Underground coal mine monitoring device

Abstract

The invention relates to the technical field of mine monitoring, and discloses a coal mine underground monitoring device which comprises monitoring terminals, a sampling pipeline and a driving unit, the driving unit is installed on the ground, a plurality of monitoring terminals are installed in a mine laneway, and the driving unit is communicated with the monitoring terminals through the sampling pipeline; a plurality of one-way valves are mounted on the surface of the sampling pipeline, and a plurality of communication balls are mounted in the sampling pipeline. According to the monitoring device provided by the invention, the sampling pipeline provided with the one-way valve and the communication balls is arranged, the negative pressure of the sampling pipeline is utilized to suck multiple air samples in the mine into the sampling pipeline from the one-way valve, and the air samples are respectively stored in the area between the adjacent communication balls and are conveyed into the monitoring terminal along the sampling pipeline for detection; according to the utility model, an active sampling detection function is realized, the design enables the sampling coverage in a mine to be wider, the problem that numerous detection blind areas exist in an area between two terminals is solved, and the authenticity and reliability of monitoring are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine monitoring, and in particular to an underground coal mine monitoring device. Background Art

[0002] A monitoring system is built in the mine to complete the detection of parameters such as gas concentration, temperature, carbon dioxide concentration, temperature, etc., and has an alarm function for dangerous situations. It meets the user's requirements for real-time monitoring of underground production conditions and timely detection and elimination of dangerous situations. It can effectively prevent the occurrence of most mining accidents. It is an important means to ensure the safe production of coal mines and prevent gas accidents. The coal mine safety environment monitoring system plays an important role in the safe production of coal mines.

[0003] In the prior art, the patent document with the announcement number CN114567379B discloses a monitoring system for use in mines. The system includes a monitoring platform, an optical sensing communication base station, an optical cable, and an integrated communication and acquisition terminal; the integrated communication and acquisition terminal is used to collect scene information in the mine, and uses the scene information to modulate the pulsed light signal in the optical cable and send it to the optical sensing communication base station, wherein the scene information includes environmental information and personnel information; the optical sensing communication base station is used to parse the scene information from the received pulsed light signal, and convert it into corresponding scene indicators, and send the scene indicators to the monitoring platform, wherein the scene indicators include environmental indicators and personnel positioning indicators; the monitoring platform is used to count the received scene indicators and, based on the statistical results, push the corresponding scene monitoring interface of the mine. This invention reduces the difficulty of mine monitoring, and mine monitoring can be achieved by using the original optical cables in the mine.

[0004] Due to the long length of the mine, many such integrated communication and data collection terminals need to be installed in the mine. The detection range of each integrated communication and data collection terminal is limited. For example, when detecting gas concentration, there is a large collection blind spot in the area between two adjacent integrated communication and data collection terminals. If the detection coverage is expanded by increasing the number of terminals, it will be very difficult to implement. Based on this, the existing monitoring device needs to be installed in a large number of terminals when used in mines with longer distances, and the investment and maintenance costs are high. Otherwise, there is a detection blind spot in the area between the two terminals, which cannot meet the demand for 24-hour comprehensive real-time monitoring in the mine. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that when a monitoring device is used in a mine over a long distance, a large number of terminals need to be installed, and the investment and maintenance costs are high. Otherwise, there is a detection blind spot in the area between the two terminals. A coal mine underground monitoring device is proposed.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a coal mine underground monitoring device, comprising a monitoring terminal, a sampling pipe, and a drive unit, wherein the drive unit is installed on the ground, and a plurality of monitoring terminals are installed in the mine tunnel, and the drive unit is connected to each monitoring terminal through the sampling pipe;

[0007] Several one-way valves are installed on the surface of the sampling pipe located in the mine tunnel. The air in the mine tunnel enters the sampling pipe through the one-way valves. Several communication balls are installed in the sampling pipe.

[0008] The monitoring terminal is equipped with a storage unit, a detection module, a photoelectric sensor, an electric pin, an exhaust pipe and an intake pipe with an electric valve;

[0009] The driving unit pumps air or sucks air into the sampling pipe, driving the communication ball to circulate in the sampling pipe;

[0010] When the sampling pipeline is under negative pressure, the air in the mine tunnel enters the sampling pipeline through the one-way valve, realizing the function of active sampling detection. This design makes the sampling coverage in the mine wider, solves the problem of many detection blind spots in the area between the two terminals, and improves the authenticity and reliability of monitoring; when the sampling pipeline is under positive pressure, the air in the sampling pipeline is input into the monitoring terminal, and the detection module detects the air sample and monitors the entire area of ​​the mine.

[0011] Preferably, an air inlet and an air outlet are fixedly installed in the monitoring terminal, both of which are connected to the sampling pipe, and both of which are rotatably installed with turbine blades, which are driven by belts, and the air inlet is connected to the outside of the monitoring terminal through the intake pipe, and the air outlet is connected to the outside of the monitoring terminal through the exhaust pipe.

[0012] The electric pin is positioned between the air inlet and outlet ducts. The pin's telescopic end remains extended into the sampling pipe, and the photoelectric sensor's detection end faces the sampling pipe. When the photoelectric sensor detects the proximity of the communication ball, the pin is triggered to telescope once. This enables full-area monitoring of the mine. If an abnormality, such as excessive gas levels, is detected in a specific area of ​​the mine during the full-area monitoring process, active sampling and testing can be performed to determine the impact range of the gas anomaly within the mine, providing reference data for early warning, rescue, and mine ventilation.

[0013] Preferably, the detection module is fixedly installed on the surface of the air outlet duct, and the detection module includes a methane sensor, a temperature sensor, a humidity sensor, and a carbon dioxide sensor for detecting the air medium in the air outlet duct, so as to detect parameters such as gas concentration, temperature, carbon dioxide concentration, and temperature.

[0014] Preferably, a first electric valve is provided on the exhaust pipe and a second electric valve is provided on the intake pipe. When only the first electric valve is opened, the air between the two communication balls is squeezed into the air outlet duct and then discharged from the exhaust pipe, thereby discharging the air between the two communication balls and shortening the distance between the two communication balls.

[0015] Preferably, the communication ball is provided with a wireless communication module with its own power supply, and several communication balls transmit data through the wireless communication module to form a communication chain. The monitoring terminal is provided with a wireless receiving and transmitting module, and the detection data of the detection module is transmitted to the ground monitoring center through the wireless receiving and transmitting module and the communication chain. The design of the communication chain facilitates long-distance wireless communication in the mine.

[0016] Preferably, the driving unit includes a body, an air suction pump and an air injection pump. A storage chamber and a launching chamber are provided inside the body. The two ends of the sampling pipeline are respectively connected to the storage chamber and the launching chamber. The air inlet end of the air suction pump is connected to the storage chamber, and the air outlet end of the air injection pump is connected to the launching chamber.

[0017] A distribution disk is rotatably installed inside the storage chamber, and a servo motor is fixedly installed on the upper side of the body. The servo motor drives the distribution disk to rotate. A storage hole is provided on the surface of the distribution disk. The storage chamber and the launch chamber are connected through a feed window. The distribution disk cover is closed on the upper end of the feed window. A third electric valve is provided between the outlet end of the air injection pump and the launch chamber to realize the function of pumping air or sucking air, and drive the communication ball to circulate in the sampling pipeline.

[0018] Preferably, the air inlet end of the gas injection pump is connected to a test gas cylinder, and the test gas is delivered to the sampling pipeline through the test gas cylinder, so as to perform operation tests on each monitoring terminal, detect fault points in time, and carry out repairs and replacements.

[0019] The present invention has the following beneficial effects:

[0020] 1. The monitoring device proposed in the present invention is equipped with a sampling pipeline with a one-way valve and a communication ball. The dispersed monitoring terminals are connected through the sampling pipeline. The negative pressure of the sampling pipeline is used to draw air samples from multiple locations in the mine into the sampling pipeline through the one-way valve, and the samples are stored in the area between adjacent communication balls. The samples are then transported along the sampling pipeline to the monitoring terminal for detection, thereby realizing the function of active sampling detection. This design enables a wider sampling coverage in the mine, solves the problem of numerous detection blind spots in the area between the two terminals, and improves the authenticity and reliability of monitoring.

[0021] 2. The monitoring device proposed in the present invention comprises an electric pin, an exhaust pipe, and an intake pipe provided within a monitoring terminal. The electric pin is used to constrain the position of a communication ball, and the positive pressure of a sampling pipe is used to expel the air between adjacent communication balls. This allows the air sample in the well to be stored in the area between adjacent communication balls during active sampling. This design of segmented storage of air samples facilitates determining whether there is an air anomaly between two monitoring terminals, and uses the installation position of each monitoring terminal as a coordinate to achieve the function of inferring the location of an accident.

[0022] 3. The monitoring device proposed by the present invention, by arranging an air inlet and outlet ducts in the monitoring terminal, and two turbine blades driven by a belt, injects pressurized air into the sampling pipe, drives the communication ball to circulate in the sampling pipe, and the air in the sampling pipe can be discharged through the air outlet duct. At the same time, the outside air sample is sucked into the sampling pipe. The air sample is transported along the sampling pipe to the next station detection terminal for detection, thereby realizing the function of full-area monitoring in the mine;

[0023] During the full-area monitoring process, if abnormal conditions such as gas exceeding the limit are found in a certain area underground, active sampling and detection will be used to determine the impact range of the gas anomaly in the well, providing reference data for early warning, rescue and ventilation in the well.

[0024] 4. The monitoring device proposed by the present invention forms a communication chain by arranging communication balls in the sampling pipe. Each communication ball transmits data through a wireless communication module. Since there are many obstacles in the mine and the wireless communication distance is limited, the design of this communication chain facilitates wireless communication in the mine.

[0025] The test medium is delivered to each monitoring terminal through a sampling pipeline. For example, methane gas is used as the test medium to test whether the methane sensor in each monitoring terminal is faulty. The fault point can be discovered in time for repair and replacement, avoiding larger mine accidents caused by misjudgment of detection. This design does not require maintenance personnel to check one by one, greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a partial cross-sectional schematic diagram of the three-dimensional structure of the monitoring device proposed by the present invention;

[0027] Figure 2 A partial cross-sectional front view of the monitoring device proposed in the present invention Figure 1 ;

[0028] Figure 3 A partial cross-sectional front view of the monitoring device proposed in the present invention Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the monitoring terminal proposed by the present invention. Figure 1 ;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the monitoring terminal proposed by the present invention. Figure 2 ;

[0031] Figure 6 This is a schematic diagram of the front cross-section structure of the driving unit proposed in the present invention;

[0032] Figure 7 This is a system diagram of the monitoring device proposed in the present invention.

[0033] In the figure: 1 monitoring terminal, 2 sampling pipeline, 3 one-way valve, 4 communication ball, 5 storage unit, 6 detection module, 7 photoelectric sensor, 8 electric pin, 9 exhaust pipe, 10 suction pipe, 11 air inlet, 12 air outlet, 13 turbine blade, 14 first electric valve, 15 second electric valve, 16 wireless receiving and transmitting module, 17 machine body, 18 suction pump, 19 air injection pump, 20 storage chamber, 21 transmitting chamber, 22 distribution plate, 23 servo motor, 24 storage hole, 25 feeding window, 26 belt, 27 third electric valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] Reference Figure 1-Figure 7 A coal mine underground monitoring device includes a monitoring terminal 1, a sampling pipe 2 and a driving unit. The driving unit is installed on the ground, and several monitoring terminals 1 are installed in the mine tunnel. The driving unit is connected to each monitoring terminal 1 through the sampling pipe 2.

[0037] Several one-way valves 3 are installed on the surface of the sampling pipe 2 located in the mine tunnel. The air in the mine tunnel enters the sampling pipe 2 through the one-way valves 3. Several communication balls 4 are installed in the sampling pipe 2.

[0038] The monitoring terminal 1 is equipped with a storage unit 5, a detection module 6, a photoelectric sensor 7, an electric pin 8, an exhaust pipe 9 with an electric valve, and an intake pipe 10. When a gas explosion is dangerous in the mine, after the main power supply of the mine is cut off, the storage unit 5 supplies power to the detection module 6, the photoelectric sensor 7, the electric pin 8 and the electric valve.

[0039] The driving unit pumps air or sucks air into the sampling pipe 2, driving the communication ball 4 to circulate in the sampling pipe 2;

[0040] When the sampling pipe 2 is under negative pressure, the air in the mine tunnel enters the sampling pipe 2 through the one-way valve 3, realizing the function of active sampling detection;

[0041] When the sampling pipe 2 is under positive pressure, the air in the sampling pipe 2 is input into the monitoring terminal 1 , and the detection module 6 detects the air sample and performs full-area monitoring in the mine.

[0042] Specifically, such as Figure 4 or Figure 5 As shown, an air inlet 11 and an air outlet 12 are fixedly installed in the monitoring terminal 1. The air inlet 11 and the air outlet 12 are both connected to the sampling pipe 2. The air inlet 11 and the air outlet 12 are both rotatably installed with turbine blades 13. The two turbine blades 13 are driven by a belt 26. The air inlet 11 is connected to the outside of the monitoring terminal 1 through the intake pipe 10, and the air outlet 12 is connected to the outside of the monitoring terminal 1 through the exhaust pipe 9.

[0043] The electric pin 8 is arranged in the area between the air inlet 11 and the air outlet 12. The telescopic end of the electric pin 8 remains extended into the sampling pipe 2 to block the movement of the communication ball 4. The detection end of the photoelectric sensor 7 faces the sampling pipe 2. When the photoelectric sensor 7 detects that the communication ball 4 is approaching, the electric pin 8 is linked to extend and retract once. When the telescopic end of the electric pin 8 is retracted, the communication ball 4 can move along the sampling pipe 2.

[0044] The detection module 6 is fixedly mounted on the surface of the air outlet 12 . The detection module 6 includes a methane sensor, a temperature sensor, a humidity sensor, and a carbon dioxide sensor for detecting the air medium in the air outlet 12 .

[0045] A first electric valve 14 is provided on the exhaust pipe 9, and a second electric valve 15 is provided on the intake pipe 10. When only the first electric valve 14 is opened, the air between the two communication balls 4 is squeezed into the air outlet 12 and then discharged from the exhaust pipe 9. The detection module 6 detects parameters such as gas concentration, temperature, carbon dioxide concentration, and temperature of the air in the air outlet 12.

[0046] In this embodiment, a wireless communication module with its own power supply is provided in the communication ball 4. The surface layer of the communication ball 4 is made of rubber. Grease is coated between the communication ball 4 and the sampling pipe 2 to ensure that the communication ball 4 can move in the sampling pipe 2. Several communication balls 4 transmit data through the wireless communication module to form a communication chain. A wireless receiving and transmitting module 16 is provided in the monitoring terminal 1. The detection data of the detection module 6 is transmitted to the ground monitoring center through the wireless receiving and transmitting module 16 and the communication chain. By arranging the communication ball 4 in the sampling pipe 2, each communication ball 4 transmits data through the wireless communication module to form a communication chain. Due to the many obstacles in the mine, the wireless communication distance is limited. For details, see the reference: Yang Weihua. Research on power limitation of wireless equipment when used in mines [J]. Radio Engineering, 2008, (01): 47-48+61. The design of the communication chain facilitates long-distance wireless communication in mines.

[0047] In this embodiment, reference Figure 6 The driving unit includes a body 17, an air suction pump 18 and an air injection pump 19. A storage chamber 20 and a launching chamber 21 are provided inside the body 17. The two ends of the sampling pipe 2 are respectively connected to the storage chamber 20 and the launching chamber 21. The air inlet end of the air suction pump 18 is connected to the storage chamber 20, and the air outlet end of the air injection pump 19 is connected to the launching chamber 21.

[0048] A distribution plate 22 is rotatably installed inside the storage chamber 20, and a servo motor 23 is fixedly installed on the upper side of the body 17. The servo motor 23 drives the distribution plate 22 to rotate. A storage hole 24 is provided on the surface of the distribution plate 22. The storage chamber 20 and the launching chamber 21 are connected through a feed window 25. The distribution plate 22 covers the upper end of the feed window 25. A third electric valve 27 is arranged between the air outlet end of the air injection pump 19 and the launching chamber 21. The opening and closing of the third electric valve 27 controls the air injection rhythm of the air injection pump 19.

[0049] During use, air is injected into the launch chamber 21 through the air injection pump 19 to push the communication ball 4 to move along the sampling pipe 2, or the air in the storage chamber 20 is sucked by the air suction pump 18 to form a negative pressure in the sampling pipe 2, and the communication ball 4 moves along the sampling pipe 2, and the communication ball 4 falls into the storage hole 24. When the distribution plate 22 rotates a certain angle, the storage hole 24 is aligned with the feed window 25, and the communication ball 4 falls into the launch chamber 21, realizing the circulating movement of the communication ball 4 in the sampling pipe 2.

[0050] like Figure 4As shown, the first electric valve 14 and the second electric valve 15 are opened, and air is injected into the sampling pipe 2 through the air injection pump 19. The air between the two communication balls 4 is squeezed and discharged from the air outlet 12 and the exhaust pipe 9, driving the turbine blades 13 in the air outlet 12 to rotate, and driving the turbine blades 13 in the air inlet 11 to rotate, forming an air pressure difference in the air inlet 11, and injecting the air in the mine into the sampling pipe 2 through the suction pipe 10 and the air inlet 11, pushing the communication ball 4 downstream in the sampling pipe 2 to move. At this time, the sampling of the air sample in the mine is completed in the sampling pipe 2, as shown in FIG. Figure 7 As shown, air samples are sampled at monitoring terminal 1 at location A, and air samples are tested at monitoring terminal 1 at location B, thereby realizing the function of active sampling and testing and completing full-area monitoring within the mine.

[0051] Alternatively, the first electric valve 14 is closed and the second electric valve 15 is opened, so that the air between the two communication balls 4 is squeezed and discharged through the air outlet 12 and the exhaust pipe 9, thereby reducing the distance between the two communication balls 4.

[0052] During the full-area monitoring process, if abnormal conditions such as gas exceeding the limit are found in a certain area underground, active sampling and detection will be used to determine the impact range of the gas anomaly in the well, providing reference data for early warning, rescue and ventilation in the well.

[0053] Specifically, such as Figure 5 As shown, the first electric valve 14 and the second electric valve 15 are closed, and the air in the storage chamber 20 is sucked by the suction pump 18, forming a negative pressure in the sampling pipe 2. The air in the mine enters the sampling pipe 2 through the one-way valve 3 and is stored between the two communication balls 4;

[0054] In the mine, Figure 2 Air in the gas area shown enters the sampling pipe 2 through a one-way valve 3. The air sample is stored between two communication bulbs 4. Air is injected into the sampling pipe 2 and pushed to the monitoring terminal 1 at location B for testing. The ground monitoring center receives the gas detection data from the monitoring terminal 1 at location B via a communication link and can infer that a gas hazard exists in areas A and B.

[0055] Similarly, in the mine, Figure 3 The air in the gas area shown enters the sampling pipe 2 through the one-way valve 3. The air sample is stored between the two communication balls 4. Air is injected into the sampling pipe 2 to push the above air sample to the monitoring terminals 1 at locations B and C for air sample detection. The ground monitoring center receives the gas detection data from the monitoring terminals 1 at locations B and C through the communication link, and can infer that a gas hazard has occurred in the AC area.

[0056] The monitoring device proposed in the present invention is equipped with a sampling pipe 2 with a one-way valve 3 and a communication ball 4. The dispersed monitoring terminals 1 are connected through the sampling pipe 2. The negative pressure of the sampling pipe 2 is used to suck multiple air samples in the mine into the sampling pipe 2 through the one-way valve 3, and are respectively stored in the area between adjacent communication balls 4. They are transported along the sampling pipe 2 to the monitoring terminal 1 for detection, thereby realizing the function of active sampling detection. This design makes the sampling coverage in the mine wider, solves the problem of many detection blind spots in the area between the two terminals, and improves the authenticity and reliability of monitoring.

[0057] By arranging an electric pin 8, an exhaust pipe 9 and an intake pipe 10 in the monitoring terminal 1, the electric pin 8 is used to constrain the position of the communication ball 4, and the positive pressure of the sampling pipe 2 is used to discharge the air between adjacent communication balls 4, so that during active sampling and detection, the air sample in the well can be stored in the area between adjacent communication balls 4. This design of segmented storage of air samples facilitates the judgment of whether there is air anomaly between two monitoring terminals 1, and uses the installation position of each monitoring terminal 1 as a coordinate to realize the function of calculating the location of the accident.

[0058] In this embodiment, the air inlet end of the air injection pump 19 is connected to the test gas cylinder, and the test gas is delivered to the sampling pipe 2 through the test gas cylinder. Figure 7 As shown, an operation test is performed on each monitoring terminal 1, and a test medium is transported to each monitoring terminal 1 through a sampling pipe 2. For example, methane gas is used as the test medium to test whether the methane sensor in each monitoring terminal 1 is faulty. The fault point can be discovered in time for repair and replacement, thus avoiding larger mine accidents caused by misjudgment of detection. This design does not require maintenance personnel to check one by one, which greatly improves work efficiency.

[0059] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coal mine underground monitoring device, comprising a monitoring terminal (1), a sampling pipeline (2) and a driving unit, characterized in that: The driving unit is installed on the ground, and a plurality of monitoring terminals (1) are installed in the mine tunnel. The driving unit is connected to each monitoring terminal (1) through a sampling pipe (2); A plurality of one-way valves (3) are installed on the surface of a sampling pipe (2) located in a mine tunnel. Air in the mine tunnel enters the sampling pipe (2) through the one-way valves (3). A plurality of communication balls (4) are installed in the sampling pipe (2). The monitoring terminal (1) is equipped with a power storage unit (5), a detection module (6), a photoelectric sensor (7), an electric pin (8), an exhaust pipe (9) with an electric valve, and an intake pipe (10); The driving unit pumps air or sucks air into the sampling pipe (2), driving the communication ball (4) to circulate in the sampling pipe (2); When the sampling pipe (2) is under negative pressure, the air in the mine tunnel enters the sampling pipe (2) through the one-way valve (3); when the sampling pipe (2) is under positive pressure, the air in the sampling pipe (2) is input into the monitoring terminal (1), and the detection module (6) detects the air sample.

2. The underground coal mine monitoring device according to claim 1, characterized in that: An air inlet duct (11) and an air outlet duct (12) are fixedly installed in the monitoring terminal (1), and both the air inlet duct (11) and the air outlet duct (12) are connected to the sampling pipe (2). The air inlet duct (11) and the air outlet duct (12) are rotatably installed with turbine blades (13), and the two turbine blades (13) are driven by a belt (26). The air inlet duct (11) is connected to the outside of the monitoring terminal (1) through the air intake pipe (10), and the air outlet duct (12) is connected to the outside of the monitoring terminal (1) through the exhaust pipe (9).

3. The underground coal mine monitoring device according to claim 2, characterized in that: The electric pin (8) is arranged in the area between the air inlet tube (11) and the air outlet tube (12), the telescopic end of the electric pin (8) is kept extended into the sampling pipe (2), the detection end of the photoelectric sensor (7) is directed toward the sampling pipe (2), and when the photoelectric sensor (7) detects that the communication ball (4) approaches, the electric pin (8) is linked to perform a telescopic action once.

4. The underground coal mine monitoring device according to claim 3, characterized in that: The detection module (6) is fixedly mounted on the surface of the air outlet duct (12), and the detection module (6) comprises a methane sensor, a temperature sensor, a humidity sensor, and a carbon dioxide sensor for detecting the air medium in the air outlet duct (12).

5. The underground coal mine monitoring device according to claim 4, characterized in that: The exhaust pipe (9) is provided with a first electric valve (14), and the intake pipe (10) is provided with a second electric valve (15). When only the first electric valve (14) is opened, the air between the two communication balls (4) is squeezed into the air outlet tube (12) and then discharged from the exhaust pipe (9).

6. The underground coal mine monitoring device according to claim 5, characterized in that: The communication ball (4) is provided with a wireless communication module with its own power supply, and a plurality of communication balls (4) transmit data through the wireless communication module to form a communication chain. The monitoring terminal (1) is provided with a wireless receiving and transmitting module (16), and the detection data of the detection module (6) is transmitted to the ground monitoring center through the wireless receiving and transmitting module (16) and the communication chain.

7. The underground coal mine monitoring device according to any one of claims 1 to 6, characterized in that: The driving unit comprises a body (17), an air suction pump (18) and an air injection pump (19); a storage chamber (20) and a firing chamber (21) are provided inside the body (17); two ends of the sampling pipe (2) are respectively connected to the storage chamber (20) and the firing chamber (21); an air inlet end of the air suction pump (18) is connected to the storage chamber (20), and an air outlet end of the air injection pump (19) is connected to the firing chamber (21).

8. The underground coal mine monitoring device according to claim 7, characterized in that: A distribution disc (22) is rotatably mounted inside the storage chamber (20), a servo motor (23) is fixedly mounted on the upper side of the machine body (17), and the servo motor (23) drives the distribution disc (22) to rotate. A storage hole (24) is provided on the surface of the distribution disc (22), and the storage chamber (20) and the launch chamber (21) are connected through a material delivery window (25). The distribution disc (22) covers the upper end of the material delivery window (25), and a third electric valve (27) is provided between the air outlet end of the air injection pump (19) and the launch chamber (21).

9. The underground coal mine monitoring device according to claim 8, characterized in that: The air inlet end of the air injection pump (19) is connected to the test gas cylinder, and the test gas is transported into the sampling pipeline (2) through the test gas cylinder.

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