A visual barrier dust system and method for fully-mechanized coal mining face

Abstract

The present application belongs to the field of coal mine dust prevention and control, and particularly relates to a visual barrier dust system for fully mechanized coal face, comprising isolation baffles, one isolation baffle is arranged under the top beam of each hydraulic support, and adjacent isolation baffles along the length direction of the fully mechanized coal face abut 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, the display screen is connected with the camera arranged on the same isolation baffle through a cable. A hot fog flow dust-settling device is further arranged on each isolation baffle. The present application can solve the problem of transverse diffusion of coal cutting dust of the coal mining machine, and realize the separation of the coal cutting dust area and the operator area of the fully mechanized coal face. Meanwhile, the operator can clearly see the coal cutting condition of the coal mining machine in real time, and the influence of the physical isolation barrier on the operator's field of view is solved; the dust channel and the human channel are realized, and they do not interfere with each other.

Description

Technical Field

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

[0002] Coal mining processes generate a large amount of fine dust, especially in fully mechanized mining faces, where the dust generated by coal cutting machines poses a severe hazard. Dust from coal cutting is a continuous dust source, with instantaneous dust concentrations exceeding 1000 mg / m³. 3 Meanwhile, the size of the coal mining machine itself occupies the airflow channel in the mining area, further reducing the mining space near the machine and significantly obstructing the airflow. This forces a substantial increase in airflow velocity near the machine, causing the airflow to carry a large amount of coal cutting dust that rapidly diffuses laterally into the operator's area, affecting their visibility and seriously threatening mine safety and the physical and mental health of the workers. Currently, although dust control measures such as spray dust control and air curtain dust control exist, their effectiveness cannot reach 100%, and a considerable amount of dust still escapes and diffuses into the operator's area. Furthermore, air curtain dust control measures also affect the operator's visibility. Therefore, how to optimize dust control as much as possible while ensuring the operator's visibility has become a difficult problem to be solved in this field. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a visual dust control system for fully mechanized coal mining faces, comprising isolation baffles. One isolation baffle is arranged under the top beam of each hydraulic support, and adjacent isolation baffles are connected to each other along the length of the fully mechanized coal mining face. A camera is installed on the side of each isolation baffle closest to the coal mining machine, and a display screen is installed on the side of each isolation baffle away from the coal mining machine. The display screen is connected to the camera installed on the same isolation baffle via a cable.

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

[0005] Preferably, the isolation baffle has a structure that can extend and retract in the height direction.

[0006] Preferably, each isolation baffle is also provided with a hot mist dust suppression device, which includes a heating pipe and an atomizing nozzle.

[0007] Preferably, the heating tube includes a heating tube housing and a heating porous tube disposed inside the heating tube housing and coaxial with the heating tube housing. 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 pipe of the atomizing nozzle. The heating tube housing and the atomizing nozzle are connected at the same end. The length of the other end of the heating tube housing is greater than the length of the other end of the heating porous tube, and the other end of the heating tube housing 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 radially to the temperature controller. The electrical connection element penetrates the heating tube housing radially and is connected to a power supply device.

[0009] Preferably, the water inlet of all the hot mist dust suppression devices is connected to the water supply pipeline.

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

[0011] A visual dust control method for fully mechanized coal mining faces, employing the aforementioned visual dust control system for fully mechanized coal mining faces, includes: isolation baffles of adjacent hydraulic supports are adjacent to each other along the length of the fully mechanized coal mining face; all isolation baffles are adjacent to or overlap with coal retaining plates in the vertical direction; the isolation baffles and coal retaining plates form a physical isolation barrier, dividing the space between the coal mining machine and the hydraulic supports along the entire length of the fully mechanized coal mining face into a coal cutting area and a personnel operation area; simultaneously, cameras and display screens are installed on the isolation baffles to project the coal cutting scene of the coal mining machine's cutting area onto the display screens, enabling operators to clearly see the coal cutting situation of the coal mining machine in real time, thus solving the impact of the physical isolation barrier on the operator's field of vision.

[0012] Preferably, the inlets of all the hot mist dust suppression devices are connected to the water supply pipeline. For areas with high levels of coal dust in the coal cutting area of ​​the coal mining machine, the corresponding hot mist dust suppression device is turned on to suppress the dust.

[0013] Beneficial Technical Effects: 1. The fully mechanized mining face visualization dust control system and method of this invention can solve the problem of lateral diffusion of coal cutting dust, achieving separation between the dust-generating area of ​​the fully mechanized mining face and the operator's area. Simultaneously, cameras and displays are installed on the isolation baffles, allowing operators to clearly see the coal cutting situation in real time, thus resolving the impact of physical isolation barriers on the operator's field of vision. This invention achieves 100% dust control without affecting normal personnel operation, creating separate channels for dust and personnel, ensuring no interference between them.

[0014] 2. The hot mist dust suppression device of the present invention utilizes the method of heating the mist medium to increase the temperature of the mist, thereby increasing the activity of the mist droplets and improving the efficiency of the mist colliding, condensing, and settling with dust particles. Attached Figure Description

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

[0016] Figure 2 This is a side view of the fully mechanized coal mining face visualization dust blocking system of the present invention;

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

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

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Example 1

[0021] like Figure 1-2As shown, this invention proposes a visual dust-blocking system for fully mechanized mining faces in coal mines. The system is arranged within the fully mechanized mining face, which includes a coal mining machine 1 and several hydraulic supports 7 arranged along the length of the face. A scraper conveyor is also arranged between the coal mining machine 1 and the hydraulic supports 7 along the length of the face. A coal retaining plate 2 is installed on the scraper conveyor. The arrangement of the scraper conveyor, the coal mining machine 1, and the hydraulic supports 7 is common knowledge in the art and will not be elaborated further. The visual dust-blocking system includes isolation baffles 5. Above the coal retaining plate 2, an isolation baffle 5 is arranged under the top beam of each hydraulic support 7. The lower part of each isolation baffle 5 can be adjacent to or overlap with the coal retaining plate 2 in the vertical direction. Adjacent isolation baffles 5 along the length of the face are adjacent to each other. Each isolation baffle 5 can move independently. A design is provided on the side of each isolation baffle 5 closest to the coal mining machine 1. A camera 3 is provided to capture images of coal cutting by the coal mining machine in front of its corresponding isolation baffle 5. A display screen 4 is provided on the side of each isolation baffle 5 away from the coal mining machine 1 (i.e., the personnel operation area). The display screen 4 is connected to the camera 3 on the same isolation baffle 5 via a cable to display the images captured by the camera 3. The isolation baffle 5 can protect the display screen and the operators. When the coal mining height changes within a certain threshold range, it is only necessary to adjust the overlap length between the isolation baffle 5 and the isolation baffle 2 to adapt to the change in coal mining height. For cases where the coal seam height is relatively large, the isolation baffle 5 preferably adopts a structure that can extend and retract in the height direction. Furthermore, the isolation baffle 5 is hinged to the top beam of the hydraulic support. 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, thereby adjusting the angle of the isolation baffle 5 to adapt to the decrease in coal mining height.

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

[0023] The isolation baffles 5 of adjacent hydraulic supports 7 overlap along the length of the fully mechanized mining face, and all isolation baffles 5 overlap with the coal retaining plate 2 in the vertical direction. That is, the isolation baffles 5 and the coal retaining plate 2 form a physical isolation barrier, dividing the space between the coal mining machine 1 and the hydraulic support 7 along the entire length of the fully mechanized mining face into the coal cutting area and the personnel operation area. This completely prevents the spread of coal cutting dust from the coal mining machine 1 to the personnel operation area. At the same time, cameras 3 and display screens 4 are installed on the isolation baffles 5 to project the coal cutting area of ​​the coal mining machine, especially the coal cutting of the coal drum, onto the display screens 4, so that the operators can see the coal cutting situation of the coal mining machine in real time. This solves the problem of the physical isolation barrier affecting the operator's vision. This method can achieve 100% dust control without affecting the normal operation of personnel, realizing a channel for dust to go and a channel for people to go, without interference between them.

[0024] Example 2

[0025] Based on Example 1, in order to reduce coal dust in the coal cutting area of ​​the coal mining machine, reduce the coal dust content in the air discharged into the return airway, reduce the impact of coal dust leakage into the personnel operating area, and improve the visibility of the coal cutting area of ​​the coal mining machine, a hot mist dust suppression device is also installed on each isolation baffle 5, based on Example 1. The hot mist dust suppression 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 disposed inside the heating pipe shell 10 and coaxial with the heating pipe shell 10. The heating porous pipe 11 is provided with water passage holes 12, and a heating wire 13 is spirally wound on the heating porous pipe 11, the heating wire 13 avoiding the heating porous pipe. Water passage hole 12 on pipe 11; the water outlet end of the heating porous pipe 11 is connected to the water outlet pipe of the atomizing nozzle 9, and the heating pipe housing 10 is connected to the atomizing nozzle 9 at the same end; the length of the other end of the heating pipe housing 10 is greater than the length of the other end of the heating porous pipe 11, and the other end of the heating pipe housing 10 is set as a water inlet 14; preferably, a temperature controller 15 is connected to the other end of the heating porous pipe 11, the temperature controller 15 is connected to the heating wire 13, and an electrical connection element 16 is also connected radially to the temperature controller 15. The electrical connection element 16 penetrates the heating pipe housing 10 radially, and the electrical connection element 16 is connected to a power supply device to supply power to the heating wire 13 for heating.

[0026] All the inlets 14 of the thermal mist dust suppression devices are connected to the water supply pipeline. For areas with high coal dust concentrations in the coal cutting area, the corresponding thermal mist dust suppression device is activated for dust suppression. Preferably, each thermal mist dust suppression device is equipped with a solenoid valve connected to a coal dust sensor. When the coal dust sensor detects that the coal dust concentration at its location reaches a set threshold, the solenoid valve of the corresponding thermal mist dust suppression device opens, and the atomizing nozzle 9 sprays water to suppress dust. When the coal dust sensor detects that the coal dust concentration at its location is lower than the set threshold, the solenoid valve of the corresponding thermal mist dust suppression device closes.

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

[0028] This invention is not limited to the preferred embodiments described above. Anyone can derive other methods in various forms under the guidance of this invention. Any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A visual barrier dust system for fully mechanized coal face, characterized in that, The isolation baffle is hinged to the top beam of the hydraulic support, and one end of the telescopic oil cylinder is hinged to the top beam of the hydraulic support and the other end is hinged to the isolation baffle.

2. The visualized dust barrier system for fully mechanized coal mining face according to claim 1, characterized in that, The isolation baffle is hinged to the top beam of the hydraulic support, and one end of the telescopic oil cylinder is hinged to the top beam of the hydraulic support and the other end is hinged to the isolation baffle.

3. The visualized dust barrier system for fully mechanized coal mining face according to claim 1, characterized in that, The isolation baffle is hinged to the top beam of the hydraulic support, and one end of the telescopic oil cylinder is hinged to the top beam of the hydraulic support and the other end is hinged to the isolation baffle.

4. The visualized dust barrier system for fully mechanized coal mining face according to claim 1, characterized in that, The water inlet of all the hot mist flow dust setting devices is connected with the water supply pipeline.

5. The visual barrier dust system for fully mechanized coal face according to claim 4, characterized in that, Each hot mist flow dust setting device is provided with an electromagnetic valve connected with the coal dust sensor.

6. A visual dust blocking method for fully mechanized coal mining face, using the visual dust blocking system for fully mechanized coal mining face according to any one of claims 1-5, comprising: The isolation baffles of adjacent hydraulic supports are adjacent in the length direction of the fully-mechanized coal mining face, and all the isolation baffles are adjacent or overlapped with the coal blocking plates in the vertical direction, so that the isolation baffles and the coal blocking plates form a physical isolation barrier, the space between the coal mining machine and the hydraulic support is divided into a coal mining area of the coal mining machine and a personnel operation area along the length direction of the fully-mechanized coal mining face, and the camera and the display screen are arranged on the isolation baffle, so that the coal mining picture of the coal mining area of the coal mining machine is projected on the display screen, and the operator can clearly see the coal cutting situation of the coal mining machine in real time, and the influence of the physical isolation barrier on the operator's field of vision is solved.

7. The fully mechanized coal face visualized dust blocking method for coal mine according to claim 6, characterized in that, The water inlet of all the hot mist flow dust setting devices is connected with the water supply pipeline.

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