Dust falling device and method for heading face

Abstract

The invention relates to a dust falling technique for an underground heading face of a coal mine, in particular to a dust falling device for the heading face. The dust falling device for the heading face comprises a heading machine, a spraying device, a compressed air jetting device and a dust removal system, wherein a heading machine rotating head is driven to rotate by the heading machine through a mechanical arm; the spraying device is used for spraying umbrella-shaped water mist to a drill bit and the heading face, and additionally, a spraying range outer contour line is formed; the compressed air jetting device is used for jetting umbrella-shaped compressed air to the drill bit and the heading face, so that the contact opportunity of water mist and dust is increased, an air wall is formed behind the umbrella-shaped water mist, and additionally, a compressed air jetting range outer contour line is formed; and a dust removal suction port is formed in the dust removal system, the dust removal suction port is formed between the spraying range outer contour line and the heading face, and the dust removal system is used for performing active negative-pressure suction type dust removal on flying dust between the spraying range outer contour line and the heading face. According to the dust falling device, the working environment of the heading face is improved, and occupational health of underground workers is guaranteed. In addition, the invention further provides a dust falling method for the heading face.

Description

technical field

[0001] The invention relates to a technology for reducing dust on an excavation face in a coal mine, in particular to a dust reduction device and method for an excavation face. Background technique

[0002] As one of the main disasters in coal mines, coal dust has the possibility of explosion, seriously pollutes the underground air quality, and poses a potential threat to the occupational health of underground workers. Coal mine roadway excavation working face is one of the main sources of coal dust. During the process of roadway excavation, a large amount of coal dust is produced, especially in the excavation roadway that is ventilated by press-in local ventilation method. diffusion. The current dust prevention measures for the tunneling face mainly include coal seam water injection, roadheader spray, dust removal fan, dust screen, etc., but the dust removal effect is not satisfactory. Therefore, an efficient dust removal method is urgently needed to reduce...

Examples

Embodiment 1

[0034] Such as Figure 1-Figure 4 As shown, the present embodiment proposes a dust suppression device for the excavation working face, which is arranged in the underground roadway and includes a roadheader 5, which drives the rotary head 8 of the roadheader to rotate through the drill pipe; the spray device 7 is arranged on the drill pipe At a position between 81.5m and 2m away from the rotary head of the driving roadheader, the spray device 7 is used to spray umbrella-shaped water mist to the rotary head 8 of the driving roadheader and the excavation work surface (in the direction of the solid coal 22), and at the same time form a spray range The outer contour line 10; the compressed air injection device 6 is arranged on the drill pipe and is located at 0.1m-0.3m behind the spray device 7, and the compressed air injection device 6 is used to spray the umbrella to the rotary head 8 of the driving roadheader and the excavation working face Shaped pressure gas, to improve the co...

Embodiment 2

[0048] The dust reduction method for the tunneling face in this embodiment uses the dust suppression device for the tunneling face as proposed in Embodiment 1. When the roadheader 5 is working, the amount of dust in the roadway increases, and the dust sensor 16 on the mechanical arm of the roadheader 5 monitors the dust. When the content exceeds the critical value, the dust sensor 16 sends a point signal to the central control box 11, and the central control box 11 sends an instruction to open the air curtain electromagnetic switch 14, the water curtain electromagnetic switch 15 and the dust removal fan 2; after the air curtain electromagnetic switch 15 is opened, The barrier formed by the Fengshui curtain limits the diffusion range of dust to a small range close to the excavation work face. Part of the large particle dust is captured by the water curtain, and the small particle dust is intercepted by the air curtain. The dust wind flows through the steel skeleton negative press...

technical field

[0001] The invention relates to a technology for reducing dust on an excavation face in a coal mine, in particular to a dust reduction device and method for an excavation face. Background technique

[0002] As one of the main disasters in coal mines, coal dust has the possibility of explosion, seriously pollutes the underground air quality, and poses a potential threat to the occupational health of underground workers. Coal mine roadway excavation working face is one of the main sources of coal dust. During the process of roadway excavation, a large amount of coal dust is produced, especially in the excavation roadway that is ventilated by press-in local ventilation method. diffusion. The current dust prevention measures for the tunneling face mainly include coal seam water injection, roadheader spray, dust removal fan, dust screen, etc., but the dust removal effect is not satisfactory. Therefore, an efficient dust removal method is urgently needed to reduce...

Examples

Embodiment 1

[0034] Such as Figure 1-Figure 4 As shown, the present embodiment proposes a dust suppression device for the excavation working face, which is arranged in the underground roadway and includes a roadheader 5, which drives the rotary head 8 of the roadheader to rotate through the drill pipe; the spray device 7 is arranged on the drill pipe At a position between 81.5m and 2m away from the rotary head of the driving roadheader, the spray device 7 is used to spray umbrella-shaped water mist to the rotary head 8 of the driving roadheader and the excavation work surface (in the direction of the solid coal 22), and at the same time form a spray range The outer contour line 10; the compressed air injection device 6 is arranged on the drill pipe and is located at 0.1m-0.3m behind the spray device 7, and the compressed air injection device 6 is used to spray the umbrella to the rotary head 8 of the driving roadheader and the excavation working face Shaped pressure gas, to improve the co...

Embodiment 2

[0048] The dust reduction method for the tunneling face in this embodiment uses the dust suppression device for the tunneling face as proposed in Embodiment 1. When the roadheader 5 is working, the amount of dust in the roadway increases, and the dust sensor 16 on the mechanical arm of the roadheader 5 monitors the dust. When the content exceeds the critical value, the dust sensor 16 sends a point signal to the central control box 11, and the central control box 11 sends an instruction to open the air curtain electromagnetic switch 14, the water curtain electromagnetic switch 15 and the dust removal fan 2; after the air curtain electromagnetic switch 15 is opened, The barrier formed by the Fengshui curtain limits the diffusion range of dust to a small range close to the excavation work face. Part of the large particle dust is captured by the water curtain, and the small particle dust is intercepted by the air curtain. The dust wind flows through the steel skeleton negative press...

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