CN218030256U - Visual analogue means of longwall working face end suspended ceiling wind current - Google Patents
Visual analogue means of longwall working face end suspended ceiling wind current Download PDFInfo
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- CN218030256U CN218030256U CN202222278366.8U CN202222278366U CN218030256U CN 218030256 U CN218030256 U CN 218030256U CN 202222278366 U CN202222278366 U CN 202222278366U CN 218030256 U CN218030256 U CN 218030256U
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Abstract
The utility model belongs to the technical field of coal mine working face safety mining, and discloses a visual simulation device for longwall working face end suspended ceiling wind current, which comprises a coal seam simulation structure, a supporting structure, a goaf gangue simulation structure, an end suspended ceiling structure, a roadway simulation device, a gas generation device, a suction fan, a data acquisition device and a computer arranged outside the device; the utility model can be disassembled, assembled and conveniently and quickly used for simulating the suspended roofs with different sizes by the similar ratio real reduction end suspended roof; under different coal seam geological conditions, the device can simulate a shallow-buried near-horizontal coal seam and simulate waste rocks in a goaf; the device can simulate the change rule of the wind flow, and is convenient to observe and analyze; the device can collect parameters such as wind speed and wind pressure and monitor the gas concentration; the transparent box body that the device used can realize visual show, conveniently observes the experimental result.
Description
Technical Field
The utility model belongs to the technical field of colliery working face safety mining, specifically a visual analogue means of longwall working face tip suspended ceiling wind current.
Background
Along with the improvement of the mine productivity and the mining mechanization degree, the supporting strength and the supporting level of a mine roadway are increased, most of the working face roadways are supported by using anchor rods, anchor cables, net sheets and steel beams, the control of a roadway top plate is very stable, but the two ends of the working face are difficult to collapse after the working face is pushed, so that the end of the working face is suspended; the end suspended ceiling is the phenomenon that a top plate cannot collapse in time along with the advancing of a working face in a certain area of an upper end and a lower end of the working face during normal stoping.
Based on the research of the Shendong mining area fully-mechanized mining face end suspended ceiling treatment practice, the method finds that: large area of triangular area of fully mechanized mining face (suspended roof area is generally larger than 30 m) 2 ) The suspended roof easily causes gas accumulation in the goaf, and when the top plate of the triangular area at the end head collapses in a large area, toxic and harmful gas accumulated in the goaf instantly gushes out to reduce the oxygen concentration at the end head, so that the safety of operators at the end head is directly threatened; in addition, because the two ends have more float coals, the coal is easy to be spontaneously combusted due to long-term air leakage in the gob under the suspended roof state, and the residual coal and the overlying rock stratum in the gob are considered as porous media, and the air flow and the residual coal can be subjected to oxidation reaction in the seepage process of the porous media and can consume oxygen; therefore, it is highly desirable to develop a study of the effect of the work surface end ceiling on ventilation.
The existing mine model basically ignores the influence of a head overhang at the goaf when simulating a working face and the goaf, particularly in the aspects of monitoring wind speed, wind volume, wind pressure and gas concentration; therefore, the utility model provides a visual analogue means of longwall working face end suspended ceiling wind current to it is very necessary to realize different mining conditions and different working face end suspended ceiling size to the monitoring simulation and the influence analysis of wind current parameter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above problem, provide a visual analogue means of longwall working face end overhang top wind current, have convenient to detach equipment and the different exploitation condition of observation and analysis and the advantage of different working face end overhang size to wind flow parameters such as wind speed, amount of wind, wind pressure and gas concentration influence.
In order to achieve the above purpose, the utility model provides a following technical scheme: a visual simulation device for the end suspended ceiling airflow of a long-wall working surface comprises a coal seam simulation structure, a supporting structure, a goaf gangue simulation structure, an end suspended ceiling structure, a roadway simulation device, a gas generation device, a suction fan, a data acquisition device and a computer arranged outside the device, wherein:
the coal bed simulation structure is a transparent box body formed by assembling, and is used for simulating a geometric structure of an actual coal bed, the supporting structure is arranged in the transparent box body, the transparent box body is divided into a coal bed working surface and a goaf waste rock simulation structure, a plurality of detection preformed holes are uniformly arranged in the goaf waste rock simulation structure, namely, round holes for detecting air flow data are reserved on a model, the air flow data at key points in the device are collected, an end suspended ceiling structure is of an arc structure and is arranged at the upper end and the lower end of a roadway simulation device, the upper end suspended ceiling and the lower end suspended ceiling of a long-wall working surface are simulated, a gas generating device is connected to an air inlet of the roadway simulation device through a ventilation pipeline, the gas generating device is used for providing smoke for the model to simulate various gases so as to monitor gas concentration, a suction fan is connected to an air outlet of the roadway simulation device through the ventilation pipeline, a draw-out ventilation mode is formed, an air door is arranged on the roadway simulation device, the air door can be used for simulating air volume changes of different ventilation conditions by adjusting the opening degree of the air door, the detection device is arranged at the position close to a detection end of the detection device, the detection end of the insertion connection device is used for displaying data when the data collection device, and the data collection device is not used for researching the data collection device, and the data collection device.
After the device is assembled according to the structure, a gas generating device and a suction fan are started, smoke produced by the gas generating device enters a goaf waste rock simulation structure through a ventilation pipeline and a roadway simulation device, then the smoke comes out of the goaf waste rock simulation structure and enters the roadway simulation device and a ventilation pipeline to form a suction type ventilation system, a data acquisition device acquires air flow data at detection reserved holes in the goaf waste rock simulation structure and the ventilation pipeline and transmits the air flow data to a display screen of a computer for visualization, and the flowing condition of gas in the device is observed through a transparent box body of a coal bed simulation structure; in the simulation experiment, the opening degree of air doors at all positions of the roadway simulation device is adjusted, the arc size of the end suspended ceiling structure is modified, and monitoring simulation and influence analysis of air flow and gas concentration are simulated under different mining conditions and different working face end suspended ceiling sizes of the simulated roadway.
As a preferred technical scheme of the utility model, tunnel analogue means is two seal chamber who advances once, including lieing in bearing structure with the gluey fortune tunnel of one side, assisting fortune tunnel and return air tunnel.
It is specific, the air inlet end in fortune tunnel of gluing is connected with gaseous generating device through air pipe, the air-out end in fortune tunnel of gluing sets up in the goaf waste rock analogue structure's the goaf filling area and links to each other with bearing structure, the air inlet end in assistance fortune tunnel is connected with gaseous generating device through air pipe, the intercommunication can be dismantled with fortune tunnel of gluing to the air-out end in assistance fortune tunnel, the air inlet end in return air tunnel sets up in the goaf waste rock analogue structure's goaf filling area, the air-out end in return air tunnel is connected with suction fan through air pipe.
Specifically, the quantity of air door is 3, installs respectively on glue fortune tunnel, assistance transport tunnel and return air tunnel, simulates the different ventilation conditions in tunnel through adjusting the air door opening degree of gluing fortune tunnel, assistance transport tunnel and return air tunnel each department.
As the utility model discloses a preferred technical scheme, the fill in the collecting space filling area of collecting space area waste rock simulation structure is filled with the rubber mud piece that dries for the collecting space area collapse waste rock of simulation shape size difference, convenient for material collection, easy operation.
As a preferred technical scheme of the utility model, the box of coal seam analog structure is transparent ya keli board, and degree of oxidation resistance is good, sees through transparent box and can clearly see the gas concentration of the gas flow condition in order to estimate the device, the observation analysis of being convenient for.
As the utility model discloses an optimal technical scheme, data acquisition device includes air velocity transducer, wind pressure sensor and wind temperature sensor for detect tunnel analogue means and collecting space area waste rock analog structure's wind current parameter, be provided with the data processing model in the computer and be used for handling the wind current parameter that fan operating mode parameter and collection obtained, and carry out the analytic research of data display be convenient for through the display screen of computer, visual degree is high.
As a preferred technical scheme of the utility model, install the camera on the computer, can carry out the image record when the experiment, be convenient for experiment the back and carry out the data analysis that tests, observe the flue gas law that flows.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses a coal seam analogue structure is the transparent box of removable assecmbly, and collecting space area waste rock analogue structure's filler size and appearance rate can be adjusted according to the circumstances, and the circular arc structure of end suspended ceiling structure can be become by the little model of equidimension not, conveniently modifies its circular arc size so that the influence of different working face end suspended ceiling to gas concentration is analyzed, sets up a plurality of air doors on the tunnel analogue means, through the open degree simulation different exploitation ventilation conditions of air door regulation; the utility model has the advantages of simple structure, detachability, convenience and practicality; the utility model relates to a visual analogue means of longwall working face end suspended ceiling wind current can realize under the different mining conditions, the working face end suspended ceiling of different suspended ceiling sizes is to wind current parameter data's calculating, the monitoring simulation and the influence analysis of gas concentration simulate the different suspended ceiling areas in coal mine working face end, for the simulation of mine working face provides a new device, the simulation monitoring that makes working face end suspended ceiling department wind current is more accurate, moreover, the steam generator is simple in structure, therefore, the clothes hanger is strong in practicability, and is worth promoting.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the end suspended ceiling of the present invention;
FIG. 3 is a graph showing the results of a gas concentration simulation in the examples.
In the figure: 1. simulating a structure of the coal bed; 2. a support structure; 3. a goaf gangue simulation structure; 4. an end suspended ceiling structure; 5. a gas generating device; 6. a suction fan; 7. glue transportation roadway; 8. auxiliary transportation roadway; 9. a ventilation pipeline; 10. an air return roadway; 11. an air door; 12. detecting the preformed hole; 13. a data acquisition device; 14. a computer; 15. a camera is provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a visual analogue means of longwall working face end suspended ceiling wind current, including coal seam analogue structure 1, bearing structure 2, collecting space area waste rock analogue structure 3, end suspended ceiling structure 4, tunnel analogue means, gas generating device 5, suction fan 6, data acquisition device 13 and install at the outside computer 14 of device, tunnel analogue means is the seal chamber of two advances one time, including lieing in bearing structure 2 with the glue transportation tunnel 7 of one side, assist transportation tunnel 8 and return air tunnel 10, wherein:
the coal seam simulation structure 1 is an assembled transparent box body, preferably an acrylic plate, and is used for simulating a geometric structure of an actual coal seam, an empty filling area of a goaf gangue simulation structure 3 is filled with aired rubber mud blocks and used for simulating goaf caving gangue with different shapes and sizes, a support structure 2 is arranged in the transparent box body and divides the transparent box body into a coal seam working face and an empty filling area of the goaf gangue simulation structure 3, detection reserved holes 12 are uniformly arranged in the upper portion, the middle portion and the lower portion of the goaf gangue simulation structure 3, namely round holes capable of detecting air flow data are reserved in a model and used for collecting air flow data at point positions, as shown in fig. 2, an end head suspension structure 4 is of an arc structure, wherein the arc structure L1 simulates the width of a suspension top edge trend, L2 is the width of the suspension top edge trend, in the embodiment, L1= L2, the arc is a circle with the diameter of 1/4, and the end head suspension structure 4 is arranged at the upper end and the lower end of a roadway simulation device and used for simulating the upper and lower end heads of a long top suspension face of a long top wall;
the gas generating device 5 is connected to air inlets of the glue transportation roadway 7 and the auxiliary transportation roadway 8 through a ventilation pipeline 9 and used for providing various flue gas simulation gases for the model to monitor gas concentration, the suction fan 6 is connected to an air outlet of the air return roadway 10 through the ventilation pipeline 9, an air outlet end of the glue transportation roadway 7 is arranged in a goaf gangue simulation structure 3 goaf filling area and connected with the supporting structure 2, an air outlet end of the auxiliary transportation roadway 8 is detachably communicated with the glue transportation roadway 7, and an air inlet end of the air return roadway 10 is arranged in a goaf gangue simulation structure 3 filling area and connected with the supporting structure 2, so that a two-in one-back (U-shaped ventilation) extraction type ventilation mode is formed;
the number of the air doors 11 is 3, the air doors are respectively arranged on the glue transportation roadway 7, the auxiliary transportation roadway 8 and the return air roadway 10, and different ventilation conditions of the roadways are simulated by adjusting the opening degrees of the air doors 11 at the glue transportation roadway 7, the auxiliary transportation roadway 8 and the return air roadway 10;
the ventilation pipeline 9 is also provided with a detection preformed hole 12 at the position close to the gas generating device 5 and the suction fan 6, the detection end of the data acquisition device 13 is arranged at the detection preformed hole 12 on the ventilation pipeline 9 and the goaf gangue simulation structure 3, and is closed when not in use and opened when in use, so as to acquire the wind flow data at the key point of the device, the data transmission end of the data acquisition device 13 is inserted into the computer 14 outside the device, and the data acquisition device is convenient to display each parameter data on the computer 14 for subsequent research and analysis.
Wherein, a plurality of equipment of data acquisition device 13 are constituteed, including air velocity transducer, wind pressure sensor and wind temperature sensor for detect the air current parameter of glue transport tunnel 7, subsidiary transport tunnel 8, return air tunnel 10 and collecting space area waste rock analog structure 3, be provided with the air current parameter that the data processing model is used for obtaining fan operating mode parameter and collection in the computer 14 and handle, and carry out data display through the display screen of computer 14.
For better experimental simulation, install camera 15 on the computer 14, can carry out image record when the experiment, carry out the analysis of experimental data after being convenient for the experiment, observe the flue gas flow law.
The utility model discloses when carrying out the simulation, according to the air current parameter that measures on the spot, the shape size of adjustment coal seam analogue structure 1, goaf waste rock analogue structure 3's filler size and tolerance, the opening degree of a plurality of air doors 11 and the circular arc size of end suspended ceiling structure 4 on the tunnel analogue means, the air current parameter that makes analogue means's data acquisition device 13 gather carries out similar than true reduction with actual conditions, then the circular arc size and the air door 11 opening degree of adjustment end suspended ceiling structure 4, use southern Shaanxi province's family hillock colliery 15210 working face as the example, end suspended ceiling structure 4 takes actual dimensions 12X 12m to 24X 24m to convert to simulation dimension L1X L2 and gets 3X 3cm to 6X 6cm, the opening degree of adjustment air door 11 is 0, 60%, 80%, 100% is with the ventilation condition under the simulation different mining conditions, see through the high transparent ya keli board and obtain the upper and lower corner gas concentration change of end suspended ceiling structure 4, the result is as shown in figure 3, obtain through the analysis: when the wind shielding degree is below 80%, the gas concentrations of the lower corner of the air inlet side and the upper corner of the air return side are increased along with the increase of the size of the end head suspended ceiling structure 4; when the wind shielding degree of the working face end reaches 80%, the gas concentrations at the upper and lower corners of the end suspended ceiling structure 4 are kept substantially constant, and there is little correlation with the size of the end suspended ceiling structure 4.
The utility model provides a visual simulation device of longwall face end suspended ceiling wind current, which can simulate suspended ceilings with different sizes through the similarity ratio and the real reduction of the end suspended ceiling, can be disassembled, assembled and convenient and rapid; under different coal seam geological conditions, the device can simulate a shallow-buried near-horizontal coal seam and simulate waste rocks in a goaf; the device can simulate the change rule of the wind current, and is convenient to observe and analyze; the device can collect parameters such as wind speed and wind pressure and monitor the gas concentration; the high-transparency acrylic plate used by the device can realize visual display and is convenient for observing experimental results.
It should be noted that, in this document, the data acquisition device 13 is not shown completely in the schematic diagram, and a plurality of included devices are not shown, but do not mean nothing, and the content of the description should be taken as a main object, and furthermore, the terms "include", or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, a method, an article, or a device including a series of elements includes not only those elements, but also other elements not listed explicitly, or includes elements inherent to such process, method, article, or device.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a visual analogue means of longwall working face end suspended ceiling wind current which characterized in that: the device comprises a coal seam simulation structure, a supporting structure, a goaf waste rock simulation structure, an end suspended ceiling structure, a roadway simulation device, a gas generation device, a suction fan, a data acquisition device and a computer arranged outside the device, wherein:
the coal seam analogue structure is the transparent box that the equipment formed, bearing structure sets up in the inside of transparent box, separates the transparent box for the sky filling area of coal seam working face and collecting space area waste rock analogue structure, evenly be provided with a plurality of detection preformed holes in the sky filling area of collecting space area waste rock analogue structure, end suspended ceiling structure is the circular arc structure, gas generating device passes through the ventilation pipe and connects the entrance to the wind department at tunnel analogue device, the suction fan passes through the ventilation pipe and connects the air outlet department at tunnel analogue device, is provided with the air door on the tunnel analogue device, the ventilation pipe is provided with the detection preformed hole on being close to gas generating device and suction fan's position, data acquisition device's sense terminal is settled and is being detected preformed hole department, data acquisition device's data transmission end is pegged graft on the outside computer of device.
2. The visual simulation device of the long-wall working face end suspended ceiling wind flow, according to claim 1, is characterized in that: the tunnel simulation device is a sealed cavity with two inlet ends and one return end and comprises a glue transportation tunnel, an auxiliary transportation tunnel and a return air tunnel which are positioned on the same side of the supporting structure.
3. The visual simulation device of the end suspended ceiling wind flow of the long-wall working surface according to claim 2, characterized in that: the air inlet end in gluey fortune tunnel is connected with gaseous generating device through air pipe, the air-out end in gluey fortune tunnel sets up in the sky filling area of collecting space area waste rock analog structure and links to each other with bearing structure, the air inlet end in assistance fortune tunnel is connected with gaseous generating device through air pipe, the air-out end in assistance fortune tunnel can dismantle the intercommunication with gluey fortune tunnel, the air inlet end in return air tunnel sets up in the sky filling area of collecting space area waste rock analog structure, the air-out end in return air tunnel is connected with suction fan through air pipe.
4. The visual simulation device of the long-wall working face end suspended ceiling wind flow, according to claim 2, is characterized in that: the quantity of air door is 3, installs respectively on glue transportation tunnel, subsidiary transportation tunnel and return air tunnel.
5. The visual simulation device of the long-wall working face end suspended ceiling wind flow, according to claim 1, is characterized in that: and a goaf filling area of the goaf waste rock simulation structure is filled with air-dried rubber mud blocks for simulating goaf caving waste rocks with different shapes and sizes.
6. The visual simulation device of the end suspended ceiling wind flow of the long-wall working surface according to claim 1, characterized in that: the box body of the coal seam simulation structure is a transparent acrylic plate.
7. The visual simulation device of the long-wall working face end suspended ceiling wind flow, according to claim 1, is characterized in that: the data acquisition device includes air velocity transducer, wind pressure sensor and wind temperature sensor for detect tunnel analogue means and collecting space area waste rock analogue structure's wind current parameter, be provided with the data processing model in the computer and be used for handling fan operating mode parameter and the wind current parameter that the collection obtained, and carry out data display through the display screen of computer.
8. The visual simulation device of the end suspended ceiling wind flow of the long-wall working surface according to claim 1, characterized in that: and the computer is provided with a camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222278366.8U CN218030256U (en) | 2022-08-29 | 2022-08-29 | Visual analogue means of longwall working face end suspended ceiling wind current |
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| CN202222278366.8U CN218030256U (en) | 2022-08-29 | 2022-08-29 | Visual analogue means of longwall working face end suspended ceiling wind current |
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| CN202222278366.8U Active CN218030256U (en) | 2022-08-29 | 2022-08-29 | Visual analogue means of longwall working face end suspended ceiling wind current |
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