Fully-mechanized face visual dust blocking system and method for coal mine

Abstract

The invention belongs to the field of coal mine dust prevention and control, and particularly relates to a coal mine fully-mechanized face visual dust blocking system which comprises isolation baffles, one isolation baffle is arranged below a top beam of each hydraulic support, and the adjacent isolation baffles in the length direction of a fully-mechanized face are adjacently connected; a camera is arranged on the side, close to the coal mining machine, of each isolation baffle, a display screen is arranged on the side, away from the coal mining machine, of each isolation baffle, and the display screen is connected with the camera arranged on the same isolation baffle through a cable. And each isolation baffle is also provided with a hot fog flow dust falling device. The problem of transverse diffusion of coal cutting dust of the coal mining machine can be solved, and separation of a coal cutting dust production area and an operator area of a fully-mechanized coal mining face is achieved. Meanwhile, an operator can clearly see the coal cutting condition of the coal mining machine in real time, and the influence of a physical isolation barrier on the visual field of the operator is avoided; a channel for dust to pass through and a channel for people to pass through are achieved and do not interfere with each other.

Description

Technical Field

[0001] The present invention belongs to the field of coal mine dust prevention and control (E21 F5), and specifically relates to a visual dust blocking system and method for fully mechanized mining faces in coal mines. Background Art

[0002] A large amount of fine dust is generated during the coal mining process, especially in the fully mechanized mining face (hereinafter referred to as the fully mechanized mining face). The dust generated by the coal mining machine is a continuous dust source, and the instantaneous dust concentration can exceed 1000mg / m 3 At the same time, because the size of the coal mining machine itself occupies the wind flow channel of the mining site, the mining space near the coal mining machine is further reduced, and the blocking effect on the wind flow channel is obvious, forcing the wind flow speed near the coal mining machine to increase significantly, causing the wind flow to carry a large amount of coal cutting dust and quickly spread horizontally to the operator area, affecting the operator's field of vision, and seriously threatening the safe production of the mine and the physical and mental health of the operators. At present, although there are dust control measures such as spray dust control and wind curtain dust control, the dust control effect cannot reach 100%, and there is still a lot of dust escaping and spreading to the operator area, and the wind curtain control measures also affect the operator's field of vision; therefore, how to optimize the dust control effect as much as possible and ensure the operator's field of vision has become a difficult problem that needs to be solved in this field. Summary of the invention

[0003] In view of the above technical problems, the present invention proposes a visual dust blocking system for a fully mechanized mining face in a coal mine, comprising an isolation baffle, wherein an isolation baffle is arranged under the top beam of each hydraulic support, and the isolation baffles adjacent to each other along the length direction of the fully mechanized mining face are adjacent to each other; a camera is arranged on the side of each isolation baffle close to the coal mining machine, and a display screen is arranged on the side of each isolation baffle away from the coal mining machine, and the display screen is connected to the camera arranged on the same isolation baffle through a cable.

[0004] Preferably, the isolation baffle is hinged to the top beam of the hydraulic support, and one end of the telescopic cylinder is hinged to the top beam of the hydraulic support, and the other end is hinged to the isolation baffle.

[0005] Preferably, the isolation baffle adopts a structure that can be extended and retracted in the height direction.

[0006] Preferably, a hot mist dust reduction device is also provided on each isolation baffle, and the hot mist dust reduction device comprises a heating tube and an atomizing nozzle.

[0007] Preferably, the heating tube includes a heating tube shell and a heating porous tube arranged in the heating tube shell and coaxial with the heating tube shell, a heating wire is spirally wound on the heating porous tube, the water outlet end of the heating porous tube is connected to the water outlet pipeline of the atomizing nozzle, and the heating tube shell is connected to the atomizing nozzle at the same end; the length of the other end of the heating tube shell is greater than the length of the other end of the heating porous tube, and the other end of the heating tube shell is set as a water inlet.

[0008] Preferably, a temperature controller is connected to the other end of the heating porous tube, the temperature controller is connected to the heating wire, and an electrical connection element is also connected to the temperature controller in the radial direction, the electrical connection element radially penetrates the heating tube shell, and the electrical connection element is connected to the power supply device.

[0009] Preferably, the water inlets of all the hot mist dust reduction devices are connected to the water supply pipeline.

[0010] Preferably, each hot mist dust reduction device is equipped with a solenoid valve, which is connected to the coal dust sensor.

[0011] A method for visual dust blocking of fully mechanized mining faces in coal mines adopts the visual dust blocking system for fully mechanized mining faces in coal mines described above, including: isolation baffles of adjacent hydraulic supports are adjacent in the length direction of the fully mechanized mining face, all isolation baffles are adjacent or overlapped with coal blocking plates in the vertical direction, the isolation baffles and the coal blocking plates form a physical isolation barrier, and the space between the coal mining machine and the hydraulic support is separated into a coal mining machine coal cutting area and a personnel operation area along the length direction of the entire fully mechanized mining face; at the same time, cameras and display screens are arranged on the isolation baffles, and the coal cutting images in the coal mining machine coal cutting area are projected onto the display screen, so that the operator can see the coal mining machine cutting the coal wall in real time, thereby solving the influence of the physical isolation barrier on the operator's field of vision.

[0012] Preferably, the water inlets of all the hot mist dust reduction devices are connected to the water supply pipeline, and for locations where the coal dust is relatively large in the coal cutting area of ​​the coal mining machine, the corresponding hot mist dust reduction devices are turned on to reduce the dust.

[0013] Beneficial technical effects: 1. The visual dust-blocking system and method for fully mechanized mining face of the present invention can solve the problem of lateral diffusion of coal-cutting dust from coal-cutting machines, and separate the dust-generating area of ​​fully mechanized mining face from the operator area. At the same time, cameras and display screens are arranged on the isolation baffles, so that operators can see the coal-cutting situation of the coal-cutting machine in real time, solving the impact of the physical isolation barrier on the operator's field of vision. The present invention can achieve 100% dust control effect without affecting the normal operation of personnel, and realize a channel for dust to go to dust and a channel for people to go to people, without interfering with each other.

[0014] 2. The hot mist flow dust reduction device of the present invention utilizes a method of heating the mist flow medium to increase the temperature of the mist flow, thereby increasing the activity of the droplets and improving the efficiency of the mist flow colliding with the dust particles to condense and settle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the visualized dust-blocking system for fully mechanized mining face of a coal mine according to the present invention (from the perspective of the personnel operating area);

[0016] Figure 2 It is a side view of the visualized dust-blocking system for fully mechanized mining face in coal mines of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the hot mist dust reduction device of the present invention;

[0018] In the figure, 1-coal mining machine; 2-coal baffle; 3-camera; 4-display screen; 5-isolation plate; 6-telescopic cylinder; 7-hydraulic support; atomizing nozzle 9; heating pipe shell 10; heating porous pipe 11; water hole 12; heating wire 13; water inlet 14; temperature controller 15; power connection element 16. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Embodiment 1

[0021] like Figure 1-2As shown, the present invention proposes a visual dust barrier system for a fully mechanized mining face in a coal mine, wherein the visual dust barrier system for a fully mechanized mining face in a coal mine is arranged in a fully mechanized mining face, wherein the fully mechanized mining face comprises a coal mining machine 1 and a plurality of hydraulic supports 7 arranged along the length direction of the fully mechanized mining face, and a scraper conveyor is further arranged between the coal mining machine 1 and the hydraulic supports 7 along the length direction of the fully mechanized mining face, wherein a coal retaining plate 2 is arranged on the scraper conveyor, and the arrangement relationship among the scraper conveyor, the coal mining machine 1 and the hydraulic supports 7 is common knowledge in the art and will not be repeated here; the visual dust barrier system for a fully mechanized mining face in a coal mine comprises an isolation baffle 5, wherein an isolation baffle 5 is arranged above the coal retaining plate 2 and under the top beam of each hydraulic support 7, respectively, and the lower part of each isolation baffle 5 can be adjacent to or overlapped with the coal retaining plate 2 in the vertical direction, and the adjacent isolation baffles 5 along the length direction of the fully mechanized mining face are adjacent to each other; each isolation baffle 5 can move independently; and a There is a camera 3, which is used to collect the image of the coal cutting machine in front of the corresponding isolation baffle 5. A display screen 4 is arranged on the side of each isolation baffle 5 away from the coal cutting machine 1 (i.e., the personnel operating area). The display screen 4 is connected to the camera 3 arranged on the same isolation baffle 5 through a cable to display the image collected by the camera 3; the isolation baffle 5 can protect the display screen and the operator. When the coal mining height changes within a certain threshold range, it is only necessary to adjust the overlap length of the isolation baffle 5 and the isolation baffle 2 to adapt to the change in coal mining height. For the case where the coal seam height is relatively large, the isolation baffle 5 preferably adopts a structure that can be telescopic in the height direction; further, the isolation baffle 5 is hinged to the top beam of the hydraulic support, and a telescopic cylinder 6 is hinged at one end to the top beam of the hydraulic support and at the other end to the isolation baffle 5, so that the angle of the isolation baffle 5 can be adjusted to adapt to the situation where the coal mining height is reduced.

[0022] The method of use corresponding to the technical solution of embodiment 1 is as follows:

[0023] The isolation baffles 5 of adjacent hydraulic supports 7 overlap in the length direction of the comprehensive mining face, and all the isolation baffles 5 overlap with the coal baffle plate 2 in the vertical direction, that is, the isolation baffles 5 and the coal baffle plate 2 form a physical isolation barrier, which divides the space between the coal mining machine 1 and the hydraulic support 7 into a coal mining machine coal cutting area and a personnel operation area along the length direction of the entire comprehensive mining face, and completely blocks the coal cutting dust of the coal mining machine 1 from spreading to the personnel operation area. At the same time, a camera 3 and a display screen 4 are arranged on the isolation baffle 5, and the coal cutting area of ​​the coal mining machine, especially the coal cutting screen of the coal mining machine drum, is projected on the display screen 4, so that the operator can see the coal cutting situation of the coal mining machine in real time, and solve the influence of the physical isolation barrier on the operator's field of vision. This method can achieve 100% dust control effect without affecting the normal operation of personnel, and realize a channel for dust to go away and a channel for people to go away without interfering with each other.

[0024] Embodiment 2

[0025] On the basis of Example 1, in order to reduce the coal dust in the coal cutting area of ​​the coal mining machine, reduce the coal dust content in the air discharged to the return air tunnel, reduce the impact of coal dust leakage to the personnel operation area, and improve the visualization of the coal cutting area of ​​the coal mining machine, on the basis of Example 1, a hot mist flow dust reduction device is also provided on each isolation baffle 5, and the hot mist flow dust reduction device includes a heating pipe and an atomizing nozzle 9, the heating pipe includes a heating pipe shell 10 and a heating porous pipe 11 arranged in the heating pipe shell 10 and coaxial with the heating pipe shell 10, the heating porous pipe 11 is provided with a water hole 12, and the heating porous pipe 11 is spirally wound with a heating wire 13, and the heating wire 13 avoids the heating porous A water hole 12 on the tube 11; the water outlet end of the heating porous tube 11 is connected to the water outlet pipeline of the atomizing nozzle 9, and the heating tube shell 10 is connected to the atomizing nozzle 9 at the same end; the length of the other end of the heating tube shell 10 is greater than the length of the other end of the heating porous tube 11, and the other end of the heating tube shell 10 is set as a water inlet 14; preferably, a temperature controller 15 is connected to the other end of the heating porous tube 11, and the temperature controller 15 is connected to the heating wire 13, and an electric connection element 16 is also connected to the temperature controller 15 in the radial direction, and the electric connection element 16 radially penetrates the heating tube shell 10, and the electric connection element 16 is connected to the power supply device to supply power to the heating wire 13 for heating.

[0026] The water inlet 14 of all the hot mist flow dust suppression devices is connected to the water supply pipeline. For the location where the coal dust is relatively large in the coal mining machine cutting area, the corresponding hot mist flow dust suppression device is opened to suppress dust. Preferably, each hot mist flow dust suppression device is equipped with a solenoid valve, which is connected to the coal dust sensor. When the coal dust sensor measures that the coal dust concentration at its location reaches a set threshold, the solenoid valve of the corresponding hot mist flow dust suppression device is opened, and the atomizing nozzle 9 sprays water to suppress dust. When the coal dust sensor measures that the coal dust concentration at its location is lower than the set threshold, the battery valve of the corresponding hot mist flow dust suppression device is closed.

[0027] The hot mist flow dust reduction device of the present invention utilizes a method of heating the mist flow medium to increase the temperature of the mist flow, thereby increasing the activity of the mist droplets and improving the efficiency of the mist flow colliding with the dust particles to condense and settle.

[0028] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of methods under the inspiration of the present invention. Any technical solution that is the same or similar to that of the present application falls within the protection scope of the present invention.

Claims

1. A visual dust-blocking system for fully mechanized mining face in coal mines, characterized in that: It includes an isolation baffle, wherein an isolation baffle is arranged under the top beam of each hydraulic support, and the adjacent isolation baffles along the length direction of the comprehensive mining face are adjacent to each other; a camera is arranged on the side of each isolation baffle close to the coal mining machine, and a display screen is arranged on the side of each isolation baffle away from the coal mining machine, and the display screen is connected to the camera arranged on the same isolation baffle through a cable.

2. The visual dust-blocking system for fully mechanized mining face in coal mines according to claim 1 is characterized in that: The isolation baffle is hinged to the top beam of the hydraulic support, and one end of the telescopic cylinder is hinged to the top beam of the hydraulic support, and the other end is hinged to the isolation baffle; 3. The visual dust-blocking system for fully mechanized mining face in coal mines according to claim 1 is characterized in that: The isolation baffle adopts a structure that can be extended and retracted in the height direction.

4. The visual dust blocking system for fully mechanized mining face in coal mines according to claim 1 is characterized in that: A hot mist dust reduction device is also arranged on each isolation baffle, and the hot mist dust reduction device comprises a heating tube and an atomizing nozzle.

5. The visual dust-blocking system for fully mechanized mining face in coal mines according to claim 4 is characterized in that: The heating tube includes a heating tube shell and a heating porous tube arranged in the heating tube shell and coaxial with the heating tube shell, a heating wire is spirally wound on the heating porous tube, the water outlet end of the heating porous tube is connected to the water outlet pipeline of the atomizing nozzle, and the heating tube shell is connected to the atomizing nozzle at the same end; the length of the other end of the heating tube shell is greater than the length of the other end of the heating porous tube, and the other end of the heating tube shell is set as a water inlet.

6. The visual dust-blocking system for fully mechanized mining face in coal mines according to claim 5 is characterized in that: A temperature controller is connected to the other end of the heating porous tube, and the temperature controller is connected to the heating wire. An electric connection element is also connected to the temperature controller in the radial direction, and the electric connection element radially penetrates the heating tube shell and is connected to the power supply device.

7. The visual dust blocking system for fully mechanized mining face in coal mines according to any one of claims 4 to 6, characterized in that: The water inlets of all the hot mist dust suppression devices are connected to the water supply pipeline.

8. The visual dust-blocking system for fully mechanized mining face in coal mines according to claim 7 is characterized in that: Each hot mist dust suppression device is equipped with a solenoid valve, which is connected to a coal dust sensor.

9. A method for visually blocking dust in a fully-mechanized mining face of a coal mine, using the visually blocking dust system for a fully-mechanized mining face of a coal mine according to any one of claims 1 to 8, comprising: The isolation baffles of adjacent hydraulic supports are adjacent in the length direction of the comprehensive mining face, and all isolation baffles are adjacent or overlapped with the coal baffles in the vertical direction. The isolation baffles and the coal baffles form a physical isolation barrier, which separates the space between the coal mining machine and the hydraulic support into a coal mining machine coal cutting area and a personnel operation area along the length direction of the entire comprehensive mining face. At the same time, cameras and display screens are arranged on the isolation baffles, and the coal cutting images in the coal mining machine coal cutting area are projected onto the display screen, so that the operator can see the coal wall cutting situation of the coal mining machine in real time, thereby solving the impact of the physical isolation barrier on the operator's field of vision.

10. The method for visually blocking dust in a fully mechanized mining face of a coal mine according to claim 9, characterized in that: The water inlets of all the hot mist dust suppression devices are connected to the water supply pipeline. For locations where the coal dust is relatively large in the coal cutting area of ​​the coal mining machine, the corresponding hot mist dust suppression devices are turned on to suppress the dust.

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