Underground coal mine drilling micro-motion surface wave signal monitoring device and signal receiving method

Abstract

The invention discloses a coal mine underground drilling micro-motion surface wave signal monitoring device and a signal receiving method. The device comprises a signal receiving circuit, a digital-to-analog conversion circuit, a signal conditioning circuit and a signal transmission circuit. The signal receiving circuit is connected with the digital-to-analog conversion circuit, the digital-to-analog conversion circuit is connected with the signal conditioning circuit, and the signal conditioning circuit is connected with the signal transmission circuit. According to the invention, a simple circuit design thought is adopted, and the space occupied by the circuit is reduced as much as possible while the purposes of signal receiving and processing can be achieved; a modular design method is adopted, so that rapid transmission and processing of signals between circuits are realized; the overall power consumption is low and the use efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of geophysical data monitoring technology in underground coal mine boreholes, and relates to a micro-motion surface wave signal monitoring device and signal receiving method for underground coal mine boreholes. Background Technology

[0002] Microseismic monitoring technology is a high-tech field that has emerged in recent years. It utilizes principles of acoustic emission, seismology, and geophysics, along with computer processing, to identify and locate the intensity of microseismic events. This technology possesses the capability for long-term continuous monitoring and is characterized by its long-distance, dynamic, and real-time nature.

[0003] Microseismic monitoring sensors typically need to be pre-fixed in the surrounding rock area being monitored. To accurately pinpoint locations prone to rock failure and dynamic hazards using microseismic technology, the sensors must be arranged in a three-dimensional spatial distribution around the monitored rock mass. The more sensors present and the more rationally distributed they are, the more accurate the monitoring results. Microseismic sensors are expensive. To reduce project costs by retrieving the sensors after monitoring, on-site installation of microseismic monitoring sensors in engineering projects usually involves placing them directly into monitoring holes.

[0004] Microseismic monitoring technology is a geophysical technique that monitors the impact and effects of production activities and the underground state by observing and analyzing minute seismic events generated during production activities. It involves deploying geophone arrays in the mine or on the surface to receive minute seismic events generated or induced during coal mining. Parameters such as the location of the seismic source are obtained through inversion of these events. Finally, these parameters are used to obtain parameters such as the spatial location and magnitude of the microseismic source. Microseismic monitoring technology can be applied in coalfield geological exploration to monitor illegal mining in small coal mines, monitor the height of the "three zones" (seismic zone, seismic zone, and seismic zone) in goaf areas, monitor the effects of hydraulic fracturing, and monitor rockburst.

[0005] Currently, the main targets of microseismic monitoring are transverse and longitudinal waves propagating in the strata. However, due to the limited signal parameters, it is impossible to fully monitor other types of seismic waves propagating in the strata, such as surface waves. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a micro-motion surface wave signal monitoring device and signal receiving method for underground boreholes in coal mines, so as to solve the above-mentioned problems in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A micro-motion surface wave signal monitoring device for underground boreholes in coal mines includes a signal receiving circuit, a digital-to-analog conversion circuit, a signal conditioning circuit, and a signal transmission circuit; the signal receiving circuit is connected to the digital-to-analog conversion circuit, the digital-to-analog conversion circuit is connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the signal transmission circuit.

[0009] The present invention also includes the following technical features:

[0010] Specifically, the signal receiving circuit can receive micro-motion surface wave signals from the borehole formation; the signal receiving circuit includes: resistors R21, R22, R23, R24, R25, R26, R27, R28, and R29; capacitors C21, C22, C23, C24, C25, C26, and C27; diode D21; power supply V21; power supply V22; power supply V23; and operational amplifier IC21; wherein:

[0011] Power supply V21 is connected to the first terminal of resistor R21. The second terminal of resistor R21 is connected to the first terminals of capacitor C21 and resistor R23. The second terminal of capacitor C21 is connected to the first terminal of resistor R22 and pin 1 of operational amplifier IC21. The second terminal of resistor R22 is connected to the first terminal of capacitor C22. The second terminal of capacitor C22 is connected to pin 5 of operational amplifier IC21. The first terminals of capacitors C23 and C25 are connected. The second terminal of capacitor C25 is connected to the first terminal of diode D21. The first terminals of capacitors C27 and C26 are connected. The second terminal of capacitor C26 is connected to the second terminal of resistor R27 and resistor R2... 9. The first terminal of resistor R27 is connected to the first terminal of resistor R28 and the second terminal of capacitor C27. The second terminal of capacitor C23 is connected to the first terminal of resistor R26, the first terminal of capacitor C24, and the second terminal of resistor R25. The first terminals of resistor R25 and R24 are connected to the second pin of operational amplifier IC21. The third and fourth pins of operational amplifier IC21 are connected to power supply V22 and power supply V23, respectively. The second terminal of resistor R23 is connected to the second terminal of resistor R24, the second terminal of capacitor C24, the second terminal of resistor R26, the second terminal of diode D21, the second terminal of resistor R28, and the second terminal of resistor R29.

[0012] Specifically, the digital-to-analog converter circuit can perform digital-to-analog conversion of the received signal; the digital-to-analog converter circuit includes: resistors R31, R32, R33, R34, and R35; capacitors C31 and C32; power supplies V31, V32, V33, V34, and V35; operational amplifier IC31; and integrated chip U31; wherein:

[0013] The OUT pin of chip U31 is connected to the first end of resistor R31. The second end of resistor R31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first ends of resistor R35, the second end of resistor R34, and pin 1 of op-amp IC32. The second end of resistor R35 is connected to pin 5 of op-amp IC32. Pins 3 and 4 of op-amp IC32 are powered by power supplies V34 and V35, respectively, and pin 2 is grounded. The first end of resistor R34 is connected to the first end of capacitor C32, the second end of capacitor C31, and pin 5 of op-amp IC31. The first end of capacitor C31 is connected to the second end of resistor R32. The first end of resistor R32 is connected to the VER pin of U31. Pin 1 of op-amp IC31 is connected to the VDD pin, pin 2 is connected to the VCC pin, pins 3 and 4 are powered by power supplies V31 and V32, respectively, and the second end of capacitor V32 is connected to power supply V33.

[0014] Specifically, the signal conditioning circuit can perform signal conditioning and calculation; the signal conditioning circuit includes: resistors R41, R42, R43, R44, R45, and R46; capacitors C41, C42, and C43; diode D41; power supplies V41, V42, V43, V44, and V45; and operational amplifier IC41; wherein:

[0015] The second terminal of resistor R41 is connected to the first terminal of diode D41, the first terminal of resistor R43, capacitor C41, and the first terminal of resistor R45. The second terminal of diode D41 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is grounded. The second terminal of resistor R43 is connected to the second terminal of capacitor C41 and grounded. The first terminal of resistor R44 is grounded, and the second terminal is connected to the first terminal of resistor R46 and grounded. The second terminal of resistor R46 is connected to power supply V41. The first terminal of capacitor C42 is connected to power supply V44, and the second terminal is connected to the second terminal of capacitor C43 and power supply V45. One pin of operational amplifier IC41 is connected to the second terminals of resistors R44 and R46. The second pin is connected to the second terminal of resistor R45. The third and fourth pins are connected to power supplies V42 and V43 respectively. The fifth pin is connected to the first terminal of capacitor C43.

[0016] Specifically, the signal transmission circuit enables efficient and stable signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, and R54; capacitors C51, C52, and C53; power supplies V51, V52, and V53; and integrated chip U51.

[0017] The first terminal of resistor R51 is grounded, and the second terminal is connected to power supply V51, the first terminal of capacitor C51, and the VCC pin of U51. The second terminal of capacitor C51 is connected to the VDD pin, the AGND pin is grounded, the DATA pin is connected to the first terminal of resistor R52, the DGND pin is connected to power supply V53 and the first terminal of resistor R53, the second terminal of resistor R53 is grounded, resistor R52 is connected to the DAT pin of U52, the GND1 and GND2 pins of U52 are connected to the second terminal of capacitor C52 respectively, the first terminal of capacitor C52 is grounded, the VSS pin of U52 is connected to power supply V52 and the first terminal of capacitor V53, the GND pin is connected to the first terminal of resistor R54, and the second terminal of resistor R54 is grounded.

[0018] A method for monitoring and receiving micro-motion surface wave signals from underground coal mine boreholes, the method being implemented based on the aforementioned micro-motion surface wave signal monitoring device for underground coal mine boreholes, includes the following steps:

[0019] Step 1: The signal receiving circuit acquires signals from the formation in the borehole;

[0020] Step 2: The digital-to-analog converter circuit performs digital-to-analog conversion on the received signal to obtain the processed signal, and then transmits the processed signal to the signal conditioning circuit;

[0021] Step 3: The signal conditioning circuit receives the signal processed by the digital-to-analog converter circuit, performs further calculations on the processed signal, and then transmits the calculated signal to the signal transmission circuit.

[0022] Step 4: The signal transmission circuit receives the processed signal and transmits it to the ground host computer.

[0023] Compared with the prior art, the present invention has the following technical effects:

[0024] (1) Since the micro-motion surface wave signal monitoring device for underground coal mine boreholes is used in boreholes and the space is small, the circuit design adopts a simple design concept to minimize the space occupied by the circuit while achieving the goal of signal reception and processing.

[0025] (2) The device of the present invention adopts a modular design method, which realizes the rapid transmission and processing of signals between circuits; the overall power consumption of the device is small and the efficiency of use is high.

[0026] (3) This invention avoids detection errors, prevents the drift of the working frequency, and ensures that it is portable underground, thereby promoting the development and application of underground coal mine exploration technology. Attached Figure Description

[0027] Figure 1 The structural diagram of the micro-motion surface wave signal monitoring device for underground boreholes in coal mines provided by the present invention;

[0028] Figure 2 This is a schematic diagram of the signal receiving circuit provided by the present invention;

[0029] Figure 3 This is a schematic diagram of the digital-to-analog converter circuit provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the signal conditioning circuit provided by the present invention;

[0031] Figure 5 This is a schematic diagram of the signal transmission circuit provided by the present invention;

[0032] Figure 6 The flowchart of the method for monitoring micro-motion surface wave signals in underground coal mine boreholes provided by the present invention is shown.

[0033] Figure 7 This is a map showing the detection results without using this device;

[0034] Figure 8 The image shows the detection results after using this device, as provided by the present invention. Detailed Implementation

[0035] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0036] Example:

[0037] This embodiment provides a micro-motion surface wave signal monitoring device for underground boreholes in coal mines, such as... Figure 1 As shown, the device includes a signal receiving circuit, a digital-to-analog converter circuit, a signal conditioning circuit, and a signal transmission circuit; the signal receiving circuit is connected to the digital-to-analog converter circuit, the digital-to-analog converter circuit is connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the signal transmission circuit.

[0038] Signal receiving circuit, such as Figure 2 As shown, it can receive micro-motion surface wave signals from the borehole formation; the signal receiving circuit includes: resistors R21, R22, R23, R24, R25, R26, R27, R28, and R29; capacitors C21, C22, C23, C24, C25, C26, and C27; diode D21; power supplies V21, V22, and V23; and operational amplifier IC21, which is an LM358.

[0039] Power supply V21 is connected to the first terminal of resistor R21. The second terminal of resistor R21 is connected to the first terminals of capacitor C21 and resistor R23. The second terminal of capacitor C21 is connected to the first terminal of resistor R22 and pin 1 of operational amplifier IC21. The second terminal of resistor R22 is connected to the first terminal of capacitor C22. The second terminal of capacitor C22 is connected to pin 5 of operational amplifier IC21. The first terminals of capacitors C23 and C25 are connected. The second terminal of capacitor C25 is connected to the first terminal of diode D21. The first terminals of capacitors C27 and C26 are connected. The second terminal of capacitor C26 is connected to the second terminal of resistor R27 and resistor R2... 9. The first terminal of resistor R27 is connected to the first terminal of resistor R28 and the second terminal of capacitor C27. The second terminal of capacitor C23 is connected to the first terminal of resistor R26, the first terminal of capacitor C24, and the second terminal of resistor R25. The first terminals of resistor R25 and R24 are connected to the second pin of operational amplifier IC21. The third and fourth pins of operational amplifier IC21 are connected to power supply V22 and power supply V23, respectively. The second terminal of resistor R23 is connected to the second terminal of resistor R24, the second terminal of capacitor C24, the second terminal of resistor R26, the second terminal of diode D21, the second terminal of resistor R28, and the second terminal of resistor R29.

[0040] The signal receiving circuit can control the receiving antenna in real time to receive signals of different frequencies, which improves the accuracy of the received signal and avoids interference from other external factors in the signal receiving process.

[0041] Digital-to-analog converter circuits, such as Figure 3 As shown, the circuit can perform digital-to-analog conversion of the received signal. The digital-to-analog conversion circuit includes: resistors R31, R32, R33, R34, and R35; capacitors C31 and C32; power supplies V31, V32, V33, V34, and V35; operational amplifier IC31 (model LM321); and integrated circuit U31 (model DAC8812).

[0042] The OUT pin of chip U31 is connected to the first end of resistor R31. The second end of resistor R31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first ends of resistor R35, the second end of resistor R34, and pin 1 of op-amp IC32. The second end of resistor R35 is connected to pin 5 of op-amp IC32. Pins 3 and 4 of op-amp IC32 are powered by power supplies V34 and V35, respectively, and pin 2 is grounded. The first end of resistor R34 is connected to the first end of capacitor C32, the second end of capacitor C31, and pin 5 of op-amp IC31. The first end of capacitor C31 is connected to the second end of resistor R32. The first end of resistor R32 is connected to the VER pin of U31. Pin 1 of op-amp IC31 is connected to the VDD pin, pin 2 is connected to the VCC pin, pins 3 and 4 are powered by power supplies V31 and V32, respectively, and the second end of capacitor V32 is connected to power supply V33.

[0043] The digital-to-analog converter circuit can perform digital-to-analog conversion of the received signal circuit in real time, which improves the signal conversion efficiency and avoids external interference factors, thus ensuring signal quality.

[0044] Signal conditioning circuits, such as Figure 4 As shown, it can perform signal conditioning and calculation; the signal conditioning circuit includes: resistors R41, R42, R43, R44, R45, and R46; capacitors C41, C42, and C43; diode D41; power supplies V41, V42, V43, V44, and V45; and operational amplifier IC41, which is an LM358.

[0045] The second terminal of resistor R41 is connected to the first terminal of diode D41, the first terminal of resistor R43, capacitor C41, and the first terminal of resistor R45. The second terminal of diode D41 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is grounded. The second terminal of resistor R43 is connected to the second terminal of capacitor C41 and grounded. The first terminal of resistor R44 is grounded, and the second terminal is connected to the first terminal of resistor R46 and grounded. The second terminal of resistor R46 is connected to power supply V41. The first terminal of capacitor C42 is connected to power supply V44, and the second terminal is connected to the second terminal of capacitor C43 and power supply V45. One pin of operational amplifier IC41 is connected to the second terminals of resistors R44 and R46. The second pin is connected to the second terminal of resistor R45. The third and fourth pins are connected to power supplies V42 and V43 respectively. The fifth pin is connected to the first terminal of capacitor C43.

[0046] Signal conditioning circuits shape the received signal, such as by changing the rise and fall times, to meet specific processing requirements. This can improve signal quality, enhance signal processing capabilities, and ensure stable signal transmission.

[0047] Signal transmission circuits, such as Figure 5 As shown, it can perform efficient and stable signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, and R54; capacitors C51, C52, and C53; power supplies V51, V52, and V53; integrated chip U51; integrated chip U52 is model HCPL0601; and integrated chip U52 is model PCA9617.

[0048] The first terminal of resistor R51 is grounded, and the second terminal is connected to power supply V51, the first terminal of capacitor C51, and the VCC pin of U51. The second terminal of capacitor C51 is connected to the VDD pin, the AGND pin is grounded, the DATA pin is connected to the first terminal of resistor R52, the DGND pin is connected to power supply V53 and the first terminal of resistor R53, the second terminal of resistor R53 is grounded, resistor R52 is connected to the DAT pin of U52, the GND1 and GND2 pins of U52 are connected to the second terminal of capacitor C52 respectively, the first terminal of capacitor C52 is grounded, the VSS pin of U52 is connected to power supply V52 and the first terminal of capacitor V53, the GND pin is connected to the first terminal of resistor R54, and the second terminal of resistor R54 is grounded.

[0049] The signal transmission circuit enables real-time signal transmission from the transmission control circuit, while the protection circuit operates under stable current conditions, ensuring the stable operation of other circuits.

[0050] This invention also provides a method for monitoring and receiving micro-motion surface wave signals in underground coal mine boreholes. This method is based on the aforementioned monitoring device for micro-motion surface wave signals in underground coal mine boreholes. The monitoring device and signal receiving method aim to obtain key parameters such as the mechanical properties, structural characteristics, and potential geological anomalies of the strata by monitoring the micro-motion surface wave signals of the strata surrounding the borehole. This method can effectively identify geological structures such as faults, fracture zones, and goafs, and provide early warnings of potential roof collapses, coal and gas outbursts, and water inrushes, providing important basis for optimizing coal mine mining plans and accurately implementing safety measures. Figure 6 As shown, the specific flow of this method is as follows:

[0051] Step 1: The signal receiving circuit acquires signals from the formation in the borehole;

[0052] Step 2: The digital-to-analog conversion circuit converts the received signal into a digital signal to obtain the processed signal. The surface wave sensor in the monitoring device collects the micro-motion surface wave signals propagating through the formation in real time. These signals are first converted into electrical signals, and then pre-amplified by the built-in preamplifier to enhance the signal strength for subsequent processing. The filtering circuit filters the signal to remove high-frequency noise interference generated by downhole electrical equipment, mechanical operation, etc., to ensure that the collected micro-motion surface wave signals are real and reliable and accurately reflect the formation characteristics. Then the processed signal is transmitted to the signal conditioning circuit.

[0053] Step 3: The signal conditioning circuit receives the signal processed by the digital-to-analog converter circuit and performs further calculations on the processed signal. Specifically, the calculations involve using advanced digital signal processing techniques, such as Fourier transform and wavelet analysis, to perform in-depth processing on the signal. Through Fourier transform, the time-domain micro-motion surface wave signal can be converted into a frequency-domain signal, and the frequency composition of the signal can be analyzed to extract the surface wave characteristics of different frequency components. Wavelet analysis can decompose the signal at different time scales to obtain the time-frequency characteristics of the signal and accurately capture the abrupt change information of the signal. These characteristic parameters are crucial for identifying geological anomalies in the strata. Then, the calculated signal is transmitted to the signal transmission circuit.

[0054] Step 4: The signal transmission circuit receives the signal processed by the signal conditioning circuit and transmits the processed signal to the ground host computer.

[0055] like Figure 7 The image shows the detection results without using the device provided by this invention. The result image is a monitoring result of micro-motion surface wave signals in a coal mine borehole. The horizontal axis represents the location of the monitoring point, and the vertical axis represents the monitoring depth. Figure 8 The image shows the results of detection using the device provided by this invention. The image is a monitoring result of micro-motion surface wave signals from a coal mine borehole; the horizontal axis represents the monitoring point location, and the vertical axis represents the monitoring depth. Figure 7 As can be seen, the curve contains only simple signal parameters, with limited parameter data, resulting in low resolution of the detection results and impacting the actual construction effectiveness in the later stages. For example... Figure 8 The results shown are those obtained using the device provided by this invention. The results reveal abundant signal curves in the image, indicating a regular variation in the values ​​of two formation parameters at different borehole depths. This variation in values ​​allows for the inference of formation information. Verification through tunnel excavation further demonstrates the accuracy of the detection results.

[0056] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0057] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0058] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A micro-motion surface wave signal monitoring device for underground coal mine boreholes, characterized in that, The device includes a signal receiving circuit, a digital-to-analog converter circuit, a signal conditioning circuit, and a signal transmission circuit; the signal receiving circuit is connected to the digital-to-analog converter circuit, the digital-to-analog converter circuit is connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the signal transmission circuit.

2. The coal mine underground borehole micro-motion surface wave signal monitoring device as described in claim 1, characterized in that, The signal receiving circuit can receive micro-motion surface wave signals from the borehole formation; the signal receiving circuit includes: resistors R21, R22, R23, R24, R25, R26, R27, R28, and R29; capacitors C21, C22, C23, C24, C25, C26, and C27; diode D21; power supply V21; power supply V22; power supply V23; and operational amplifier IC21; wherein: Power supply V21 is connected to the first terminal of resistor R21. The second terminal of resistor R21 is connected to the first terminals of capacitor C21 and resistor R23. The second terminal of capacitor C21 is connected to the first terminal of resistor R22 and pin 1 of operational amplifier IC21. The second terminal of resistor R22 is connected to the first terminal of capacitor C22. The second terminal of capacitor C22 is connected to pin 5 of operational amplifier IC21. The first terminals of capacitors C23 and C25 are connected. The second terminal of capacitor C25 is connected to the first terminal of diode D21. The first terminals of capacitors C27 and C26 are connected. The second terminal of capacitor C26 is connected to the second terminal of resistor R27 and resistor R2...

9. The first terminal of resistor R27 is connected to the first terminal of resistor R28 and the second terminal of capacitor C27. The second terminal of capacitor C23 is connected to the first terminal of resistor R26, the first terminal of capacitor C24, and the second terminal of resistor R25. The first terminals of resistor R25 and R24 are connected to the second pin of operational amplifier IC21. The third and fourth pins of operational amplifier IC21 are connected to power supply V22 and power supply V23, respectively. The second terminal of resistor R23 is connected to the second terminal of resistor R24, the second terminal of capacitor C24, the second terminal of resistor R26, the second terminal of diode D21, the second terminal of resistor R28, and the second terminal of resistor R29.

3. The coal mine underground borehole micro-motion surface wave signal monitoring device as described in claim 1, characterized in that, The digital-to-analog converter circuit can perform digital-to-analog conversion of the received signal; the digital-to-analog converter circuit includes: resistors R31, R32, R33, R34, and R35; capacitors C31 and C32; power supplies V31, V32, V33, V34, and V35; operational amplifier IC31; and integrated chip U31; wherein: The OUT pin of chip U31 is connected to the first end of resistor R31. The second end of resistor R31 is connected to the first end of resistor R33. The second end of resistor R33 is connected to the first ends of resistor R35, the second end of resistor R34, and pin 1 of op-amp IC32. The second end of resistor R35 is connected to pin 5 of op-amp IC32. Pins 3 and 4 of op-amp IC32 are powered by power supplies V34 and V35, respectively, and pin 2 is grounded. The first end of resistor R34 is connected to the first end of capacitor C32, the second end of capacitor C31, and pin 5 of op-amp IC31. The first end of capacitor C31 is connected to the second end of resistor R32. The first end of resistor R32 is connected to the VER pin of U31. Pin 1 of op-amp IC31 is connected to the VDD pin, pin 2 is connected to the VCC pin, pins 3 and 4 are powered by power supplies V31 and V32, respectively, and the second end of capacitor V32 is connected to power supply V33.

4. The coal mine underground borehole micro-motion surface wave signal monitoring device as described in claim 1, characterized in that, The signal conditioning circuit can perform signal conditioning and calculation; the signal conditioning circuit includes: resistors R41, R42, R43, R44, R45, and R46; capacitors C41, C42, and C43; diode D41; power supplies V41, V42, V43, V44, and V45; and operational amplifier IC41; wherein: The second terminal of resistor R41 is connected to the first terminal of diode D41, the first terminal of resistor R43, capacitor C41, and the first terminal of resistor R45. The second terminal of diode D41 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is grounded. The second terminal of resistor R43 is connected to the second terminal of capacitor C41 and grounded. The first terminal of resistor R44 is grounded, and the second terminal is connected to the first terminal of resistor R46 and grounded. The second terminal of resistor R46 is connected to power supply V41. The first terminal of capacitor C42 is connected to power supply V44, and the second terminal is connected to the second terminal of capacitor C43 and power supply V45. One pin of operational amplifier IC41 is connected to the second terminals of resistors R44 and R46. The second pin is connected to the second terminal of resistor R45. The third and fourth pins are connected to power supplies V42 and V43 respectively. The fifth pin is connected to the first terminal of capacitor C43.

5. The coal mine underground borehole micro-motion surface wave signal monitoring device as described in claim 1, characterized in that, The signal transmission circuit enables efficient and stable signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, and R54; capacitors C51, C52, and C53; power supplies V51, V52, and V53; and integrated chip U51. The first terminal of resistor R51 is grounded, and the second terminal is connected to power supply V51, the first terminal of capacitor C51, and the VCC pin of U51. The second terminal of capacitor C51 is connected to the VDD pin, the AGND pin is grounded, the DATA pin is connected to the first terminal of resistor R52, the DGND pin is connected to power supply V53 and the first terminal of resistor R53, the second terminal of resistor R53 is grounded, resistor R52 is connected to the DAT pin of U52, the GND1 and GND2 pins of U52 are connected to the second terminal of capacitor C52 respectively, the first terminal of capacitor C52 is grounded, the VSS pin of U52 is connected to power supply V52 and the first terminal of capacitor V53, the GND pin is connected to the first terminal of resistor R54, and the second terminal of resistor R54 is grounded.

6. A method for monitoring and receiving micro-motion surface wave signals in underground coal mine boreholes, characterized in that, This method is based on the coal mine underground borehole micro-motion surface wave signal monitoring device according to any one of claims 1 to 5, and includes the following steps: Step 1: The signal receiving circuit acquires signals from the formation in the borehole; Step 2: The digital-to-analog converter circuit performs digital-to-analog conversion on the received signal to obtain the processed signal, and then transmits the processed signal to the signal conditioning circuit; Step 3: The signal conditioning circuit receives the signal processed by the digital-to-analog converter circuit, performs further calculations on the processed signal, and then transmits the calculated signal to the signal transmission circuit. Step 4: The signal transmission circuit receives the processed signal and transmits it to the ground host computer.

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