A system and method for controlling corner gas by cooperating with gas blocking wall and magnetic activator

Abstract

The invention discloses a system and method for controlling corner gas by coordinating a plugging gas wall with a magnetized active agent, comprising a gas wall component and a spray component, wherein the gas wall component is arranged on a mining channel, and the spray component is arranged near the corner, and the gas wall component is used to plug the channel where the working face is located; the spray component is used to spray the magnetic surfactant into the corner area; the gas wall component comprises a gas pipeline, a pressure gauge, an air bag, a buckle, an air charging valve, a safety valve and a pressure relief hole; the air charging valve, the safety valve and the pressure relief hole are all arranged on the air bag, and each air bag is provided with a buckle ring, and the adjacent air bags are connected with the buckle ring by the buckle, and the air bags are stacked in sequence in the height direction; the system provided in the invention has a small engineering workload during construction and operation, and can be used without the need to build additional large-scale equipment, thereby simplifying the use process and being suitable for safe and efficient use by coal mine workers.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft coal mine operation, and in particular to a system and method for controlling corner gas by cooperating with a gas blocking wall and a magnetized activator. Background Art

[0002] Over the years, the problem of excessive gas in the corners of coal mining faces has been a technical problem during mining, and has never been effectively solved. The existing gas control technology for working faces, especially the technology for controlling excessive gas outburst in corners, is still not perfect.

[0003] There are roughly two types of existing technologies. One is to increase the air volume by controlling the wind flow through wind barriers. This technology may cause air leakage in the goaf of the working face, causing the return air corner gas to continue to exceed the limit. The other is to use adjacent tunnels to extract gas to reduce the gas in the corners of the working face. This technology requires a large amount of engineering and has poor extraction effects, mainly manifested in small flow rates and low extraction concentrations. Therefore, there is an urgent need for a simple, easy and effective method to deal with gas outbursts in corners. On the one hand, reduce the amount of air entering the goaf, reduce the amount of gas outbursts in the goaf, and prevent gas from exceeding the limit in the corners; on the other hand, inhibit gas desorption in the coal body of the working face, the top coal in the goaf, and the remaining coal, prolong the gas release rate, and reduce the amount of gas released. Summary of the invention

[0004] The purpose of the present invention is to provide a system and method for controlling corner gas by cooperating with a gas blocking wall and a magnetized activator in order to solve the following problems: 1. The existing technology has a large amount of work to deal with excessive upper corner gas and has a poor extraction effect, small flow rate and low extraction concentration; 2. The existing technology uses ventilation to control the problem of excessive corner gas, which can only dilute the gas in the corner, and has no obvious effect on the gas source in the goaf that causes the excessive return air corner gas, and is likely to cause air leakage in the goaf of the working face, causing the excessive return air corner gas phenomenon to continue to occur; 3. Most of the existing gas inhibitors are single reagents, which have a poor effect on extending the gas release rate, require a large amount of solution and have a poor effect on reducing the gas release amount.

[0005] The present invention is achieved through the following scheme:

[0006] A system for controlling corner gas by cooperating with a sealing gas wall and a magnetic surfactant comprises a gas wall component and a spray component. The gas wall component is arranged on a mining channel, and the pipeline of the spray component is arranged along an air inlet lane and a return air lane, and a spraying end is arranged toward the corner area. The gas wall component is used for sealing the channel where the working face is located; and the spray component is used for spraying the magnetic surfactant into the corner area.

[0007] Preferably, the gas wall assembly includes a gas pipeline, a pressure gauge, an airbag, a buckle, an inflation valve, a safety valve and a pressure relief hole; the inflation valve, safety valve and pressure relief hole are all arranged on the airbag, each airbag is provided with a buckle ring, the adjacent airbags are connected with the buckle ring through the buckle, and the airbags are arranged in multiple shapes stacked in sequence along the height direction.

[0008] Preferably, the pressure gauge is arranged on the gas pipeline, and each airbag is filled through the gas pipeline, so that a single airbag can adapt to the plane where it is located and be completely blocked;

[0009] Preferably, the airbag comprises an inner liner and an outer liner, the inner and outer liner are made of retractable double-anti-static coated cloth, and a reinforcement layer made of flame-retardant and antistatic soft PVC material is provided on the outer liner.

[0010] Preferably, the spray assembly includes a surfactant preparation device, a magnetized water generating device, a spray pipeline and a spray outlet; the surfactant preparation device is connected to the magnetized water generating device, the spray outlet is arranged on the spray pipeline, the spray outlet is arranged along the air inlet and return air lanes, and the spray outlet can spray the magnetized surfactant into the corner working surface space.

[0011] Preferably, the surfactant preparation device includes a liquid storage tank, a rotor flowmeter and a booster pump; a main pipeline is arranged between the booster pump and the magnetized water generating device, multiple liquid storage tanks are arranged along the liquid flow direction of the main pipeline, and the rotor flowmeter is respectively connected to the treatment tank and the main pipeline.

[0012] Preferably, the magnetized water generating device comprises an inlet pipe, an outlet pipe, a magnetized water pipe, a connector, a water pipe fixing frame and a shell, wherein the magnetized water pipe is arranged in multiple layers in the shell along the height direction, and the magnetized water pipe is arranged in multiple layers in the shell along the width direction, the magnetized water pipes in each layer of the magnetized water pipe group are connected in parallel through the connector, and the magnetized water pipe groups at adjacent layers are connected in series through the connector, the inlet pipe is connected to the magnetized water pipe at the top layer, the outlet pipe is connected to the magnetized water pipe group at the bottom layer, and the water pipe fixing frame fixes each magnetized water pipe in the box body.

[0013] The present invention also provides a method for treating corners by using a gas blocking wall and a magnetic active agent in coordination, comprising the following steps:

[0014] Step 1: An airbag assembly is arranged at the intersection area between the goaf and the working face, and is pressurized;

[0015] Step 2: Spraying a magnetized surfactant on the corner working surface;

[0016] Step three: Release the pressure and move the airbag assembly. When the airbag assembly is moved to the appropriate position, start the spray assembly to inhibit gas desorption. The magnetized active agent is sprayed at the corners through the coordinated management pipeline system to achieve the purpose of rapid corner gas management. Then repeat steps one and two.

[0017] In step one, the filling sequence of the airbag in the airbag assembly is from top to bottom; in step three, the pressure relief sequence of the airbag is from bottom to top.

[0018] In step three, a single pillar is provided at the corner, and the single pillar and the corner sealing gas wall are moved forward one step distance by cutting twice. Two people are required to work together, one observes the roof, and the other recovers the pillar and moves the corner sealing gas wall forward; when unloading the pressure, the gas in the airbag can choose to unload a certain pressure according to the filling and compaction conditions of the goaf, the crushing of the roof, etc., and then move forward with pressure by a hand winch or a column return winch.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. The system provided in the present invention requires little engineering work during construction and operation, and can be used without the need to construct additional large-scale equipment, thus simplifying the use process and being suitable for safe and efficient use by coal mine workers.

[0021] 2. The present invention can effectively reduce the air volume entering the goaf, reduce the gas outflow from the goaf, and at the same time inhibit the gas desorption of the coal body of the working face, the top coal in the goaf and the residual coal, slow down the gas release rate, and reduce the gas release amount, thereby avoiding gas exceeding the limit in the corner.

[0022] 3. The present invention utilizes the synergistic effect of the active agent and the magnetic field to prolong the gas release rate, and the amount of solution used is small, which greatly reduces the gas release amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention from a top view;

[0024] Figure 2 It is a schematic diagram of the side view structure of the gas wall assembly in the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the magnetized water generating device and the surfactant preparing device in the present invention;

[0026] Description of the drawings: 1. Air wall assembly; 2. Spray assembly; 11. Gas pipeline; 12. Pressure gauge; 13. Air bag; 14. Buckle; 15. Inflating valve; 16. Safety valve; 17. Pressure relief hole; 21. Surfactant preparation device; 22. Magnetized water generating device; 23. Spray pipeline; 24. Spray port; 211. Liquid storage tank; 212. Rotor flowmeter; 213. Booster pump; 214. Main pipeline; 221. Water inlet pipe; 222. Water outlet pipe; 223. Magnetized water pipe; 224. Connector; 225. Shell; 31. Air inlet lane; 32. Return air lane. DETAILED DESCRIPTION

[0027] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0028] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other alternative features that are equivalent or have similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0031] Example 1

[0032] like Figures 1 to 3 As shown, a system for controlling corner gas by cooperating with a sealing gas wall and a magnetic surfactant comprises a gas wall component 1 and a spray component 2. The gas wall component 1 is arranged on the mining channel, and the spray component 2 is arranged near the corner surface. The gas wall component 1 is used to seal the channel where the working surface is located, so that the upper corner area is ventilated smoothly and the accumulation of gas is reduced; the spray component 2 is used to spray the magnetic surfactant into the corner area to suppress the desorption of gas and reduce the generation of gas.

[0033] The gas wall assembly 1 includes a gas pipeline 11, a pressure gauge 12, an airbag 13, a buckle 14, an air charging valve, a safety valve 16 and a pressure relief hole 17; the air charging valve, the safety valve 16 and the pressure relief hole 17 are all arranged on the airbag 13, the gas is charged into the airbag 13 through the air charging valve, the pressure in the airbag 13 is released through the pressure relief hole 17, and the safety valve 16 is used to ensure that the airbag 13 is used within a safe range;

[0034] Each airbag 13 is provided with a buckle 14 ring, and the adjacent airbags 13 are connected with the buckle 14 ring by the buckle 14. The airbags 13 are stacked in sequence along the height direction to form a plurality of airbags 13. The number of buckled airbags 13 required is adjusted according to demand, so that the air wall finally formed can completely block the channel;

[0035] The pressure gauge 12 is arranged on the gas pipeline 11, and each air bag 13 is filled through the gas pipeline 11, so that a single air bag 13 can adapt to the plane where it is located and be completely blocked;

[0036] In the present invention, the filling step of the airbag 13 is from top to bottom, that is, the top airbag 13 is filled first, and then filled downwards in sequence. During the filling, the airbag 13 at the top position is automatically supported to the top position for blocking due to the filling support of the bottom airbag 13, and the filling can be performed without additional auxiliary equipment;

[0037] The decompression sequence of the airbag 13 is from bottom to top, that is, the air pressure of the bottom airbag 13 is released first to shrink the bottom airbag 13, and the top airbag 13 falls automatically or can be dropped by dragging by hand, and the decompression operation can be performed without additional auxiliary equipment.

[0038] The airbag 13 includes an inner liner and an outer liner, and the inner and outer liner are made of retractable double-resistant coated cloth. A reinforcing layer made of flame-retardant and antistatic soft PVC material is arranged on the outer liner, which mainly plays the role of closing the corner space, and the larger internal pressure is basically borne by the inner liner, so the inner liner needs to use a material with good pressure resistance, and the outer liner needs to use a wear-resistant and antistatic material.

[0039] The flame-retardant and antistatic soft PVC material uses high-strength polyester lattice cloth as the skeleton, and has the advantages of high strength, large deformation range, light weight, folding resistance, easy processing and repair, good sealing performance and long service life; the inner and outer bladder combined structure airbag 13 made of the above two materials can give full play to the advantages of their respective materials and can achieve the purpose of timely and continuous blocking of corners.

[0040] The spray assembly 2 includes a surfactant preparation device 21, a magnetized water generating device 22, a spray pipeline 23 and a spray port 24; the surfactant preparation device 21 is connected to the magnetized water generating device 22, the spray port 24 is arranged on the spray pipeline 23, and the spray port is arranged along the air inlet and return air lanes. The spray port 24 can spray the magnetized surfactant in the corner working surface space.

[0041] The surfactant preparation device 21 includes a liquid storage tank 211, a rotor flowmeter 212 and a booster pump 213; a main pipeline 214 is arranged between the booster pump 213 and the magnetized water generating device 22, and multiple liquid storage tanks 211 are arranged along the liquid flow direction of the main pipeline 214. The rotor flowmeter 212 is respectively connected to the processing tank and the main pipeline 214. The rotor flowmeter 212 is used to accurately control the solution or liquid in the liquid storage tank 211 to configure a surfactant composite solution of a suitable proportion. The fixed solutions in different tanks are mixed during the transportation process of the main pipeline 214 through the pumping of the booster pump 213, and the mixed surfactant composite solution enters the magnetized water generating device 22 for magnetization.

[0042] The magnetized water generating device 22 comprises an inlet pipe 221, an outlet pipe 222, a magnetized water pipe 223, a connector 224, a water pipe fixing frame (not shown) and a shell 225. The magnetized water pipe 223 is arranged in multiple layers along the height direction in the shell 225, and the magnetized water pipe 223 is arranged in multiple layers along the width direction in the shell 225. The magnetized water pipes 223 in each layer of the magnetized water pipe 223 group are connected in parallel through the connector 224, and the magnetized water pipe 223 groups of adjacent layers are connected in series through the connector 224. The inlet pipe 221 is connected to the magnetized water pipe 223 on the top layer, and the outlet pipe 222 is connected to the magnetized water pipe 223 group on the bottom layer. The water pipe fixing frame fixes each magnetized water pipe 223 in the box body.

[0043] The gas wall assembly 1 and the spray assembly 2 can be connected or separately arranged. When they are separately arranged, the gas wall assembly 1 and the spray assembly 2 operate independently, the gas wall assembly 1 realizes blocking, and the spray system sprays the magnetized activator at the corner position, ultimately forming a coordinated prevention and control of rapid blocking of the corners of the comprehensive mining working face of the protruding coal seam and gas desorption inhibition.

[0044] Based on the above structure, by arranging the magnetized water pipes 223 in series and parallel up and down, the volume of the magnetized water generating device 22 can be reduced, and by arranging the pipelines in series and parallel, the flow rate of the surfactant composite solution in the magnetized water pipe 223 can be slowed down, the time of the surfactant composite solution in the magnetized water pipe 223 can be extended, and the magnetization effect can be ensured.

[0045] This system can have the following advantages:

[0046] 1. The project volume is small and there is no need to build additional large equipment.

[0047] 2. While reducing the air volume entering the goaf and the gas outflow from the goaf, it can also inhibit the gas desorption of the coal body on the working face, the top coal in the goaf and the remaining coal, prolong the gas release rate, reduce the gas release amount, and thus avoid gas exceeding the limit in the corners.

[0048] 3. This patent utilizes the synergistic effect of the active agent and the magnetic field to extend the gas release rate, and the amount of solution used is small, which greatly reduces the gas release amount.

[0049] Example 2

[0050] The present invention also provides a method for controlling corner gas by using a gas blocking wall and a magnetic activator in coordination, which specifically comprises the following steps:

[0051] Step 1: An air bag 13 assembly is set at the intersection area between the goaf and the working face, and is pressurized to reduce the amount of air entering the goaf and reduce the accumulation of gas at the intersection of the goaf and the working face;

[0052] Step 2: Spraying a magnetized surfactant on the corner working surface to desorb and inhibit the accumulation of gas and reduce the formation of gas;

[0053] Step three: Release the pressure and move the airbag 13 assembly. When the airbag 13 assembly is moved to the appropriate position, start the spray assembly to inhibit gas desorption. The magnetized active agent is sprayed at the corners through the coordinated management pipeline system to achieve the purpose of rapid corner gas management. Then repeat steps one and two.

[0054] In step 1, the filling order of the middle airbag 13 of the airbag 13 assembly is from top to bottom, that is, the top airbag 13 is filled first, and then filled downwards in sequence. During the filling, due to the filling support of the bottom airbag 13, the airbag 13 at the top position is automatically supported to the top position for blocking, and the filling can be performed without additional auxiliary equipment;

[0055] In step 2, a step of preparing a magnetized surfactant is also included: first, the base liquids in different liquid storage tanks 211 are mixed in a certain proportion to prepare a surfactant, and then pumped to the magnetized water generating device 22 for magnetization, and after the magnetized water generating device 22 is fully magnetized, it is pumped to the spray assembly 2;

[0056] In step three, the pressure relief order of the airbag 13 is from bottom to top, that is, the air pressure of the bottom airbag 13 is released first to shrink the bottom airbag 13, and the top airbag 13 falls automatically, or can be dropped by dragging it by hand, and the pressure relief operation can be performed without additional auxiliary equipment.

[0057] In step three, a single pillar is provided at the corner, and the single pillar and the corner sealing gas wall are moved forward one step distance by cutting twice. Two people are required to work together, one observes the roof, and the other recovers the pillar and moves the corner sealing gas wall forward; when unloading pressure, the gas in the airbag 13 can choose to unload a certain pressure according to the filling and compaction conditions of the goaf, the crushing of the roof, etc., and then move forward with pressure by a hand winch or a return column winch.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas blocking wall and a magnetic activator are used to coordinately treat a corner gas system, characterized in that: It comprises an air wall component and a spray component, wherein the air wall component is arranged on the mining channel, the pipeline of the spray component is arranged along the air inlet lane and the return air lane, the spray end is arranged toward the corner area, and the air wall component is used to block the channel where the working face is located; the spray component is used to spray the magnetic surfactant into the corner area; the spray component comprises a surfactant preparation device, a magnetized water generating device, a spray pipeline and a spray port; the surfactant preparation device is connected to the magnetized water generating device, the spray port is arranged on the spray pipeline, the spray port is arranged along the corner area, and the spray port can spray the magnetized surfactant into the corner working face space; the surfactant preparation device comprises a liquid storage tank, a rotor flowmeter and a booster pump; a main pipeline is arranged between the booster pump and the magnetized water generating device, and the liquid storage tank is arranged along the liquid flow direction of the main pipeline The magnetized water generating device comprises a water inlet pipe, a water outlet pipe, a magnetized water pipe, a connector, a water pipe fixing frame and a shell, wherein the magnetized water pipe is arranged in multiple layers in the shell along the height direction, and the magnetized water pipe is arranged in multiple layers in the shell along the width direction, the magnetized water pipes in each layer of the magnetized water pipe group are connected in parallel through the connector, and the magnetized water pipe groups of adjacent layers are connected in series through the connector, the water inlet pipe is connected to the magnetized water pipe of the top layer, the water outlet pipe is connected to the magnetized water pipe group of the bottom layer, and the water pipe fixing frame fixes each magnetized water pipe in the shell; the air wall assembly comprises an air bag, and the air bag comprises an inner liner and an outer liner; a reinforcing layer made of flame-retardant and antistatic soft PVC material is arranged on the outer liner; the flame-retardant and antistatic soft PVC material adopts high-strength polyester lattice cloth as the skeleton.

2. A gas blocking wall and magnetic active agent synergistically controlling corner gas system as claimed in claim 1, characterized in that: The gas wall assembly also includes a gas pipeline, a pressure gauge, a buckle, an inflation valve, a safety valve and a pressure relief hole; the inflation valve, safety valve and pressure relief hole are all arranged on the airbag, and each airbag is provided with a buckle ring, and adjacent airbags are connected with the buckle ring through the buckle, and the airbags are stacked in sequence along the height direction.

3. A gas blocking wall and magnetic active agent synergistically controlling corner gas system as claimed in claim 2, characterized in that: The pressure gauge is arranged on the gas pipeline, and each air bag is filled through the gas pipeline, so that a single air bag can adapt to the plane where it is located and be completely blocked.

4. A gas blocking wall and magnetic activator synergistically controlling corner gas system as claimed in claim 2 or 3, characterized in that: The inner and outer bladders are made of retractable double-resistance coated cloth.

5. A method for collaboratively managing corner gas systems by using a gas blocking wall and a magnetically activated agent to collaboratively manage corner gas systems based on any one of claims 1 to 4, characterized in that: The steps include: Step 1: An airbag assembly is arranged at the intersection area between the goaf and the working face, and is pressurized; Step 2: Spraying a magnetized surfactant on the corner working surface; Step three: Release the pressure and move the airbag assembly. When the airbag assembly is moved to the appropriate position, start the spray assembly to inhibit gas desorption. The magnetized active agent is sprayed at the corners through the coordinated management pipeline system to achieve the purpose of rapid corner gas management. Then repeat steps one and two.

6. The method according to claim 5, characterized in that: In step one, the filling sequence of the airbag in the airbag assembly is from top to bottom; in step three, the pressure relief sequence of the airbag is from bottom to top.

7. The method according to claim 5, characterized in that: In step three, a single pillar is provided at the corner, and the single pillar and the corner sealing gas wall are moved forward one step distance by cutting twice. Two people are required to work together, one observes the roof, and the other recovers the pillar and moves the corner sealing gas wall forward; when unloading pressure, the gas in the airbag chooses to unload a certain pressure according to the filling and compaction conditions of the goaf and the crushing conditions of the roof, and then moves forward with pressure by a hand winch or a column return winch.

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