Tunnel working face sudden water permeation blocking device

Abstract

The utility model relates to a roadway working face sudden water permeation blocking device which comprises a shell, an air bag, an inflation device and a monitoring device. The shell is fixedly arranged on a machine body of the coal mining heading machine; one part of the air bag is fixed in the shell, and the other part of the air bag expands under the inflation effect of the inflation device and is attached to the inner wall of the roadway. The inflating device is arranged in the shell, and an air outlet of the inflating device is connected with an air inlet of the air bag; the monitoring device comprises an electromagnetic flow meter arranged on an excavator bucket of the coal mining heading machine, and the electromagnetic flow meter monitors the water flow in the roadway and is connected with the air inflation device through a data transmission line. When sudden water permeation happens to the working face of the roadway, water flow passes through the electromagnetic flow meter, the electromagnetic flow meter monitors the water flow in the roadway in real time and transmits the water flow in the roadway to the electronic controller, and when the water flow reaches a threshold value, the electronic controller triggers the heating circuit to start operation and then triggers the air bag to inflate and expand to complete water flow interception, so that accurate mastering of the roadway water permeation time is achieved; and a blocking wall is formed in time to protect the safety of personnel and equipment.

Description

Technical Field

[0001] This utility model relates to the field of safety prevention and control technology in coal mines, and in particular to a device for blocking sudden water inrush in roadway working faces. Background Technology

[0002] Water inrush is one of the five major hazards in coal mines. When a water inrush accident occurs underground, it can lead to a series of extremely serious consequences.

[0003] First, a large amount of water rushes into the underground working area instantly. The powerful impact of the water flow can knock miners down and sweep them away, causing injury or even death. During the sweeping process, miners are highly likely to collide with the mine walls, equipment, and other objects, resulting in serious injuries. Simultaneously, miners may not have time to evacuate and may be trapped by the water, facing a significant risk of drowning. If the water flow is rapid and the water level rises quickly, trapped personnel could be submerged within a short period.

[0004] Secondly, water seepage can damage the ventilation system, making the air underground more polluted and reducing oxygen levels. The influx of water also occupies space underground, compressing the space for air and posing a risk of oxygen deprivation and suffocation to trapped personnel.

[0005] Furthermore, water inrush can cause short circuits and burnouts in underground electrical equipment, leading to power system failure. This not only affects the operation of critical equipment such as ventilation and drainage but may also trigger secondary disasters such as fires and explosions. Mining and transportation equipment may be damaged or buried under the impact of water inrush. This equipment is expensive, and damage to it will cause huge economic losses to coal mining companies. The powerful water flow may also twist and deform underground tracks, rupture pipes, and seriously affect the normal operation of transportation and drainage systems. A large amount of water rushing into the mine will exert enormous pressure on the surrounding rock of the roadway, potentially causing roadway collapse. Roadway collapse will further hinder personnel evacuation and rescue operations, while also damaging the integrity of ventilation and drainage systems. In addition, water inrush may block ventilation ducts, damage ventilation facilities, and prevent the underground ventilation system from operating normally. Poor ventilation will lead to the accumulation of harmful gases such as methane, greatly increasing the danger of underground operations. If the water inrush exceeds the design capacity of the drainage system, the drainage pump may be damaged due to overload, and the drainage pipes may be blocked, causing the drainage system to fail. This will cause the water level in the well to continue to rise, exacerbating the disaster.

[0006] Although mine water inrush can have serious consequences, the current common approach is to predict the time, location, or probability of a water inrush accident in advance. There is no corresponding emergency water blocking device that can immediately block the water flow when a water inrush accident occurs, thus buying time for workers to escape. Utility Model Content

[0007] To address the problems existing in the prior art and avoid casualties and property losses caused by sudden water inrush accidents, this utility model provides a device for blocking sudden water inrush at a roadway working face, specifically including the following technical solutions.

[0008] A device for blocking sudden water inrush at a roadway working face includes a shell, an airbag, an inflation device, and a monitoring device. The shell is fixedly mounted on the body of a coal mining tunneling machine. A portion of the airbag is fixed inside the shell, and the other portion expands and adheres to the inner wall of the roadway under the inflation action of the inflation device. The inflation device is located inside the shell, and its outlet is connected to the air inlet of the airbag. The monitoring device includes an electromagnetic flowmeter mounted on the bucket of the coal mining tunneling machine, which monitors the water flow in the roadway and is connected to the inflation device via a data transmission line.

[0009] Furthermore, the housing includes an airbag mounting part and a base; the airbag mounting part is hollow inside and used to install the airbag; the base is fitted and installed at a set position on the coal mining tunneling machine.

[0010] Furthermore, at least one side of the airbag mounting part is a movable detachable surface; the number of the housings is set to multiple, and the multiple housings form an integral baffle with adjacent sides fitting together on the body of the coal mining tunneling machine.

[0011] Furthermore, when not in use, the airbags are stacked in a fan shape inside the airbag mounting section; the airbags include a first airbag section and a second airbag section, the first airbag section is fixedly installed inside the airbag mounting section, and the end face of the second airbag section is tightly fitted to the inner wall of the tunnel after it is fully inflated; after being fully inflated and deployed, the adjacent sides of the adjacent second airbag sections are pressed together.

[0012] Furthermore, it also includes an airbag fixing device, which includes a folding bracket, one end of which is fixed to the inner wall of the airbag mounting part, and the other end is fixed to the surface of the airbag.

[0013] Furthermore, the airbag fixing device also includes a resistance plate, which is fixed to the surface of the airbag and fixedly connected to one end of the folding bracket; the edge of the resistance plate is provided with tooth-shaped protrusions.

[0014] Furthermore, the inflation device includes a gas generator, a lithium battery, and an electronic controller; the gas generator is filled with guanidine nitrate and has a section of heating wire embedded inside; the heating wire is connected to the lithium battery via a wire to form a heating circuit; the electronic controller controls the opening and closing of the heating circuit; the gas outlet of the gas generator is fixedly connected to the air inlet of the airbag.

[0015] Furthermore, the gas generator is configured with three charge chambers: an upper charge chamber, a middle charge chamber, and a lower charge chamber. Heating wires are connected in series and run through the three charge chambers. The upper and lower charge chambers are equipped with gas outlet mechanisms, which include a section of rubber tube and an elastic steel wire disposed inside the rubber tube. The elastic steel wire is coiled in the non-working state and straightens in the working state to drive the rubber tube to inflate the airbag.

[0016] Furthermore, a triangular piece is provided at the free end of the elastic steel wire; in the inflated state, the rubber tube tilts upward in the upper loading chamber and downward in the lower loading chamber.

[0017] Furthermore, the monitoring device also includes a camera and an alarm, which are connected to an electronic controller via a signal transmission line; the camera is used to monitor water inrush accidents in the tunnel, and the alarm is used to issue audible and visual warnings simultaneously with the water inrush accident.

[0018] Based on the above technical solution, this utility model has the following beneficial effects:

[0019] This utility model describes a device for blocking sudden water seepage in a tunnel working face. When sudden water seepage occurs during tunnel excavation, the water flows through an electromagnetic flowmeter, which monitors the flow rate in real time and transmits it to an electronic controller. When the water flow triggers a threshold set by the electronic controller, the controller activates the heating circuit of the inflation device, which in turn inflates the airbag to block the water flow. This process allows for accurate timing of water seepage in the tunnel, promptly forming a blocking wall within the tunnel and protecting personnel and equipment safety.

[0020] This invention features a shell mounted on the body of a coal mining tunneling machine. This shell, in conjunction with an airbag, allows the airbag to remain securely inside the shell in its non-inflated state, without affecting production operations. In the event of a water inrush, the airbag, while securely inside the shell, rapidly expands and presses against the inner wall of the tunnel, forming an effective blocking wall. Multiple shells are provided; if one shell is damaged, it can be replaced promptly to continue its blocking function, making it economical and durable.

[0021] This invention comprises two parts of different shapes for the airbag. One part fits snugly within the shell, while the other part is flexibly designed to fit various tunnel shapes, making it suitable for different tunnels and possessing good versatility. The airbag is made of durable rubber and nylon materials, making it easy to fold, wear-resistant, and highly elastic. The folding bracket and resistance plate enhance the airbag's mechanical strength, enabling it to better withstand the impact of hard objects during water seepage in the tunnel and ensuring the airbag effectively blocks water.

[0022] This invention features a gas generator with three charge chambers sharing a common heating wire, ensuring simultaneous triggering of the explosive charge. The elastic gas outlet tube, composed of a flexible steel wire and rubber tubing, is coiled when the gasbag is not inflated. Upon the explosion of guanidine nitrate, the impact force straightens it, causing the gas to curve upwards or downwards, resulting in a uniform distribution of the gas impact direction and maintaining consistent expansion speed of the gasbag both laterally and longitudinally. Sharp iron triangular plates at the free end of the flexible steel wire in the elastic gas outlet tube prevent the generation of gas eddies, thus preventing high-pressure airflow from altering the gas flow direction. Attached Figure Description

[0023] Figure 1 : Schematic diagram of the overall structure of the blocking device;

[0024] Figure 2 : Schematic diagram of the installation of the blocking device on the coal mining tunneling machine;

[0025] Figure 3 : Schematic diagram of the assembly structure of the shell and airbag;

[0026] Figure 4 : Schematic diagram of the disassembled structure of the shell and airbag assembly;

[0027] Figure 5 Schematic diagram of airbag structure;

[0028] Figure 6 Schematic diagram of gas generator structure;

[0029] Figure 7 : A cross-sectional schematic diagram of the shell and airbag installed on the body of the coal mining tunneling machine.

[0030] Symbol Explanation

[0031] 101-Airbag mounting part, 102-Base, 103-Modible detachable surface;

[0032] 201-First airbag section, 202-Second airbag section, 203-Vent hole, 204-Folding bracket, 205-Resistance plate, 206-Teeth-shaped protrusion, 207-September;

[0033] 301-Gas generator, 302-Flame-retardant and explosion-proof box installation chamber, 303-Upper charging chamber, 304-Middle charging chamber, 305-Lower charging chamber, 306-Elastic steel wire, 307-Rubber hose, 308-Iron triangle plate, 309-Straight-through gas outlet, 310-Electronic controller;

[0034] 401-Electromagnetic flowmeter, 402-Explosion-proof network camera, 403-Alarm. Detailed Implementation

[0035] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. Therefore, this specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains.

[0036] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 The present invention will be described in detail by way of embodiments.

[0037] This embodiment describes a device for blocking sudden water seepage in a roadway working face, including a shell 1, an airbag, an inflation device, and a monitoring device.

[0038] The housing 1 includes an airbag mounting part 101 and a base 102.

[0039] The airbag mounting section 101 is trapezoidal in shape and hollow inside, and is used to install the airbag.

[0040] The end face of the base 102 is provided with an arc-shaped surface, that is, the opposite surface of the base 102 and the body of the coal mining tunneling machine is provided with an arc-shaped surface, which is used to fit the housing 102 to the set position of the coal mining tunneling machine.

[0041] The shell 102 is made of engineering plastics, such as ABS plastic and PP plastic, which are lightweight while having high mechanical strength, and also have the advantages of simple molding and easy processing.

[0042] The housing 102 is manufactured using a one-piece molding process, such as injection molding. However, at least one side of the airbag mounting part 101 is a movable detachable surface 103, meaning that this side can be pulled out and detached to facilitate the installation, removal, folding, and other operations of the airbag within the airbag mounting part 101. Figure 4 The movable disassembly surface 103 of the airbag mounting part 101 is shown. The movable disassembly surface 103 can be made to push and pull with the housing 1 by, for example, opening a protrusion along the edge of the disassembly surface and opening a groove on the mating surface of the housing 1 opposite to it, or by using other commonly used panel movable mounting methods. The mating structure between the movable disassembly surface 103 and the housing 1 will not be described in detail in this embodiment.

[0043] The number of housings 1 is set to multiple. After the multiple housings 1 are installed on the body of the coal mining tunneling machine, they can form an integral baffle with adjacent sides fitting together. Figure 7A schematic diagram of the overall structure of the housing 1 after installation is provided. As a preferred embodiment, the arc angle θ of the base 102 of the housing 1 can be set to 90°, and the base 102 of the housing 1 can be fixed to the body of the coal mining tunneling machine by bolts.

[0044] The airbag includes a first airbag portion 201 and a second airbag portion 202, which are integrally formed. When the airbag is fully inflated and deployed, the volume of the second airbag portion 202 is larger than that of the first airbag portion 201. The first airbag portion 201 is configured as a trapezoid or rectangular shape that mates with the airbag mounting portion 101 of the housing 1, and is firmly embedded in the airbag mounting portion 101 after inflation. The end face of the second airbag portion 202, that is, the end face opposite to the inner wall of the tunnel, is matched and set according to the shape of the tunnel to achieve the effect of the end face of the second airbag portion 202 being tightly fitted to the inner wall of the tunnel after inflation, for example, it is configured as a rectangular surface, an arc surface, etc.

[0045] The opposite end faces of the first airbag part 201 and the airbag mounting part 101 are firmly bonded together using adhesives such as epoxy resin, polyurethane, and silicone rubber. Figure 4 A schematic diagram of the bonding area is shown.

[0046] In the unused state, the airbags are stacked in a fan shape within the airbag mounting section 101 of the housing 1. When inflated and expanded, the first airbag section 201 is stably embedded within the airbag mounting section 101, and the second airbag section 202 expands outward until its end face adheres to the roadway wall. Since the housing 1 is arranged circumferentially along the body of the coal mining machine, and the second airbag section 202 is designed to be large, the adjacent edges of the multiple expanded second airbag sections 202 press against each other, forming a sealed barrier wall at the roadway cross-section. Therefore, the expanded dimensions of the second airbag section 202 are designed such that, after expansion, the adjacent edges of the second airbag sections 202 installed along the axial outer wall of the coal mining machine press against each other.

[0047] To further secure the airbags and effectively protect them from damage by foreign objects such as coal and gangue, and to ensure the pressure resistance of the blocking wall formed by the inflated airbags, thereby enhancing its ability to block water flow and preventing water from easily leaking out from the contact surfaces of adjacent airbags, the blocking device described in this embodiment also includes an airbag fixing device. Since the airbags in this device do not need to completely seal off the roadway after inflation, but rather provide workers with time to escape and avoid water accumulation that could damage the equipment, a small amount of water can be allowed to pass through the blocking wall.

[0048] As a preferred approach, the airbag is designed with a double-layer structure. The inner layer is made of rubber or plastic to achieve high airtightness, while the outer layer is made of nylon to achieve strong pressure resistance and resistance to tearing.

[0049] As a preferred method, the surface of the airbag is also provided with a vent hole 203. After the water blocking operation is completed and the water flow is cleared and dispersed, the gas inside the airbag is discharged through the vent hole 203 to release the airbag from its inflated state. Then the airbag is folded back into a fan shape and put back into the airbag mounting part 101 of the shell for the next use.

[0050] The airbag fixing device includes a folding bracket 204 and a resistance plate 205. The folding bracket 204 is made of lightweight and high-strength aluminum alloy. In its fully compressed state, its length is less than the depth of the airbag mounting part 101; in its fully extended state, its length is greater than the overall length of the airbag. One end of the folding bracket 204 is fixed to the bottom surface of the airbag mounting part 101 by screws or other means; the other end is fixed to the resistance plate by screws or other means. The resistance plate is made of engineering plastics such as ABS plastic or PP plastic and is firmly bonded to the designated position of the airbag using adhesives such as epoxy resin, polyurethane, or silicone rubber. When the airbag inflates, the folding bracket 204 extends outward synchronously with the airbag, forming an airbag protective wall.

[0051] As a preferred embodiment, the edge of the resistance plate 205 is provided with toothed protrusions 206. The toothed protrusions 206 can adapt to the uneven surface of the inner wall of the tunnel, increase the frictional resistance between the airbag and the tunnel surface, and further keep the airbag and the tunnel relatively fixed.

[0052] As a preferred embodiment, the airbag fixing device also includes a partition 207. When the airbag is not in operation, the partition 207 is snapped into the opening of the airbag mounting part 101, located outside the resistance plate 205. The partition 207 and the opening of the airbag mounting part 101 are fitted together by embedding. Due to the thrust generated by the airbag's compression on the inside, only a protruding retaining strip is needed at the opening of the airbag mounting part 101 to achieve stable installation of the partition 207. As a commonly used structure, this structure will not be described in detail here. The partition 207 is made of a thin plastic elastic plate, such as a 3-5mm ABS plate. When the airbag is not inflated, it can prevent dust and other substances from entering the shell 1 and corroding the internal devices. When workers pass in front of the tunneling machine, it can prevent the toothed protrusions 206 on the edge of the resistance plate 205 from accidentally injuring them. When inflated, the airbag can easily pop the partition 207 open without affecting the normal inflation operation of the airbag.

[0053] The inflation device includes a gas generator 301, a lithium battery, and an electronic controller 310 (ECU).

[0054] The gas generator 301, lithium battery, and electronic controller 310 are encapsulated inside a flame-retardant and explosion-proof box. The flame-retardant and explosion-proof box is installed at the base 102 of the housing 1. That is, the base 102 is pre-reserved with a flame-retardant and explosion-proof box installation chamber 302 during manufacturing, as shown in the attached figure. Figure 7 As shown.

[0055] The gas generator 301 is filled with guanidine nitrate and has a section of heating wire embedded inside; the heating wire is connected to a lithium battery through a wire to form a heating circuit; the electronic controller 310 controls the opening and closing of the heating circuit.

[0056] The outlet of the gas generator 301 is fixedly and sealed to the inlet of the airbag, for example, by means of bolt connection, clamp connection, or heat fusion connection, to prevent the two from falling off and disconnecting during inflation. When the electronic controller 310 receives an external operation signal and activates the heating circuit, the heating wire heats the guanidine nitrate, causing the guanidine nitrate to explode and instantly generate a large amount of high-pressure gas. The high-pressure gas rushes in and fills the airbag, causing the airbag to expand outward and tightly press against the inner wall of the tunnel to form a blocking wall.

[0057] As a preferred embodiment, the gas generator 301 is configured with three charge chambers: an upper charge chamber 303, a middle charge chamber 304, and a lower charge chamber 305. All three charge chambers share a heating wire, which is encapsulated and extends through all three chambers. The middle charge chamber 304 is connected to the air inlet of the airbag via a straight-through outlet 309. The upper charge chamber 303 and the lower charge chamber 305 are equipped with air outlet structures. This embodiment will use the air outlet structure of the upper charge chamber 303 as an example for explanation.

[0058] The gas outlet mechanism is configured as a flexible gas outlet tube, which includes a section of flexible steel wire 306 and a rubber tube 307 fixedly connected to the flexible steel wire 306, i.e., a section of flexible steel wire 306 is fixedly installed on the inner wall of the rubber tube 307. The flexible steel wire 306 is normally coiled, i.e., the flexible gas outlet tube is coiled; after the guanidine nitrate explodes in the explosive compartment, the gas impact causes the flexible steel wire 306 to straighten, and the flexible gas outlet tube extends into the air inlet of the airbag to inflate it.

[0059] This embodiment does not limit the shape of the elastic vent tube, but it is configured such that when the elastic vent tube is in the straightened inflation state, the elastic vent tube of the upper charge chamber 303 tilts upward and the elastic vent tube of the lower charge chamber 305 tilts downward, so that the impact direction of the gas is evenly distributed and the expansion speed of the airbag is consistent in the lateral and longitudinal directions.

[0060] Preferably, the free end of the elastic steel wire 306 of the elastic outlet pipe is provided with a sharp iron triangle 308. The sharp edges of the iron triangle 308 can prevent the gas from generating eddies and prevent the high-pressure airflow from generating eddies that change the flow direction of the gas.

[0061] Electronic control units (ECUs), as important electronic product components, are widely used in electronic manufacturing. Their core is a microcomputer system based on a microcontroller, playing a vital role in people's daily lives. An ECU is a miniaturized computer management center. It takes signal or data acquisition, calculation, processing, analysis, judgment, and decision-making as input, and outputs control commands to direct actuators. Sometimes, it also provides stable power or reference voltage to sensors. This embodiment does not modify the structure or operating principle of the ECU; a commercially available ECU can be used. Before use, the corresponding control parameters should be adjusted according to the operational requirements to process sensor input signals and control the on / off state of the heating circuit. These are standard operations for those skilled in the art and do not require overcoming technical difficulties. Therefore, this embodiment will not elaborate on the structure and operating principle of the ECU.

[0062] The monitoring device includes an electromagnetic flowmeter 401, which is installed on at least one of the inner and outer sides of the front end of the tunneling machine bucket. Preferably, it is installed at multiple locations on the tunneling machine bucket. The specific installation location can be determined by the operator according to the requirements, which will not be described in detail in this embodiment.

[0063] The electromagnetic flowmeter 401 is connected to the electronic controller via a signal line, and the data it monitors is transmitted to the electronic controller 310 in real time. This embodiment does not improve the commonly used connection method between the electromagnetic flowmeter 401 and the electronic controller 310, nor does it improve their operating principle or control structure. This embodiment only sets a water flow threshold in the electronic controller 310 to accurately control the timing of the heating circuit's activation. For example, the water flow threshold can be set to 5m³ / h. 3 / min.

[0064] To further accurately monitor water seepage in the roadway and prevent misjudgments by the electromagnetic flowmeter 401 due to objective factors such as the working environment, the monitoring device described in this embodiment also includes an explosion-proof network camera 402. The explosion-proof network camera 402 is installed above the body of the coal mining tunneling machine and further installed behind the housing 1, where "behind the housing 1" refers to the direction opposite to the direction of travel of the coal mining tunneling machine. Therefore, the installation of the explosion-proof network camera 402 is an optimization of the monitoring device described in this embodiment. Those skilled in the art can selectively use it according to operational needs when implementing the technical solution described in this embodiment.

[0065] The explosion-proof network camera 402 is connected to the electronic controller 310 via a signal transmission line. When water seepage occurs in the tunnel, it can quickly identify the seepage and transmit a seepage signal to the electronic controller 310. The electronic controller 310 is equipped with a dual trigger mechanism, meaning that the seepage signal and the water flow threshold monitored by the electromagnetic flowmeter 401 jointly trigger the heating circuit to open. Camera-based flow velocity measurement, as an advanced non-contact speed measurement technology, is widely used in traffic monitoring, water conservancy monitoring, and other fields. Its core lies in using a camera to capture the movement trajectory of a target object and processing the image data through specific algorithms to calculate the flow velocity. Typically, radar speed measurement is combined with camera or video monitoring technology. A brief description of the principle of radar speed measurement combined with a camera: The radar speed meter measures the distance and speed of a target object by emitting microwave signals and receiving the reflected signals. The camera is used to capture images of the target object. The combination of the two can achieve more accurate speed measurement and speed measurement evidence recording. A brief description of video monitoring technology: Video monitoring technology adds speed measurement algorithms to the camera to monitor the speed of foreign objects in the water flow passing through the camera. When the speed of the target object exceeds the set threshold, the system will automatically capture images or video clips. It has the advantages of wide monitoring range, good real-time performance, and convenient management. It is particularly suitable for scenarios such as urban expressways, highways, and water conservancy monitoring.

[0066] As a preferred embodiment, the explosion-proof network camera 402 is mounted on the body of the coal mining machine via a telescopic bracket, which is mounted on a rotating base, enabling further monitoring of the working face in front of the roadway at different angles and heights.

[0067] Preferably, the monitoring device is also equipped with an alarm 403, which has a buzzer and a flashing light, and is connected to the electronic controller 310 via a signal line. The alarm 403 is triggered when the electronic controller 310 starts the gas generator 301.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A roadway face sudden water inrush blocking device, characterized in that, comprising a shell, an air bag, an inflation device, a monitoring device; the shell is fixedly arranged on the machine body of a coal mining machine; one part of the air bag is fixed inside the shell, and the other part is inflated under the inflation of the inflation device and adheres to the inner wall of the roadway; the inflation device is arranged inside the shell, and the gas outlet thereof is connected with the gas inlet of the air bag; the monitoring device comprises an electromagnetic flowmeter arranged on a digging bucket of the coal mining machine, the electromagnetic flowmeter monitors the water flow in the roadway, and is connected with the inflation device through a data transmission line.

2. The roadway face sudden water inrush blocking device according to claim 1, characterized in that, the shell comprises an air bag mounting portion and a base; the air bag mounting portion is hollow inside and used for mounting the air bag; the base is adhered and mounted at a set position of the coal mining machine; at least one side surface of the air bag mounting portion is an activity dismounting surface; the number of the shell is set to be multiple, and the multiple shells form an integral baffle plate which is adjacent and adhered to each other on the machine body of the coal mining machine.

4. The roadway face sudden water inrush blocking device according to claim 3, characterized in that, the air bag is folded and stacked in a fan shape in the air bag mounting portion in an unused state; the air bag comprises a first air bag portion and a second air bag portion, the first air bag portion is fixedly arranged in the air bag mounting portion, and the second air bag portion is tightly adhered to the inner wall of the roadway after being completely inflated; after being completely inflated and unfolded, the adjacent edges of the adjacent second air bag portions are pressed and adhered to each other.

5. The roadway face sudden water inrush blocking device according to claim 2, characterized in that, further comprising an air bag fixing device, the air bag fixing device comprises a folding support, one end of the folding support is fixed to the inner wall of the air bag mounting portion, and the other end is fixed to the surface of the air bag.

6. The roadway face sudden water inrush blocking device according to claim 5, characterized in that, the air bag fixing device further comprises a resistance plate, the resistance plate is fixed to the surface of the air bag and fixedly connected with one end of the folding support; the edge of the resistance plate is provided with a toothed protrusion.

7. The roadway face sudden water inrush blocking device according to claim 2, characterized in that, the inflation device comprises a gas generator, a lithium battery and an electronic controller; the gas generator is filled with guanidine nitrate and embedded with an electric heating wire; the electric heating wire is connected with the lithium battery through a wire to form a heating circuit; the electronic controller controls the opening and closing of the heating circuit; the gas outlet of the gas generator is fixedly connected with the gas inlet of the air bag.

8. The roadway face sudden water inrush blocking device according to claim 7, characterized in that, the cavity of the gas generator is provided with three charge compartments, namely an upper charge compartment, a middle charge compartment and a lower charge compartment, and the electric heating wire is arranged in series and penetrates through the three charge compartments; the upper charge compartment and the lower charge compartment are provided with a gas outlet mechanism, the gas outlet mechanism comprises a section of rubber tube and an elastic steel wire arranged inside the rubber tube; the elastic steel wire is in a curled state in a non-working state and is stretched to drive the rubber tube to inflate the air bag in a working state. ​ ​ ​ 3. The device according to claim 2, characterized in that, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. The roadway face water inrush blocking device according to claim 8, characterized in that the free end of the elastic steel wire is provided with a triangular piece; in the inflated state, the rubber tube is curved upward at the upper charge cabin and curved downward at the lower charge cabin.

10. The roadway face water inrush blocking device according to claim 1, characterized in that the monitoring device further comprises a camera and an alarm, and the camera and the alarm are connected with the electronic controller through a signal transmission line; the camera is used to monitor the water inrush accident in the roadway, and the alarm is used to synchronously issue an audible and light warning with the water inrush accident. ​ ​

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