A coal mine tunnel water inrush full-section blocking device and its working method

Abstract

The present invention relates to the field of mining engineering technology, and in particular to a full-section plugging device for water gushing in a coal mine tunnel and its working method. The plugging device comprises: a plugging roll and a plugging layer; the plugging roll comprises a transmission shaft and a mesh fence, the transmission shaft is mounted on the top of the tunnel, and the mesh fence is wound on the transmission shaft; the plugging layer comprises a plurality of independent water-absorbing film bags, the water-absorbing film bags are arranged on the water-facing side of the plugging roll, and each water-absorbing film bag is filled with water-swelling material. The portion where the plugging layer fits the tunnel is elastic cloth, the inside of the plugging layer is non-elastic cloth, the front side is water-permeable cloth, and the back side is waterproof cloth. The present invention improves the safety of coal mining and reduces the disasters caused by water gushing.

Description

Technical Field

[0001] The present invention relates to the technical field of mining engineering, and in particular to a full-section blocking device for water inrush in a coal mine tunnel and a working method thereof. Background Art

[0002] In the field of mining engineering, especially in the process of coal mining, safety issues have always been the focus of the industry. Inside the mine, especially in the various working faces under mining, sudden water inrush from the coal mine working face has become a key factor restricting production and endangering life. In most cases, a sudden water inrush from a certain working face is usually accompanied by mud and sand. If this working face is not dealt with in a timely manner, it will cause damage to the remaining working faces and the entire main tunnel of the coal mine, threatening the lives of workers and causing economic losses. The treatment of working faces facing sudden water and mud mainly includes the following problems:

[0003] Water and mud inrush typically occur quickly, requiring only a short time to reach the main tunnels from a specific working face. Existing coal mine water inrush prevention and control measures generally include two types: waterproof gates and flood control sandbags. Existing waterproof gates are typically hydraulically activated, resulting in slow activation and a high failure rate. Furthermore, when mud and sand are present in the water flow, the gates cannot close properly. Sandbags are often placed at the joints, but these can only handle small amounts of surface water. They are not only ineffective in controlling large-scale water inrush, but also pose a threat to workers' lives. Waterproof gates are a top priority in coal mine water inrush prevention and control. When a coal mine water inrush occurs, it typically originates from either the floor or roof. Waterproof gates have a fixed shape, and if the floor or roof undergoes severe deformation, they risk failure. Additionally, existing devices exist for blocking gases, dust, and other pollutants. However, these devices lack sufficient strength to effectively block water inrush at 2 MPa or above, and are easily damaged by fine sand and gravel, rendering the entire device useless. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide a full-section water gushing blocking device for coal mine tunnels and a working method thereof, aiming to improve the safety of coal mining and reduce the disasters caused by water gushing.

[0005] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A full-section sealing device for water inrush in a coal mine tunnel, comprising: a sealing roll and a sealing layer; the sealing roll comprises a drive shaft and a mesh fence, the drive shaft is mounted on the top of the tunnel, and the mesh fence is wound around the drive shaft; the sealing layer comprises a plurality of independent absorbent film bags, the absorbent film bags are arranged on the water-facing side of the sealing roll, each absorbent film bag is filled with water-swelling material, the sealing layer is made of elastic cloth at the position where it fits the tunnel, the inside of the sealing layer is made of inelastic cloth, the front side is made of permeable cloth, and the back side is made of waterproof cloth.

[0007] An embodiment of the present invention also provides a working method of the full-section sealing device for water gushing in a coal mine tunnel as described above, including: when water gushing occurs on the working face, the transmission shaft rotates, the sealing roll and the sealing layer attached thereto begin to fall, and the water-absorbing film bag on the water-facing surface begins to absorb water and expand after encountering water. As the amount of water increases and the water level becomes higher, the water-absorbing film bag gradually absorbs water and expands until the sealing layer is completely flexible and fits the bottom, both sides and top of the tunnel to form a full-section sealing body to achieve water gushing.

[0008] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0009] 1. This plugging device responds quickly to sudden water inrush. Its material expands rapidly upon contact with water, quickly forming a high-strength, large-scale plugging connector. This seals large-section underground water inrush exceeding 2 MPa while also supporting the tunnel's load. Even with high water flow rates or high water pressures, the device can reliably withstand the pressure of the water flow, ensuring the plugging effect is intact and preventing subsequent dangers such as tunnel collapse, thereby achieving both water blocking and load-bearing properties. The installation process is simple and efficient, meeting project requirements.

[0010] 2. Due to the small particle size of polyacrylate-based absorbent resin materials, there is a possibility of water leakage and permeability under certain pressure. Therefore, the absorbent film bag is arranged in a grid pattern, with the water-facing side composed of highly permeable non-woven fabric and the water-receiving side composed of impermeable geotextile to prevent material leakage through the gaps. The material has high expansion properties. To fully utilize this expansion property, the film bag that adheres to the inner wall of the tunnel is made of highly elastic fabric (polyester high-elastic fabric). Due to the high expansion of the internal material, the film bag can flexibly conform to the surrounding inner wall of the tunnel. Based on the functional expression of each part of the fabric, the expandable absorbent film bag realizes a water-permeable water-facing side, expansion around the surrounding area, and water-proofing on the water-receiving side, allowing the expandable film bag to expand adaptively to the deformed inner wall of the tunnel.

[0011] Additional advantages of the present invention will be given in the description which follows, and in part will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. In addition, the spacing or size between parts is exaggerated to show the position of each part, and the schematic diagram is for illustrative purposes only.

[0013] Figure 1 This is a schematic diagram of the plugging device provided by an embodiment of the present invention in a rolled-up state;

[0014] Figure 2 is a schematic diagram of a blocking layer provided by an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the expanded state of the plugging roll provided by an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of a transmission shaft and a bayonet provided by an embodiment of the present invention from a first perspective;

[0017] Figure 5 is a schematic diagram of a transmission shaft and a bayonet provided by an embodiment of the present invention from a second perspective;

[0018] Figure 6 This is a schematic diagram of the arrangement position of the blocking device provided in an embodiment of the present invention;

[0019] Figure 7 is a schematic diagram of the arrangement of multiple blocking devices provided by an embodiment of the present invention;

[0020] Figure 8 This is a schematic diagram of the blocking state of multiple blocking devices provided by an embodiment of the present invention;

[0021] Figure 9 This is a front view of the packaging device provided by an embodiment of the present invention in a blocked state;

[0022] Figure: 1. Sealing roll; 11. Drive shaft; 12. Mesh fence; 13. Cross brace; 14. Counterweight bar; 2. Sealing layer; 21. Water-absorbing film bag; 211. Water-blocking fabric; 212. Water-permeable fabric; 213. Inelastic fabric; 214. Elastic fabric; 22. Water-swelling material; 3. Laneway; 31. Track groove; 32. Bottom groove; 4. Drive mechanism; 41. Detent pin; DETAILED DESCRIPTION

[0023] It should be noted that the following detailed description is illustrative and is intended to further illustrate the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] As introduced in the background technology, at present, the prevention and control of water inrush in coal mines mainly relies on waterproof gates and flood control sandbags. Waterproof gates are usually hydraulically activated, with slow startup speed, high failure rate, and difficulty in working normally in complex environments with mud and sand. Although flood control sandbags are low in cost, they cannot effectively prevent and control water inrush in large quantities, and there are safety hazards. These existing technologies have problems such as slow response speed, poor blocking effect, and low safety when dealing with sudden water inrush. In order to solve the above technical problems, this embodiment proposes a full-section blocking device for water inrush in coal mine tunnels, which can achieve rapid response and efficient blocking, and improve the safety of coal mining. Through the combination of a mechanical transmission device and a water-absorbing membrane bag, the device can quickly block water inrush when it occurs, reduce the impact of water inrush on the coal mine working face, protect the lives of miners, and reduce economic losses.

[0025] Example 1

[0026] like Figure 1 、 Figure 2 As shown, the full-section sealing device for water inrush in a coal mine tunnel includes a sealing roll 1 and a sealing layer 2; the sealing roll 1 includes a transmission shaft 11 and a mesh fence 12, the transmission shaft 11 is installed on the top of the tunnel 3, and the mesh fence 12 is wound on the transmission shaft 11; the sealing layer 2 includes a plurality of independent water-absorbing film bags 21, and the water-absorbing film bags 21 are arranged on the water-facing side of the sealing roll 1, and each water-absorbing film bag 21 is filled with water-swellable material 22, the position where the sealing layer 2 is attached to the tunnel 3 is an elastic cloth 214, the inside of the sealing layer 2 is a non-elastic cloth 213, the front side is a water-permeable cloth 212, and the back side is a waterproof cloth 211.

[0027] The sealing roll 1, consisting of a drive shaft 11 and a mesh fence 12, is installed at the top of the tunnel 3. The drive shaft 11 provides support and transmission, and its structural design ensures the stability and reliability of the device. The mesh fence 12 is wound around the drive shaft 11 and rolled up to form a deployable sealing structure. In the event of a sudden flood, the mesh fence 12 can quickly drop down to form a full-section shield, effectively blocking the inrushing water.

[0028] The sealing layer 2 is composed of a plurality of independent water-absorbing film bags 21, which are arranged on the water-facing side of the sealing roll 1. The portion of the sealing layer 2 that fits the tunnel 3 uses elastic cloth 214, which can flexibly adapt to the shape changes in the tunnel 3 and achieve effective sealing. The front side uses permeable cloth 212 to ensure that water can quickly enter the film bag, and the back side uses waterproof cloth 211 to effectively prevent moisture from overflowing through the back of the film bag. Each water-absorbing film bag 21 is filled with water-swellable material 22, such as polyacrylate water-absorbing resin material. These materials can expand rapidly after contact with water to form a dense sealing body to prevent water leakage and flow. The overall design of the device fully takes into account the actual working conditions of the coal mine tunnel 3, and can provide fast and reliable protection in emergency situations, effectively improving the safety of mining operations.

[0029] Considering the drawback of polyacrylate-based water-absorbing resin materials, which experience significant water loss under pressure after absorbing water, the absorbent membrane bags 21 are arranged in a grid pattern, with each grid filled with a certain mass of water-swelling material 22. This absorbent membrane bag 21 offsets the effects of excessive gravity on the water absorption of the underlying material after absorbing most of the water, significantly improving the overall water absorption rate. Furthermore, considering that water absorption within the internal material will compress the other grid spaces, affecting water absorption efficiency, inelastic fabric 213 (thick inelastic geotextile) is used between the mesh structures. On the one hand, when the water-swelling material within absorbs water, it props up the central absorbent membrane bag 21, filling the entire internal cavity of the sealing layer 2 and thus supporting the outer absorbent membrane bags. Together with the outermost elastic fabric 214, this achieves complete cross-sectional sealing. Furthermore, the swelling of the central absorbent membrane bag 21 upon absorbing water strengthens the waterproof fabric 211, improving the stability and safety of the sealing.

[0030] like Figure 3 As shown, the mesh fence 12 includes a cross brace 13 and a counterweight bar 14. There are multiple cross braces 13, and the multiple cross braces 13 are arranged in parallel in the vertical direction. The counterweight bar 14 is parallel to the cross brace 13 and is located on the bottom side of the mesh fence 12. Track grooves 31 are provided on both sides of the lane 3, and a bottom groove 32 is provided at the bottom of the lane 3. The bottom groove 32 and the track groove 31 are located in the same plane. The two ends of the cross brace 13 are embedded in the track groove 31, and the counterweight bar 14 can be embedded in the bottom groove 32.

[0031] The cross braces 13 and counterweights 14 increase the stability and load-bearing capacity of the entire structure, enhancing impact resistance. The track grooves 31 and bottom grooves 32 on both sides of the tunnel 3 are coplanar, facilitating the smooth lowering of the sealing roll 1. The ends of the cross braces 13 fit into the track grooves 31, ensuring smooth movement of the sealing device along the designated track during activation. The counterweights 14 can be inserted into the bottom grooves 32, further enhancing the device's stability and stability.

[0032] The plugging device is composed of a mesh steel grid with a diameter of 5mm and a horizontal steel counterweight at the bottom. The mesh steel grid is rolled onto the central transmission shaft 11. In a direction parallel to the transmission shaft 11, a number of steel cross braces 13 are welded on the plugging roll 1 in accordance with the height of the tunnel 3. A rectangular counterweight is welded to the bottom of the mesh steel grid to fit into the bottom groove 32. The length of the mesh steel grid, cross braces 13, and steel rectangular counterweight is at least 50 cm greater than the width of the tunnel 3, depending on the width of the tunnel 3. Before the plugging roll 1 is installed, a groove of at least 25 cm deep and 5 cm wide is dug inward on all sides of the inner wall of the tunnel 3. The specific size depends on the width of the tunnel 3, so that both sides of the plugging roll 1 are stuck in the groove during the falling process, ensuring that in the event of water gushing, all parts of the device can fully cover the entire cross-section of the tunnel 3, thereby achieving full-section plugging. The top device is pre-installed with expansion screws, the steel cross braces 13 on both sides are inserted into the track grooves 31 on both sides of the tunnel 3, and the bottom cross steel is inserted into the bottom groove 32. When facing sudden water and mud, a full-section steel support net can be quickly formed to form a reverse force to resist water pressure.

[0033] like Figure 4 、 Figure 5 As shown, the blocking device further includes a drive mechanism 4, which includes an electromagnet and a latch 41. The latch 41 can be raised and lowered vertically under the action of the electromagnet. A latch groove is provided on the outer periphery of the transmission shaft 11. The electromagnet can attract the latch 41, causing it to rise and latch into the latch groove of the transmission shaft 11 for locking. This design effectively controls the activation timing of the blocking roll 1, determining when to release the latch 41 through the electromagnet's attraction.

[0034] When the electronic switch is turned on, the electromagnet is de-energized, the latch 41 loses its grip, the drive shaft 11 rotates freely, and the sealing roll 1 begins to fall, quickly sealing the entire cross-section. This design enables automated operation, reduces manual intervention, and improves the speed and efficiency of the sealing process. The technical benefit of this drive mechanism 4 is that it enhances the safety and reliability of the device, ensuring that the sealing task can be completed quickly and effectively in an emergency, thereby reducing the threat posed by flooding to the tunnel 3 and workers.

[0035] The absorbent film bag 21 has an appearance of a rectangular parallelepiped, and its interior is divided into a mesh structure by an inelastic, non-stretchable thick geotextile. The elastic cloth 214 is a polyester elastic cloth 214, which has good elasticity and flexibility, and can effectively adapt to the shape changes of the inner wall of the tunnel 3, ensuring that the film bag can fit tightly. The inelastic cloth 213 is a geotextile, and its high strength and wear resistance can enhance the overall structural strength of the film bag. The permeable cloth 212 is a non-woven fabric with excellent water permeability, which can quickly guide water flow into the absorbent film bag 21, ensuring that the material can absorb water in the shortest time and achieve a rapid sealing effect. The waterproof cloth 211 is also a geotextile, and its impermeable performance ensures that water will not leak from the back side of the film bag, increasing the effectiveness of the sealing. Through the design of this material combination, the overall performance of the sealing layer 2 is significantly improved, allowing the device to maintain an efficient sealing effect under extreme conditions and reduce the impact of water flow on the safety of the tunnel 3.

[0036] The water-swelling material 22 is a polyacrylic acid salt water-absorbing resin. This material can rapidly expand 200-250 times after contacting water, and its reaction time only takes 10 seconds to 1 minute, which greatly improves the response speed and blocking effect of the device under water gushing conditions. The rapid response of the water-swelling material 22 can form a preliminary protection at the moment when the water flow begins to flow in, and in the subsequent expansion process, gradually achieve full-section blocking, thereby effectively slowing down the intrusion speed of water and gaining valuable time for the implementation of other prevention and control measures. After absorbing water, the polyacrylic acid salt water-absorbing resin has good flexibility and adaptability, and can form a tight seal on the wall of the laneway 3 to prevent water leakage. At the same time, the stability of the material under high pressure is also greatly enhanced, ensuring that under sudden strong water gushing conditions, an effective blocking effect can still be maintained.

[0037] like Figure 6 As shown, the blocking device is installed in tunnel 3 of the mining face connected to the main road. This location was chosen based on an analysis of water inrush risks in actual operations. The main road is typically the primary access route in a coal mine, and the mining face is a high-risk area for water inrush. Placing the blocking device in this location allows for timely response to water inrush incidents, preventing them from spreading to other tunnels 3. The placement of the blocking device should take into account the structure of tunnel 3 and the direction of water flow, ensuring that it is immediately effective in the event of a water inrush.

[0038] This device is installed on the top of the tunnel 3. Before installation, the top of the tunnel 3 is pre-grooved. This device is installed inside the groove and does not affect the space of the tunnel 3. When water gushes on the working face, the water gusher rapid sealing device is quickly activated by the electric gate. The bag can be physically and quickly dropped down by the gravity of the material inside the device and the bottom counterweight bar 14, and stuck into the pre-dug groove at the bottom. It is not affected by the bottom water flow and mud and cannot be activated. The expandable water-absorbing film bag 21 attached to the sealing roll 1 quickly absorbs water and expands to form a sealing body after encountering water. Due to the high water absorption rate of the material, the material has a certain degree of expansion after absorbing water, and can flexibly fit the inner wall of the tunnel 3, ignoring the deformation of the inner wall of the tunnel 3.

[0039] In another preferred embodiment, multiple blocking devices can be arranged in sequence along the flow direction of the gushing water. This arrangement can form layers of protection, such as Figure 7 、 Figure 8 As shown, the overall sealing effect is enhanced. Each sealing device is rationally configured based on the water velocity and flow rate, ensuring that each device performs its function in the optimal position. The coordinated operation of multiple devices can maintain the overall sealing state under the multiple impacts of the water flow, further reducing the possibility of water infiltration and improving the safety and operational stability of Laneway 3.

[0040] Example 2

[0041] This embodiment proposes a working method of the full-section water inrush blocking device for a coal mine tunnel in Example 1, including:

[0042] The grooves are designed by hollowing out the top and both sides of the pre-installed part of the tunnel 3. The width of the top groove should be at least 50 cm greater than the width of the tunnel 3, which depends on the width of the tunnel 3. The space of the top groove depends on the height of the tunnel 3. The higher the tunnel 3 is, the larger the volume of the roll is, and the larger the top groove space is. The inner wall of the tunnel 3 is at least 25 cm deep and 5 cm wide. The specific size depends on the width of the tunnel 3, so that the two sides of the plugging roll 1 are stuck in the groove during the falling process to form sufficient reverse support force. The depth of the grooves on both sides of the tunnel 3 depends on the width of the tunnel 3. The wider the width of the tunnel 3, the deeper the groove is, and the bottom counterweight is stuck to form the bottom support force. The overall groove reference ratio is: groove space volume (m 3 ): Tunnel 3 height (m): Tunnel 3 width (m) = 1:4:1; the width of the grooves on both sides is fixed at 5 cm.

[0043] After the groove is processed, the full-section water-gushing blocking device for the coal mine tunnel is installed and fixed at the top groove, and the two sides of the device are inserted into the track groove 31 to ensure that the device can fall along this direction when it is started; the bayonet 41 of the transmission shaft 11 on both sides of the device is bound to the electromagnet and then connected to the electric control switch, and the switch is installed at the connection between the main road and the tunnel 3.

[0044] When coal mine management personnel discover water gushing from the working face, they immediately notify the staff to evacuate, and turn on the electrical control switch of the device after the staff have completely evacuated.

[0045] After the device's electric control switch is turned on, the electromagnet on the side of the drive shaft 11 is de-energized, the latch 41 disengages from the slot of the drive shaft 11, and the drive shaft 11 rotates freely. The device's sealing roll 1 and the water-absorbing film bag 21 attached thereto begin to fall under the action of the bottom counterweight horizontal steel module. During the falling process of the sealing roll 1, both sides slide down along the pre-dug grooves. The sealing roll 1 forms a steel fence protection, and the bottom of the water-absorbing film bag 21 facing the water begins to absorb water and expand after encountering water. As the amount of water increases and the water level rises, the water-absorbing film bag 21 gradually absorbs water and expands until the main body of the device is completely flexible and fits the top of the tunnel 3, forming a full-section sealing body (such as Figure 9 As shown) to block the water gushing.

[0046] After draining all the water in the working face through grouting, drainage and other means, the device can be removed and a new coal mine tunnel water-gushing full-section blocking device can be reinstalled on the top to prevent water from gushing from the working face.

[0047] In the above process, the design contents need to be determined according to the height of the construction section tunnel 3, including: the volume of the top groove space, the depth of the vertical grooves on both sides of the tunnel 3, the height of the main module of the device, and the volume of the filling material used in the device.

[0048] The pre-installed tunnel section 3 should be comprehensively analyzed through local geological and hydrogeological data, and after an engineering safety assessment from the aspects of geological structure, rock lithology, topography and groundwater, trenching, installation and other construction should be carried out to avoid disasters such as underground landslides.

[0049] This plugging method is not only highly effective but also adaptable to varying water inflow conditions, ensuring a gradually increasing plugging effect as the water level rises. This progressive plugging strategy allows the device to maintain its plugging effectiveness even in the face of large-scale water inflows, preventing the failure of the plugging layer 2 due to excessive water pressure, thereby ensuring safe coal mine operations.

[0050] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A full-section water-gushing blocking device for coal mine tunnels, characterized in that: include: Sealing rolls and sealing layers; The blocking roll includes a transmission shaft and a mesh fence, wherein the transmission shaft is mounted on the top of the tunnel and the mesh fence is wound on the transmission shaft; The blocking layer includes a plurality of independent water-absorbing film bags, which are arranged on the water-facing side of the blocking roll. Each water-absorbing film bag is filled with water-swelling material. The blocking layer is formed of elastic cloth at the position where it contacts the tunnel. The front side of the blocking layer is made of water-permeable cloth, and the back side is made of water-insulating cloth. The water-absorbing film bag has a rectangular appearance and is divided into a mesh structure by non-elastic cloth inside. The mesh fence includes cross braces and counterweight bars. There are multiple cross braces, which are arranged in parallel in the vertical direction. The counterweight bars are parallel to the cross braces and are located on the bottom side of the mesh fence. Track grooves are provided on both sides of the lane, and a bottom groove is provided at the bottom of the lane. The bottom groove and the track groove are located in the same plane. The two ends of the cross braces are embedded in the track grooves, and the counterweight bars can be embedded in the bottom grooves.

2. The full-section water gushing blocking device for coal mine tunnels according to claim 1, characterized in that: The transverse width of the mesh fence, the length of the cross brace and the length of the counterweight bar are all at least 50 centimeters greater than the width of the lane.

3. The full-section water gushing blocking device for coal mine tunnels according to claim 1, characterized in that: The blocking device also includes a driving mechanism, which includes an electromagnet and a latch. The latch can be lifted and lowered in a vertical direction. A latch groove is provided on the outer periphery of the transmission shaft. The electromagnet can absorb the latch to lift it up and latch it in the latch groove of the transmission shaft.

4. The full-section plugging device for water inrush in coal mine tunnels according to claim 1, characterized in that: The elastic cloth is polyester elastic cloth, the non-elastic cloth is geotextile, the water-permeable cloth is non-woven cloth, and the waterproof cloth is geotextile.

5. The full-section plugging device for water inrush in coal mine tunnels according to claim 1, characterized in that: The water-swelling material is a polyacrylate water-absorbing resin material.

6. The full-section plugging device for water inrush in coal mine tunnels according to claim 2, characterized in that: The water-swellable material swells 200-250 times when exposed to water, and the reaction time is 10 seconds to 1 minute.

7. The full-section water gushing blocking device for coal mine tunnels according to claim 1, characterized in that: The blocking device is arranged at a tunnel of a mining working face connected to a main road.

8. The full-section water gushing blocking device for coal mine tunnels according to claim 7, characterized in that: A plurality of blocking devices are sequentially arranged along the flow direction of the gushing water.

9. A method for operating the full-section plugging device for water inrush in a coal mine tunnel according to any one of claims 1 to 8, characterized in that: include: When water gushes out of the working face, the transmission shaft rotates, the sealing roll and the sealing layer attached to it begin to fall, and the water-absorbing film bag on the water-facing side begins to absorb water and expand after encountering water. As the amount of water increases and the water level rises, the water-absorbing film bag gradually absorbs water and expands until the sealing layer is completely flexible and fits the bottom, both sides and top of the tunnel to form a full-section sealing body to block the water gushing.

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