Coal mine underground drilling hydrological advanced network monitoring device and monitoring method

Abstract

The invention discloses a coal mine underground drilling hydrological advanced network monitoring device and method. The device comprises a signal receiving circuit, a receiving control circuit, a monitoring calculation circuit and a signal transmission circuit. The signal receiving circuit is used for receiving electric signals according to set parameters and transmitting the received electric signals to the receiving control circuit, and the receiving control circuit preliminarily processes the received signals, controls operation of the whole circuit, guarantees transmission of the signals and transmits the preliminarily processed signals to the monitoring calculation circuit. The monitoring calculation circuit further conditions the received signal and transmits the conditioned signal to the signal transmission circuit, and the signal transmission circuit modulates the signal and then transmits the signal in an electric field mode. According to the invention, the drilling hydrological parameter condition can be monitored in real time, the accuracy of monitoring data can be ensured, and the anti-interference capability and the sensitivity of the received signal are improved, so that the development and the application of an underground coal mine exploration technology are promoted.

Description

Technical Field

[0001] This invention belongs to the field of geophysical exploration technology and relates to a coal mine underground borehole hydrological advance network monitoring device and monitoring method. Background Technology

[0002] Mining areas face challenges such as deep mineral deposits, complex hydrological environments, and diverse geological structures. During coal mining, constant dynamic monitoring of the mine floor is crucial to prevent large-scale water inrush, ensuring the safety of miners and minimizing unnecessary losses. With the widespread application of intelligent coal exploration and mining technologies, the safety of miners and the geological environment during mining has become increasingly important. Currently, most mines in my country are located in remote, deep mountain areas with extremely complex geological environments, significantly increasing the difficulty of mining operations. Many mining areas in my country constantly face the threat of water hazards to the mine floor, and these hazards are becoming increasingly severe, severely limiting the long-term development of intelligent coal mining. For a long time, observation of caving zones and water-conducting fracture zones has relied primarily on drilling, a technique that cannot capture the dynamic development process of these zones.

[0003] Geophysical exploration in coal mines is challenging due to the need for sufficient surface space, severely limiting the application of established surface methods under underground conditions. Real-time dynamic monitoring of the mining-induced damage development of the coal seam roof and floor is of significant practical importance for water control in coal mines. By comprehensively analyzing the spatiotemporal distribution of electrical parameters in the test area, the deformation and failure patterns of the coal seam roof strata during mining were obtained. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a coal mine underground borehole hydrological advanced network monitoring device and monitoring method to solve the above-mentioned problems of the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A coal mine underground borehole hydrological advance network monitoring device includes a signal receiving circuit, a receiving control circuit, a monitoring calculation circuit, and a signal transmission circuit; the signal receiving circuit is connected to the receiving control circuit, the receiving control circuit is connected to the monitoring calculation circuit, and the monitoring calculation circuit is connected to the signal transmission circuit.

[0007] The signal receiving circuit is used to receive electrical signals according to the set parameters and transmit the received electrical signals to the receiving control circuit. The receiving control circuit performs preliminary processing on the received signals, controls the operation of the overall circuit, and ensures signal transmission. The receiving control circuit transmits the pre-processed signals to the monitoring and calculation circuit. The monitoring and calculation circuit receives the signals from the receiving control circuit, further conditions the received signals, and transmits the conditioned signals to the signal transmission circuit. After receiving the signals, the signal transmission circuit modulates the signals and then transmits the signals through an electric field.

[0008] The present invention also includes the following technical features:

[0009] Specifically, the signal receiving circuit can rectify, filter, and condition the received voltage signal; the signal receiving circuit includes: resistors R21, R22, and R23; capacitors C21, C22, C23, and C24; diodes D21 and D22; operational amplifier IC21; power supplies V21, V22, and V23; coils L21, L22, and L23; and a magnetic core CTT.

[0010] The first end of coil L23 is connected to the first ends of resistor R21, capacitor C21, and capacitor C22; the second end of coil L23 is connected to the second ends of resistor R21, capacitor C21, and operational amplifier IC21; the second end of capacitor C22 is connected to the first ends of resistor R22, capacitor C23, and operational amplifier IC21; the fifth end of operational amplifier IC21 is connected to the second ends of resistor R22, capacitor C23, capacitor C24, and resistor R23; the third end of operational amplifier IC21 is connected to power supply V21; the fourth end of operational amplifier IC21 is connected to power supply V22; the second end of capacitor C24 is connected to ground GND; the second end of resistor R23 is connected to the first ends of diode D21 and diode D22, serving as the output terminal of the signal receiving circuit; the second end of diode D21 is connected to ground GND; and the second end of diode D22 is connected to power supply V23.

[0011] Specifically, the receiving control circuit can perform digital-to-analog conversion on the received signal, converting the conditioned analog signal into a digital signal; the receiving control circuit includes: resistors R31, R32, R33, R34, R35, capacitors C31, C32, C33, C34, C35, C36, C37, C38, integrated circuit U31, power supply V31, power supply V32, and power supply V33;

[0012] The first terminal of capacitor C31 is connected to power supply V31; the second terminal of capacitor C31 is connected to the first terminals of capacitor C32, resistor R31, capacitor C33, and resistor R32; the second terminal of capacitor C32 is connected to the first terminal NCI of integrated circuit U31; the second terminal of resistor R31 is connected to the second terminal FRE of integrated circuit U31; the second terminal of capacitor C33 is connected to the third terminal VS of integrated circuit U31; the second terminal of resistor R32 is connected to the fourth terminal SET of integrated circuit U31; the first terminal of capacitor C34 is connected to power supply V32; the second terminal of capacitor C34 is connected to the sixth terminal VCC of integrated circuit U31; the first terminal of resistor R33 is connected to the output terminal of the signal receiving circuit. Connections: The second terminal of resistor R33 is connected to the eighth terminal IN of integrated circuit U31; the ninth terminal AGND of integrated circuit U31 is connected to the first terminal of resistor R34; the second terminal of resistor R34 is connected to the second terminal of capacitor C35 and power supply V33; the eleventh terminal VDD of integrated circuit U31 is connected to the first terminal of capacitor C36; the thirteenth terminal CIN of integrated circuit U31 is connected to the first terminal of capacitor C37; the second terminal of capacitor C37 is connected to the second terminal of resistor R35; the fifteenth terminal RIN of integrated circuit U31 is connected to the first terminal of resistor R35; the sixteenth terminal OUT of integrated circuit U31 is connected to the first terminal of capacitor C38; the second terminal of capacitor C38 is the output terminal of the receiving control circuit.

[0013] Specifically, the monitoring and calculation circuit can integrate and calculate the received signals to ensure the accuracy of the signals; the monitoring and calculation circuit includes: resistors R41, R42, R43, R44, R45, R46, and R47; capacitors C41, C42, C43, C44, C45, and C46; operational amplifier IC41; power supply V41, V42, V43, and V44; and diode D41.

[0014] The second terminal of capacitor C41 is connected to the output terminal of the receiving control circuit, the first terminal of diode D41, the second terminal of resistor R41, the first terminal of resistor R42, and the first terminal of resistor R43; the first terminal of capacitor C41 is connected to power supply V41 and the first terminal of resistor R41; the second terminal of diode D41 is connected to the second terminal of resistor R42 and ground GND; the second terminal of resistor R43 is connected to the second terminal of operational amplifier IC41; the first terminal of operational amplifier IC41 is connected to power supply V42 and the first terminal of resistor R44; the second terminal of resistor R44 is connected to the first terminal of capacitor C42; The second terminal of capacitor C42 is connected to the first terminal of capacitor C43 and the fifth terminal of operational amplifier IC41; the second terminal of capacitor C43 is connected to the first terminal of resistor R45; the fourth terminal of operational amplifier IC41 is connected to the first terminal of capacitor C45; the second terminal of capacitor C45 is connected to the second terminal of resistor R46, the first terminal of capacitor C46, ​​and the first terminal of resistor R47; the first terminal of resistor R46 is connected to the first terminal of capacitor C44; the second terminal of capacitor C44 is connected to ground GND; the second terminal of capacitor C46 is connected to the second terminal of resistor R47 and ground GND; the second terminal of resistor R45 is the output terminal.

[0015] Specifically, the signal transmission circuit enables stable long-distance signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, R54, R55, and R56; capacitors C51, C52, C53, C54, C55, C56, and C57; diodes D51 and D52; power supplies V51, V52, V53, V54, and V55; and operational amplifiers IC51 and IC52.

[0016] The first terminal of capacitor C51 is connected to the first terminal of capacitor C52 and the first terminal of operational amplifier IC51; the second terminal of capacitor C51 is connected to the first terminal of resistor R51; the second terminal of capacitor C52 is connected to the first terminal of capacitor C53; the second terminal of resistor R51 is connected to the second terminal of capacitor C53, the first terminal of diode D51, and the first terminal of diode D52; the second terminal of operational amplifier IC51 is connected to the first terminal of resistor R53; the third terminal of operational amplifier IC51 is connected to power supply V51; the fifth terminal of operational amplifier IC51 is connected to the first terminal of resistor R52 and the first terminal of capacitor C54; the second terminal of resistor R53 is connected to the first terminal of resistor R54; the second terminal of resistor R52 is connected to the second terminal of capacitor C54; the fifth terminal of resistor R54 is connected to the first terminal of resistor R52; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C52 ... Two terminals are connected to power supply V52; the second terminal of diode D51 is connected to the second terminal of diode D52 and the first terminal of resistor R55; the first terminal of resistor R55 is connected to the first terminal of operational amplifier IC52; the second terminal of operational amplifier IC52 is connected to the first terminal of resistor R56; the second terminal of resistor R56 is connected to power supply V55; the third terminal of operational amplifier IC52 is connected to power supply V53; the fourth terminal of operational amplifier IC52 is connected to power supply V54; the fifth terminal of operational amplifier IC52 is connected to the first terminals of capacitor C55 and capacitor C56; the second terminal of capacitor C56 is connected to the first terminal of capacitor C57; the second terminal of capacitor C57 is connected to ground GND; the second terminal of capacitor C55 is the output terminal of the signal transmission circuit.

[0017] A method for advanced hydrological monitoring of underground coal mine boreholes, the method being implemented based on the aforementioned advanced hydrological monitoring device for underground coal mine boreholes, includes the following steps:

[0018] Step 1: The signal receiving circuit acquires signals from the formation in the borehole;

[0019] Step 2: The receiving control circuit processes the received signal to obtain the processed signal, and then transmits the processed signal to the monitoring and calculation circuit.

[0020] Step 3: The monitoring and calculation circuit receives the processed signal, performs further calculations on the processed signal, and then transmits the calculated signal to the signal transmission circuit.

[0021] Step 4: The signal transmission circuit receives the processed signal from the monitoring and computing circuit and transmits the processed signal to the ground host computer.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] (1) The coal mine underground borehole hydrological advance network monitoring device of the present invention is used in the borehole. The circuit design adopts a simple design concept to reduce the space occupied by the circuit while achieving the goal of signal reception and processing.

[0024] (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.

[0025] (3) The monitoring device of the present invention can monitor the borehole hydrological parameters in real time, which can ensure the accuracy of the monitoring data and ensure that it is portable in the mine. It improves the anti-interference ability of the received signal and improves the sensitivity of the received signal, thereby promoting the development and application of coal mine underground exploration technology. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the underground borehole hydrological advanced network monitoring device for coal mines according to the present invention.

[0027] Figure 2 This is a schematic diagram of the signal receiving circuit of the present invention.

[0028] Figure 3 This is a schematic diagram of the receiving control circuit of the present invention.

[0029] Figure 4 This is a schematic diagram of the monitoring and calculation circuit of the present invention.

[0030] Figure 5 This is a schematic diagram of the signal transmission circuit of the present invention.

[0031] Figure 6 This is a flowchart of the method for advanced hydrological network monitoring of underground boreholes in coal mines according to the present invention.

[0032] Figure 7 This is a comparison curve of the monitoring results of this invention. Detailed Implementation

[0033] 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.

[0034] Example:

[0035] This embodiment provides a pre-monitoring network device for underground borehole hydrology in coal mines, such as... Figure 1 As shown, it includes a signal receiving circuit, a receiving control circuit, a monitoring and calculation circuit, and a signal transmission circuit; the signal receiving circuit is connected to the receiving control circuit, the receiving control circuit is connected to the monitoring and calculation circuit, and the monitoring and calculation circuit is connected to the signal transmission circuit.

[0036] The signal receiving circuit is used to receive electrical signals according to the set parameters and transmit the received electrical signals to the receiving control circuit. The receiving control circuit performs preliminary processing on the received signals, controls the operation of the overall circuit, and ensures signal transmission. The receiving control circuit transmits the pre-processed signals to the monitoring and calculation circuit. The monitoring and calculation circuit receives the signals from the receiving control circuit, further conditions the received signals, and transmits the conditioned signals to the signal transmission circuit. After receiving the signals, the signal transmission circuit modulates the signals and then transmits the signals through an electric field.

[0037] The underground borehole hydrological advance network monitoring device in coal mines rapidly and in real time receives hydrological advance network monitoring signals from the boreholes, improving signal reception efficiency, data reception and processing capabilities, and saving a significant amount of time.

[0038] Signal receiving circuit, such as Figure 2 As shown, the signal receiving circuit can rectify, filter, and condition the received voltage signal. The circuit includes: resistors R21, R22, and R23; capacitors C21, C22, C23, and C24; diodes D21 and D22; operational amplifier IC21; power supplies V21, V22, and V23; coils L21, L22, and L23; and a magnetic core CTT. The operational amplifier IC21 is an LM741.

[0039] The first terminal of coil L23 is connected to the first terminals of resistor R21, capacitor C21, and capacitor C22; the second terminal of coil L23 is connected to the second terminals of resistor R21, capacitor C21, and operational amplifier IC21; the second terminal of capacitor C22 is connected to the first terminals of resistor R22, capacitor C23, and operational amplifier IC21; the fifth terminal of operational amplifier IC21 is connected to the second terminals of resistor R22, capacitor C23, capacitor C24, and resistor R23; the third terminal of operational amplifier IC21 is connected to power supply V21; the fourth terminal of operational amplifier IC21 is connected to power supply V22; the second terminal of capacitor C24 is connected to ground GND; the second terminal of resistor R23 is connected to the first terminals of diode D21 and diode D22, serving as the output terminal of the signal receiving circuit; the second terminal of diode D21 is connected to ground GND; and the second terminal of diode D22 is connected to power supply V23.

[0040] The signal receiving circuit, using an external signal conditioning device placed closer, can improve the measured signal-to-noise ratio by increasing the signal level before the signal is affected by ambient noise.

[0041] Receiver control circuit, such as Figure 3As shown, the receiver control circuit can perform digital-to-analog conversion on the received signal, converting the conditioned analog signal into a digital signal. The circuit includes: resistors R31, R32, R33, R34, and R35; capacitors C31, C32, C33, C34, C35, C36, C37, and C38; integrated circuit U31; and power supplies V31, V32, and V33. Integrated circuit U31 is model SN74LS03.

[0042] The first terminal of capacitor C31 is connected to power supply V31; the second terminal of capacitor C31 is connected to the first terminals of capacitor C32, resistor R31, capacitor C33, and resistor R32; the second terminal of capacitor C32 is connected to the first terminal NCI of integrated circuit U31; the second terminal of resistor R31 is connected to the second terminal FRE of integrated circuit U31; the second terminal of capacitor C33 is connected to the third terminal VS of integrated circuit U31; the second terminal of resistor R32 is connected to the fourth terminal SET of integrated circuit U31; the first terminal of capacitor C34 is connected to power supply V32; the second terminal of capacitor C34 is connected to the sixth terminal VCC of integrated circuit U31; the first terminal of resistor R33 is connected to the output terminal of the signal receiving circuit. Connections: The second terminal of resistor R33 is connected to the eighth terminal IN of integrated circuit U31; the ninth terminal AGND of integrated circuit U31 is connected to the first terminal of resistor R34; the second terminal of resistor R34 is connected to the second terminal of capacitor C35 and power supply V33; the eleventh terminal VDD of integrated circuit U31 is connected to the first terminal of capacitor C36; the thirteenth terminal CIN of integrated circuit U31 is connected to the first terminal of capacitor C37; the second terminal of capacitor C37 is connected to the second terminal of resistor R35; the fifteenth terminal RIN of integrated circuit U31 is connected to the first terminal of resistor R35; the sixteenth terminal OUT of integrated circuit U31 is connected to the first terminal of capacitor C38; the second terminal of capacitor C38 is the output terminal of the receiving control circuit.

[0043] The receiving control circuit operates stably, has strong anti-interference capabilities, and high conversion accuracy. It converts analog signals into digital signals, which are then sent to the receiving control circuit. The receiving control circuit then adopts a control strategy based on the corresponding quantization value.

[0044] Monitoring computing circuits, such as Figure 4 As shown, the received signals can be integrated and calculated to ensure signal accuracy. The monitoring and calculation circuit includes: resistors R41, R42, R43, R44, R45, R46, and R47; capacitors C41, C42, C43, C44, C45, and C46; operational amplifier IC41; power supplies V41, V42, V43, and V44; and diode D41. The operational amplifier IC41 is an LM258.

[0045] The second terminal of capacitor C41 is connected to the output terminal of the receiving control circuit, the first terminal of diode D41, the second terminal of resistor R41, the first terminal of resistor R42, and the first terminal of resistor R43; the first terminal of capacitor C41 is connected to power supply V41 and the first terminal of resistor R41; the second terminal of diode D41 is connected to the second terminal of resistor R42 and ground GND; the second terminal of resistor R43 is connected to the second terminal of operational amplifier IC41; the first terminal of operational amplifier IC41 is connected to power supply V42 and the first terminal of resistor R44; the second terminal of resistor R44 is connected to the first terminal of capacitor C42; The second terminal of capacitor C42 is connected to the first terminal of capacitor C43 and the fifth terminal of operational amplifier IC41; the second terminal of capacitor C43 is connected to the first terminal of resistor R45; the fourth terminal of operational amplifier IC41 is connected to the first terminal of capacitor C45; the second terminal of capacitor C45 is connected to the second terminal of resistor R46, the first terminal of capacitor C46, ​​and the first terminal of resistor R47; the first terminal of resistor R46 is connected to the first terminal of capacitor C44; the second terminal of capacitor C44 is connected to ground GND; the second terminal of capacitor C46 is connected to the second terminal of resistor R47 and ground GND; the second terminal of resistor R45 is the output terminal.

[0046] The monitoring and computing circuit can control a large load power with a small control power. It can realize complex control functions through electronic components. Its advantages are low energy consumption, high reliability, high speed, small size and low failure rate.

[0047] Signal transmission circuits, such as Figure 5 As shown, it can perform stable long-distance signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, R54, R55, and R56; capacitors C51, C52, C53, C54, C55, C56, and C57; diodes D51 and D52; power supplies V51, V52, V53, V54, and V55; operational amplifier IC51 and IC52. Operational amplifier IC51 is model LM741, and operational amplifier IC52 is model LM358.

[0048] The first terminal of capacitor C51 is connected to the first terminal of capacitor C52 and the first terminal of operational amplifier IC51; the second terminal of capacitor C51 is connected to the first terminal of resistor R51; the second terminal of capacitor C52 is connected to the first terminal of capacitor C53; the second terminal of resistor R51 is connected to the second terminal of capacitor C53, the first terminal of diode D51, and the first terminal of diode D52; the second terminal of operational amplifier IC51 is connected to the first terminal of resistor R53; the third terminal of operational amplifier IC51 is connected to power supply V51; the fifth terminal of operational amplifier IC51 is connected to the first terminal of resistor R52 and the first terminal of capacitor C54; the second terminal of resistor R53 is connected to the first terminal of resistor R54; the second terminal of resistor R52 is connected to the second terminal of capacitor C54; the fifth terminal of resistor R54 is connected to the first terminal of resistor R52; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C52 ... Two terminals are connected to power supply V52; the second terminal of diode D51 is connected to the second terminal of diode D52 and the first terminal of resistor R55; the first terminal of resistor R55 is connected to the first terminal of operational amplifier IC52; the second terminal of operational amplifier IC52 is connected to the first terminal of resistor R56; the second terminal of resistor R56 is connected to power supply V55; the third terminal of operational amplifier IC52 is connected to power supply V53; the fourth terminal of operational amplifier IC52 is connected to power supply V54; the fifth terminal of operational amplifier IC52 is connected to the first terminals of capacitor C55 and capacitor C56; the second terminal of capacitor C56 is connected to the first terminal of capacitor C57; the second terminal of capacitor C57 is connected to ground GND; the second terminal of capacitor C55 is the output terminal of the signal transmission circuit.

[0049] The signal transmission circuit uses a simple combination of electronic components and provides short-circuit and overcurrent protection in a convenient package, improving the stability and efficiency of signal transmission.

[0050] This invention also provides a method for advanced hydrological network monitoring of underground coal mine boreholes. This method, through real-time and precise monitoring of multiple parameters such as borehole water location, range, and water content, forms a comprehensive and dynamic hydrological data network. This provides reliable decision-making support for safe coal mine production, effectively prevents and responds to various hydrological disasters, and ensures the safe and efficient operation of underground coal mines. Figure 6 The diagram shows a flowchart of the signal receiving method, with the specific steps as follows:

[0051] Step 1: The signal receiving circuit acquires signals generated by natural field sources from the formation in the borehole;

[0052] Step 2: The receiving control circuit amplifies and filters the received signal to obtain the processed signal, and then transmits the processed signal to the monitoring and calculation circuit.

[0053] Step 3: The monitoring and calculation circuit receives the signal processed by the receiving control circuit, performs further calculations on the processed signal, and obtains the preliminary borehole water location, range, and water content signals. Then, the calculated signal is transmitted to the signal transmission circuit.

[0054] Step 4: The signal transmission circuit receives the water location, range, and water content signals processed by the monitoring and calculation circuit, and transmits the processed signals to the ground host computer.

[0055] like Figure 7 The figure shown is a comparison curve of the monitoring results provided by the present invention. Figure 7 As can be seen, the curves only contain simple signal parameters with low resolution, affecting the effectiveness of subsequent monitoring data. In contrast, the images obtained after using the monitoring device and method provided by this invention show abundant signal curves. These curves demonstrate that the values ​​of the geological parameters change systematically over different times, with higher resolution. Information about the geological formation can be inferred from these numerical changes. Verification through tunnel excavation fully 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 pre-monitoring network device for underground borehole hydrology in coal mines, characterized in that, It includes a signal receiving circuit, a receiving control circuit, a monitoring and computing circuit, and a signal transmission circuit; the signal receiving circuit is connected to the receiving control circuit, the receiving control circuit is connected to the monitoring and computing circuit, and the monitoring and computing circuit is connected to the signal transmission circuit. The signal receiving circuit is used to receive electrical signals according to the set parameters and transmit the received electrical signals to the receiving control circuit. The receiving control circuit performs preliminary processing on the received signals, controls the operation of the overall circuit, and ensures signal transmission. The receiving control circuit transmits the pre-processed signals to the monitoring and calculation circuit. The monitoring and calculation circuit receives the signals from the receiving control circuit, further conditions the received signals, and transmits the conditioned signals to the signal transmission circuit. After receiving the signals, the signal transmission circuit modulates the signals and then transmits the signals through an electric field.

2. The coal mine underground borehole hydrological advance network monitoring device as described in claim 1, characterized in that, The signal receiving circuit can rectify, filter, and condition the received voltage signal; the signal receiving circuit includes: resistors R21, R22, and R23; capacitors C21, C22, C23, and C24; diodes D21 and D22; operational amplifier IC21; power supplies V21, V22, and V23; coils L21, L22, and L23; and a magnetic core CTT. The first end of coil L23 is connected to the first ends of resistor R21, capacitor C21, and capacitor C22; the second end of coil L23 is connected to the second ends of resistor R21, capacitor C21, and operational amplifier IC21; the second end of capacitor C22 is connected to the first ends of resistor R22, capacitor C23, and operational amplifier IC21; the fifth end of operational amplifier IC21 is connected to the second ends of resistor R22, capacitor C23, capacitor C24, and resistor R23; the third end of operational amplifier IC21 is connected to power supply V21; the fourth end of operational amplifier IC21 is connected to power supply V22; the second end of capacitor C24 is connected to ground GND; the second end of resistor R23 is connected to the first ends of diode D21 and diode D22, serving as the output terminal of the signal receiving circuit; the second end of diode D21 is connected to ground GND; and the second end of diode D22 is connected to power supply V23.

3. The coal mine underground borehole hydrological advance network monitoring device as described in claim 1, characterized in that, The receiving control circuit can perform digital-to-analog conversion on the received signal, converting the conditioned analog signal into a digital signal; the receiving control circuit includes: resistors R31, R32, R33, R34, R35, capacitors C31, C32, C33, C34, C35, C36, C37, C38, integrated circuit U31, power supply V31, power supply V32, and power supply V33; The first terminal of capacitor C31 is connected to power supply V31; the second terminal of capacitor C31 is connected to the first terminals of capacitor C32, resistor R31, capacitor C33, and resistor R32; the second terminal of capacitor C32 is connected to the first terminal NCI of integrated circuit U31; the second terminal of resistor R31 is connected to the second terminal FRE of integrated circuit U31; the second terminal of capacitor C33 is connected to the third terminal VS of integrated circuit U31; the second terminal of resistor R32 is connected to the fourth terminal SET of integrated circuit U31; the first terminal of capacitor C34 is connected to power supply V32; the second terminal of capacitor C34 is connected to the sixth terminal VCC of integrated circuit U31; the first terminal of resistor R33 is connected to the output terminal of the signal receiving circuit. Connections: The second terminal of resistor R33 is connected to the eighth terminal IN of integrated circuit U31; the ninth terminal AGND of integrated circuit U31 is connected to the first terminal of resistor R34; the second terminal of resistor R34 is connected to the second terminal of capacitor C35 and power supply V33; the eleventh terminal VDD of integrated circuit U31 is connected to the first terminal of capacitor C36; the thirteenth terminal CIN of integrated circuit U31 is connected to the first terminal of capacitor C37; the second terminal of capacitor C37 is connected to the second terminal of resistor R35; the fifteenth terminal RIN of integrated circuit U31 is connected to the first terminal of resistor R35; the sixteenth terminal OUT of integrated circuit U31 is connected to the first terminal of capacitor C38; the second terminal of capacitor C38 is the output terminal of the receiving control circuit.

4. The coal mine underground borehole hydrological advance network monitoring device as described in claim 1, characterized in that, The monitoring and calculation circuit can integrate and calculate the received signals to ensure the accuracy of the signals. The monitoring and calculation circuit includes: resistors R41, R42, R43, R44, R45, R46, and R47; capacitors C41, C42, C43, C44, C45, and C46; operational amplifier IC41; power supply V41, V42, V43, and V44; and diode D41. The second terminal of capacitor C41 is connected to the output terminal of the receiving control circuit, the first terminal of diode D41, the second terminal of resistor R41, the first terminal of resistor R42, and the first terminal of resistor R43; the first terminal of capacitor C41 is connected to power supply V41 and the first terminal of resistor R41; the second terminal of diode D41 is connected to the second terminal of resistor R42 and ground GND; the second terminal of resistor R43 is connected to the second terminal of operational amplifier IC41; the first terminal of operational amplifier IC41 is connected to power supply V42 and the first terminal of resistor R44; the second terminal of resistor R44 is connected to the first terminal of capacitor C42; The second terminal of capacitor C42 is connected to the first terminal of capacitor C43 and the fifth terminal of operational amplifier IC41; the second terminal of capacitor C43 is connected to the first terminal of resistor R45; the fourth terminal of operational amplifier IC41 is connected to the first terminal of capacitor C45; the second terminal of capacitor C45 is connected to the second terminal of resistor R46, the first terminal of capacitor C46, ​​and the first terminal of resistor R47; the first terminal of resistor R46 is connected to the first terminal of capacitor C44; the second terminal of capacitor C44 is connected to ground GND; the second terminal of capacitor C46 is connected to the second terminal of resistor R47 and ground GND; the second terminal of resistor R45 is the output terminal.

5. The coal mine underground borehole hydrological advance network monitoring device as described in claim 1, characterized in that, The signal transmission circuit is capable of stable long-distance signal transmission; the signal transmission circuit includes: resistors R51, R52, R53, R54, R55, and R56; capacitors C51, C52, C53, C54, C55, C56, and C57; diodes D51 and D52; power supplies V51, V52, V53, V54, and V55; and operational amplifiers IC51 and IC52. The first terminal of capacitor C51 is connected to the first terminal of capacitor C52 and the first terminal of operational amplifier IC51; the second terminal of capacitor C51 is connected to the first terminal of resistor R51; the second terminal of capacitor C52 is connected to the first terminal of capacitor C53; the second terminal of resistor R51 is connected to the second terminal of capacitor C53, the first terminal of diode D51, and the first terminal of diode D52; the second terminal of operational amplifier IC51 is connected to the first terminal of resistor R53; the third terminal of operational amplifier IC51 is connected to power supply V51; the fifth terminal of operational amplifier IC51 is connected to the first terminal of resistor R52 and the first terminal of capacitor C54; the second terminal of resistor R53 is connected to the first terminal of resistor R54; the second terminal of resistor R52 is connected to the second terminal of capacitor C54; the fifth terminal of resistor R54 is connected to the first terminal of resistor R52; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C54; the second terminal of resistor R54 is connected to the first terminal of capacitor C52 ... Two terminals are connected to power supply V52; the second terminal of diode D51 is connected to the second terminal of diode D52 and the first terminal of resistor R55; the first terminal of resistor R55 is connected to the first terminal of operational amplifier IC52; the second terminal of operational amplifier IC52 is connected to the first terminal of resistor R56; the second terminal of resistor R56 is connected to power supply V55; the third terminal of operational amplifier IC52 is connected to power supply V53; the fourth terminal of operational amplifier IC52 is connected to power supply V54; the fifth terminal of operational amplifier IC52 is connected to the first terminals of capacitor C55 and capacitor C56; the second terminal of capacitor C56 is connected to the first terminal of capacitor C57; the second terminal of capacitor C57 is connected to ground GND; the second terminal of capacitor C55 is the output terminal of the signal transmission circuit.

6. A method for advanced hydrological network monitoring of underground boreholes in coal mines, characterized in that, This method is implemented based on the coal mine underground borehole hydrological advance network 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 receiving control circuit processes the received signal to obtain the processed signal, and then transmits the processed signal to the monitoring and calculation circuit. Step 3: The monitoring and calculation circuit receives the processed signal, 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 from the monitoring and computing circuit and transmits the processed signal to the ground host computer.

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