Poisonous and harmful gas dissipation prevention device for goaf sealing wall and construction method of poisonous and harmful gas dissipation prevention device

Abstract

The invention discloses a goaf sealing wall poisonous and harmful gas dissipation prevention device and a construction method. The goaf sealing wall poisonous and harmful gas dissipation prevention device comprises an inclined bottom plate arranged in a goaf, a sedimentation tank is installed at the end of the inclined bottom plate, a first groove is formed in one side of the sedimentation tank, and a U-shaped stainless steel pipe is installed in the first groove. According to the goaf sealing wall toxic and harmful gas dissipation prevention device, when the end opening of the U-shaped stainless steel pipe is exposed out of the water surface, the water level alarm sensor is triggered and sends out an early warning signal, and the gate valve is connected with the monitoring substation through the controller and used for controlling the water flow switch; when a water level alarm sensor gives an alarm, a gate valve can be started through a controller and a monitoring substation to prevent water from entering a second groove, it is ensured that water in the second groove is sufficient, and the problem that the water in the second groove is reduced, so that the water in a U-shaped stainless steel pipe is reduced, and the sealing effect is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine goaf closure wall, in particular to a goaf closure wall toxic and harmful gas escaping prevention device and construction method. BACKGROUND

[0002] In underground mining activities, as the ore body is gradually mined out, various forms of goaf will be formed, and its spatial distribution is directly related to the occurrence conditions of the ore body and the mining process. For high-risk goaf, a closure wall is needed for isolation. In addition, there may be underground water infiltration, mine drainage residue and other situations in the goaf, which will accumulate a certain amount of water. In the construction of the goaf closure wall of the underground mine, a drainage hole is needed to be left, which can make the accumulated water in the goaf discharge through the pre-set channel, avoiding the continuous accumulation of water in the goaf and forming a large water pressure.

[0003] However, from the actual situation of the mine, carbon monoxide, hydrogen sulfide and other toxic and harmful gases may accumulate in the goaf due to ore oxidation, associated mineral decomposition and other reasons. The toxic and harmful gases may escape from the drainage hole of the goaf closure wall into the middle section roadway, which not only may cause poisoning of underground workers, but also may pollute the fresh air flow and interfere with the stability of the ventilation system. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a goaf closure wall toxic and harmful gas escaping prevention device and construction method, which solves the problems raised in the background art.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: A goaf closure wall toxic and harmful gas escaping prevention device, comprising an inclined bottom plate arranged in the interior of the goaf, wherein the interior of the goaf is provided with the inclined bottom plate, and the end of the inclined bottom plate is provided with a sedimentation tank, one side of the sedimentation tank is provided with a groove one, and the interior of the groove one is provided with a U-shaped stainless steel pipe, the other end of the U-shaped stainless steel pipe is provided with a groove two, a concrete layer is arranged between the groove one and the groove two, a closure wall one is arranged in the interior of the concrete layer, a water level alarm sensor is arranged in the interior of the groove two, and a protective sleeve is arranged on the top of the water level alarm sensor, a monitoring and control substation is arranged at the end of the protective sleeve, a water supply pipe is arranged below the monitoring and control substation, a water supply branch pipe is arranged on one side of the water supply pipe, and a gate valve is arranged at the end of the water supply branch pipe.

[0006] Further, a main flat roadway is fixedly arranged on one side of the monitoring and control substation, and a main flat roadway drainage ditch is arranged on one side of the bottom of the main flat roadway.

[0007] Further, the top of the main drift drainage ditch is provided with a filter plate, and the main drift drainage ditch is located inside the main drift and close to one side of the second groove.

[0008] Further, the outer side of the first closed wall is provided with a second closed wall, and one side of the second closed wall is fixedly provided with a gas detector.

[0009] Further, the height of the first closed wall and the second closed wall is higher than the goaf, and the first closed wall and the second closed wall are 0.3m higher than the top and floor of the goaf.

[0010] Further, one end of the U-shaped stainless steel pipe is provided with an auxiliary frame, the inside of the auxiliary frame is provided with a filter screen, the top of the auxiliary frame is provided with a one-way valve, and the top of the one-way valve is fixedly provided with an auxiliary assembly for secondary water diversion through fixing bolts.

[0011] Further, the auxiliary assembly comprises a top wall, a water diversion pipe, an inner wall body one and an inner wall body two, the bottom of the top wall is provided with the inner wall body one, one side of the inner wall body one is provided with the inner wall body two, and the inside of the top wall is provided with the water diversion pipe.

[0012] Further, the top of the one-way valve is provided with a water diversion pipe, one side of the bottom of the one-way valve is provided with a check valve, and the end of the check valve is provided with an overflow pipe.

[0013] Further, the top of the one-way valve is provided with a water diversion pipe, one side of the bottom of the one-way valve is provided with a check valve, and the end of the check valve is provided with an overflow pipe.

[0014] Further, the construction method of the goaf closed wall device for preventing toxic and harmful gas from escaping comprises the following steps, Step one, first build the first closed wall and the second closed wall between the goaf and the main drift, use the concrete layer to pour at the bottom, and pre-install a gas detector between the first closed wall and the second closed wall, which is used to monitor the sealing performance of the first closed wall close to the goaf side, the first closed wall and the second closed wall are 0.3m higher than the top and floor of the goaf, which ensures that the goaf is isolated from the main drift, and the first groove and the second groove are built near the first closed wall and the second closed wall on the left and right sides, the bottom of the first groove and the second groove is connected by the U-shaped stainless steel pipe end to form a communication device, and the U-shaped stainless steel pipe end, the first closed wall, the second closed wall, the first groove and the second groove are poured densely by the concrete layer; Step two, a sedimentation tank is arranged in the goaf close to the side of the sealing wall, the sedimentation tank is used for gradually settling the solid particles in the wastewater in the goaf to the bottom of the tank under the action of gravity through physical sedimentation, the slope of the inclined floor far from the sealing wall of the goaf is controlled to be 3% to 5%, the drainage demand of the goaf is met, the accumulated water in the goaf can flow into the side of the inside of the sedimentation tank, that is, the area composed of the built-in wall two and the sedimentation tank, the water after sedimentation can overflow from the area composed of the built-in wall two and the sedimentation tank to the area between the built-in wall one and the built-in wall two, then the upper water after sedimentation can be introduced into the U-shaped stainless steel pipe in one direction through the design of the overflow pipe and the check valve, the water introduced can be filtered through the filter screen arranged at the top of the U-shaped stainless steel pipe, so as to avoid the internal rapid blockage of the U-shaped stainless steel pipe caused by long-time water introduction, reduce the blockage frequency, the other end of the U-shaped stainless steel pipe is located in the groove two, the water level in the groove two is higher than the end of the U-shaped stainless steel pipe, and the overflow accumulated water flows into the main roadway drainage ditch arranged in the main roadway; Step three, the monitoring and control substation is arranged on the roadway wall of the main roadway, the water level alarm sensor is connected with the monitoring and control substation through the cable, the outside of the cable is protected by the rubber protective sleeve, the water level alarm sensor is arranged in the groove two and flush with the upper port of the U-shaped stainless steel pipe, the water supply branch pipe is arranged above the groove two, the water supply branch pipe is directly communicated with the water supply pipe in the main roadway, the gate valve is installed on the water supply branch pipe, when the port of the U-shaped stainless steel pipe is exposed from the water surface, the water level alarm sensor triggers and sends a warning signal, the gate valve is connected with the monitoring and control substation through the controller and is used for controlling the water flow switch, so that when the water level alarm sensor alarms, the gate valve can be started by the controller and the monitoring and control substation to prevent water in the groove two, so as to ensure that the water amount in the groove two is sufficient and avoid the problem that the poor sealing effect is caused by the decrease of the water amount in the groove two and the decrease of the water amount in the U-shaped stainless steel pipe; Step four, the hydraulic rod can be controlled to operate through the monitoring and control substation and the controller, the hydraulic rod can drive the top disc, the connecting rod, the fixed plate and the rubber to move up or down, the rubber will extend into the inside of the U-shaped stainless steel pipe, the water in the U-shaped stainless steel pipe can be continuously surged by moving the rubber up or down, the foreign matters filtered by the filter screen when the water surges up can be pushed into the water pipe through the one-way valve, the backwashing water will enter between the built-in wall one and the sedimentation tank, the area between the built-in wall one and the sedimentation tank is used for secondary sedimentation of the backwashing water, the water after sedimentation can be introduced into the U-shaped stainless steel pipe again through the overflow pipe, and the outside of the whole hydraulic rod is provided with a rubber sleeve, so as to protect the hydraulic rod from the outside when the hydraulic rod stretches out or retracts.

[0015] Advantages: 1. In the present application, the slope of the inclined floor away from the closed wall on one side is controlled at 3%~5%, which meets the drainage needs of the goaf, the accumulated water in the goaf can flow into the side of the internal wall two and the sedimentation tank, and the water after sedimentation will overflow from the area composed of the internal wall two and the sedimentation tank to the area between the internal wall one and the internal wall two, and then the upper water after sedimentation will be introduced to the U-shaped stainless steel pipe in one direction through the overflow pipe and the check valve design, and the filter screen provided at the top of the U-shaped stainless steel pipe can filter the introduced water, avoiding the internal rapid blockage of the U-shaped stainless steel pipe caused by long-time water diversion, and reducing the blockage frequency.

[0016] 2. When the port of the U-shaped stainless steel pipe is exposed to the water surface, the water level alarm sensor triggers and sends a warning signal, the gate valve is connected with the monitoring substation through the controller, which is used for controlling the water flow switch, and when the water level alarm sensor alarms, the gate valve in the water-proof and groove two is started through the controller and the monitoring substation, so as to ensure that the water amount in the groove two is sufficient, and avoid the problem that the poor sealing effect is caused by the decrease of the water amount in the groove two and the decrease of the water amount in the U-shaped stainless steel pipe.

[0017] 3. Through the design of the cleaning assembly, the up or down movement of the rubber paddle can make the water in the U-shaped stainless steel pipe surge, and the foreign matters generated by the filter screen during the surging of the water can be pushed into the water diversion pipe through the one-way valve, so that the filter screen can be cleaned, and the foreign matters that may be deposited in the U-shaped stainless steel pipe can be overflowed to the outside of the U-shaped stainless steel pipe through the surging of the water, the backwashing water will enter between the internal wall one and the sedimentation tank, the area between the internal wall one and the sedimentation tank can be used for secondary sedimentation of the backwashing water, the water after sedimentation can be introduced into the U-shaped stainless steel pipe again through the overflow pipe, and the sealing property of the U-shaped stainless steel pipe can be maintained during the cleaning of the U-shaped stainless steel pipe, so as to avoid the overflow of toxic gas. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an external structure schematic view of the goaf closed wall toxic and harmful gas escape prevention device of the present application; Figure 2 It is a partial sectional view structure schematic view of the goaf closed wall toxic and harmful gas escape prevention device of the present application; Figure 3 It is a side view internal structure schematic view of the goaf closed wall toxic and harmful gas escape prevention device of the present application; Figure 4 It is an installation plate connection structure schematic view of the goaf closed wall toxic and harmful gas escape prevention device of the present application; Figure 5Structure diagram of auxiliary assembly in the goaf closure wall toxic and harmful gas escape prevention device of the present application; Figure 6 Structure diagram of the unfolding structure of the one-way valve and auxiliary frame in the goaf closure wall toxic and harmful gas escape prevention device of the present application; Figure 7 Structure diagram of the monitoring substation connection distribution in the goaf closure wall toxic and harmful gas escape prevention device of the present application; Figure 8 Structure diagram of the cleaning assembly in the goaf closure wall toxic and harmful gas escape prevention device of the present application.

[0019] In the figure: 1, goaf; 2, main roadway; 3, inclined floor; 4, sedimentation tank; 5, groove one; 6, U-shaped stainless steel pipe; 7, groove two; 8, closure wall one; 9, gas detector; 10, closure wall two; 11, concrete layer; 12, check valve; 13, main roadway drainage ditch; 14, auxiliary assembly; 1401, top wall; 1402, water diversion pipe; 1403, built-in wall one; 1404, built-in wall two; 15, mounting plate; 16, one-way valve; 17, auxiliary frame; 18, fixing bolt; 19, filter screen; 20, overflow pipe; 21, water supply pipe; 22, filter plate; 23, monitoring substation; 24, protective sleeve; 25, water supply branch pipe; 26, gate valve; 27, water level alarm sensor; 28, cleaning assembly; 2801, bottom plate; 2802, rubber sleeve; 2803, hydraulic rod; 2804, top disc; 2805, connecting rod; 2806, fixed plate; 2807, rubber plunger. DETAILED DESCRIPTION

[0020] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combinable with other embodiments.

[0024] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0025] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0026] As shown in Figures 1-7 The goaf sealing wall toxic and harmful gas escape device provided by the present application comprises an inclined floor 3 arranged in a goaf 1, a sedimentation tank 4 mounted at the end of the inclined floor 3, a groove 1 5 arranged on one side of the sedimentation tank 4, a U-shaped stainless steel pipe 6 mounted in the groove 1 5, a groove 2 7 mounted at the other end of the U-shaped stainless steel pipe 6, a concrete layer 1 1 arranged between the groove 1 5 and the groove 2 7, a sealing wall 1 8 arranged in the concrete layer 1 1, a sealing wall 2 10 mounted on one side of the sealing wall 1 8, and a gas detector 9 fixedly arranged on one side of the sealing wall 2 10.

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

[0028] It can be understood that the closed wall one 8 and the closed wall two 10 are built between the goaf 1 and the main roadway 2, the bottom is poured with the concrete layer 11, and the gas detector 9 is pre-installed between the closed wall one 8 and the closed wall two 10, which is used for monitoring the sealing property of the closed wall one 8 close to the goaf 1 side, the closed wall one 8 and the closed wall two 10 are 0.3m higher than the top and bottom plate of the goaf 1, which ensures that the goaf is isolated from the main roadway 2, the recess one 5 and the recess two 7 are built near the left and right sides close to the closed wall one 8 and the closed wall two 10, the bottom of the recess one 5 and the recess two 7 is connected by the end of the U-shaped stainless steel pipe 6 to form a communicating vessel, and the end of the U-shaped stainless steel pipe 6 is poured and compacted with the concrete layer 11 between the closed wall one 8, the closed wall two 10, the recess one 5 and the recess two 7.

[0029] The water level alarm sensor 27 is installed in the recess two 7, the top of the water level alarm sensor 27 is provided with the protective sleeve 24, the end of the protective sleeve 24 is installed with the monitoring and control substation 23, one side of the monitoring and control substation 23 is fixedly installed with the main roadway 2, one side of the bottom of the main roadway 2 is provided with the main roadway drainage ditch 13, the top of the main roadway drainage ditch 13 is installed with the filter plate 22, the main roadway drainage ditch 13 is located inside the main roadway 2 close to one side of the recess two 7, the water supply pipe 21 is arranged below the monitoring and control substation 23, one side of the water supply pipe 21 is installed with the water supply branch pipe 25, the end of the water supply branch pipe 25 is provided with the gate valve 26, the monitoring and control substation 23 is arranged on the roadway wall of the main roadway 2, the water level alarm sensor 27 is connected with the monitoring and control substation 23 through the cable, the outside of the cable is protected by the protective sleeve 24 made of rubber material, the water level alarm sensor 27 is arranged in the recess two 7 and is flush with the upper end of the U-shaped stainless steel pipe 6, the water supply branch pipe 25 is arranged above the recess two 7, the water supply branch pipe 25 is directly communicated with the water supply pipe 21 in the main roadway 2, the 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 from the water surface, the water level alarm sensor 27 triggers and sends a warning signal, the gate valve 26 is connected with the monitoring and control substation 23 through the controller, which is used for controlling the water flow switch, the gate valve 26 can be used to prevent water in the recess two 7 when the water level alarm sensor 27 alarms through the controller and the monitoring and control substation 23, which ensures that the water in the recess two 7 is sufficient and avoids the problem that the sealing effect is poor due to the decrease of the water in the U-shaped stainless steel pipe 6 caused by the decrease of the water in the recess two 7.

[0030] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 , one end of the U-shaped stainless steel pipe 6 is provided with the auxiliary frame 17, the inside of the auxiliary frame 17 is installed with the filter screen 19, the top of the auxiliary frame 17 is installed with the one-way valve 16, and the top of the one-way valve 16 is fixedly provided with the auxiliary assembly 14 for secondary water diversion through the 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 needs to be explained that the monitoring substation 23 and the controller can control the hydraulic rod 2803 to operate, the hydraulic rod 2803 can drive the top disc 2804, the connecting rod 2805, the fixed plate 2806 and the rubber paddle 2807 to move up or down, the rubber paddle 2807 will extend into the inside of the U-shaped stainless steel pipe 6, by moving up or down the rubber paddle 2807, the water in the U-shaped stainless steel pipe 6 can be constantly surged, when the water after surging surges up, the foreign matter filtered by the filter screen 19 can be pushed into the water pipe 1402 through the one-way valve 16, the backwashing water will enter between the built-in wall body one 1403 and the sedimentation tank 4, the area between the built-in wall body one 1403 and the sedimentation tank 4 can be used to carry out secondary precipitation on the backwashing water, so as to introduce the water after precipitation into the U-shaped stainless steel pipe 6 again through the overflow pipe 20, the outside of the whole hydraulic rod 2803 is provided with a rubber sleeve 2802, which can protect the hydraulic rod 2803 from outside when it is stretched and retracted.

[0035] Meanwhile, the application also provides a construction method of the goaf sealing wall anti-toxic and harmful gas diffusion device, and the construction method comprises the following steps: Step one, first build the sealing wall one 8 and the sealing wall two 10 between the goaf 1 and the main flat roadway 2, pour the concrete layer 11 at the bottom, and install the gas detector 9 between the sealing wall one 8 and the sealing wall two 10 in advance, which is used for monitoring the sealing property of the sealing wall one 8 close to the goaf 1, the sealing wall one 8 and the sealing wall two 10 are 0.3m higher than the top and bottom plate of the goaf 1, which ensures that the goaf is isolated from the main flat roadway 2, build the groove one 5 and the groove two 7 near the left and right sides of the sealing wall one 8 and the sealing wall two 10, connect the bottom of the groove one 5 and the groove two 7 with the U-shaped stainless steel pipe 6 to form a communicating vessel, and pour the concrete layer 11 between the U-shaped stainless steel pipe 6 and the sealing wall one 8, the sealing wall two 10, the groove one 5 and the groove two 7 to make them compact; Step two, a sedimentation tank 4 is arranged in the goaf 1 close to one side of the closed wall 8, the sedimentation tank 4 makes the solid particles in the waste water in the goaf gradually settle to the bottom of the tank under the action of gravity through physical sedimentation, the slope of the floor 3 away from the closed wall 8 on one side of the goaf 1 is controlled at 3%~5%, which meets the drainage demand of the goaf 1, the accumulated water in the goaf 1 can flow into the side of the inside of the sedimentation tank 4, that is, the area composed of the built-in wall body two 1404 and the sedimentation tank 4, the water after sedimentation will overflow from the area composed of the built-in wall body two 1404 and the sedimentation tank 4 to the area between the built-in wall body one 1403 and the built-in wall body two 1404, and then the upper water after sedimentation will be introduced to the U-shaped stainless steel pipe 6 in one direction through the design of the overflow pipe 20 and the check valve 12, the filter screen 19 arranged at the top of the U-shaped stainless steel pipe 6 can filter the introduced water, avoiding the internal rapid blockage of the U-shaped stainless steel pipe 6 caused by long-time water introduction, reducing the blockage frequency, the other end of the U-shaped stainless steel pipe 6 is in the groove two 7, the water level in the groove two 7 is higher than the end of the U-shaped stainless steel pipe 6, and the overflow accumulated water will flow into the main flat roadway drainage ditch 13 arranged in the main flat roadway 2; Step three, the monitoring and control substation 23 is arranged on the roadway wall of the main flat roadway 2, the water level alarm sensor 27 is connected with the monitoring and control substation 23 through the cable, the outside of the cable is protected by the rubber protective sleeve 24, the water level alarm sensor 27 is arranged in the groove two 7 and flush with the upper port of the U-shaped stainless steel pipe 6, the water supply branch pipe 25 is arranged above the groove two 7, the water supply branch pipe 25 is directly communicated with the water supply pipe 21 in the main flat roadway 2, the gate valve 26 is installed on the water supply branch pipe 25, when the port of the U-shaped stainless steel pipe 6 is exposed to the water surface, the water level alarm sensor 27 triggers and sends a warning signal, the gate valve 26 is connected with the monitoring and control substation 23 through the controller and is used for controlling the water flow switch, which can enable the gate valve 26 to prevent water from entering the groove two 7 through the controller and the monitoring and control substation 23 when the water level alarm sensor 27 alarms, ensuring that the water amount in the groove two 7 is sufficient and avoiding the problem that the poor sealing effect is caused by the decrease of the water amount in the groove two 7 and the water amount in the U-shaped stainless steel pipe 6; Step four, through monitoring the monitoring substation 23 and the controller can control the operation of the hydraulic rod 2803, the hydraulic rod 2803 can drive the top plate 2804, connecting rod 2805, fixed plate 2806 and rubber 2807 up or down, rubber 2807 will extend into the inside of the U-shaped stainless steel pipe 6, by up or down of rubber 2807 can be in the U-shaped stainless steel pipe 6 in the water constantly surge, after the surge of water up can be filtered by the filter screen 19 generated by the foreign matter can be pushed into the water pipe 1402 through the check valve 16, the backwashing water will enter to the built-in wall 1403 and the sedimentation tank 4, can use the area between the built-in wall 1403 and the sedimentation tank 4 to the backwashing water is precipitated twice, convenient for the water after precipitation using overflow pipe 20 is introduced into the U-shaped stainless steel pipe 6 again, the whole hydraulic rod 2803 is externally provided with rubber sleeve 2802, can protect from the outside when the hydraulic rod 2803 telescopic.

[0036] Embodiments of the application are presented for the purpose of illustration and description, and are not intended to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A device for preventing the escape of toxic and harmful gases from a goaf enclosure wall, characterized in that: The utility model provides a kind of mine water drainage system, including the inclined floor (3) being arranged in goaf (1) inside, and the end of inclined floor (3) is equipped with sedimentation tank (4), one side of the sedimentation tank (4) is provided with recess one (5), and U-shaped stainless steel pipe (6) is installed in recess one (5) inside, the other end of U-shaped stainless steel pipe (6) is equipped with recess two (7), and concrete layer (11) is arranged between recess one (5) and recess two (7), closed wall one (8) is arranged in concrete layer (11) inside, water level alarm sensor (27) is installed in recess two (7) inside, and protective sleeve (24) is provided at the top of water level alarm sensor (27), monitoring and control substation (23) is installed at the end of protective sleeve (24), water supply pipe (21) is provided below monitoring and control substation (23), and water supply branch pipe (25) is installed on one side of water supply pipe (21), and sluice valve (26) is provided at the end of water supply branch pipe (25).

2. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 1, characterized in that: One side of the monitoring and control substation (23) is fixedly installed with a main roadway (2), and a main roadway drainage ditch (13) is provided on one side of the bottom of the main roadway (2).

3. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 2, characterized in that: A filter plate (22) is installed on the top of the main roadway drainage ditch (13), and the main roadway drainage ditch (13) is located inside the main roadway (2) and close to one side of the recess two (7).

4. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 1, characterized in that: A closed wall two (10) is installed on one side of the outside of the closed wall one (8), and a gas detector (9) is fixedly provided on one side of the closed wall two (10).

5. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 4, characterized in that: The height of the closed wall one (8) and the closed wall two (10) is higher than the goaf (1), and the closed wall one (8) and the closed wall two (10) are 0.3m higher than the top and the floor of the goaf (1).

6. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 1, characterized in that: An auxiliary frame (17) is provided at one end of the U-shaped stainless steel pipe (6), and a filter screen (19) is installed in the auxiliary frame (17), a one-way valve (16) is installed on the top of the auxiliary frame (17), and an auxiliary assembly (14) for secondary water diversion is fixedly provided on the top of the one-way valve (16) by a fixing bolt (18).

7. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 6, characterized in that: The auxiliary assembly (14) comprises a top wall (1401), a water diversion pipe (1402), an inner wall one (1403) and an inner wall two (1404), the inner wall one (1403) is provided at the bottom of the top wall (1401), the inner wall two (1404) is installed on one side of the inner wall one (1403), and the water diversion pipe (1402) is arranged in the top wall (1401).

8. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 6, characterized in that: A water diversion pipe (1402) is installed on 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 a spillway (20) is installed at the end of the check valve (12).

9. The goaf closure wall anti-toxic and harmful gas diffusion device according to claim 8, characterized in that: The upper part of the U-shaped stainless steel pipe (6) is provided with a cleaning assembly (28) for cleaning the U-shaped stainless steel pipe (6), and the cleaning assembly (28) comprises a bottom plate (2801), a rubber sleeve (2802), a hydraulic rod (2803), a top plate (2804), a connecting rod (2805), a fixed plate (2806) and a rubber paddle (2807), the outer surface of the bottom plate (2801) is provided with a rubber sleeve (2802), and the middle part of the rubber sleeve (2802) is provided with a hydraulic rod (2803), 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 fixed plate (2806), and the bottom of the fixed plate (2806) is provided with a rubber paddle (2807).

10. A construction method of the goaf closure wall anti-toxic and harmful gas diffusion device according to any one of claims 1-9, characterized in that, The construction method comprises the following steps: Step one: build closed wall one (8) and closed wall two (10) between goaf (1) and main roadway (2), use concrete layer (11) to pour at the bottom, and install gas detector (9) in advance between closed wall one (8) and closed wall two (10); Step two: the sedimentation tank (4) makes the solid particles in the wastewater in the goaf gradually settle to the bottom of the tank under the action of gravity through physical sedimentation, the accumulated water in the goaf (1) flows into one side of the inside of the sedimentation tank (4) by itself, the other end of the U-shaped stainless steel pipe (6) is in the groove two (7), the water level line in the groove two (7) is higher than the end of the U-shaped stainless steel pipe (6), and the overflow accumulated water flows into the main roadway drainage ditch (13) arranged in the main roadway (2); Step three: when the port of the U-shaped stainless steel pipe (6) is exposed to the water surface, the water level alarm sensor (27) triggers and sends a warning signal, the gate valve (26) is connected with the monitoring and control substation (23) through the controller for controlling the water flow switch, and the gate valve (26) is enabled by the controller and the monitoring and control substation (23) to prevent water from entering the groove two (7) when the water level alarm sensor (27) alarms; Step four: the area between the built-in wall one (1403) and the sedimentation tank (4) is used for secondary sedimentation of backwashing water, so that the water after sedimentation is introduced into the U-shaped stainless steel pipe (6) again through the overflow pipe (20).

Images