Coal mine geothermal-based water temperature monitoring and extraction simulation device

Abstract

The application provides a water temperature monitoring and extraction simulation device based on coal mine geothermal energy, and belongs to the technical field of geothermal energy. The device comprises a tank body, an inner cavity is arranged in the tank body, three isolation plates are fixedly connected in the inner cavity, the inner cavity is divided into three cavities by the isolation plates, a placing box with an open top is arranged in each cavity, prefabricated samples are placed in the placing boxes, a plurality of temperature sensors are prearranged in the prefabricated samples, and a vibration assembly is arranged outside the tank body. The isolation plates, the multiple pressure applying assemblies and the elastic rods with different heights are cooperated, so that the multiple stress environments of the coal mines with different depths can be simulated at the same time, the actual stratum differences are better matched, the water penetration is actively controlled by the lifting assembly, the underground water dynamic infiltration process is accurately restored, the static water supplement is avoided to be disconnected with the actual situation, the sample crack water is uniformly distributed by the vibration assembly through vibration, the local water accumulation or vacancy is prevented, and the accuracy and reliability of the water temperature monitoring data are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geothermal, in particular to a water temperature monitoring and extraction simulation device based on coal mine geothermal. BACKGROUND

[0002] In coal mining operations, the geothermal environment is one of the key factors affecting the safety and efficiency of mining. With the increasing depth of mining, the temperature of underground rock layers gradually increases, and the heat exchange between underground water and rock layers will further change the local geothermal field distribution. After the underground water penetrates into the rock layer cracks, it may absorb the heat of the rock layer to cause its temperature to rise, or it may affect the temperature of the surrounding rock layer through heat conduction, thereby causing safety hazards such as deformation of the well wall due to thermal stress and failure of equipment due to high temperature, and also affecting the rational extraction and utilization of coal mine geothermal resources.

[0003] In the Chinese patent with patent application number CN201711118444.5, a geothermal resource extraction simulation experiment device is disclosed, which includes a stratum simulation cavity, a rock pressing device, a hot liquid collection device, a heat source system, a temperature monitoring device, and a lateral pressure device. The rock used in the experiment is formed layer by layer in the stratum simulation cavity by the rock pressing device. The hot liquid collection device includes a U-shaped liquid collection pipe and a high-temperature pump. The U-shaped liquid collection pipe is laid after the rock is pressed, and the U-shaped liquid collection pipe is connected to the high-temperature pump through a high-temperature pipe. The lateral pressure device is used to apply pressure to the formed rock. The heat source system provides heat to the rock in the stratum simulation cavity, and the temperature monitoring device monitors the influence of hot liquid extraction on the temperature distribution of the rock layer. The present application more accurately simulates the structure and stress state of the geological rock layer, and the experimental data is more accurate and reliable. The existing related devices have distorted underground water penetration simulation. The underground water in the coal mine penetrates into the rock layer cracks dynamically, while the existing devices use a static water replenishment method, which cannot restore the natural penetration process of the water body in the rock layer cracks, resulting in that the water temperature monitoring results cannot reflect the temperature change law under the real penetration state. The present application lacks multi-depth pressure simulation. The pressure difference of the rock layer at different depths in the coal mine is significant, which directly affects the heat exchange efficiency of the underground water and the rock layer. The existing devices use a single pressure environment simulation, which cannot simultaneously compare the pressure and water temperature correlation data at different depths. The experimental efficiency is low and is disconnected with the actual working condition. The vibration environment influence is ignored. There is continuous vibration during the coal mining process, which can cause uneven distribution of water in the rock layer cracks, thereby interfering with the water temperature monitoring data. The existing device does not have a targeted vibration simulation component, which cannot exclude the interference of this factor on the experimental results.

[0004] Therefore, the present application provides a water temperature monitoring and extraction simulation device based on coal mine geothermal to meet the needs. SUMMARY

[0005] The technical problem to be solved by the present invention is to provide a water temperature monitoring and extraction simulation device based on geothermal energy in coal mines, so as to solve the problems of low fit and insufficient data accuracy of traditional simulation devices.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A water temperature monitoring and extraction simulation device based on geothermal energy in coal mines includes a tank with an internal cavity. Three partition plates are fixedly connected inside the internal cavity, dividing it into three chambers. Each chamber contains a top-open placement box containing a pre-fabricated sample. Several temperature sensors are pre-installed inside the pre-fabricated sample. A vibration assembly is located outside the tank, and a mounting plate is fixedly connected inside the tank. A lifting assembly is mounted on the mounting plate, and a pressure application assembly is located at the bottom of the lifting assembly. Each placement box has elastic rods of different heights at its bottom. The vertical height of each elastic rod is higher than the sample; the lifting assembly is located at the top of the tank and is used to squeeze water into the rock crevices to simulate the real scenario of the sample being infiltrated by groundwater; there are three vibration assemblies, each corresponding to a placement box, which are used to vibrate the sample to ensure that the groundwater in the sample crevices is more uniform; there are three sets of pressure application assemblies, each corresponding to a placement box, which are used to apply different pressures to the samples in different placement boxes to simulate the different pressures experienced by samples at different depths.

[0008] Optionally, the tank body is provided with three sealing doors, which are located between the inner cavity and the mounting plate.

[0009] Optionally, the vibration assembly includes a mounting box installed outside the tank, a linear direct drive motor installed inside the mounting box, a drive shaft connected to the drive end of the linear direct drive motor, the end of the drive shaft passing through the tank and the inner cavity into the placement box, and a vibration plate installed at the end of the drive shaft.

[0010] Optionally, a sealing connection is installed between the drive shaft and the tank, the inner cavity, and the placement box.

[0011] Optionally, the tank body is provided with observation windows through which the placement box can be observed. There are three observation windows, which are located next to the installation box. The part of the placement box facing the observation windows is made of tempered glass.

[0012] Optionally, the lifting assembly includes a stepper motor mounted on a mounting plate. The drive end of the stepper motor is driven by a threaded rod, and a slider is threadedly connected to the threaded rod. A sealing piston is mounted on the slider.

[0013] Optionally, the threaded rod is vertically arranged through the mounting plate, and the sliding block slides up and down between the top of the inner cavity and the bottom of the mounting plate.

[0014] Optionally, the pressure applying assembly comprises an electric telescopic rod, a fixed end of the electric telescopic rod is arranged at the bottom of the sealing piston, a telescopic end of the electric telescopic rod is fixedly connected with a driving plate, the bottom of the driving plate is fixedly connected with three connecting rods, the bottom of each connecting rod is fixedly connected with a pressing plate, a ventilation hole one is arranged on the pressing plate, a functional box is arranged at the bottom of the ventilation hole one, and a ventilation hole two is arranged above the side of the functional box.

[0015] Optionally, a guide rod is vertically arranged in the functional box, a sliding block two is slidably connected with the guide rod, and a through hole is arranged at the bottom of the functional box and can accommodate the elastic rod to pass through.

[0016] Optionally, when the sliding block two is located at the bottom of the functional box, the through hole can be blocked, and when the sliding block two is located at the top of the functional box, the ventilation hole one and the ventilation hole two can be blocked.

[0017] Compared with the prior art, the present application has at least the following advantages:

[0018] In the above scheme, by arranging the lifting assembly, the sealing piston of the lifting assembly extrudes the water body, actively pushes the water into the rock sample gap, accurately restores the dynamic infiltration process of underground water in underground rock layers, is different from the traditional static water replenishment mode, ensures that the experimental scene is consistent with the natural penetration law of underground water in coal mines, and makes the water temperature monitoring data more reflect the real geothermal change.

[0019] By arranging the vibration assembly corresponding to the placing box one, the linear direct-drive motor drives the vibration plate to vibrate the sample, on the one hand, the natural vibration state of the underground rock layer is reproduced, and on the other hand, the water in the sample gap is uniformly distributed, the monitoring deviation caused by local accumulation or vacancy of water is avoided, the authenticity of the simulation scene is further improved, and the detection personnel can observe the condition of the rock sample through the observation window and replace the damaged sample in time.

[0020] By arranging the pressure applying assembly, three isolation plates are arranged to divide independent cavities, and the elastic rods with different heights at the bottom are matched, so that the stress environment of coal mines at different depths can be simulated at the same time, the higher the elastic rod, the smaller the pressure borne by the rock sample and water in the corresponding cavity, the simulation of the shallow environment, the lower the elastic rod, the greater the pressure borne by the rock sample and water, the simulation of the deep environment, covering the difference of multiple strata, avoiding the disconnection between single environment simulation and actual coal mine geothermal scene, and providing a more real experimental basis for subsequent monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to make and use the application.

[0022] Figure 1 Fig. 1 is a perspective view of a coal mine geothermal water temperature monitoring and extraction simulation device;

[0023] Figure 2 Fig. 2 is a sectional view of the coal mine geothermal water temperature monitoring and extraction simulation device;

[0024] Figure 3 Fig. 3 is a perspective view of a tank and a placement box;

[0025] Figure 4 Fig. 4 is a perspective view of a vibration assembly;

[0026] Figure 5 Fig. 5 is a perspective view of a lifting assembly;

[0027] Figure 6 Fig. 6 is a perspective view of a pressure applying assembly;

[0028] Figure 7 Fig. 7 is a perspective view of the pressure applying assembly and the placement box;

[0029] Figure 8 Fig. 8 is a perspective view of Figure 7 Fig. 9 is an enlarged view of the structure at A in Fig. 8.

[0030] Reference signs:

[0031] 1, tank; 101, inner cavity; 102, isolation plate; 103, mounting plate; 104, sealing door; 2, placement box; 3, vibration assembly; 301, mounting box; 302, linear direct drive motor; 303, drive shaft; 304, vibration plate; 305, sealing connector; 306, observation window; 4, lifting assembly; 401, stepping motor; 402, threaded rod; 403, sliding block one; 404, sealing piston; 5, pressure applying assembly; 501, electric telescopic rod; 502, driving plate; 503, connecting rod; 504, pressing plate; 505, air hole one; 506, function box; 5061, air hole two; 5062, through hole; 5063, guide rod; 5064, sliding block two; 6, elastic rod.

[0032] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration and is not intended to limit the present application to the specific structures, devices and environments. According to specific needs, those skilled in the art can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0033] The coal mine geothermal-based water temperature monitoring and extraction simulation device provided by the present application is described in detail below in combination with the drawings and specific embodiments. It should be noted that the following embodiments are the best, preferred embodiments, and other alternative embodiments can also be implemented by those skilled in the art for some known technologies; and the drawings are only used to more specifically describe the embodiments and are not intended to specifically limit the present application.

[0034] As shown in the drawings, Figures 1 to 8 The coal mine geothermal-based water temperature monitoring and extraction simulation device provided by the present application includes a tank body 1, an inner cavity 101 is arranged inside the tank body 1, three isolation plates 102 are fixedly connected inside the inner cavity 101, the inner cavity 101 is divided into three cavities by the isolation plates 102, a placing box 2 with an open top is arranged in each cavity, a prefabricated sample is placed in the placing box 2, a plurality of temperature sensors are pre-set inside the prefabricated sample, a vibration assembly 3 is arranged outside the tank body 1, a mounting plate 103 is fixedly connected inside the tank body 1, a lifting assembly 4 is arranged on the mounting plate 103, a pressure applying assembly 5 is arranged at the bottom of the lifting assembly 4, an elastic rod 6 with different heights is arranged at the bottom of each placing box 2, the vertical height of the elastic rod 6 is higher than that of the sample, the lifting assembly 4 is arranged at the top inside the tank body 1, the lifting assembly 4 is used to extrude water into rock crevices to simulate the real scene of the sample being penetrated by underground water, the vibration assembly 3 is arranged in three groups, each vibration assembly 3 corresponds to one placing box 2, the vibration assembly 3 is used to shock the sample to ensure that the underground water in the sample crevice is more uniform, the pressure applying assembly 5 is arranged in three groups, each group of pressure applying assembly 5 corresponds to one placing box 2, the pressure applying assembly 5 is used to apply different pressures to the samples in different placing boxes 2 to simulate the different pressures borne by samples at different depths, three sealing doors 104 are arranged on the tank body 1, the sealing doors 104 are located between the inner cavity 101 and the mounting plate 103, and through the isolation plates 102 and the plurality of groups of pressure applying assemblies 5, in cooperation with the elastic rods 6 with different heights, the different stress environments of the coal mines at different depths can be simulated at the same time, which is more consistent with the actual stratum differences, provides a real and diverse experimental basis for monitoring, the lifting assembly 4 actively controls water penetration, accurately restores the dynamic infiltration process of underground water, avoids the disconnection between static water replenishment and actual conditions, ensures that the water temperature monitoring data truly reflects the geothermal change law under the penetration state, each vibration assembly 3 corresponds to one placing box 2, the water in the sample crevice is uniformly distributed through the shock, prevents local accumulation or vacancy of water, and improves the accuracy and reliability of the water temperature monitoring data.

[0035] As shown in the drawings, Figure 1 and Figure 4As shown, the vibration assembly 3 includes a mounting box 301 mounted outside the tank body 1, a linear direct drive motor 302 is mounted inside the mounting box 301, the driving end of the linear direct drive motor 302 is drivingly connected with a driving shaft 303, the distal end of the driving shaft 303 penetrates the tank body 1 and the inner cavity 101 and enters the placement box 2, a vibration plate 304 is mounted at the distal end of the driving shaft 303, the driving shaft 303 is mounted with a sealing connector 305 between the tank body 1, the inner cavity 101 and the placement box 2, the tank body 1 is provided with an observation window 306 through which the placement box 2 can be observed, the observation window 306 is provided with three, the observation window 306 is located beside the mounting box 301, the part of the placement box 2 opposite to the observation window 306 is made of tempered glass material, the water leakage inside the cavity is effectively prevented through the sealing connector 305, the key parameters such as temperature and pressure in the experiment process are not disturbed by the outside world, the stability of the simulation environment is maintained, the effectiveness of the monitoring data is ensured, the sample shock state and the moisture penetration condition are observed by the experiment personnel in real time through the observation window 306, and the damaged sample can be replaced in time.

[0036] As shown in Figures 5 to 8 The lifting assembly 4 includes a stepping motor 401, the stepping motor 401 is mounted on the mounting plate 103, the driving end of the stepping motor 401 is drivingly connected with a threaded rod 402, a sliding block one 403 is threadedly connected on the threaded rod 402, a sealing piston 404 is mounted on the sliding block one 403, the threaded rod 402 is vertically arranged through the mounting plate 103, the sliding block one 403 slides up and down between the top of the inner cavity 101 and the bottom of the mounting plate 103, the sealing piston 404 is mounted on the sliding block one 403, a closed space is formed between the top of the inner cavity 101 and the bottom of the mounting plate 103, the pressure loss is small when the water is extruded, the driving force of the lifting assembly 4 can be efficiently converted into the osmotic pressure of the water, the water into the rock crevice is ensured, and the real osmotic pressure environment is restored.

[0037] As shown in Figures 5 to 8As shown, the pressure applying assembly 5 comprises an electric telescopic rod 501, the fixed end of the electric telescopic rod 501 is installed at the bottom of the sealing piston 404, the telescopic end of the electric telescopic rod 501 is fixedly connected with a driving plate 502, the bottom of the driving plate 502 is fixedly connected with three connecting rods 503, the bottom of each connecting rod 503 is fixedly connected with a pressing plate 504, the pressing plate 504 is provided with a gas hole one 505, the bottom of the pressing plate 504 is provided with a function box 506, the function box 506 is arranged at the bottom of the gas hole one 505, the upper side of the function box 506 is provided with a gas hole two 5061, the function box 506 is vertically provided with a guide rod 5063, the guide rod 5063 is slidably connected with a sliding block two 5064, the bottom of the function box 506 is provided with a through hole 5062, the through hole 5062 can accommodate the elastic rod 6 to pass through, when the sliding block two 5064 is located at the bottom of the function box 506, the through hole 5062 can be blocked, when the sliding block two 5064 is located at the top of the function box 506, the gas hole one 505 and the gas hole two 5061 can be blocked, through the design of the function box 506 and the elastic rod 6 of different heights, the elastic rod 6 with the maximum height is placed in the box 2, the rock sample and the water bear smaller pressure, the elastic rod 6 with the minimum height is placed in the box 2, the rock sample and the water bear larger pressure, so that the influence of the water at different depths and different pressures on the temperature of the rock sample is simulated and tested.

[0038] The working principle of the technical scheme provided by the application is as follows:

[0039] Before simulation test, the step motor 401 controls the lifting assembly 4 and the pressure applying assembly 5 to be lifted together to the top of the tank body 1, the sealing door 104 on the side is opened, the prefabricated rock sample is placed in the three placing boxes 2 at the bottom respectively, equal amount of isothermal water is injected into each placing box 2, the real scene of the underground water entering the rock gap is simulated, then the sealing door 104 is closed, and the temperature change is recorded through the temperature sensor pre-buried in the rock sample.

[0040] After preparation, the step motor 401 drives the sealing piston 404 to move downward along the threaded rod 402, drives the pressure applying assembly 5 to move downward, in the moving process, the gas in the tank body 1 enters the function box 506 through the gas hole one 505 arranged on the pressing plate 504, then enters the bottom of the pressing plate 504 from the gas hole two 5061 arranged on the side of the function box 506, since the pressing plate 504 is tightly attached to the inner wall of the placing box 2 to form a sealed interval after entering the placing box 2, the air pressure in the placing box 2 increases, the water injected into the placing box 2 is subjected to pressure, and it is ensured that the water enters the gap of the rock sample, and the accuracy of the temperature determination of the rock sample is improved.

[0041] After the sealing piston 404 is lowered to a certain distance, the step motor 401 is closed, and then the electric telescopic rod 501 is controlled to extend, so that the driving plate 502 at the moving end of the electric telescopic rod 501 is driven to move downwards, and the three pressing plates 504 at the bottom of the driving plate 502 are simultaneously inserted into different placing boxes 2, respectively. With the downward movement of the pressing plate 504, the elastic rod 6 is inserted into the functional box 506 through the through hole 5062 at the bottom of the functional box 506, and the sliding block two 5064 is driven to move upwards along the guide rod 5063, and finally contacts the lower surface of the pressing plate 504. At this time, the sliding block two 5064 blocks the air hole one 505 and the air hole two 5061. Since the elastic rods 6 arranged at the bottom of each placing box 2 are different in height and are all higher than the rock sample, the elastic rod 6 with the highest height first pushes the sliding block two 5064 to contact the lower surface of the pressing plate 504, and with the continuous downward movement of the pressing plate 504, the elastic rod 6 is compressed, and an opposite force is applied to the upper pressing plate 504, thereby reducing the pressure applied to the rock sample by the final pressing plate 504. The elastic rod 6 with the lowest height is the lightest in compression, so that the rock sample in the placing box 2 is subjected to the smallest pressure, thereby simulating the different pressures of the rock at different depths and testing the influence of different pressures on the temperature of the rock sample.

[0042] Similarly, since the elastic rods 6 arranged at the bottom of each placing box 2 are different in height and are all higher than the rock sample, the elastic rod 6 with the highest height first pushes the sliding block two 5064 to contact the lower surface of the pressing plate 504, and with the continuous downward movement of the pressing plate 504, the elastic rod 6 is compressed, and an opposite force is applied to the upper pressing plate 504, thereby reducing the pressure applied to the rock sample by the final pressing plate 504. The elastic rod 6 with the lowest height is the lightest in compression, so that the rock sample in the placing box 2 is subjected to the smallest pressure, thereby simulating the different pressures of the rock at different depths and testing the influence of different pressures on the temperature of the rock sample.

[0043] When the experiment starts, the vibration assembly 3 is synchronously started, the linear direct drive motor 302 is controlled to drive the driving shaft 303 to reciprocate, the vibration plate 304 at the end of the driving shaft 303 vibrates the rock sample, and the sealing connector 305 effectively prevents the water in the placing box 2 from leaking out, thereby simulating the real vibration situation underground, and on the other hand, the vibration can make the water in the gap of the rock sample more uniform, and the detection personnel can observe the situation of the rock sample through the observation window 306 and replace the damaged sample in time.

[0044] The present application covers any substitutions, modifications, equivalent methods and schemes made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be completely understood without the description of these details for those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0045] The above merely preferred embodiments of the present application, it should be noted that for those of ordinary skill in the art, without departing from the principles of the present application, can also be made several improvements and refinements, these improvements and refinements should also be considered as the scope of protection of the present application.

Claims

1. A coal mine geothermal-based water temperature monitoring extraction simulation device, characterized in that, The utility model provides a kind of rock sample temperature test device, including tank (1), the inside of the tank (1) is provided with inner cavity (101), three isolation plates (102) are fixedly connected inside the inner cavity (101), the inner cavity (101) is divided into three cavities by the isolation plate (102), and each cavity is provided with the open-top placing box (2), and the prefabricated sample is placed in the placing box (2), and a plurality of temperature sensors are preset in the prefabricated sample, the tank (1) is provided with vibration assembly (3) outside, the tank (1) is fixedly connected with mounting plate (103) inside, the mounting plate (103) is provided with lifting assembly (4), the lifting assembly (4) is provided with pressure applying assembly (5) at bottom, and the bottom of each placing box (2) is provided with different height elastic stick (6), and the vertical height of the elastic stick (6) is higher than sample; The lifting assembly (4) is arranged at the top of the tank (1), and is used for extruding water into rock crevices to simulate the influence of underground water at different depths on the temperature of rock samples. The vibration assembly (3) is arranged in three, and each vibration assembly (3) corresponds to a placing box (2). The vibration assembly (3) is used for simulating the real vibration condition of the underground and ensuring that the underground water in the sample crevice is more uniform. The pressure applying assembly (5) is arranged in three groups, and each group of pressure applying assembly (5) corresponds to a placing box (2). The pressure applying assembly (5) is used for simulating different pressures on rocks at different depths and testing the influence of different pressures on the temperature of rock samples.

2. The coal mine geothermal based water temperature monitoring extraction simulation device according to claim 1, characterized in that, The tank (1) is provided with three sealing doors (104) between the inner cavity (101) and the mounting plate (103).

3. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 2, wherein, The vibration assembly (3) includes a mounting box (301) mounted on the outside of the tank (1). A linear direct-drive motor (302) is mounted in the mounting box (301). A driving shaft (303) is drivingly connected to the driving end of the linear direct-drive motor (302). The distal end of the driving shaft (303) penetrates the tank (1) and the inner cavity (101) and enters the placing box (2). A vibration plate (304) is mounted at the distal end of the driving shaft (303).

4. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 3, wherein, A sealing connector (305) is mounted between the driving shaft (303) and the tank (1), the inner cavity (101), and the placing box (2).

5. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 4, wherein, The tank (1) is provided with observation windows (306) through which the placing boxes (2) can be observed. The observation windows (306) are arranged in three. The observation windows (306) are arranged beside the mounting box (301). The part of the placing box (2) facing the observation windows (306) is made of tempered glass.

6. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 5, wherein, The lifting assembly (4) includes a stepping motor (401) mounted on the mounting plate (103). A threaded rod (402) is drivingly connected to the driving end of the stepping motor (401). A sliding block one (403) is threadedly connected to the threaded rod (402). A sealing piston (404) is mounted on the sliding block one (403).

7. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 6, wherein, The threaded rod (402) is vertically arranged through the mounting plate (103), and the slider one (403) slides up and down between the top of the inner cavity (101) and the bottom of the mounting plate (103).

8. The coal mine geothermal based water temperature monitoring extraction simulation device of claim 7, wherein, The pressing assembly (5) comprises an electric telescopic rod (501), the fixed end of the electric telescopic rod (501) is installed at the bottom of the sealing piston (404), the telescopic end of the electric telescopic rod (501) is fixedly connected with a driving plate (502), the bottom of the driving plate (502) is fixedly connected with three connecting rods (503), the bottom of each connecting rod (503) is fixedly connected with a pressing plate (504), the pressing plate (504) is provided with a ventilation hole one (505), the bottom of the pressing plate (504) is provided with a function box, the function box is arranged at the bottom of the ventilation hole one (505), and the upper side of the function box is provided with a ventilation hole two (5061).

9. The coal-mine geothermal-based water temperature monitoring extraction simulation device according to claim 8, characterized in that, A guide rod (5063) is vertically arranged in the function box, a slider two (5064) is slidably connected to the guide rod (5063), and a through hole (5062) is arranged at the bottom of the function box.

10. The coal-mine geothermal-based water temperature monitoring extraction simulation device of claim 9, wherein, When the slider two (5064) is located at the bottom of the function box, the through hole (5062) can be blocked, and when the slider two (5064) is located at the top of the function box, the ventilation hole one (505) and the ventilation hole two (5061) can be blocked. When the slider two (5064) is located at the bottom of the function box, the through hole (5062) can be blocked, and when the slider two (5064) is located at the top of the function box, the ventilation hole one (505) and the ventilation hole two (5061) can be blocked.

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