Mine aquifer fracture plugging device

Abstract

The invention discloses a mine aquifer fracture plugging device, and belongs to the technical field of mine water disaster prevention and control, a main pipeline is placed at a preset mine aquifer fracture plugging operation point, one end of the main pipeline is connected with a secondary pipeline in an inserted mode, and the secondary pipeline is used for conveying macromolecular compression-resistant flexible materials into fractures. And the expansion filling module performs plugging operation based on a water-encountering self-expansion filling mechanism. The expansion filling module comprises a stainless steel lantern ring fixed to the outer surface of the secondary pipeline, the stainless steel lantern ring is filled with a compacted water-swelling material, sodium polyacrylate bentonite is selected as the water-swelling material, and the expansion rate of the water-swelling material is adjusted by adding polyvinyl alcohol cross-linking agents of different proportions. The device works based on a filling mechanism capable of automatically expanding when encountering water, extra power is not needed to drive the expansion process, dependence on external equipment can be reduced, the complexity of the working process is reduced, the adaptability of the device to different fracture conditions is improved, and the fracture plugging effect and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mine water disaster prevention and treatment, and particularly relates to a mine aquifer fissure sealing device. BACKGROUND

[0002] In the process of mine exploitation, the aquifer fissure is one of the main hidden dangers leading to mine water disasters. The current commonly used fissure sealing technology mainly includes grouting sealing method, expansion material filling method and the like, but these technologies generally have the following problems:

[0003] Low sealing efficiency: the traditional grouting technology relies on manual control of grouting pressure and flow, and it is difficult to dynamically adjust parameters according to the actual situation of the fissure, and the phenomenon of uneven diffusion of slurry, leakage or over-injection is easy to occur, resulting in a long sealing period and the inability to quickly curb water gushing.

[0004] Poor adaptability: most of the existing sealing devices are designed for single-form fissures, and it is difficult to achieve all-round filling for complex conditions such as cross fissures and irregular fissures, and leakage channels are easy to be left, which has a high risk of recurrence in the later period.

[0005] Material performance limitations: the traditional water-swelling material has the problems of uncontrollable expansion ratio and too slow or too fast expansion speed. Too slow expansion will result in poor initial sealing effect and failure to stop water gushing in time. Too fast expansion may cause voids in the material, reducing the sealing tightness, and the compression resistance of some materials is insufficient, which is easy to break and fail under high water pressure. SUMMARY

[0006] The purpose of the present application is to provide a mine aquifer fissure sealing device to solve the problems raised in the background technology.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a mine aquifer fissure sealing device, comprising a main pipeline, the main pipeline is placed at a predetermined mine aquifer fissure sealing operation point, one end of the main pipeline is connected with a secondary pipeline, the secondary pipeline is used to transport a high molecular pressure-resistant flexible material into the fissure;

[0008] An expansion filling module, the expansion filling module is based on a water-swelling self-expansion filling mechanism to perform sealing operation;

[0009] The expansion filling module comprises a stainless steel collar fixed on the outer surface of the secondary pipeline, the inside of the stainless steel collar is filled with compacted water-swelling material, the water-swelling material is selected from sodium polyacrylate-based bentonite, the expansion ratio of which is adjusted by adding different proportions of polyvinyl alcohol crosslinking agent, and the expansion time is controlled within 5-15 minutes.

[0010] Preferably, the tail end of the secondary pipeline is inclined, the inclination angle is 4-6 degrees, the high polymer compression-resistant flexible material is composed of a base phase, a filling phase and a self-flowing promoter, the base phase is a flexible base material with good fluidity, filling property and water swelling property, is selected from modified hydrogel, polyurethane, acrylate polymer or a mixture thereof, and the viscosity of the base phase in a dry or uncured state is less than or equal to 500 mPa s, the filling phase comprises fine aggregate or nano filler, the fine aggregate is selected from fine sand or fly ash, and the particle size is 0.1-1.0 mm, the nano filler is selected from nano silicon dioxide or nano calcium carbonate, and the particle size is less than or equal to 100 nm, and the self-flowing promoter is a composite surfactant.

[0011] Preferably, one end surface of the secondary pipeline is provided with a clamping groove, and the longitudinal section of the clamping groove is in a J-shaped structure, a butyl rubber block is embedded in the clamping groove, and an opening is arranged at the center position of the butyl rubber block.

[0012] Preferably, one end of the secondary pipeline is designed as a flared opening, and the main pipeline is made of light metal.

[0013] Preferably, the outer surface of the secondary pipeline is provided with an electromagnet, and the outer surface of the electromagnet is attached to the surface of the flared opening of the main pipeline.

[0014] Preferably, the composite surfactant is obtained by compounding fatty alcohol polyoxyethylene ether and sodium alkyl benzene sulfonate at a mass fraction of 1:1.

[0015] Preferably, a plurality of notches are arranged on the outer surface of the other end of the secondary pipeline.

[0016] Preferably, the intelligent control module has intelligent monitoring and control functions, is used for real-time data acquisition and dynamic adjustment of operation parameters, and comprises an external touch screen operation interface and a sensor group, the sensor group comprises a pressure sensor, a flow sensor and a temperature sensor, and is used for real-time monitoring of slurry state and feedback of data to a central processor.

[0017] Preferably, the intelligent control module is electrically connected with the electromagnet, and is used for disconnecting the main pipeline and the secondary pipeline after sealing.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1、The application is made by the self-expanding filling machine based on water, without additional power-driven expansion process, which can reduce the dependence on external equipment and reduce the complexity of the operation process in the complex mine operation environment. At the same time, the water-swelling material is selected from sodium polyacrylate-based bentonite, and the expansion ratio can be adjusted by the proportion of polyvinyl alcohol crosslinking agent, which can be flexibly adjusted according to the actual working conditions such as crack width and water inflow. For example, low-expansion ratio material is selected for narrow cracks to avoid over-expansion and crack the rock layer, and high-expansion ratio material is selected for wide cracks to ensure full filling, which improves the adaptability of the device to different crack conditions and improves the sealing effect and efficiency of the cracks.

[0020] 2、The application changes the problem of single material conveying direction of traditional straight pipe by setting the 4°-6° inclination of the secondary pipeline tail end. In actual sealing operation, the inclined structure can make the high-molecular pressure-resistant flexible material inject into the crack at an angle. For horizontal cracks, it can expand the diffusion range of the material in the length direction of the crack, and for vertical cracks, it can avoid the material from concentrating at the bottom of the crack due to gravity, realize uniform filling of the upper and lower parts of the crack, and reduce the blind area caused by uneven distribution of the material. And through the preparation of high-molecular pressure-resistant flexible material, the slurry can better fill the small cracks, improve the density and reduce the risk of later leakage. The addition of self-flowing accelerator can further optimize the fluidity of the material to ensure that the material can adapt to the irregular shape of the crack and realize all-round filling.

[0021] 3、The application realizes firm fixation of the butyl rubber block 7 through the J-shaped clamping slot to prevent displacement of the butyl rubber block during grouting. The butyl rubber block has excellent elasticity and sealing property, which not only improves the convenience of removing the grouting pipe, but also avoids the backflow of the slurry from the secondary pipeline to the main pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the secondary pipeline of the application;

[0024] Figure 3 is a schematic diagram of the three-dimensional assembly structure of the butyl rubber block and the secondary pipeline of the application;

[0025] Figure 4 is a schematic diagram of the planar assembly structure of the secondary pipeline and the expansion filling module of the application;

[0026] Figure 5 is a plan view of the application;

[0027] Figure 6 is a longitudinal sectional view of the application.

[0028] In the figure: 1, main pipe; 2, secondary pipe; 3, stainless steel ring; 4, water-swelling material; 5, electromagnet; 6, clamping groove; 7, butyl rubber block; 8, notch. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Embodiment one

[0031] Please refer to Figures 1-6 The present application provides a mine aquifer fissure sealing device, which comprises a main pipe 1, the main pipe 1 is placed at a preset mine aquifer fissure sealing operation point, one end of the main pipe 1 is connected with a secondary pipe 2, and the secondary pipe 2 is used for conveying a high-molecular pressure-resistant flexible material into the fissure. An expansion filling module is used for sealing operation based on a water-swelling self-expansion filling mechanism. The expansion filling module comprises a stainless steel ring 3 fixed on the outer surface of the secondary pipe 2, the inside of the stainless steel ring 3 is filled with compacted water-swelling material 4, the water-swelling material 4 is selected from sodium polyacrylate-based bentonite, the expansion ratio of the water-swelling material 4 is adjusted by adding different proportions of polyvinyl alcohol crosslinking agent, and the expansion time is controlled within 5-15 minutes.

[0032] Further, the expansion filling module comprises a stainless steel ring 3 fixed on the outer surface of the secondary pipe 2, the number of the stainless steel rings 3 can be matched with the length of the secondary pipe 2, and the stainless steel rings 3 are fixed on the outer surface of the secondary pipe 2 by welding to ensure the structural stability. The inside of the stainless steel ring 3 is filled with compacted water-swelling material 4, the water-swelling material 4 is selected from sodium polyacrylate-based bentonite, the material has high water absorption and expansion and excellent pressure resistance. The expansion ratio of the water-swelling material 4 is adjusted by adding different proportions of polyvinyl alcohol crosslinking agent, when the addition amount of the polyvinyl alcohol crosslinking agent is 5%-15%, the expansion ratio can be controlled within 5-20 times, and the appropriate expansion ratio can be selected according to the fissure width and water pressure. The expansion time is controlled within 5-15 minutes, which is realized by adjusting the particle size of the material, the smaller the particle size, the faster the expansion speed, and after the slurry injection is completed, the expansion material can timely expand and fill the small fissures not covered by the slurry, so as to form a double sealing structure of slurry sealing and expansion material sealing.

[0033] The tail end of the secondary pipeline 2 is inclined, and the inclination angle is 4°-6°. The polymer pressure-resistant flexible material is composed of a base phase, a filling phase and a self-flowing promoter. The base phase is a flexible matrix material with good fluidity, filling property and water-swelling property, and is selected from modified hydrogel, polyurethane, acrylate polymer or a mixture thereof. The viscosity of the base phase in a dry or uncured state is ≤500 mPa·s. The filling phase contains fine aggregate or nano filler. The fine aggregate is selected from fine sand or fly ash, and the particle size range is 0.1-1.0 mm. The nano filler is selected from nano silicon dioxide or nano calcium carbonate, and the particle size is ≤100 nm. The self-flowing promoter is a composite surfactant.

[0034] Further, the tail end of the secondary pipeline 2 is inclined, which can enable the polymer pressure-resistant flexible material to be injected into the fissure at an oblique angle, increase the diffusion range of the slurry in the fissure, and be particularly suitable for plugging vertical or inclined fissures, thereby avoiding the slurry from being concentrated at the bottom of the fissure due to gravity. The inclined arrangement of the secondary pipeline 2 also enables the slurry to be filled in a self-flowing manner, thereby improving the matching of the plugging material and the fissure. The secondary pipeline 2 is used to transport the polymer pressure-resistant flexible material into the fissure. The material is composed of a base phase, a filling phase and a self-flowing promoter in a mass ratio of 5:3:2, and the properties of the components are as follows:

[0035] The base phase is a flexible matrix material with good fluidity, filling property and water-swelling property, and is selected from modified hydrogel, polyurethane, acrylate polymer or a mixture thereof, preferably a mixture of modified hydrogel and polyurethane in a mass ratio of 1:1. The viscosity of the base phase in a dry or uncured state is ≤500 mPa·s, which ensures that the material has excellent fluidity and can smoothly diffuse to all parts of the fissure through the slot 8 of the secondary pipeline 2. After curing, the material has a certain flexibility and can adapt to the slight displacement of the mine stratum, thereby avoiding cracking of the material due to stratum deformation.

[0036] The filling phase contains fine aggregate or nano filler, which is used to enhance the compressive strength and wear resistance of the material. The fine aggregate is selected from fine sand or fly ash, and the particle size range is 0.1-1.0 mm. The addition of the fine aggregate can improve the volume stability of the material and reduce the curing shrinkage. The nano filler is selected from nano silicon dioxide or nano calcium carbonate, and the addition amount is 5%-10% of the mass of the filling phase. The nano filler can fill the small pores in the material and improve the density and compressive strength of the material.

[0037] Self-flowing accelerator: a composite surfactant, which is compounded by fatty alcohol polyoxyethylene ether and sodium alkyl benzene sulfonate with a mass fraction of 1:1. The surfactant can reduce the surface tension of the material, improve its self-flowing and wetting in the fissure, ensure that the material can fully fill the corner parts of the fissure, and avoid the occurrence of voids or dead angles. At the same time, it can delay the curing speed of the material, providing sufficient time for the diffusion of the slurry.

[0038] One end surface of the secondary pipeline 2 is provided with a clamping groove 6, and the longitudinal section of the clamping groove 6 is in J-shaped structure. A butyl rubber block 7 is embedded in the clamping groove 6, and an opening is arranged at the center position of the butyl rubber block 7.

[0039] Further, the surface of the secondary pipeline 2 near one end of the main pipeline 1 is provided with a clamping groove 6, and the longitudinal section of the clamping groove 6 is in J-shaped structure. A butyl rubber block 7 is embedded in the clamping groove 6, and an opening is arranged at the center position of the butyl rubber block 7. The J-shaped clamping groove 6 can achieve firm fixation of the butyl rubber block 7, preventing it from shifting during grouting. The butyl rubber block 7 has excellent elasticity and sealing performance, which can effectively block the return of the slurry from the main pipeline 1, while the central opening does not affect the normal transportation of the slurry. After grouting is completed, the grouting pipe needs to be withdrawn from the main pipeline 1 and the secondary pipeline 2. Only the grouting pipe needs to be withdrawn outward, and the slurry in the secondary pipeline 2 will be intercepted in the butyl rubber block 7 during the withdrawal process. When the grouting pipe is withdrawn from the opening of the butyl rubber block 7, a period of time can be waited for the slurry remaining in the opening to semi-solidify before withdrawing the grouting pipe. This not only improves the convenience of withdrawing the grouting pipe, but also avoids the backflow of the slurry from the secondary pipeline 2 to the main pipeline 1.

[0040] The end of the main pipeline 1 connected with the secondary pipeline 2 is designed in a trumpet-shaped opening, and the main pipeline 1 is made of lightweight metal. The outer surface of the secondary pipeline 2 is provided with an electromagnet 5, and the outer surface of the electromagnet 5 is in close contact with the trumpet-shaped opening surface of the main pipeline 1.

[0041] Further, the main pipeline is made of lightweight metal, which not only ensures the structural strength of the pipeline, but also greatly reduces the overall weight of the device. The space for underground operation in a mine is limited, and manual transportation of equipment to the operation point is often required. Lightweight design can reduce the labor intensity of the operating personnel, facilitate the movement and installation of the device in narrow tunnels and complex terrain, improve the operation flexibility, and is especially suitable for deep mines or scenes where large-scale transportation equipment cannot be used. Lightweight metal can be selected from aluminum alloy or titanium alloy. The secondary pipeline 2 is inserted into the trumpet-shaped opening end of the main pipeline 1, and the outer surface of the secondary pipeline 2 is provided with an electromagnet 5, and the outer surface of the electromagnet 5 is in close contact with the trumpet-shaped opening surface of the main pipeline 1. The rapid fixation of the main pipeline 1 and the secondary pipeline 2 is achieved through the magnetic attraction of the electromagnet 5, and the separation after sealing is facilitated.

[0042] A plurality of notches 8 are arranged on the outer surface of the other end of the secondary pipeline 2.

[0043] Further, the other end outer surface of the secondary pipeline 2 away from the main pipeline 1 is provided with symmetrically arranged notches 8, the number of notches 8 is 2-4, preferably 2. The slurry is uniformly injected into the fissure through the notches 8, avoiding the problem of uneven slurry diffusion caused by a single grouting port, especially suitable for fissure plugging with a larger width.

[0044] It also includes an intelligent control module with intelligent monitoring and control functions for real-time data acquisition and dynamic adjustment of operating parameters. The intelligent control module includes an external touch screen operation interface and a sensor group, which includes a pressure sensor, a flow sensor and a temperature sensor for real-time monitoring of slurry state and data feedback to the central processor. The intelligent control module is electrically connected with the electromagnet 5 for disconnecting the connection between the main pipeline 1 and the secondary pipeline 2 after plugging.

[0045] Further, the intelligent control module includes an external touch screen operation interface, a sensor group and a central processor, which adopts an industrial-grade PLC with model S7-1200. The touch screen operation interface adopts an intrinsically safe design, which can be used stably in a wet and dusty environment underground. The operator can real-time view the operating parameters, set target parameters and start / stop the operation through the interface. The sensor group includes a pressure sensor, a flow sensor and a temperature sensor, which are installed near the notches 8 of the secondary pipeline 2 and outside the expansion filling module, respectively, for real-time monitoring of slurry pressure, flow and material temperature, and feeding data to the central processor in 485 communication protocol. After receiving the sensor data, the central processor dynamically adjusts the pressure and flow of the grouting equipment through the built-in algorithm. For example, when the pressure sensor detects that the slurry pressure exceeds the preset value, the central processor automatically reduces the speed of the grouting pump to reduce the flow, avoiding the expansion of the fissure caused by excessive pressure. When the flow sensor detects a sudden drop in flow, it is judged that there may be pipeline blockage, and an alarm signal is immediately sent out, and the operator is suggested to pause the operation to check the pipeline.

[0046] Example Two

[0047] On the basis of example one, the expansion filling module can also use a graded expansion material of fast expansion layer and slow expansion layer.

[0048] Further, the inflation filling module can also use a staged inflation material of a fast inflation layer and a slow inflation layer. The fast inflation layer selects a fine particle sodium polyacrylate-based bentonite, adds 8% polyvinyl alcohol crosslinking agent, has an inflation time of 6 minutes, and has an inflation ratio of 8 times, so as to quickly fill the gap between the secondary pipeline 2 and the fissure wall, and form an initial seal. The slow inflation layer selects a coarse particle sodium polyacrylate-based bentonite, adds 12% polyvinyl alcohol crosslinking agent, has an inflation time of 14 minutes, and has an inflation ratio of 15 times, so as to slowly inflate and block the fissure, and according to different filling positions, the slow inflation layer can penetrate into the deep part of the fissure and fill the small channels, while avoiding material cracking caused by rapid inflation, and is suitable for high water pressure fissure blocking scenes.

[0049] Embodiment three

[0050] On the basis of embodiment one, the intelligent control module is provided with a sealing process parameter library, the sealing process parameter library includes preset parameters of horizontal, vertical and cross fissures, the one-key starting unit is provided with an LED indicator light, the system automatically calls the parameters after the operator selects the fissure type, and the central processor dynamically adjusts the grouting pressure and the like through a PID algorithm.

[0051] Further, the intelligent control module is also provided with a one-key starting unit, which is provided with an LED indicator light, green for normal and red for fault, the operator selects the corresponding type on the touch screen interface after determining the fissure type through on-site observation or preliminary detection, and the system automatically calls the preset parameters in the parameter library without manual setting. The operator determines that the fissure is a cross fissure through on-site observation, selects the “cross fissure” type on the touch screen interface, and the system automatically calls the preset parameters. The central processor dynamically adjusts the grouting pressure, flow and the like through a PID algorithm, so that the deviation between the actual parameters and the preset parameters is controlled within ±5%, which is suitable for inexperienced operators or emergency sealing scenes, and reduces the operation difficulty. In the grouting process, both branches of the cross fissure can be fully filled with slurry, manual angle adjustment is not needed, the operation time can be effectively shortened, and the sealing effect is good.

[0052] The working principle and use process of the present application are as follows: first, check the integrity of the main pipeline 1 and the secondary pipeline 2 to ensure that there is no damage or blockage. Confirm that the electromagnet 5 is normally magnetized after being powered on, and the butyl rubber block 7 is firmly embedded without loosening.

[0053] Then, mix the matrix phase, the filling phase and the self-flowing accelerator according to the mass ratio of 5:3:2, mix the modified hydrogel and the polyurethane at a ratio of 1:1, stir uniformly, and then pour into the hopper of the grouting equipment to ensure that the material viscosity is ≤500 mPa・s. Fill the water-swelling material 4 in the stainless steel sleeve ring 3, select sodium polyacrylate-based bentonite, add 10% polyvinyl alcohol crosslinking agent, control the inflation ratio to 10 times, control the inflation time to 10 minutes, and compact after filling.

[0054] Then the secondary pipeline 2 is inserted into the trumpet-shaped opening end of the main pipeline 1, ensuring that the electromagnet 5 is attached to the inner surface of the main pipeline 1, the electromagnet 5 is powered on, the two are fixed, then one end of the main pipeline 1 is connected with the grouting equipment, the other end is placed at the preset crack sealing operation point, the angle of the main pipeline 1 is adjusted, the secondary pipeline 2 can be smoothly inserted into the crack, and the grouting pipe is inserted into the main pipeline 1, so that the end of the grouting pipe can pass through the butyl rubber block 7, the grouting pressure and flow are set through the touch screen interface of the intelligent control module, and the operation is started.

[0055] After the grouting equipment is started, the high-molecular anti-pressure flexible material enters the secondary pipeline 2 through the grouting pipe, and the high-molecular anti-pressure flexible material is injected into the crack through the slot 8 and the end of the secondary pipeline 2, the sensor group monitors the pressure, flow and temperature data in real time, and feeds back to the central processor.

[0056] After grouting for 30 minutes, no grout overflow is observed on the surface of the crack, the flow is stable at 0, and it is judged that the grout is full. The pressure is maintained for 5 minutes to ensure that the grout is fully dispersed, and then the grouting equipment is turned off.

[0057] After the pressure stabilizes, the intelligent control module detects that the material temperature rises to the solidification temperature, and automatically powers off the electromagnet 5, the operator separates the main pipeline 1 from the secondary pipeline 2, recycles the main pipeline 1 for repeated use, and completes the sealing operation. In the later period, the pressure inside the crack is monitored through the pressure sensor every week, and the pressure is stable for 1 month, indicating that the sealing is successful.

[0058] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for sealing fractures in a mine aquifer, characterized in that, Includes a main pipeline (1), which is placed at a pre-set mine aquifer fissure sealing operation point. One end of the main pipeline (1) is connected to a secondary pipeline (2), which is used to transport polymer compressive-resistant flexible material into the fissure. An expansion filling module, which performs sealing operations based on a self-expanding and filling mechanism upon contact with water; The expansion filling module includes a stainless steel collar (3) fixed on the outer surface of the secondary pipeline (2). The stainless steel collar (3) is filled with compacted water-swellable material (4). The water-swellable material (4) is selected from sodium polyacrylate bentonite. Its expansion ratio is adjusted by adding different proportions of polyvinyl alcohol crosslinking agent. The expansion time is controlled between 5 and 15 minutes.

2. The mine aquifer fracture sealing device according to claim 1, characterized in that, The tail end of the secondary pipeline (2) is inclined, with an inclination angle of 4° to 6°. The polymeric pressure-resistant flexible material is composed of a matrix phase, a filler phase, and a self-flow accelerator. The matrix phase is a flexible matrix material with good fluidity, filling properties, and water-swellable properties, selected from modified hydrogels, polyurethanes, acrylate polymers, or mixtures thereof. The viscosity of the matrix phase in the dry or uncured state is ≤500 mPa·s. The filler phase contains fine aggregates or nanofillers. The fine aggregates are selected from fine sand or fly ash, with a particle size range of 0.1 to 1.0 mm. The nanofillers are selected from nano-silica or nano-calcium carbonate, with a particle size ≤100 nm. The self-flow accelerator is a composite surfactant.

3. The mine aquifer fracture sealing device according to claim 1, characterized in that, The secondary pipeline (2) has a groove (6) on one end surface, and the longitudinal section of the groove (6) is J-shaped. A butyl rubber block (7) is fitted inside the groove (6), and an opening is provided at the center of the butyl rubber block (7).

4. The mine aquifer fracture sealing device according to claim 1, characterized in that, The main pipeline (1) is connected to the secondary pipeline (2) at one end with a funnel-shaped opening, and the main pipeline (1) is made of lightweight metal.

5. A mine aquifer fracture sealing device according to claim 4, characterized in that, An electromagnet (5) is provided on the outer surface of the secondary pipeline (2), and the outer surface of the electromagnet (5) is in contact with the horn-shaped opening surface of the main pipeline (1).

6. A mine aquifer fracture sealing device according to claim 2, characterized in that, The composite surfactant is obtained by compounding fatty alcohol polyoxyethylene ether and sodium alkylbenzene sulfonate in a mass ratio of 1:

1.

7. A mine aquifer fracture sealing device according to claim 1, characterized in that, Multiple sets of slots (8) are provided through the outer surface of the other end of the secondary pipeline (2).

8. A mine aquifer fracture sealing device according to claim 1, characterized in that, It also includes an intelligent control module, which has intelligent monitoring and regulation functions, used to collect data in real time and dynamically adjust operating parameters. The intelligent control module includes an external touch screen operation interface and a sensor group, which includes a pressure sensor, a flow sensor and a temperature sensor, used to monitor the slurry status in real time and feed the data back to the central processing unit.

9. A mine aquifer fracture sealing device according to claim 8, characterized in that, The intelligent control module is electrically connected to the electromagnet (5) and is used to disconnect the main pipeline (1) from the secondary pipeline (2) after the sealing is completed.

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