the relevant data on the full-section overlying rock structure and the spatial geometric model of the separation layer 14 detected at the upper, middle, and bottom of the borehole 5, and establish an exact and complete full-section overlying rock structure and the spatial range geometric model of the separation layer 14 .

As a preferred solution of the present invention, in step S101, the relevant parameters of the borehole 5 include the number of boreholes, arrangement spacing, borehole length, inclination angle and aperture;

As a preferred solution of the present invention, in steps S101-S105 of the present invention, the transmitting unit 1, the receiving unit 2, and the processing unit 3 are all provided with an explosion-proof and waterproof casing 19 for explosion-proof, waterproof, and instrument corrosion prevention.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

The information interaction and execution process between the above-mentioned devices/units are based on the same idea as the method embodiment of the present invention, and its specific functions and technical effects can be found in the method embodiment section, and will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used for illustration. In practical applications, the above-mentioned functions can be assigned to different functional units, Completion of modules means that the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit 3, or each unit can exist separately physically, or two or more units can be integrated in one unit, and the above-mentioned integrated units can adopt hardware It can also be implemented in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present invention. For the specific working process of the units and modules in the above system, reference may be made to the corresponding process in the foregoing method embodiments.

Based on the technical solutions described in the above-mentioned embodiments of the present invention, the following application examples can be further proposed.

According to an embodiment of the present application, the present invention also provides a computer device, which includes: at least one processor, a memory, and a computer program stored in the memory and operable on the at least one processor, When the processor executes the computer program, the steps in any of the foregoing method embodiments are implemented.

An embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.

The embodiment of the present invention also provides an information data processing terminal, the information data processing terminal is used to provide a user input interface to implement the steps in the above-mentioned method embodiments when the information data processing terminal is implemented on an electronic device, the information data Processing terminals are not limited to mobile phones, computers, and switches.

The embodiment of the present invention also provides a server, which is configured to provide a user input interface to implement the steps in the foregoing method embodiments when executed on an electronic device.

The embodiment of the present invention also provides a computer program product, which, when the computer program product is run on the electronic device, enables the electronic device to implement the steps in the foregoing method embodiments.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the procedures in the method of the above-mentioned embodiments in the present application can be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. The computer program When executed by a processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program codes to a photographing device/terminal device, a recording medium, a computer memory, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), electrical carrier signals, telecommunication signals, and software distribution media. Such as U disk, mobile hard disk, magnetic disk or optical disk, etc.

The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field is within the technical scope disclosed in the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles shall fall within the protection scope of the present invention.

Claims (10)

1. A full-section overlying rock structure and a layer-separated frequency-modulated periodic pulse electromagnetic device, characterized in that the device includes a monitoring device (11), and the monitoring device (11) includes: a transmitting unit (1), a receiving unit ( 2) and processing unit (3); The transmitting unit (1) transmits the frequency-modulated periodic pulsed electromagnetic wave to the receiving unit (2) through the integrated arc convex coil (15); The receiving unit (2) receives the frequency-modulated periodic pulsed electromagnetic wave sent by the transmitting unit (1), and obtains the form of the electromagnetic field (42) after being processed by the integrated electromagnetic wave receiver (20) through the three-point positioning method, and sending the form of the electromagnetic field (42) to the processing unit (3); the form of the electromagnetic field (42) includes monitoring radius, total field strength, amplitude, phase and direction of the electromagnetic field, and the law of the electromagnetic field changing with space; The processing unit (3) receives the signal sent by the receiving unit (2), and performs signal processing to obtain a motion state model of the entire cross-section of the overlying rock stratum, the motion state model includes each layered structure, cracks and separation Layer (14) spatial form geometry model. 2. The full-section overlying rock structure and separation-layer frequency-modulated periodic pulse electromagnetic device according to claim 1, characterized in that, the transmitting unit (1) includes a frequency-modulated beam meter, and when monitoring, it passes through the first electric pulley (4) into the borehole (5); The frequency modulation beam meter includes a power supply system (6), a frequency conversion device (7), a transmitting coil (8) and a first fixing mechanism (9), and a first electrohydraulic telescopic rod is arranged on the left side of the frequency modulation beam meter (10) Anchor the first fixing mechanism (9) on the wall of the borehole (5), and set the first electric pulley (4) on the right side of the FM beam meter to control the lifting of the transmitting unit (1). The middle part of the type beam meter is used to pass through the first reserved hole (12) for connecting wires (13) to pass through and connect with the receiving unit (2). 3. The full-section overlying rock structure and separated layer frequency-modulated periodic pulse electromagnetic device according to claim 2, characterized in that the power supply system (6) is set at the upper left inside the frequency-modulated beam meter, and consists of an oscillator, Composed of a transmission line and a dipole antenna, it is used to generate periodic pulsed electromagnetic waves, and is connected to the frequency conversion device (7) through wires; The frequency conversion device (7) is arranged on the upper right inside the frequency modulation beam meter, and is connected with the transmitting coil (8) through wires, and the frequency conversion device (7) is used to modulate the transmission by changing the frequency of the oscillating current The strength of the signal, launching electromagnetic waves of different strengths for different rock types; The transmitting coil (8) is arranged under the inside of the frequency modulation beam meter, and is composed of a circular arc convex coil (15), a magnetic isolation plate (16), and a connecting wire (17), and is used for transmitting periodic pulsed electromagnetic waves; The arc-shaped convex coil (15) is used to increase the strength of the transmitted signal by increasing the number of turns of the original coil (18). 4. The full-section overlying rock structure and separated-layer frequency-modulated periodic pulse electromagnetic device according to claim 2, characterized in that an explosion-proof and waterproof casing (19) is set outside the transmitting unit (1) for explosion-proof, waterproof, Prevent instrument from rusting. 5. The full-section overlying rock structure and layer-separation frequency-modulated periodic pulse electromagnetic device according to claim 3, characterized in that, the receiving unit (2) includes a three-point receiver, and during monitoring, the second electric pulley ( 43) into the borehole (5), the three-point receiver is composed of an electromagnetic wave receiver (20) and a second fixing mechanism (44); the second electro-hydraulic telescopic rod (45) set on the left side of the three-point receiver, will The second fixing mechanism (44) is anchored on the hole wall of the borehole (5). 6. The full-section overlying rock structure and separation layer frequency-modulated periodic pulse electromagnetic device according to claim 5, characterized in that the electromagnetic wave receiver (20) is used to receive electromagnetic wave data emitted by the frequency-modulated beam instrument. 7. The full-section overlying rock structure and separated-layer frequency-modulated periodic pulse electromagnetic device according to claim 5, characterized in that, the receiving unit (2) is provided with an explosion-proof and waterproof casing (19) for explosion-proof, waterproof, To prevent the instrument from rusting; the middle part of the receiving unit (2) is reserved for passing through the second reserved hole (46), so that the connecting wire (13) can pass through and be connected with the processing unit (3). 8. The full-section overlying rock structure and layer-separation frequency-modulated periodic pulse electromagnetic device according to claim 1, characterized in that the processing unit (3) includes a host (24) and an explosion-proof and waterproof casing (19). When installed on the surface (25), the host (24) consists of a switch (26), a drive module (27), a control module (28), a filter (29), a processing module (30), a temperature sensing module ( 31), automatic alarm module (32), display imaging system (33), electro-hydraulic telescopic rod start switch (34), electric pulley control lift switch (35); The drive module (27) and the control module (28) are used to control the opening and closing of the transmitting unit (1), and are connected to the filter (29) through wires; the filter (29) is used to obtain complex frequency components The required frequency components are separated from the computer, and connected to the processing module (30) through wires; the processing module (30) collects data from the outside of the host software and inputs the data into a socket inside the host software for data processing and terrain correction And initially determine the pretreatment of each layered structure, crack, and separation layer (14), and connect with the temperature sensing module (31) through a wire; the temperature sensing module (31) is used to monitor the temperature of the mine and the instrument and convert it into The signal is output to the host (24), and connected to the automatic alarm module (32) through wires, the automatic alarm module (32) is used to automatically monitor the size of the separation layer (14) and the safety of explosion-proof, the automatic alarm module (32) Connecting with the display imaging system (33) through wires, the display imaging system (33) receives the data transmitted by the processing module (30), and draws the information on the change of rock formation resistivity with depth; The electro-hydraulic telescopic rod activation switch (34) is located below the display imaging system (33), and is used to control the stretching of the first electro-hydraulic telescopic rod (10) and the second electro-hydraulic telescopic rod (45); the electric pulley control The lift switch (35) is located below the display imaging system (33), and is used to control the lift of the first electric pulley (4) and the second electric pulley (43). 9. A full-section overlying rock structure and separation layer frequency modulation periodic pulse electromagnetic monitoring method, characterized in that the full-section overlying rock structure and separation layer frequency modulation periodic pulse electromagnetic device described in any one of claims 1-8 is used To implement signal monitoring, the method selects the ground surface (25) as a reference plane, and predicts the location of the separation layer (14) according to mine pressure and mechanical theory calculations, specifically including the following steps: S1, using the circular arc convex coil (15) to send and receive the periodic pulsed electromagnetic waves after frequency modulation processing (2); S2, the receiving unit (2) obtains the form of the electromagnetic field (42) after being processed by the integrated electromagnetic wave receiver (20) through the three-point positioning method, and sends the form of the electromagnetic field (42) to the processing unit (3); Electromagnetic field (42) form includes monitoring radius, total field strength, amplitude, phase and direction of electromagnetic field, and the law of electromagnetic field changing with space; S3, the processing unit (3) receives the signal sent by the receiving unit (2), and performs signal processing to obtain the motion state model of the entire cross-section of the Layer (14) spatial form geometry model. 10. The full-section overlying rock structure and separation layer frequency-modulated periodic pulse electromagnetic monitoring method according to claim 9, characterized in that, in step S2, the three-point positioning method includes: setting three points through the electromagnetic wave receiver (20) The receiving channel of the positioning device (21), when the electromagnetic wave receiver (20) detects multiple disordered electromagnetic wave signals, classifies the area according to the strength of the electromagnetic wave signal, selects three positions as reference points (22), and at each reference point ( 22) Perform a test to determine the incoming wave direction of each reference point (22), and gather the incoming wave directions of the three reference points 22; again, measure the distance between the terminal and the starting point as the radius of the circle of the three reference points (22) , three reference points (22) draw three circles, the three arcs intersect at one point, and the intersection point is the terminal position; finally determine the receiving point (23) to receive the electromagnetic wave data emitted by multiple FM beam meters.

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