CN108180034B - Application method for treating gas at upper corner of coal mine based on water-gas vortex fluid - Google Patents
Application method for treating gas at upper corner of coal mine based on water-gas vortex fluid Download PDFInfo
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- 239000012530 fluid Substances 0.000 title claims abstract description 97
- 239000003245 coal Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000009825 accumulation Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 10
- 239000011707 mineral Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 7
- 230000003211 malignant effect Effects 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 14
- 238000005065 mining Methods 0.000 claims description 5
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- 238000010790 dilution Methods 0.000 abstract description 4
- 239000012895 dilution Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 189
- 238000004880 explosion Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005553 drilling Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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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
Technical Field
The invention relates to an application method for treating gas at an upper corner of a coal mine based on a water vapor vortex fluid, which belongs to the technical field of fluid application, in particular to a multiphase flow water vapor vortex fluid which is formed by mixing two fluids with different physical properties of a liquid phase and a gas phase, so that the upper corner of the coal mine is filled with the fluid, and the gas at the upper corner of the coal mine overflows into a main wind flow to be diluted and discharged 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 gas accumulation in the space cannot be generated.
Background
The gas is harmful gas mainly comprising methane in a mine, mainly comprising coal bed gas, and sometimes independently comprising methane. The gas is colorless, tasteless, odorless, combustible or explosive, is insoluble in water, and has higher diffusivity than air. The gas is non-toxic, but in high concentration, suffocation can be caused. The occurrence of gas in coal seams is mainly in two states: the gas in the permeation space is mainly in a free gas state, namely free gas or free gas, and the gas in the state obeys an ideal gas state equation; the other is called adsorption gas, which is mainly adsorbed on the microporous surface of coal and inside the particles of coal, occupying vacancies in the structure of coal molecules or spaces between coal molecules.
The mine gas does not support combustion, but can be combusted and exploded when meeting fire after being mixed with air to a certain concentration. There are 3 fatal factors generated during gas explosion: explosive flames, explosive shock waves, and toxic and harmful gases. Gas explosion not only causes a great deal of casualties, but also can seriously destroy mine facilities and interrupt production. Mine gas explosion often causes secondary disasters such as coal dust explosion, mine fire, roadway collapse and roof caving.
The gas combustion and explosion must be caused by 3 conditions: methane with certain concentration, ignition source with certain temperature and enough oxygen.
The upper corner is the corner behind the return air crossheading and the mining face, and as the air flow brings gas from the working face to the return air crossheading, the gas is easy to accumulate on the upper face of the place, so that the gas in the place is easy to exceed the limit, and the gas concentration at the upper corner is the key point for monitoring the coal mine safety. The method is used for timely processing the locally accumulated gas, is important content of daily gas management of a mine, and is also key work for preventing gas explosion accidents and ensuring safe production; however, the contradiction between easy occurrence of gas accumulation and abnormal complexity and laggard treatment means of gas treatment is very prominent, as the name of the invention, namely a mining fracture zone gas extraction technical method based on kilometer directional drilling, with the application number of CN201710511319.4, a kilometer directional drilling machine is utilized to construct a plurality of kilometer directional drilling holes in a drill site on the return air side to the upper fracture zone of a goaf, so that the gas in the mining fracture zone is extracted, the problem of upper corner accumulation overrun can be effectively solved, and the method is obviously to miniaturize the accumulation problem and does not thoroughly solve the accumulation problem; as in the patent: the invention discloses a U-shaped ventilation working face goaf follow-up gas extraction method, and application number CN201710467143.7, wherein the method reduces gas sources in return air flow of an upper corner of a goaf stoping working face, improves gas extraction rate of the working face, achieves the effect of safe and efficient stoping by the aid of flow division of ventilation of the stoping working face, but cannot thoroughly solve the problem of gas accumulation, so that an application method which is simple and reliable, effectively and quickly discharges gas of the upper corner into main air flow in real time and ensures that gas accumulation is not generated in a limited space of the upper corner is urgently needed.
Disclosure of Invention
The invention discloses an application method for treating gas at an upper corner of a coal mine based on a water-gas vortex fluid, which aims to solve the problems in the prior art and cannot solve the problems, so that a multiphase-flow water-gas vortex fluid is formed by mixing two fluids with different physical properties of a liquid phase and a gas phase, the fluid is filled in the upper corner of the coal mine, and the gas at the upper corner of the coal mine 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, and the technical scheme of the application method is simple, reliable, easy to operate, timely, reliable, thorough and efficient, and can control the gas device at the upper corner of the coal mine by the water gas vortex fluid without causing secondary pollution, thereby avoiding the occurrence of a malignant event caused by the out-of-control upper corner gas.
The invention relates to a device for treating gas at an upper corner of a coal mine based on a water vapor vortex fluid, which is characterized in that two fluids with different physical properties of a liquid phase and a gas phase are mixed to generate a multiphase water vapor vortex fluid, so that the fluid is filled in the upper corner of the coal mine, and the gas at the upper corner of the coal mine overflows into a main wind flow to be diluted and discharged 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 to ensure that the space can not generate gas accumulation, the device consists of a pressure water path 1, a pressure gas path 2, an intelligent controller 3, an air-water vortex generating device 4, a fixed strut 5, an air flow guide overflow baffle plate 6, an upper corner 7, a goaf 8, a working face coal wall 9, a coal face 10, a main air flow 11, a top plate 12 and a bottom plate 13, the pressure water path 1 and the pressure gas path 2 are used as power sources of the air-water atomization device, the working pressure range of the pressure water path 1 and the pressure gas path 2 is 0.2-0.6Mpa, and the volume ratio of the dosage is 1: 0.05-0.001, the gas-water vortex generating device 4 is respectively connected with the pressure water path 1 and the pressure gas path 2 through the intelligent controller 3, the fixed support post 5 is supported between the top plate 12 and the bottom plate 13, the fixed support post 5 is divided into single arrangement or a plurality of arrangements, the fixed support post 5 is arranged at the upper region, the middle region and the lower region of the upper corner 7 and the position of the combination of the upper region, the gas-water vortex generating device 4 is fixed at the upper part of the fixed support post 5 close to the upper corner 7, so that the gas-water vortex generating device can spray gas-water atomized vortex fluid to the top plate 12 in the upward inclination angle direction of 30-45 degrees, and the fixed support post 5 is provided with a wind flow guide overflow baffle plate 6 towards the working face coal.
The application method for treating the gas at the upper corner of the coal mine based on the water-gas vortex fluid comprises the following steps:
firstly, a fixed support 5 is arranged in a working face and supported between a top plate 12 and a bottom plate 13, the fixed support 5 is arranged independently or in a plurality of arrangements, the fixed support 5 is arranged in the upper area, the middle area and the lower area of an upper corner 7 and the position of the combination of the upper area, the middle area and the lower area, an air-water vortex generating device 4 is fixed on the upper part of the fixed support 5 close to the upper corner 7, the air-water atomized vortex fluid can be sprayed to the top plate 12 at an upward inclination angle of 30-45 degrees, and an air flow guide overflow baffle plate 6 is arranged on the side, facing a coal wall 9 of the working face, of the fixed support 5 along the flow direction of a.
After the intelligent controller 3 is installed, pressure water and pressure air are respectively communicated with the pressure water path 1 and the pressure gas path 2, the pressure water and the pressure air enter the air-water vortex generating device 4 under the control of the intelligent controller 3, water-gas vortex fluid is sprayed to the top plate 12 from the outlet of the air-water vortex generating device 4, and the intelligent controller 3 generates the air vortex, the water vortex and the water-gas combined vortex fluid by controlling the pressure and the flow of the pressure water and the pressure air according to the distance between the air-water vortex generating device 4 and the top plate 12 and the volume of the upper corner 7.
III gas vortex, water vortex and water-gas combined vortex generated by II are firstly combined with gas in an energy transfer mode to form gas vortex, the gas vortex moves to a joint where the gas vortex flows towards the main airflow 11 under the action of generation of step-by-step gas vortex, the airflow is guided to an overflow baffle plate 6, the airflow is guided to the overflow baffle plate 6, the first action of the airflow is to enable the main airflow 11 with gas to flow towards the coal face 10 after the main airflow 11 washes the coal face, so that the turbid wind diffused in the goaf 8 can smoothly enter the main airflow 11 through an upper corner 7, and the second action of the airflow is to enable the gas at the upper corner of the coal mine to overflow to the main airflow 11 for dilution and discharge; secondly, the vortex fluid flows to fill the upper corner 7, and due to the continuous and continuous flowing of the vortex fluid and the guiding action of the wind flow to the overflow baffle plate 6, the flowing kinetic energy of the vortex fluid on the side, close to the upper corner 7, of the wind flow guide overflow baffle plate 6 is greater than the energy of the main wind flow 11 on the side, close to the coal wall 9 of the working face, of the wind flow guide overflow baffle plate 6, so that the limited space of the upper corner 7 does not generate a gas accumulation phenomenon; the gas is combined with the main wind flow 11 and flows together with the main wind flow 11, so that the gas is safely discharged in a gaseous state;
gas vortex is formed by combining gas vortex, water-gas combined vortex and gas, the gas vortex moves to a wind flow guide overflow baffle plate 6 at the joint of the gas vortex and the main wind flow 11, the gas vortex is combined with minerals in the space of the main wind flow 11 and flows together with the minerals in the main wind flow 11, and therefore the gas is safely discharged in a mode of being combined with solid matters; the gas vortex is combined with gas through the gas vortex, the water-gas combined vortex and the gas to form a gas vortex, the gas vortex moves to a wind flow guide overflow baffle plate 6 at the joint of the gas vortex and the main wind flow 11, the gas vortex is combined with liquid in the main wind flow 11 and flows along with the liquid in the main wind flow 11, and therefore the gas is safely discharged in a mode of being combined with the liquid;
the multiphase flow water-gas vortex fluid continuously flows, the content of 7 gas at the upper corner is lower and lower, the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner 7, and the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the gas on the working surface diffused to the upper corner 7, so that the gas is not accumulated in the space of the upper corner 7;
IV, pushing forwards along with the working face, firstly installing a new fixing support 5 in the space of an expanded upper corner 7 and supporting between a top plate 12 and a bottom plate 13, wherein the fixing support 5 is arranged independently or in a plurality of arrangements, the fixing support 5 is arranged in the upper area, the middle area and the lower area of the upper corner 7 and the position of the combination of the upper area, the middle area and the lower area of the upper corner 7, fixing a new air-water vortex generating device 4 on the upper side of the new fixing support 5 close to the upper corner 7 so that the new air-water vortex generating device can spray air-water atomized vortex fluid to the new position of the top plate 12 in the upward inclination angle direction of 30-45 degrees, installing a new air flow guide overflow baffle plate 6 on one side of the coal wall 9 of the working face along the flow direction of the main air flow 11, starting to spray the air-water atomized vortex fluid after the installation is switched on in the mode I so that the air-water-, the content of gas at the upper corner 7 is lower and lower, multiphase flow water-gas vortex fluid occupies the whole space of the upper corner 7, the kinetic energy of the water-gas vortex fluid diffused outwards is greater than that of the gas on the working surface diffused towards the upper corner 7, and the space of the upper corner 7 cannot be accumulated with gas; then the intelligent controller 3 turns off the pressure water and the pressure air of the old air-water vortex generating device 4, cuts off the air-water vortex generating device 4 on the old fixed strut 5 and the old air flow guide overflow baffle plate 6, so that the new upper corner 7 can be pushed along with the working surface, thereby the circulation is repeated; the multiphase flow water-gas vortex fluid continuously flows, the content of new upper corner 7 gas is lower and lower, and the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner 7, and the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the gas of the working surface diffused to the upper corner 7, so that the gas is not accumulated in the space of the upper corner 7, and the malignant event caused by the out-of-control gas of the upper corner 7 is avoided.
The invention relates to an application method for treating gas at upper corners of coal mines based on water-gas vortex fluid, which has the advantages that two fluids with completely different physical properties of liquid phase and gas phase are mixed to generate controllable multiphase flow water-gas vortex which is completely different from the original fluid form in the aspects of density, pressure, flow rate, flow state and the like, the fluid takes gas vortex, water vortex and water-gas combined vortex as vortex operation forms, vortex quantity is taken as a main energy form, the vortex quantity is transmitted to gas in a free state and a suction state through the gas vortex, the water vortex and the water-gas combined vortex to carry out vortex motion together, the gas which carries out vortex motion at the joint of main wind flow decreases along with the vortex quantity energy, continuously overflows and runs, is diluted and discharged along with the main wind flow, the multiphase flow water-gas vortex fluid continuously flows, the content of gas at the upper corners is lower and lower, and the multiphase flow water-gas vortex fluid occupies the whole 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 on the working surface, gas cannot be accumulated in the upper corner space, the occurrence of a malignant event caused by the fact that the gas at the upper corner is out of control is avoided, and the application prospect and the significance are very important. The method is simple, reliable, easy to operate, reliable, thorough and efficient in time, and does not cause secondary pollution.
Drawings
FIG. 1 is a schematic diagram of an application of a device for treating gas at upper corners of coal mines based on water vapor vortex fluid
1. A pressure water path 2, a pressure gas path 3, an intelligent controller 4, a gas-water vortex generating device 5, a fixed strut 6, an air flow guide overflow baffle 7, an upper corner 8 and a goaf
9. Working face coal wall 10, coal face 11, main airflow 12 and top plate
13. A base plate.
The specific implementation mode is as follows:
A device for treating gas at upper corners of coal mines based on water-gas vortex fluid is composed of a pressure water path 1, a pressure gas path 2, an intelligent controller 3, a gas-water vortex generating device 4, a fixed support 5, a wind flow guide overflow baffle plate 6, an upper corner 7, a goaf 8, a working face coal wall 9, a coal mining working face 10, a main wind flow 11, a top plate 12 and a bottom plate 13, wherein the pressure water path 1 and the pressure gas path 2 are used as power sources of a gas-water atomizing device, the working pressure range of the pressure water path 1 and the pressure gas path 2 is 0.6Mpa, and the volume ratio of dosage to volume is 1: 0.05, the gas-water vortex generating device 4 is respectively connected with the pressure water path 1 and the pressure gas path 2 through the intelligent controller 3, the fixed support post 5 is supported between the top plate 12 and the bottom plate 13, the fixed support post 5 is independently arranged, the fixed support post 5 is arranged at the upper part of the upper corner 7, the gas-water vortex generating device 4 is fixed at the upper part of the fixed support post 5 close to the upper corner 7, so that gas-water atomized vortex fluid is sprayed to the position of the top plate 12 in the upward inclination angle direction of 45 degrees, and the fixed support post 5 is provided with a wind flow guide overflow baffle plate 6 towards the side of the coal wall 9 of the working face along the flow direction of the.
The application method for treating the gas at the upper corner of the coal mine based on the water-gas vortex fluid comprises the following steps:
firstly, mounting a fixed support post 5 in a working face and supporting the fixed support post 5 between a top plate 12 and a bottom plate 13, wherein the fixed support post 5 is independently arranged, the fixed support post 5 is arranged at the upper part of an upper corner 7, an air-water vortex generating device 4 is fixed at the upper part of the fixed support post 5 close to the upper corner 7, so that the air-water atomized vortex generating device can spray air-water atomized vortex fluid to the position of the top plate 12 in the upward inclination angle direction of 45 degrees, and an air flow guide overflow baffle plate 6 is mounted at one side of the fixed support post 5 facing a coal wall 9 of the working face along the;
II, after being installed, pressure water and pressure air are respectively communicated with a pressure water path 1 and a pressure gas path 2, the pressure water and the pressure air enter an air-water vortex generating device 4 under the control of an intelligent controller 3, a water-gas vortex fluid is sprayed to a top plate 12 from an outlet of the air-water vortex generating device 4, and the intelligent controller 3 generates the air vortex, the water vortex and the water-gas combined vortex fluid by controlling the pressure and the flow of the pressure water and the pressure air according to the distance between the air-water vortex generating device 4 and the top plate 12 and the volume of an upper corner 7;
III gas vortex, water vortex and water-gas combined vortex generated by II are firstly combined with gas in an energy transfer mode to form gas vortex, the gas vortex moves to a joint where the gas vortex flows towards the main airflow 11 under the action of generation of step-by-step gas vortex, the airflow is guided to an overflow baffle plate 6, the airflow is guided to the overflow baffle plate 6, the first action of the airflow is to enable the main airflow 11 with gas to flow towards the coal face 10 after the main airflow 11 washes the coal face, so that the turbid wind diffused in the goaf 8 can smoothly enter the main airflow 11 through an upper corner 7, and the second action of the airflow is to enable the gas at the upper corner of the coal mine to overflow to the main airflow 11 for dilution and discharge; secondly, the vortex fluid flows to fill the upper corner 7, and due to the continuous and continuous flowing of the vortex fluid and the guiding action of the wind flow to the overflow baffle plate 6, the flowing kinetic energy of the vortex fluid on the side, close to the upper corner 7, of the wind flow guide overflow baffle plate 6 is greater than the energy of the main wind flow 11 on the side, close to the coal wall 9 of the working face, of the wind flow guide overflow baffle plate 6, so that the limited space of the upper corner 7 does not generate a gas accumulation phenomenon; the gas is combined with the main wind flow 11 and flows together with the main wind flow 11, so that the gas is safely discharged in a gaseous state;
gas vortex is formed by combining gas vortex, water-gas combined vortex and gas, the gas vortex moves to a wind flow guide overflow baffle plate 6 at the joint of the gas vortex and the main wind flow 11, the gas vortex is combined with minerals in the space of the main wind flow 11 and flows together with the minerals in the main wind flow 11, and therefore the gas is safely discharged in a mode of being combined with solid matters; the gas vortex is combined with gas through the gas vortex, the water-gas combined vortex and the gas to form a gas vortex, the gas vortex moves to a wind flow guide overflow baffle plate 6 at the joint of the gas vortex and the main wind flow 11, the gas vortex is combined with liquid in the main wind flow 11 and flows along with the liquid in the main wind flow 11, and therefore the gas is safely discharged in a mode of being combined with the liquid; the multiphase flow water-gas vortex fluid continuously flows, the content of 7 gas at the upper corner is lower and lower, the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner 7, and the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the gas on the working surface diffused to the upper corner 7, so that the gas is not accumulated in the space of the upper corner 7;
IV, pushing forwards along with the working face, firstly installing a new fixing support 5 in the space of an expanded upper corner 7 and supporting between a top plate 12 and a bottom plate 13, wherein the fixing support 5 is arranged independently, the fixing support 5 is arranged in the upper area of the upper corner 7, fixing a new air-water vortex generating device 4 on the upper part of the new fixing support 5 close to the upper corner 7 so that the new air-water vortex generating device can spray air-water atomized vortex fluid to the new position of the top plate 12 in the direction of an upward inclination angle of 45 degrees, installing a new air flow guide overflow baffle plate 6 on the side, facing to the coal wall 9 of the working face, of the new fixing support 5 along the flow direction of the main air flow 11, starting to spray the air-water atomized vortex fluid after the installation is connected in the mode I, and enabling the vortex fluid to meet the continuous flow of multiphase flow water-water vortex fluid, wherein the gas content of the upper corner 7 is lower and lower, and the multiphase flow vortex fluid occupies the, the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the diffusion of the gas on the working surface to the upper corner 7, and the gas cannot be accumulated in the space of the upper corner 7; then the intelligent controller 3 turns off the pressure water and the pressure air of the old air-water vortex generating device 4, cuts off the air-water vortex generating device 4 on the old fixed strut 5 and the old air flow guide overflow baffle plate 6, so that the new upper corner 7 can be pushed along with the working surface, thereby the circulation is repeated; the multiphase flow water-gas vortex fluid continuously flows, the content of new upper corner 7 gas is lower and lower, and the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner 7, and the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the gas of the working surface diffused to the upper corner 7, so that the gas is not accumulated in the space of the upper corner 7, and the malignant event caused by the out-of-control gas of the upper corner 7 is avoided.
The fixed support 5 is arranged at the upper region of the upper corner 7, the fixed support 5 is supported between the top plate 12 and the bottom plate 13, the gas-water vortex generating device 4 is fixed at the upper part of the fixed support 5 close to the upper corner 7, so that the gas-water atomized vortex fluid is sprayed to the position of the top plate 12 in the upward inclination direction of 45 degrees, and the fixed support 5 is provided with an airflow guide overflow baffle plate 6 towards the coal wall 9 side of the working face along the flowing direction of the main airflow 11.
The working pressure is 0.2Mpa, the volume ratio of dosage is 1: 0.001, the fixed support 5 is independently arranged, the gas-water vortex generating device 4 is fixed on the upper part of the fixed support 5 near the upper corner 7, so that the gas-water vortex generating device sprays gas-water atomized vortex fluid to the top plate 12 position in the upward inclination angle direction of 30 degrees, the fixed support 5 is arranged in the middle of the upper corner 7, and the other steps are the same as those of the embodiment 1.
The working pressure is 0.5Mpa, the volume ratio of dosage is 1: 0.03, the fixed support 5 is independently arranged, the gas-water vortex generating device 4 is fixed on the upper part of the fixed support 5 near the upper corner 7, so that the gas-water atomized vortex fluid is sprayed to the top plate 12 position at an upward inclination angle of 35 degrees, the fixed support 5 is arranged at the lower part of the upper corner 7, and the other steps are the same as those of embodiment 1.
The working pressure is 0.5Mpa, the volume ratio of dosage is 1: 0.03, a plurality of fixed struts 5 are arranged, the gas-water vortex generating device 4 is fixed on the upper portion of the fixed strut 5 near the upper corner 7 so as to spray gas-water atomized vortex fluid toward the top plate 12 at an upward inclination angle of 35 degrees, the fixed struts 5 are arranged on the upper portion and the lower portion of the upper corner 7, and the other is the same as embodiment 1.
The working pressure is 0.5Mpa, the volume ratio of dosage is 1: 0.02, a plurality of fixed struts 5 are arranged, the gas-water vortex generating device 4 is fixed on the upper portion of the fixed strut 5 near the upper corner 7 so as to spray gas-water atomized vortex fluid toward the top plate 12 at an upward inclination angle of 45 degrees, the fixed struts 5 are respectively arranged on the upper portion, the middle portion and the lower portion of the upper corner 7, and the other embodiment is the same as the embodiment 1.
The working pressure is 0.5Mpa, the volume ratio of dosage is 1: 0.02, a plurality of fixed struts 5 are arranged, the gas-water vortex generating device 4 is fixed on the upper part of the fixed strut 5 near the upper corner 7 so as to spray gas-water atomized vortex fluid to the top plate 12 at an upward inclination angle of 45 degrees, the fixed struts 5 are respectively arranged at the middle part and the lower part of the upper corner 7, and the other embodiment is the same as the embodiment 1.
Claims (1)
1. An application method of a device for treating gas at upper corners of coal mines based on water-gas vortex fluid comprises the following steps: the method is characterized in that:
firstly, mounting a fixed support post (5) in a working face and supporting the fixed support post between a top plate (12) and a bottom plate (13), wherein the fixed support post (5) is arranged independently or in a plurality of arrangements, the fixed support post (5) is arranged in the upper area, the middle area and the lower area of an upper corner (7) and the positions of the upper area, the middle area and the lower area of the upper corner (7) which are mutually combined, an air-water vortex generating device (4) is fixed on the upper side of the fixed support post (5) close to the upper corner (7) so as to spray air-water atomized vortex fluid to the position of the top plate (12) in an upward inclination angle direction of 30-45 degrees, and an air flow guide overflow baffle plate (6) is mounted on one side of a coal wall (9) of;
II, after being installed, pressure water and pressure air are respectively communicated with a pressure water path (1) and a pressure gas path (2), the pressure water and the pressure air enter an air-water vortex generating device (4) under the control of an intelligent controller (3), an outlet of the air-water vortex generating device (4) sprays water-gas vortex fluid to a top plate (12), and the intelligent controller (3) generates the air vortex, the water vortex and the water-gas combined vortex fluid by controlling the pressure and the flow of the pressure water and the pressure air according to the distance between the air-water vortex generating device (4) and the top plate (12) and the volume of an upper corner (7);
III, gas vortex, water vortex and water-gas combined vortex generated by II are combined with gas firstly in an energy transfer mode to form gas vortex, the gas vortex moves to the flow direction combination part with the main air flow (11) under the action of step-by-step gas vortex generation, namely the air flow is guided to overflow baffle plates (6), the air flow is guided to overflow baffle plates (6) to have the first action that the main air flow (11) is combined with the gas vortex after washing the coal mining working surface (10), and the main air flow (11) with the gas continuously flows along the main air flow direction; the second function of the air flow guiding overflow baffle plate (6) is that air vortex, water vortex and water-air combined vortex enable the turbid air diffused by the goaf (8) to smoothly pass through the upper corner (7) area, the air flow guiding overflow baffle plate (6) enters the main air flow (11) to flow, and therefore gas at the upper corner of the coal mine continuously overflows into the main air flow (11) to be diluted and discharged by means of the second function of the air flow guiding overflow baffle plate (6) and continuous vortex flow;
IV, the vortex fluid continuously flows, the vortex fluid is filled in the upper corner (7), and by means of the continuous flow of the vortex fluid and the guiding action of the air flow guiding overflow baffle plate (6), the flow kinetic energy of the vortex fluid on one side of the air flow guiding overflow baffle plate (6) close to the upper corner (7) is greater than the energy of the main air flow (11) on one side of the air flow guiding overflow baffle plate (6) close to the coal wall (9) of the working surface, so that the gas accumulation phenomenon is not generated in a limited space of the upper corner (7); the gas is combined with the main airflow (11) and flows together with the main airflow (11), so that the gas is safely discharged in a gaseous state; gas vortex is formed by combining gas vortex, water-gas combined vortex and gas, the gas vortex moves to a wind flow guide overflow baffle plate (6) at the joint of the gas vortex and the main wind flow (11), the gas vortex is combined with minerals in the space of the main wind flow (11) and flows together with the minerals in the main wind flow (11), and thus the gas is safely discharged in a mode of being combined with solid; the gas vortex is combined with gas through the gas vortex, the water-gas combined vortex and the gas to form a gas vortex, the gas vortex moves to a wind flow guide overflow baffle plate (6) at the joint of the gas vortex and the main wind flow (11), the gas vortex is combined with liquid in the main wind flow (11) and flows along with the liquid in the main wind flow (11), and therefore the gas is safely discharged in a mode of being combined with the liquid; the gas content of the upper corner (7) is lower and lower by the continuous flowing of the multiphase flow water-gas vortex fluid, and the gas is not accumulated in the space of the upper corner (7) because the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner (7) and the kinetic energy of the outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of the diffusion of the gas on the working surface to the upper corner (7);
v, pushing forwards along with the working face, firstly installing a new fixed support post (5) in the space of an expanded upper corner (7) and supporting the new fixed support post between a top plate (12) and a bottom plate (13), wherein the fixed support posts (5) are arranged independently or in a plurality of arrangements, the fixed support posts (5) are arranged in the upper area, the middle area and the lower area of the upper corner (7) and the positions of the combination of the upper area, the middle area and the lower area of the upper corner (7), fixing a new air-water vortex generating device (4) on the upper side of the new fixed support post (5) close to the upper corner (7) so that the new air-water vortex generating device can spray air-water atomized vortex fluid to the new position of the top plate (12) in the upward inclination angle direction of 30-45 degrees, installing a new air flow guide overflow baffle plate (6) on one side of a coal wall (9) of the working face along the flowing direction of a main air flow (11), starting to spray the air, the vortex fluid can meet the condition that multiphase flow water-gas vortex fluid continuously flows, the gas content of an upper corner (7) is lower and lower, the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner (7), the kinetic energy of outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of diffusion of the gas on a working surface to the upper corner (7), and the gas cannot be accumulated in the space of the upper corner (7); then the intelligent controller (3) turns off the pressure water and the pressure air of the old air-water vortex generating device (4), cuts off the air-water vortex generating device (4) on the old fixed strut (5) and the old air flow guide overflow baffle plate (6), so that the new upper corner (7) can be pushed along with the working surface, and the cycle is repeated; the multiphase flow water-gas vortex fluid continuously flows, the content of new gas at the upper corner (7) is lower and lower, and the multiphase flow water-gas vortex fluid occupies the whole space of the upper corner (7), and the kinetic energy of outward diffusion of the water-gas vortex fluid is greater than the kinetic energy of diffusion of gas on the working surface to the upper corner (7), so that the gas cannot be accumulated in the space of the upper corner (7), and the occurrence of a malignant event caused by the fact that the gas at the upper corner (7) is out of control is avoided.
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| CN106894827A (en) * | 2017-03-28 | 2017-06-27 | 安徽理工大学 | The method that gas is prevented and treated during coal face back production |
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| CN205743984U (en) * | 2016-04-24 | 2016-11-30 | 新疆维吾尔自治区煤炭科学研究所 | A kind of stope working surface of coal mines gas at upper corner automatic extraction system |
| CN205743985U (en) * | 2016-06-29 | 2016-11-30 | 山西霍尔辛赫煤业有限责任公司 | Upper corner gas pumping and discharging device |
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