CN108180034B - An application method for gas control in upper corner of coal mine based on water-gas vortex fluid - Google Patents

Abstract

An application method for treating coal mine corner gas based on water vapor vortex fluid, which belongs to the technical field of fluid application and is characterized in that two fluids with completely different physical properties of liquid phase and gas phase are mixed to generate multiphase flow water vapor vortex fluid, so that the fluid is filled in the coal mine upper corner, and the coal mine upper corner gas overflows into a main wind flow for dilution and discharge through continuous vortex flow, or is combined with liquid particles to be discharged along with coal mine minerals or other liquid-solid matters; and the vortex fluid flows to fill the upper corner of the coal mine, so that the space can not generate gas accumulation. The invention avoids the occurrence of a malignant event caused by the uncontrolled gas at the upper corner, and has very important application prospect and significance. The invention is simple and reliable in coal mine upper corner gas treatment, easy to operate, timely, thorough and efficient, and does not cause secondary pollution.

Description

An application method for gas control in upper corner of coal mine based on water-gas vortex fluid

technical field

The invention relates to an application method for controlling gas in the upper corner of a coal mine based on a water-gas vortex fluid, which belongs to the technical field of fluid application, and specifically relates to a method for mixing two fluids with completely different physical properties, a liquid phase and a gas phase, to generate a Multiphase flow of water and gas vortex fluid, so that the fluid fills the upper corner of the coal mine, and through the continuous vortex flow, the gas in the upper corner of the coal mine overflows into the main wind flow for dilution and discharge, or combines with liquid particles with coal mine minerals or Other liquid and solids are discharged together; and the upper corner of the coal mine is filled with vortex fluid flow so that gas accumulation cannot be generated in this space.

Background technique

Gas refers to the harmful gas mainly composed of methane in coal mines, and sometimes refers to methane alone. Gas is a colorless, tasteless, odorless, combustible or explosive gas, insoluble in water, and has higher diffusivity than air. Gas is non-toxic, but in very high concentrations, it can cause suffocation. There are two main forms of occurrence of gas in the coal seam: the gas in the permeable space is mainly in the free gas state, called free gas or free gas, and the gas in this state obeys the ideal gas state equation; the other is called adsorption. Gas, which is mainly adsorbed on the microporous surface of coal and inside coal particles, occupies vacancies in the coal molecular structure or spaces between coal molecules.

Mine gas does not support combustion, but when it is mixed with air to a certain concentration, it can burn and explode in case of fire. When gas explodes, it will produce 3 deadly factors: explosion flame, explosion shock wave and poisonous and harmful gas. The gas explosion not only caused a large number of casualties, but also severely destroyed mine facilities and interrupted production. Mine gas explosions often cause secondary disasters such as coal dust explosions, mine fires, tunnel collapse and roof falling.

Three conditions must be met to cause gas combustion and explosion: a certain concentration of methane, a certain temperature ignition source and enough oxygen.

The upper corner is the corner between the return air trough and the back of the mining face. Since the wind flow brings the gas from the working face to the return air trough, the gas is easy to accumulate in the upper part of this place, so the gas in this place is easy to exceed the limit, so the above Corner gas concentration is the focus of coal mine safety monitoring. Timely disposal of locally accumulated gas is an important part of daily gas management in mines, and it is also a key task to prevent gas explosion accidents and ensure safe production. However, the contradiction between the easy occurrence of gas accumulation and the extremely complex and backward gas treatment methods is very prominent. Name---Technical method for gas extraction from mining fissure zone based on kilometer directional drilling, application number CN201710511319.4 M directional drilling to drain the gas in the mining fracture zone can effectively solve the problem of excess accumulation in the upper corner. Obviously, this method minimizes the accumulation problem and does not completely solve the accumulation problem; as in the patent: Invention Name --- A method for follow-up gas extraction in goaf of U-shaped ventilation working face, application number CN201710467143.7, which reduces the return air flow at the corner of the working face in the goaf by diverting the ventilation of the working face The gas source in the middle of the coal mine increases the gas extraction rate of the working face and achieves the effect of safe and efficient recovery, but it still cannot completely solve the problem of gas accumulation. In the main wind flow, and the application method to ensure that the limited space of the upper corner does not generate gas accumulation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to disclose a method for controlling gas in the upper corner of coal mines based on water-gas vortex fluid, in order to solve the existing and unsolvable problems in the above-mentioned prior art, thereby to disclose a method that completely separates the two physical properties of liquid phase and gas phase. Different fluids are mixed to form a multi-phase water-gas vortex fluid, which fills the upper corner of the coal mine, and the gas in the upper corner of the coal mine overflows into the main wind flow through continuous vortex flow for dilution and discharge, or combined with the gas. The liquid particles are combined and discharged together with coal mine minerals or other liquid and solid substances; and the vortex fluid flow fills the upper corner of the coal mine to prevent gas accumulation in this space. The technical scheme of the device and the application method is simple, reliable, and reliable. The water-gas vortex fluid treatment device is easy to operate, can be timely, reliable, thorough, efficient, and does not cause secondary pollution, so as to avoid the occurrence of malignant events caused by the uncontrolled gas in the upper corner.

The invention is a device for controlling gas in the upper corner of a coal mine based on a water-gas vortex fluid. , so that the fluid fills the upper corner of the coal mine, and through the continuous vortex flow, the gas in the upper corner of the coal mine overflows into the main air flow for dilution and discharge, or is combined with liquid particles and discharged together with coal mine minerals or other liquid and solids; Moreover, the vortex fluid flow fills the upper corner of the coal mine to prevent gas accumulation in this space. Column 5, air flow guide overflow baffle 6, upper corner 7, goaf 8, working face coal wall 9, coal mining face 10, main air flow 11, top plate 12 and bottom plate 13, pressure water channel 1 and pressure gas Road 2 is used as the power source of the gas-water atomization device, their working pressure range is 0.2-0.6Mpa, the volume ratio of dosage is 1:0.05-0.001, and the gas-water vortex generating device 4 is respectively connected to the pressure waterway through the intelligent controller 3 1 and the pressure gas path 2, the fixed pillars 5 are supported between the top plate 12 and the bottom plate 13, the fixed pillars 5 are divided into single arrangement or multiple arrangements, and the fixed pillars 5 are arranged in the upper, middle, and lower regions of the upper corner 7. In the position where they are combined with each other, the air-water vortex generator 4 is fixed on the side of the upper part of the fixed pillar 5 close to the upper corner 7, so that it sprays the air-water atomization to the position of the top plate 12 with an upward inclination angle of 30--45 degrees. Vortex fluid, the wind flow guide overflow baffle 6 is installed on the fixed support 5 toward the coal wall 9 side of the working face along the flow direction of the main wind flow 11 .

The above-mentioned application method for controlling gas in the upper corner of coal mines based on water-gas vortex fluid:

Ⅰ First, install the fixed pillars 5 in the working surface to be supported between the top plate 12 and the bottom plate 13. The fixed pillars 5 are divided into single arrangement or multiple arrangements. The fixed pillars 5 are arranged in the upper area, middle area, lower area and In the position where they are combined with each other, the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7, so that the gas-water vortex can be sprayed to the position of the top plate 12 at an upward inclination angle of 30-45 degrees. The vortex fluid is atomized, and the wind flow guide overflow baffle 6 is installed on the fixed support 5 toward the coal wall 9 side of the working face along the flow direction of the main wind flow 11 .

Ⅱ After installation, press to open the pressure water and pressure air to the pressure water circuit 1 and the pressure air circuit 2 respectively. Under the control of the intelligent controller 3, the pressure water and the pressure air enter the air-water vortex generating device 4, and when the air-water vortex occurs The outlet of the device 4 sprays the water-air vortex fluid to the top plate 12. According to the distance between the gas-water vortex generating device 4 and the top plate 12 and the volume of the upper corner 7, the intelligent controller 3 controls the pressure and flow of the pressurized water and the pressurized air. To generate air vortex, water vortex, water vapor combined vortex fluid.

Ⅲ The gas vortex, water vortex and water-gas combined vortex generated by II are first combined with gas to form a gas vortex through energy transfer. The wind flow guides the overflow baffle 6 at the joint, and the first function of the wind flow guide and overflow baffle 6 is to make the main wind flow 11 with gas flow in the direction of the main wind flow 11 after flushing the coal mining face 10, so that the air diffused in the goaf 8 flows. The turbid wind can also smoothly enter the flow direction of the main wind flow 11 through the upper corner 7, and the second function of the wind flow guide overflow baffle 6 is to make the continuous vortex flow so that the gas in the upper corner of the coal mine overflows into the main wind flow 11 for dilution and discharge. Secondly, be filled in the upper corner 7 by the vortex fluid flow, because the vortex fluid continuously flows and the wind flow guides the overflow baffle 6 guiding effect, the wind flow guides the overflow baffle 6 close to the vortex on the upper corner 7 side The kinetic energy of the fluid flow is greater than the energy of the main wind flow 11 on the side of the wind flow guiding the overflow baffle 6 close to the coal wall 9 of the working face, so that the limited space of the upper corner 7 does not generate gas accumulation; as the gas is combined with the main wind flow 11, And flow together with the main wind flow 11, so that the gas can be safely discharged in a gaseous manner;

The gas vortex is formed by the combination of gas vortex, water vortex, water-gas combined vortex and gas. The gas vortex runs to the joint with the main wind flow 11 and the wind flow is guided to the overflow baffle 6. The gas vortex is combined with the main wind flow 11 to form a gas vortex. The minerals in the space are combined and flow together with the minerals in the main wind flow 11, so that the gas can be safely discharged by combining with solids; the water-air vortex is combined with the gas through the air vortex, water vortex, and water-vapor combined vortex. A gas vortex is formed, and the gas vortex runs until the wind flow guides the overflow baffle 6 with the flow direction of the main wind flow 11. The gas vortex is combined with the liquid material in the main wind flow 11 and flows together with the liquid material in the main wind flow 11. In this way, the gas can be safely discharged in combination with liquid substances;

Through the continuous flow of the water-gas vortex fluid in the multiphase flow, the gas content in the upper corner 7 is getting lower and lower. Since the multiphase water-gas vortex fluid occupies the entire upper corner 7 space, due to the outward diffusion of the water-gas vortex fluid The kinetic energy is greater than the kinetic energy of the gas diffusing to the upper corner 7 of the working face, so there will be no gas accumulation in the upper corner 7 space;

Ⅳ As the working face is pushed forward, a new fixed pillar 5 is first installed in the space of the upper corner 7 to be expanded to be supported between the top plate 12 and the bottom plate 13. The fixed pillar 5 is divided into single arrangement or multiple arrangements. The fixed pillar 5 Arranged in the upper area, middle area, lower area of the upper corner 7 and the positions where they are combined with each other, and fix the new air-water vortex generator 4 on the upper part of the new fixed pillar 5 near the upper corner 7, so that The air-water atomized vortex fluid can be ejected to the new position of the top plate 12 at an upward inclination angle of 30 degrees to 45 degrees. The new fixed pillar 5 is facing the coal wall 9 side of the working face and a new air flow guide is installed along the flow direction of the main air flow 11. After the overflow baffle 6 is installed and connected in the manner described in I, it starts to spray the gas-water atomized vortex fluid, so that the vortex fluid can satisfy the continuous flow of the multiphase water-gas vortex fluid, and the upper corner 7 The gas content is getting lower and lower, and the multiphase water-gas vortex fluid occupies the entire upper corner 7 space. The kinetic energy of the water-gas vortex fluid diffusing outward is greater than the kinetic energy of the gas diffusing in the upper corner 7 of the working face. 7. There will be no gas accumulation in the space; then the intelligent controller 3 turns off the old air-water vortex generating device 4 pressure water and pressure gas, and cuts off the air-water vortex generating device 4 and the old wind flow on the old fixed support 5 Guide the overflow baffle 6, so that the new upper corner 7 can be pushed along with the working face, so as to reciprocate; through the continuous flow of the multi-phase water-gas vortex fluid, the gas content of the new upper corner 7 becomes more and more Low, because the multiphase water-gas vortex fluid occupies the entire upper corner 7 space, and the kinetic energy of the water-gas vortex fluid diffusing outward is greater than the kinetic energy of the working face gas diffusing to the upper corner 7, so there will be no space in the upper corner 7. The gas is concentrated, thus avoiding the occurrence of vicious events caused by the loss of gas control in the upper corner 7.

The invention is an application method for controlling gas in the upper corner of a coal mine based on a water-gas vortex fluid. A multiphase water-air vortex that is completely different from the original fluid in terms of pressure, flow rate, and flow dynamics. The fluid takes air vortex, water vortex, and water-air combined vortex as the vortex operation form, with vorticity as the main energy. In the form of gas vortex, water vortex, and water-vapor combined vortex, the vorticity is transmitted to the gas gas in the free state and the adsorbed state, and the vortex motion is performed together. The energy decreases, overflows continuously and is diluted and discharged with the main wind flow. The water-gas vortex fluid flows through the multiphase flow continuously, and the gas content in the upper corner is getting lower and lower. Because the multiphase water-gas vortex fluid occupies the entire upper corner space , because the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the gas diffusion of the working face, there will be no gas accumulation in the upper corner space, avoiding the occurrence of malignant events caused by the uncontrolled gas in the upper corner, and the application prospect and significance are very important. major. The invention is simple, reliable, easy to operate, capable of being timely, reliable, thorough and efficient, and does not cause secondary pollution.

Description of drawings

Fig. 1 is a schematic diagram of the application of the device for controlling gas in the upper corner of coal mines based on water-gas vortex fluid

1. Pressure water circuit 2. Pressure gas circuit 3. Intelligent controller 4. Air-water vortex generator 5. Fixed support 6. Wind flow guide overflow baffle 7. Upper corner 8. Goaf

9. Coal wall of working face 10. Coal working face 11. Main air flow 12. Roof

13. Bottom plate.

Detailed ways:

Embodiment 1

A device for controlling gas in the upper corner of coal mines based on water and gas vortex fluid, the device is composed of a pressure water circuit 1, a pressure gas circuit 2, an intelligent controller 3, a gas-water vortex generating device 4, a fixed support 5, and a wind flow guide overflow folding. The flow plate 6, the upper corner 7, the goaf 8, the working face coal wall 9, the coal mining working face 10, the main air flow 11, the top plate 12 and the bottom plate 13 are composed of the pressure water channel 1 and the pressure gas channel 2 as gas-water atomization The power source of the device, their working pressure range is 0.6Mpa, and the volume ratio is 1:0.05. The gas-water vortex generator 4 is respectively connected to the pressure water circuit 1 and the pressure gas circuit 2 through the intelligent controller 3, and the fixed support 5 supports Between the top plate 12 and the bottom plate 13, the fixed column 5 is arranged separately, the fixed column 5 is arranged in the upper area of the upper corner 7, and the gas-water vortex generating device 4 is fixed on the side of the upper part of the fixed column 5 close to the upper corner 7, The air-water atomized vortex fluid is ejected toward the top plate 12 at an upward inclination angle of 45 degrees, and the wind flow guide overflow baffle 6 is installed on the fixed support 5 toward the coal wall 9 side of the working face along the flow direction of the main wind flow 11 .

The above-mentioned application method for controlling gas in the upper corner of coal mines based on water-gas vortex fluid:

Ⅰ First, install the fixed column 5 in the working surface and support it between the top plate 12 and the bottom plate 13. The fixed column 5 is arranged separately. The fixed column 5 is arranged in the upper area of the upper corner 7, and the upper part of the fixed column 5 is close to the upper corner 7. The gas-water vortex generator 4 is fixed on one side, so that it can spray gas-water atomized vortex fluid to the position of the top plate 12 at an upward inclination angle of 45 degrees, and the fixed support 5 faces the coal wall 9 side of the working face along the main wind flow 11 Install the wind flow guide overflow baffle 6 in the flow direction;

Ⅱ After installation, press to open the pressure water and pressure air to the pressure water circuit 1 and the pressure air circuit 2 respectively. Under the control of the intelligent controller 3, the pressure water and the pressure air enter the air-water vortex generating device 4, and when the air-water vortex occurs The outlet of the device 4 sprays the water-air vortex fluid to the top plate 12. According to the distance between the gas-water vortex generating device 4 and the top plate 12 and the volume of the upper corner 7, the intelligent controller 3 controls the pressure and flow of the pressurized water and the pressurized air. To generate air vortex, water vortex, water vapor combined vortex fluid;

Ⅲ The gas vortex, water vortex and water-gas combined vortex generated by II are first combined with gas to form a gas vortex through energy transfer. The wind flow guides the overflow baffle 6 at the joint, and the first function of the wind flow guide and overflow baffle 6 is to make the main wind flow 11 with gas flow in the direction of the main wind flow 11 after flushing the coal mining face 10, so that the air diffused in the goaf 8 flows. The turbid wind can also smoothly enter the flow direction of the main wind flow 11 through the upper corner 7, and the second function of the wind flow guide overflow baffle 6 is to make the continuous vortex flow so that the gas in the upper corner of the coal mine overflows into the main wind flow 11 for dilution and discharge. Secondly, be filled in the upper corner 7 by the vortex fluid flow, because the vortex fluid continuously flows and the wind flow guides the overflow baffle 6 guiding effect, the wind flow guides the overflow baffle 6 close to the vortex on the upper corner 7 side The kinetic energy of the fluid flow is greater than the energy of the main wind flow 11 on the side of the wind flow guiding the overflow baffle 6 close to the coal wall 9 of the working face, so that the limited space of the upper corner 7 does not generate gas accumulation; as the gas is combined with the main wind flow 11, And flow together with the main wind flow 11, so that the gas can be safely discharged in a gaseous manner;

The gas vortex is formed by the combination of gas vortex, water vortex, water-gas combined vortex and gas. The gas vortex runs to the joint with the main wind flow 11 and the wind flow is guided to the overflow baffle 6. The gas vortex is combined with the main wind flow 11 to form a gas vortex. The minerals in the space are combined and flow together with the minerals in the main wind flow 11, so that the gas can be safely discharged by combining with solids; the water-air vortex is combined with the gas through the air vortex, water vortex, and water-vapor combined vortex. A gas vortex is formed, and the gas vortex runs until the wind flow guides the overflow baffle 6 with the flow direction of the main wind flow 11. The gas vortex is combined with the liquid material in the main wind flow 11 and flows together with the liquid material in the main wind flow 11. In this way, the gas can be safely discharged by combining with the liquid; through the continuous flow of the multiphase water-gas vortex fluid, the gas content in the upper corner 7 is getting lower and lower, because the multiphase water-gas vortex fluid occupies the entire upper corner. 7 space, since the kinetic energy of the water-gas vortex fluid diffused outward is greater than the kinetic energy of the gas diffused in the upper corner 7 of the working face, there will be no gas accumulation in the upper corner 7 space;

Ⅳ As the working face is pushed forward, first install a new fixed pillar 5 in the space of the upper corner 7 to be expanded to be supported between the top plate 12 and the bottom plate 13. The fixed pillar 5 is arranged separately, and the fixed pillar 5 is arranged in the upper corner. 7. In the upper area, fix the new air-water vortex generator 4 on the upper part of the new fixed pillar 5 near the upper corner 7, so that it can spray air and water mist to the new position of the top plate 12 at an upward inclination angle of 45 degrees. To remove the vortex fluid, install a new wind flow guide overflow baffle 6 on the side of the new fixed support 5 facing the coal wall 9 of the working face along the flow direction of the main wind flow 11. The air outlet water atomizes the vortex fluid, so that the vortex fluid can satisfy the continuous flow of the multiphase water-gas vortex fluid, and the gas content in the upper corner is getting lower and lower, and the multiphase water-gas vortex fluid occupies the entire upper corner. In the corner 7 space, the kinetic energy of the water-air vortex fluid diffusing outward is greater than the kinetic energy of the gas diffused in the upper corner 7 of the working face, and there will be no gas accumulation in the upper corner 7 space; then the intelligent controller 3 turns off the old gas-water vortex. Generating device 4 pressurized water and pressurized gas, cut off the air-water vortex generating device 4 on the old fixed pillar 5 and the old wind flow guide overflow baffle 6, so that the new upper corner 7 can be pushed together with the working face , the cycle reciprocates; through the continuous flow of the water-gas vortex fluid in the multi-phase flow, the gas content in the new upper corner 7 is getting lower and lower, because the multi-phase water-gas vortex fluid occupies the entire upper corner 7 space, and the water gas The kinetic energy of the vortex fluid diffusing outward is greater than the kinetic energy diffusing the gas in the upper corner 7 of the working face, so there will be no gas accumulation in the upper corner 7 space, thus avoiding the occurrence of malignant events caused by the gas out of control in the upper corner 7.

The fixed column 5 is arranged in the upper area of the upper corner 7, the fixed column 5 is supported between the top plate 12 and the bottom plate 13, and the gas-water vortex generator 4 is fixed on the side of the upper part of the fixed column 5 close to the upper corner 7, so that it is The air-water atomized vortex fluid is sprayed to the top plate 12 in the upward inclination angle of 45 degrees, and the wind flow guide overflow baffle 6 is installed on the fixed support 5 toward the coal wall 9 side of the working face along the flow direction of the main wind flow 11 .

Embodiment 2

The working pressure is 0.2Mpa, the dosage volume ratio is 1:0.001, the fixed pillar 5 is arranged separately, and the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7, so that it is inclined upward at 30 degrees. The air-water atomized vortex fluid is sprayed toward the position of the top plate 12 in the direction, and the fixed support 5 is arranged in the middle of the upper corner 7, and the others are the same as in Embodiment 1.

Embodiment 3

The working pressure is 0.5Mpa, the dosage volume ratio is 1:0.03, the fixed pillar 5 is arranged separately, and the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7, so that it is inclined upward at 35 degrees. The air-water atomized vortex fluid is ejected toward the position of the top plate 12 in the direction, and the fixed support 5 is arranged at the lower part of the upper corner 7, and the others are the same as those of Embodiment 1.

Embodiment 4

The working pressure is 0.5Mpa, the dosage volume ratio is 1:0.03, the fixed pillars 5 are arranged in multiples, and the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7, so that it is upward at 35 degrees. The air-water atomized vortex fluid is ejected toward the top plate 12 in the inclination direction, and the fixed support 5 is arranged on the upper and lower parts of the upper corner 7, and the others are the same as in Embodiment 1.

Embodiment 5

The working pressure is 0.5Mpa, the dosage volume ratio is 1:0.02, the fixed pillars 5 are arranged in multiples, and the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7 so that it is upward at 45 degrees. The air-water atomized vortex fluid is ejected toward the top plate 12 in the inclination direction, and the fixed pillars 5 are respectively arranged on the upper, middle and lower parts of the upper corner 7, and the others are the same as those in Embodiment 1.

Embodiment 6

The working pressure is 0.5Mpa, the dosage volume ratio is 1:0.02, the fixed pillars 5 are arranged in multiples, and the gas-water vortex generator 4 is fixed on the upper part of the fixed pillar 5 near the upper corner 7 so that it is upward at 45 degrees. The air-water atomized vortex fluid is sprayed toward the top plate 12 in the inclination direction, and the fixed pillars 5 are respectively arranged in the middle and lower parts of the upper corner 7, and the others are the same as those in Embodiment 1.

Claims (1)

1. an application method of the device based on water-gas vortex fluid governance coal mine upper corner gas: the method is characterized in that: Ⅰ First, install the fixed pillars (5) in the working surface and support them between the top plate (12) and the bottom plate (13). (7) The upper area, the middle area, the lower area and the positions where they are combined with each other, fix the gas-water vortex generator (4) on the side of the upper part of the fixed pillar (5) close to the upper corner (7), so that it is The air-water atomized vortex fluid can be ejected from the position of the top plate (12) in the upward inclination angle of 30-45 degrees, and the fixed support (5) is installed along the main air flow (11) flow direction toward the coal wall (9) side of the working face. Wind flow guide overflow baffle (6); Ⅱ After installation, press to open the pressure water and pressure air to the pressure water circuit (1) and the pressure air circuit (2) respectively. Under the control of the intelligent controller (3), the pressure water and the pressure air enter the air-water vortex generating device (4). ), the water-air vortex fluid is sprayed to the top plate (12) at the outlet of the gas-water vortex generating device (4), according to the distance between the gas-water vortex generating device (4) and the top plate (12) and the upper corner (7) The intelligent controller (3) generates air vortex, water vortex, and water-air combined vortex fluid by controlling the pressure and flow of pressurized water and pressurized air; III The gas vortex, water vortex and combined water and gas vortex generated by II are first combined with gas to form a gas vortex through energy transfer. ) flow to the junction, that is, the wind flow is directed to the overflow baffle (6), and the first function of the wind flow to the overflow baffle (6) is to make the main wind flow (11) wash the coal mining face (10) and then combine with the gas vortex to bring the The main wind flow (11) with gas continues to flow along the main wind flow direction; the wind flow guides and overflows the baffle (6) The second function is that the air vortex, water vortex, and water-gas combined vortex make the goaf (8) diffuse. The turbid wind can also smoothly pass through the wind flow guide overflow baffle plate (6) in the upper corner (7) area and enter the flow direction of the main wind flow (11). The continuous vortex flow makes the gas in the upper corner of the coal mine continuously overflow into the main wind flow (11) for dilution and discharge; IV The vortex fluid flows continuously, and the vortex fluid fills the upper corner (7). With the continuous flow of the vortex fluid and the guiding effect of the wind flow guiding the overflow baffle (6), the wind flow guides the overflow baffle (6) close to The kinetic energy of the vortex fluid flow on the side of the upper corner (7) is greater than the energy of the main wind flow (11) on the side of the wind flow guiding and overflowing the baffle (6) close to the coal wall (9) of the working face, so that the upper corner (7) This limited space does not produce gas accumulation; as the gas is combined with the main wind flow (11) and flows with the main wind flow (11), the gas can be safely discharged in a gaseous manner; through gas vortex, water vortex, The gas vortex is combined with the gas to form a gas vortex. The gas vortex runs to the joint with the main wind flow (11) and the wind flow is directed to the overflow baffle (6). The gas vortex and the main wind flow (11) in the space. The minerals are combined and flow with the minerals in the main wind flow (11), so that the gas can be safely discharged by combining with solids; the water-air vortex is formed by the combination of gas vortex, water vortex, water-vapor combined vortex and gas. The gas vortex, the gas vortex runs to the joint with the main wind flow (11), the wind flow guides the overflow baffle (6), the gas vortex combines with the liquid in the main wind flow (11), and follows the main wind flow (11) ), the gas flows together with the liquid, so that the gas can be safely discharged by combining with the liquid; through the continuous flow of the water-gas vortex fluid in the multiphase flow, the gas content in the upper corner (7) is getting lower and lower. The vortex fluid occupies the entire upper corner (7) space. Since the kinetic energy of the water-gas vortex fluid diffusing outward is greater than the kinetic energy diffusing the gas at the working face to the upper corner (7), there will be no space in the upper corner (7). gas accumulation; Ⅴ As the working face is pushed forward, first install a new fixed pillar (5) in the space of the upper corner (7) to be expanded to be supported between the top plate (12) and the bottom plate (13). Arranged individually or in multiple arrangements, the fixed pillars (5) are arranged in the upper area, the middle area, the lower area of the upper corner (7) and the positions where they are combined with each other, and the upper part of the new fixed pillar (5) is close to the upper corner ( 7) Fix the new air-water vortex generator (4) on this side, so that it can spray the air-water atomized vortex fluid to the new position of the top plate (12) at an upward inclination angle of 30 degrees to 45 degrees. Install a new airflow guide overflow baffle (6) along the main airflow (11) flow direction of the fixed pillar (5) facing the coal wall (9) of the working face. The vortex fluid is atomized by the ejected gas and water, so that the vortex fluid can satisfy the continuous flow of the multiphase water gas vortex fluid. The gas content in the upper corner (7) is getting lower and lower, and the multiphase water gas vortex fluid occupies the In the entire upper corner (7) space, the outward diffusion kinetic energy of the water-gas vortex fluid is greater than the kinetic energy of the gas diffusion in the upper corner (7) of the working face, and there will be no gas accumulation in the upper corner (7) space; then the intelligent controller (3) Turn off the old air-water vortex generating device (4) pressurized water and pressure gas, and cut off the air-water vortex generating device (4) on the old fixed support (5) and the old wind flow guide overflow baffle Plate (6), so that the new upper corner (7) can be pushed along with the working face, and the cycle will reciprocate; is lower and lower, because the multiphase water-gas vortex fluid occupies the entire upper corner (7) space, and the kinetic energy of the water-gas vortex fluid diffusing outward is greater than the kinetic energy diffusing the gas at the upper corner (7) of the working face, so the upper corner There will be no gas accumulation in the corner (7) space, thus avoiding the occurrence of malignant events caused by the gas out of control in the upper corner (7).

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