A gob area closing wall anti-toxic and harmful gas diffusion device and construction method

Abstract

The application discloses a kind of goaf closing wall prevents toxic and harmful gas dispersion device and construction method, it is included in the inside of goaf and is installed with sedimentation tank to the end of inclined bottom plate, the one side of the sedimentation tank is provided with recess one, and recess one is installed with U-shaped stainless steel pipe in the inside.The goaf closing wall prevents toxic and harmful gas dispersion device of the present application can trigger and send early warning signal when the port of U-shaped stainless steel pipe is exposed to water surface, and the water level alarm sensor, the gate valve is connected with monitoring substation by controller, for controlling water flow switch, can be enabled when the water level alarm sensor alarms through controller and monitoring substation, and the recess two of gate valve waterproof, ensure that the water amount in recess two is sufficient, avoid the problem that the sealing effect is not good due to the decrease of water amount in recess two.

Description

Technical Field

[0001] This invention relates to the field of mine goaf sealing wall technology, specifically to a device and construction method for preventing the escape of toxic and harmful gases from a goaf sealing wall. Background Technology

[0002] In underground mining operations, as the ore body is gradually extracted, goaf areas of varying shapes are formed. Their spatial distribution is directly related to the ore body's occurrence conditions and mining technology. For high-risk goaf areas, sealing walls are required for isolation. In addition, groundwater seepage and residual mine drainage may exist within the goaf areas, leading to the accumulation of a certain amount of water. Drainage holes must be included in the construction of the sealing walls for underground mine goaf areas. These drainage holes allow the accumulated water in the goaf areas to drain through pre-designed channels, preventing the continuous accumulation of water and the formation of high water pressure within the goaf areas.

[0003] However, in reality, toxic and harmful gases such as carbon monoxide and hydrogen sulfide often accumulate in goaf areas due to ore oxidation and decomposition of associated minerals. These toxic and harmful gases may escape from the drainage holes in the goaf sealing wall into the intermediate roadway. These gases may not only cause poisoning of underground workers, but also pollute the fresh airflow and interfere with the stability of the ventilation system. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device and construction method for preventing the escape of toxic and harmful gases from a goaf enclosure wall, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A device for preventing the escape of toxic and harmful gases from a goaf enclosure wall includes an inclined base plate installed inside the goaf. The inclined base plate has a sedimentation tank installed at one end. A first groove is provided on one side of the sedimentation tank, and a U-shaped stainless steel pipe is installed inside the first groove. A second groove is installed at the other end of the U-shaped stainless steel pipe. A concrete layer is provided between the first and second grooves. The enclosure wall is located inside the concrete layer. A water level alarm sensor is installed inside the second groove, and a protective sleeve is provided on top of the water level alarm sensor. A monitoring substation is installed at the end of the protective sleeve. A water supply pipe is located below the monitoring substation, and a water supply branch pipe is installed on one side of the water supply pipe. A gate valve is installed at the end of the water supply branch pipe.

[0006] Furthermore, a main horizontal tunnel is fixedly installed on one side of the monitoring and control substation, and a main horizontal tunnel drainage ditch is provided on one side of the bottom of the main horizontal tunnel.

[0007] Furthermore, a filter plate is installed on the top of the main horizontal tunnel drainage ditch, and the main horizontal tunnel drainage ditch is located inside the main horizontal tunnel on the side near the second groove.

[0008] Furthermore, a second sealing wall is installed on the outer side of the first sealing wall, and a gas detector is fixedly installed on one side of the second sealing wall.

[0009] Furthermore, the height of the first and second sealing walls is higher than that of the goaf, and the first and second sealing walls are 0.3m higher than the top and bottom plates of the goaf.

[0010] Furthermore, an auxiliary frame is provided at one end of the U-shaped stainless steel pipe, and a filter screen is installed inside the auxiliary frame. A one-way valve is installed on the top of the auxiliary frame, and an auxiliary component for secondary water diversion is fixedly installed on the top of the one-way valve by fixing bolts.

[0011] Furthermore, the auxiliary components include a top wall, a water pipe, an internal wall unit one, and an internal wall unit two, with the internal wall unit one located at the bottom of the top wall, the internal wall unit two installed on one side of the internal wall unit one, and a water pipe located inside the top wall.

[0012] Furthermore, a water inlet pipe is installed on the top of the one-way valve, a check valve is provided on one side of the bottom of the one-way valve, and an overflow pipe is installed at the end of the check valve.

[0013] Furthermore, a cleaning assembly for cleaning the U-shaped stainless steel tube is provided above the U-shaped stainless steel tube. The cleaning assembly includes a base plate, a rubber sleeve, a hydraulic rod, a top plate, a connecting rod, a fixing plate, and a rubber plunger. The outer surface of the base plate is provided with a rubber sleeve, and a hydraulic rod is installed in the middle of the rubber sleeve. The output end of the hydraulic rod is provided with a top plate, and the outer surface of the top plate is provided with a fixing plate. A rubber plunger is installed at the bottom of the fixing plate.

[0014] Furthermore, the construction method of this goaf enclosure wall to prevent the escape of toxic and harmful gases includes the following steps: Step 1: First, construct sealing wall 1 and sealing wall 2 between the goaf and the main horizontal roadway. The bottom of the sealing wall 1 and sealing wall 2 is constructed using a concrete layer. A gas detector is pre-installed between sealing wall 1 and sealing wall 2 to monitor the sealing performance of sealing wall 1 on the side closer to the goaf. Sealing wall 1 and sealing wall 2 are 0.3m higher than the top and bottom plates of the goaf to ensure that the goaf is isolated from the main horizontal roadway. On the left and right sides near sealing wall 1 and sealing wall 2, construct groove 1 and groove 2. The bottom of groove 1 and groove 2 are connected by U-shaped stainless steel pipes to form a communicating vessel. The ends of the U-shaped stainless steel pipes are sealed with sealing wall 1, sealing wall 2, groove 1, and groove 2 using a concrete layer. Step 2: A sedimentation tank is set up on the side of the goaf near the first closed wall. Through physical sedimentation, solid particles in the wastewater in the goaf gradually settle to the bottom of the tank under the action of gravity. The slope of the inclined bottom plate on the side of the goaf away from the first closed wall is controlled at 3%~5% to meet the drainage needs of the goaf. The water in the goaf can flow into the side of the sedimentation tank, that is, the area formed by the second internal wall and the sedimentation tank. After sedimentation, the water will overflow from the area formed by the second internal wall and the sedimentation tank to the area between the first and second internal walls. Then, the upper water after sedimentation will be introduced into the U-shaped stainless steel pipe in one direction through the overflow pipe and the check valve. The filter screen set on the top of the U-shaped stainless steel pipe can filter the introduced water to avoid the U-shaped stainless steel pipe from being blocked by water for a long time, thus reducing the frequency of blockage. The other end of the U-shaped stainless steel pipe is in the second groove, and the water level in the second groove is higher than the end of the U-shaped stainless steel pipe. At the same time, the overflowing water will flow into the main horizontal roadway drainage ditch set up in the main horizontal roadway. Step 3: A monitoring substation is installed on the wall of the main horizontal tunnel. The water level alarm sensor is connected to the monitoring substation via a cable. The cable is protected by a rubber sleeve. The water level alarm sensor is installed in the second groove and is flush with the upper end of the U-shaped stainless steel pipe. A water supply branch pipe is installed above the second groove and is directly connected to the water supply pipe in the main horizontal tunnel. A gate valve is installed on the water supply branch pipe. When the end of the U-shaped stainless steel pipe is exposed above the water surface, the water level alarm sensor is triggered and sends an early warning signal. The gate valve is connected to the monitoring substation through the controller and is used to control the water flow switch. When the water level alarm sensor alarms, the gate valve can be activated by the controller and the monitoring substation to prevent water from entering the second groove. This ensures that there is sufficient water in the second groove and avoids the problem of poor sealing effect caused by the decrease in water volume in the U-shaped stainless steel pipe due to the decrease in water volume in the second groove. Step four: The hydraulic rod can be controlled by the monitoring substation and controller. The hydraulic rod can drive the top plate, connecting rod, fixed plate and rubber plunger to move up or down. The rubber plunger will extend into the interior of the U-shaped stainless steel tube. By moving the rubber plunger up or down, the water in the U-shaped stainless steel tube can be continuously surging. When the water surges up, the foreign matter produced by the filter screen can be pushed into the water inlet pipe through the one-way valve. The backwash water will enter between the built-in wall and the sedimentation tank. The area between the built-in wall and the sedimentation tank can be used for secondary sedimentation of the backwash water. It is convenient to introduce the sedimented water back into the U-shaped stainless steel tube through the overflow pipe. The entire hydraulic rod is equipped with a rubber sleeve to protect it from the outside when the hydraulic rod extends or retracts.

[0015] Beneficial effects: 1. In this invention, the slope of the inclined bottom plate on the side of the goaf away from the first enclosure wall is controlled at 3%~5% to meet the drainage requirements of the goaf. The water accumulated in the goaf can flow into the sedimentation tank on one side, that is, the area formed by the second internal wall and the sedimentation tank. After sedimentation, the water will overflow from the area formed by the second internal wall and the sedimentation tank to the area between the first internal wall and the second internal wall. Then, the upper layer of water after sedimentation will be introduced into the U-shaped stainless steel pipe in one direction through the overflow pipe and the design of the check valve. The filter screen set on the top of the U-shaped stainless steel pipe can filter the introduced water, avoiding the rapid blockage of the U-shaped stainless steel pipe due to long-term water introduction, and reducing the frequency of blockage.

[0016] 2. This invention enables the water level alarm sensor to trigger and issue an early warning signal when the U-shaped stainless steel pipe port is exposed above the water surface. The gate valve is connected to the monitoring substation via the controller to control the water flow switch. When the water level alarm sensor alarms, the gate valve can be activated by the controller and the monitoring substation to ensure sufficient water in the second groove, thus avoiding the problem of poor sealing effect caused by the decrease in water volume in the U-shaped stainless steel pipe due to the decrease in water volume in the second groove.

[0017] 3. This invention, through the design of the cleaning components, enables the up-and-down movement of the rubber plunger to continuously agitate the water within the U-shaped stainless steel tube. As the water surges upwards, it pushes foreign matter filtered by the screen into the inlet pipe via a one-way valve, facilitating screen cleaning. Furthermore, the agitation of the water allows any sediment that may have settled within the U-shaped stainless steel tube to overflow to the outside. The backwash water then enters the area between the internal wall and the sedimentation tank, allowing for secondary sedimentation. This sedimented water is then reintroduced into the U-shaped stainless steel tube via an overflow pipe. Simultaneously, the invention maintains the airtightness of the U-shaped stainless steel tube during cleaning, preventing the release of toxic gases. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the device for preventing the escape of toxic and harmful gases from the goaf enclosure wall according to the present invention. Figure 2 This is a partial cross-sectional view of the device for preventing the escape of toxic and harmful gases from the goaf enclosure wall according to the present invention. Figure 3 This is a side view of the internal structure of the device for preventing the escape of toxic and harmful gases from the goaf enclosure wall according to the present invention. Figure 4 This is a schematic diagram of the mounting plate connection structure in the device for preventing the escape of toxic and harmful gases from the goaf enclosure wall of the present invention; Figure 5This is a schematic diagram of the auxiliary components in the goaf enclosure wall device for preventing the escape of toxic and harmful gases of the present invention; Figure 6 This is a schematic diagram of the unfolded structure of the one-way valve and auxiliary frame in the goaf enclosure wall anti-toxic and harmful gas emission device of the present invention. Figure 7 This is a schematic diagram showing the connection and distribution of monitoring and control substations in the goaf enclosure wall anti-toxic and harmful gas emission device of the present invention; Figure 8 This is a schematic diagram of the cleaning component in the goaf enclosure wall device for preventing the escape of toxic and harmful gases of the present invention.

[0019] In the diagram: 1. Goaf; 2. Main horizontal roadway; 3. Inclined floor slab; 4. Sedimentation tank; 5. Groove 1; 6. U-shaped stainless steel pipe; 7. Groove 2; 8. Sealing wall 1; 9. Gas detector; 10. Sealing wall 2; 11. Concrete layer; 12. Check valve; 13. Main horizontal roadway drainage ditch; 14. Auxiliary components; 1401. Top wall; 1402. Water pipe; 1403. Internal wall 1; 1404. Internal wall 2; 15. Mounting plate; 16. Single 17. Auxiliary frame; 18. Fixing bolt; 19. Filter screen; 20. Overflow pipe; 21. Water supply pipe; 22. Filter plate; 23. Monitoring and control substation; 24. Protective sleeve; 25. Water supply branch pipe; 26. Gate valve; 27. Water level alarm sensor; 28. Cleaning assembly; 2801. Base plate; 2802. Rubber sleeve; 2803. Hydraulic rod; 2804. Top plate; 2805. Connecting rod; 2806. Fixing plate; 2807. Rubber plunger. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0026] like Figures 1-7 As shown, the goaf enclosure wall device for preventing the escape of toxic and harmful gases provided by the present invention includes an inclined base plate 3 installed inside the goaf 1, and a sedimentation tank 4 installed at the end of the inclined base plate 3. A groove 5 is provided on one side of the sedimentation tank 4, and a U-shaped stainless steel pipe 6 is installed inside the groove 5. A groove 7 is installed at the other end of the U-shaped stainless steel pipe 6. A concrete layer 11 is provided between the groove 5 and the groove 7. An enclosure wall 8 is provided inside the concrete layer 11. An enclosure wall 10 is installed on one side of the enclosure wall 8, and a gas detector 9 is fixedly installed on one side of the enclosure wall 10.

[0027] In some embodiments, the height of sealing wall 1 8 and sealing wall 2 10 is higher than that of goaf 1, and sealing wall 1 8 and sealing wall 2 10 are 0.3m higher than the top and bottom plates of goaf 1.

[0028] Understandably, sealing wall 18 and sealing wall 20 are first constructed between goaf 1 and main roadway 2. The bottom is constructed using concrete layer 11. A gas detector 9 is pre-installed between sealing wall 18 and sealing wall 20 to monitor the sealing performance of sealing wall 18 on the side closer to goaf 1. Sealing wall 18 and sealing wall 20 are 0.3m higher than the top and bottom plates of goaf 1 to ensure that the goaf is isolated from the main roadway 2. Grooves 15 and 27 are constructed on the left and right sides near sealing wall 18 and sealing wall 20. The bottom of grooves 15 and 27 are connected by U-shaped stainless steel pipes 6 to form a communicating vessel. The ends of the U-shaped stainless steel pipes 6 are sealed with sealing wall 18, sealing wall 20, groove 15, and groove 27 using concrete layer 11.

[0029] A water level alarm sensor 27 is installed inside the recess 2 7, and a protective sleeve 24 is installed on the top of the water level alarm sensor 27. A monitoring substation 23 is installed at the end of the protective sleeve 24. A main level tunnel 2 is fixedly installed on one side of the monitoring substation 23, and a main level tunnel drainage ditch 13 is installed on one side of the bottom of the main level tunnel 2. A filter plate 22 is installed on the top of the main level tunnel drainage ditch 13. The main level tunnel drainage ditch 13 is located inside the main level tunnel 2, close to the recess 2 7. A water supply pipe 21 is installed below the monitoring substation 23, and a water supply branch pipe 25 is installed on one side of the water supply pipe 21. A gate valve 26 is installed at the end of the water supply branch pipe 25. The monitoring substation 23 is installed on the tunnel wall of the main level tunnel 2. The water level alarm sensor 27 is connected to the monitoring substation 23 through a cable. The external side of the cable is... A rubber protective sleeve 24 is used for protection. The water level alarm sensor 27 is installed in the second groove 7 and is flush with the upper end of the U-shaped stainless steel pipe 6. A water supply branch pipe 25 is installed above the second groove 7. The water supply branch pipe 25 is directly connected to the water supply pipe 21 in the main tunnel 2. A gate valve 26 is installed on the water supply branch pipe 25. When the end of the U-shaped stainless steel pipe 6 is exposed above the water surface, the water level alarm sensor 27 is triggered and sends an early warning signal. The gate valve 26 is connected to the monitoring substation 23 through the controller and is used to control the water flow switch. When the water level alarm sensor 27 alarms, the gate valve 26 can be activated by the controller and the monitoring substation 23 to release water into the second groove 7, ensuring that there is enough water in the second groove 7 and avoiding the problem of poor sealing effect caused by the decrease of water in the U-shaped stainless steel pipe 6 due to the decrease of water in the second groove 7.

[0030] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an auxiliary frame 17 is provided at one end of the U-shaped stainless steel pipe 6, and a filter screen 19 is installed inside the auxiliary frame 17. A one-way valve 16 is installed on the top of the auxiliary frame 17, and an auxiliary component 14 for secondary water intake is fixedly installed on the top of the one-way valve 16 by a fixing bolt 18.

[0031] In some embodiments, the auxiliary component 14 includes a top wall 1401, a water inlet pipe 1402, an internal wall first 1403, and an internal wall second 1404. The bottom of the top wall 1401 is provided with the internal wall first 1403, and the internal wall second 1404 is installed on one side of the internal wall first 1403. The water inlet pipe 1402 is provided inside the top wall 1401. The top of the one-way valve 16 is equipped with the water inlet pipe 1402, and a check valve 12 is provided on one side of the bottom of the one-way valve 16. An overflow pipe 20 is installed at the end of the check valve 12. A sedimentation tank 4 is provided in the goaf 1 near the side of the closed wall first 8. Through physical sedimentation, the solid particles in the wastewater in the goaf 4 gradually settle to the bottom of the tank under gravity. The slope of the inclined bottom plate 3 on the side of the goaf 1 away from the closed wall first 8 is controlled at 3%~5% to meet the drainage requirements of the goaf 1. For water demand, the accumulated water in the goaf 1 can flow by gravity into one side of the sedimentation tank 4, namely the area formed by the inner wall 1404 and the sedimentation tank 4. After sedimentation, the water will overflow from the area formed by the inner wall 1404 and the sedimentation tank 4 to the area between the inner wall 1403 and the inner wall 1404. Then, the upper layer of water after sedimentation will be introduced into the U-shaped stainless steel pipe 6 in one direction through the overflow pipe 20 and the check valve 12. The filter screen 19 set at the top of the U-shaped stainless steel pipe 6 can filter the introduced water to avoid the U-shaped stainless steel pipe 6 from being blocked by water for a long time, thus reducing the frequency of blockage. The other end of the U-shaped stainless steel pipe 6 is in the groove 7, and the water level in the groove 7 is higher than the end of the U-shaped stainless steel pipe 6. At the same time, the overflowing water will flow into the main horizontal tunnel drainage ditch 13 set in the main horizontal tunnel 2.

[0032] In some other embodiments, a cleaning assembly 28 for cleaning the U-shaped stainless steel tube 6 is provided above the U-shaped stainless steel tube 6, such as... Figure 7 and Figure 8 As shown.

[0033] Specifically, the cleaning component 28 includes a base plate 2801, a rubber sleeve 2802, a hydraulic rod 2803, a top plate 2804, a connecting rod 2805, a fixing plate 2806, and a rubber plunger 2807. The outer surface of the base plate 2801 is provided with a rubber sleeve 2802, and a hydraulic rod 2803 is installed in the middle of the rubber sleeve 2802. The output end of the hydraulic rod 2803 is provided with a top plate 2804, and the outer surface of the top plate 2804 is provided with a fixing plate 2806. The bottom of the fixing plate 2806 is provided with a rubber plunger 2807.

[0034] It should be noted that the operation of the hydraulic rod 2803 can be controlled by the monitoring substation 23 and the controller. The hydraulic rod 2803 can drive the top plate 2804, connecting rod 2805, fixed plate 2806 and rubber plunger 2807 to move up or down. The rubber plunger 2807 extends into the U-shaped stainless steel tube 6. By moving the rubber plunger 2807 up or down, the water in the U-shaped stainless steel tube 6 can be continuously agitated. When the agitated water surges upward, it can filter the filter screen 19. Foreign matter generated can be pushed into the water inlet pipe 1402 through the one-way valve 16. The backwash water will enter between the built-in wall 1403 and the sedimentation tank 4. The area between the built-in wall 1403 and the sedimentation tank 4 can be used to perform secondary sedimentation of the backwash water. It is convenient to introduce the sedimented water back into the U-shaped stainless steel pipe 6 through the overflow pipe 20. The entire hydraulic rod 2803 is equipped with a rubber sleeve 2802, which can protect the hydraulic rod 2803 from the outside when it extends and retracts.

[0035] Meanwhile, this application also provides a method for constructing the above-mentioned goaf sealing wall to prevent the escape of toxic and harmful gases, the method comprising the following steps: Step 1: First, construct sealing wall 18 and sealing wall 20 between goaf 1 and main roadway 2. The bottom of the sealing wall 18 and sealing wall 20 are constructed using concrete layer 11. Gas detector 9 is pre-installed between sealing wall 18 and sealing wall 20 to monitor the sealing performance of sealing wall 18 on the side closer to goaf 1. Sealing wall 18 and sealing wall 20 are 0.3m higher than the top and bottom of goaf 1 to ensure that the goaf is isolated from main roadway 2. On the left and right sides near sealing wall 18 and sealing wall 20, construct groove 15 and groove 27. The bottom of groove 15 and groove 27 are connected by U-shaped stainless steel pipe 6 to form a communicating vessel. The U-shaped stainless steel pipe 6 is sealed with sealing wall 18, sealing wall 20, groove 15, and groove 27 using concrete layer 11. Step 2: A sedimentation tank 4 is installed in the goaf 1 near the sealing wall 8. Through physical sedimentation, solid particles in the wastewater in the goaf gradually settle to the bottom of the tank under gravity. The slope of the bottom slab 3 on the side of the goaf 1 away from the sealing wall 8 is controlled at 3%~5% to meet the drainage requirements of the goaf 1. Accumulated water in the goaf 1 can flow by gravity into one side of the sedimentation tank 4, namely the area formed by the inner wall 1404 and the sedimentation tank 4. After sedimentation, the water overflows from the area formed by the inner wall 1404 and the sedimentation tank 4 to the inner wall 1403. Between the area between the inner wall 1404 and the sedimentation area, the upper water after sedimentation will be introduced into the U-shaped stainless steel pipe 6 through the overflow pipe 20 and the check valve 12. The filter screen 19 set on the top of the U-shaped stainless steel pipe 6 can filter the introduced water, avoid the U-shaped stainless steel pipe 6 from being blocked by water for a long time, and reduce the frequency of blockage. The other end of the U-shaped stainless steel pipe 6 is in the groove 7, and the water level in the groove 7 is higher than the end of the U-shaped stainless steel pipe 6. At the same time, the overflowing water will flow into the main horizontal tunnel drainage ditch 13 set in the main horizontal tunnel 2. Step 3: A monitoring substation 23 is installed on the wall of the main horizontal tunnel 2. A water level alarm sensor 27 is connected to the monitoring substation 23 via a cable. The cable is protected by a rubber protective sleeve 24. The water level alarm sensor 27 is installed in the second groove 7 and is flush with the upper end of the U-shaped stainless steel pipe 6. A water supply branch pipe 25 is installed above the second groove 7. The water supply branch pipe 25 is directly connected to the water supply pipe 21 in the main horizontal tunnel 2. A gate valve 26 is installed on the water supply branch pipe 25. When the end of the U-shaped stainless steel pipe 6 is exposed above the water surface, the water level alarm sensor 27 is triggered and sends an early warning signal. The gate valve 26 is connected to the monitoring substation 23 through the controller and is used to control the water flow switch. When the water level alarm sensor 27 alarms, the gate valve 26 can be activated by the controller and the monitoring substation 23 to release water into the second groove 7, ensuring sufficient water in the second groove 7 and avoiding the problem of poor sealing effect caused by the decrease in water in the U-shaped stainless steel pipe 6 due to the decrease in water in the second groove 7. Step four: The operation of the hydraulic rod 2803 can be controlled by the monitoring substation 23 and the controller. The hydraulic rod 2803 can drive the top plate 2804, connecting rod 2805, fixed plate 2806 and rubber plunger 2807 to move up or down. The rubber plunger 2807 will extend into the interior of the U-shaped stainless steel pipe 6. By moving the rubber plunger 2807 up or down, the water in the U-shaped stainless steel pipe 6 can be continuously surging. When the water surges up, the foreign matter filtered by the filter screen 19 can be pushed into the water inlet pipe 1402 through the one-way valve 16. The backwash water will enter between the built-in wall 1403 and the sedimentation tank 4. The area between the built-in wall 1403 and the sedimentation tank 4 can be used for secondary sedimentation of the backwash water. It is convenient to introduce the sedimented water back into the U-shaped stainless steel pipe 6 through the overflow pipe 20. The entire hydraulic rod 2803 is equipped with a rubber sleeve 2802, which can protect the hydraulic rod 2803 from the outside when it extends and retracts.

[0036] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A device for preventing the escape of toxic and harmful gases from a goaf enclosure wall, characterized in that: The system includes an inclined base plate (3) located inside the goaf (1), with a sedimentation tank (4) installed at one end of the inclined base plate (3). A first groove (5) is provided on one side of the sedimentation tank (4), and a U-shaped stainless steel pipe (6) is installed inside the first groove (5). A second groove (7) is installed at the other end of the U-shaped stainless steel pipe (6). A concrete layer (11) is provided between the first groove (5) and the second groove (7). A sealing wall (8) is located within the concrete layer (11). Inside the groove 2 (7), a water level alarm sensor (27) is installed, and a protective sleeve (24) is provided on the top of the water level alarm sensor (27). A monitoring and control substation (23) is installed at the end of the protective sleeve (24). A water supply pipe (21) is provided below the monitoring and control substation (23), and a water supply branch pipe (25) is installed on one side of the water supply pipe (21). A gate valve (26) is provided at the end of the water supply branch pipe (25). An auxiliary frame (17) is provided at one end of the U-shaped stainless steel pipe (6), and a filter screen (19) is installed inside the auxiliary frame (17). A one-way valve (16) is installed on the top of the auxiliary frame (17), and an auxiliary component (14) for secondary water intake is fixedly provided on the top of the one-way valve (16) by a fixing bolt (18). The auxiliary component (14) includes a top wall (1401), a water inlet pipe (1402), an internal wall first (1403) and an internal wall second (1404), and an internal wall first (1403) is provided at the bottom of the top wall (1401), an internal wall second (1404) is installed on one side of the internal wall first (1403), and a water inlet pipe (1402) is provided inside the top wall (1401); a water inlet pipe (1402) is installed at the top of the one-way valve (16), a check valve (12) is provided on one side of the bottom of the one-way valve (16), and an overflow pipe (20) is installed at the end of the check valve (12); A cleaning assembly (28) for cleaning the U-shaped stainless steel tube (6) is provided above the U-shaped stainless steel tube (6). The cleaning assembly (28) includes a base plate (2801), a rubber sleeve (2802), a hydraulic rod (2803), a top plate (2804), a connecting rod (2805), a fixing plate (2806), and a rubber plunger (2807). The outer surface of the base plate (2801) is provided with a rubber sleeve (2802), and a hydraulic rod (2803) is installed in the middle of the rubber sleeve (2802). The output end of the hydraulic rod (2803) is provided with a top plate (2804), and a fixing plate (2806) is provided on the outer surface of the top plate (2804). A rubber plunger (2807) is installed at the bottom of the fixing plate (2806).

2. The device for preventing the escape of toxic and harmful gases from a goaf enclosure wall according to claim 1, characterized in that: The monitoring and control substation (23) has a main horizontal lane (2) fixedly installed on one side, and a main horizontal lane drainage ditch (13) is set on one side of the bottom of the main horizontal lane (2).

3. The device for preventing the escape of toxic and harmful gases from a goaf enclosure wall according to claim 2, characterized in that: A filter plate (22) is installed on the top of the main horizontal tunnel drainage ditch (13), and the main horizontal tunnel drainage ditch (13) is located inside the main horizontal tunnel (2) on the side near the second groove (7).

4. The device for preventing the escape of toxic and harmful gases from a goaf enclosure wall according to claim 3, characterized in that: A second sealing wall (10) is installed on the outside side of the first sealing wall (8), and a gas detector (9) is fixedly installed on one side of the second sealing wall (10).

5. The device for preventing the escape of toxic and harmful gases from a goaf sealing wall according to claim 4, characterized in that: The height of the first sealing wall (8) and the second sealing wall (10) is higher than that of the goaf (1), and the first sealing wall (8) and the second sealing wall (10) are 0.3m higher than the top and bottom plates of the goaf (1).

6. A method for constructing a goaf enclosure wall to prevent the escape of toxic and harmful gases, applied to the goaf enclosure wall to prevent the escape of toxic and harmful gases as described in claim 5, characterized in that, The construction method includes the following steps: Step 1: Construct sealing wall 1 (8) and sealing wall 2 (10) between the goaf (1) and the main horizontal roadway (2), pour the bottom with a concrete layer (11), and pre-install a gas detector (9) between sealing wall 1 (8) and sealing wall 2 (10); Step 2: The sedimentation tank (4) uses physical sedimentation to allow solid particles in the wastewater in the empty area to gradually settle to the bottom of the tank under the action of gravity. The water in the empty area (1) flows into one side of the sedimentation tank (4) and is placed in the second groove (7) through the other end of the U-shaped stainless steel pipe (6). The water level in the second groove (7) is higher than the end of the U-shaped stainless steel pipe (6). At the same time, the overflowing water will flow into the main horizontal tunnel drainage ditch (13) set in the main horizontal tunnel (2). Step 3: When the U-shaped stainless steel pipe (6) is exposed above the water surface, the water level alarm sensor (27) is triggered and sends out an early warning signal. The gate valve (26) is connected to the monitoring substation (23) through the controller to control the water flow switch. When the water level alarm sensor (27) alarms, the gate valve (26) is activated through the controller and the monitoring substation (23) to waterproof and enter the groove two (7). Step 4: Use the area between the built-in wall 1 (1403) and the sedimentation tank (4) to perform secondary sedimentation of the backwash water, so that the sedimented water can be introduced back into the U-shaped stainless steel pipe (6) through the overflow pipe (20).

Images