Anti-dust device for roadway under mine

Abstract

The dustproof device comprises a full-section water curtain framework, dustproof nets and spraying pipes, the top of the full-section water curtain framework is of an arch structure, the dustproof nets are arranged on the two sides of the full-section water curtain framework, the spraying pipes are installed on one side of the top of the full-section water curtain framework in an arch shape, and spraying heads of the spraying pipes are installed towards the dustproof nets close to the top. The full-section water curtain framework is provided with a vacant notch at the position of the conveying belt, a door is arranged close to the middle of the full-section water curtain framework, a water collecting tank is arranged on the ground opposite to the full-section water curtain, and the dustproof nets are all arranged except the notch. Spraying is changed into full water curtain framework, double dust nets and spraying, water curtains are formed after spraying is conducted towards the dust screens, and then the dust falling effect can be greatly improved after three wind dust devices are installed.

Description

Technical Field

[0001] The invention belongs to the technical field of verifying drilling orientation in a given area and relates to a dust prevention device for a mine tunnel. Background Art

[0002] When the fully-mechanized tunnel boring machine in the mine is cutting normally, a large amount of dust will be generated. Conventionally, a full spray wall is used for dust reduction. However, the comprehensive dust concentration on the working face is 198.4 mg / m³, and the respirable dust concentration is 142.5 mg / m³. The comprehensive dust concentration outside the third water curtain is 175.6 mg / m³, and the respirable dust concentration is 135.7 mg / m³, and the dust reduction effect is poor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a dust prevention device for underground mine tunnels to improve the dust reduction effect.

[0004] The solution implemented by the present invention is: A dust prevention device for an underground mine tunnel comprises a full-section water curtain frame, a dustproof net and a spray pipe. The top of the full-section water curtain frame is an arched structure, and dustproof nets are arranged on both sides. The spray pipe is arched and installed on one side of the top of the full-section water curtain frame, and the spray head of the spray pipe is installed toward the dustproof net near the top. The full-section water curtain frame is provided with a gap at the conveyor belt, and a door is provided near the middle. A water collecting trough is provided on the ground directly opposite the full-section water curtain, and dustproof nets are arranged everywhere except at the gap.

[0005] Furthermore, a water collecting pan is installed above the conveyor belt, facing the gap and having a width greater than the conveyor belt. A drain pipe is provided at the bottom of the water collecting pan, which is connected to the water collecting trough.

[0006] Furthermore, two inverted U-shaped support frames are provided at the bottom of the water collecting tray. The lower ends of the two support frames are fixedly connected on the same side by channel steels with the grooves facing downwards. The two channel steels (11) are respectively clamped to the two roller support rods provided on both sides of the conveyor belt.

[0007] Furthermore, the above-mentioned full-section water curtain frame adopts a four-pronged pipe that is detachably fixed and connected horizontally and longitudinally to form a straight wall semicircular arch. Furthermore, the spray pipe is fixedly connected to the top plate of the tunnel, and the spray pipe is connected to a water pump through a pipeline.

[0008] Furthermore, the above-mentioned dust prevention device for underground mine tunnels also includes a dust sensor, which is installed on the top of the tunnel in front of the water curtain.

[0009] Furthermore, the dust sensor is electrically connected to the controller, and the controller is connected to the water pump.

[0010] Furthermore, the above-mentioned dust prevention device for underground mine tunnels also includes a passerby identification module installed on the top of the tunnel in front of the water curtain, and the passerby identification module is connected to the controller.

[0011] The effects of the present invention are as follows: the present invention changes the spray into a full water curtain skeleton + double dust net + spray, and the spray is sprayed toward the dust net to form a water curtain. After the three-way dust removal device is installed, the dust reduction effect can be greatly improved. Through experiments, the dust concentration of the working surface of the tunnel boring machine during normal cutting is 196.8 mg / m³, the respirable dust concentration is 131.8 mg / m³, the comprehensive dust concentration outside the third water curtain is 88.6 mg / m³, and the respirable dust concentration is 33.5 mg / m³. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the front structure of the roadway dust prevention device; Figure 2 This is a schematic diagram of the water collection tray installation structure; Figure 3 It is a side view structural diagram of the tunnel dust prevention device. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to specific embodiments.

[0014] Example 1: Figure 1-3 As shown, a dust prevention device for an underground mine tunnel includes a full-section water curtain frame 1, a dustproof net 2 and a spray pipe 3. The top of the full-section water curtain frame 1 is an arched structure, and the dustproof nets 2 are arranged on both sides. The spray pipe 3 is arched and installed on one side of the top of the full-section water curtain frame 1, and the spray head of the spray pipe 3 is installed facing the dustproof net 2 near the top. The full-section water curtain frame 1 is provided with a gap 7 at the conveyor belt 4, and a door 5 is provided near the middle. A water collection trough 6 is provided on the ground opposite the full-section water curtain 1. The dustproof net 2 is arranged in all places except the gap 7. The water collection trough 6 is a horizontal ditch with a width of 300 mm and a depth of 300 mm, so that water is discharged along the ditch.

[0015] In order to prevent the water of the water curtain from flowing into the water collecting tray through the gap, a water collecting tray 8 is installed above the conveyor belt 4. The water collecting tray 8 is opposite to the top of the gap 7 and is wider than the belt of the conveyor belt 4. A drain pipe 9 is provided at the bottom of the water collecting tray 8. The drain pipe 9 is connected to the water collecting trough 6. A water collecting tray is installed between the full-section water curtain of the tunnel and the belt conveyor to prevent water from flowing onto the belt.

[0016] In order to stably support the water collecting tray, two inverted U-shaped support frames 10 are provided at the bottom of the water collecting tray 8. The two lower ends of the two support frames 10 are fixedly connected on the same side by channel steels 11 with the grooves facing downward. The two channel steels 11 are respectively clamped to the two roller support rods 15 set on both sides of the conveyor belt 4. The two strip-shaped U-shaped channel steels are clamped to the roller support rods 15, which can achieve stable support. The container is also convenient for position adjustment and detachable transportation, and loading and unloading are convenient. The length of one side of the water collecting tray facing the working surface is greater than the length on the other side, which is convenient for collecting extra water droplets generated by the spray on that side.

[0017] In order to facilitate movement, the full-section water curtain frame 1 adopts four-pronged pipes that are detachably fixed and connected horizontally and longitudinally to form a straight wall semi-circular arch. It can meet the requirements of arranging dustproof nets on the full section and can be easily moved. Moreover, the detachable structure realizes a modular structure, which is more conducive to movement (usually moved once a month).

[0018] In order to ensure stable installation, the spray pipe 3 is fixedly connected to the top plate 12 of the tunnel through a clamp. The spray pipe 3 is connected to the water pump through a pipe. The water pump realizes stable spraying of the spray pipe. The spray pipe is installed on the side of the full-section water curtain frame 1 facing the working surface.

[0019] In order to monitor dust concentration, a dust prevention device for a mine tunnel also includes a dust sensor 13. The dust sensor 13 is installed on the top of the tunnel in front of the water curtain, which can monitor dust concentration. When the monitored data meets the need to turn on the water pump, the water pump is controlled to turn on.

[0020] In order to realize automatic dust removal, the dust sensor 13 is electrically connected to the controller, and the controller is connected to the water pump. When the dust concentration is detected to be greater than the set value, the water pump is started to spray to form a dust-reducing water curtain, saving energy consumption.

[0021] In order to automatically open and close when someone passes by, a dust prevention device for underground mine tunnels also includes a passerby identification module 14 installed on the top of the tunnel in front of the water curtain. The passerby identification module 14 uses a camera and is connected to a controller. When it detects that someone is about to pass by, the water pump is turned off to stop the formation of the water curtain.

[0022] Before the transformation: When the tunnel boring machine was cutting normally, the comprehensive dust concentration on the working face was 198.4 mg / m³, and the respirable dust concentration was 142.5 mg / m³. The comprehensive dust concentration outside the third water curtain was 175.6 mg / m³, and the respirable dust concentration was 135.7 mg / m³. After the transformation: the dust concentration on the working surface of the tunnel boring machine during normal cutting is 196.8 mg / m³, the respirable dust concentration is 131.8 mg / m³, the comprehensive dust concentration outside the third water curtain is 88.6 mg / m³, and the respirable dust concentration is 33.5 mg / m³.

[0023] The comprehensive dust fall rate increased by 43.5%, and the respirable dust fall rate increased by 69.8%.

[0024] calculate: Before the renovation: the comprehensive dust fall rate was (198.4-175.6) / 198.4≈11.5%, and the respirable dust fall rate was (142.5-135.7) / 142.5≈4.8%; After the transformation: the comprehensive dust fall rate is (196.8-88.6) / 196.8≈55%, and the respirable dust fall rate is (131.8-33.5) / 131.8≈74.6% The comprehensive dust fall rate increased by 55%-11.5%=43.5%; the respirable dust fall rate increased by 74.6%-4.8%=69.8%.

[0025] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dust prevention device for underground mine tunnels, characterized in that: The invention comprises a full-section water curtain frame (1), a dustproof net (2) and a spray pipe (3). The top of the full-section water curtain frame (1) is an arched structure, and the dustproof nets (2) are arranged on both sides. The spray pipe (3) is arched and installed on one side of the top of the full-section water curtain frame (1), and the spray head of the spray pipe (3) is installed toward the dustproof net (2) near the top. The full-section water curtain frame (1) is provided with a gap (7) at the conveyor belt (4), and a door (5) is provided near the middle. A water collecting trough (6) is provided on the ground facing the full-section water curtain (1), and the dustproof net (2) is arranged at all except the gap (7).

2. A dust prevention device for underground mine tunnels according to claim 1, characterized in that: A water collecting pan (8) is installed above the conveyor belt (4), the water collecting pan (8) is directly opposite to the notch (7), and is wider than the belt of the conveyor belt (4). A drainage pipe (9) is arranged at the bottom of the water collecting pan (8), and the drainage pipe (9) is connected to the water collecting tank (6).

3. A dust prevention device for underground mine tunnels according to claim 2, characterized in that: Two inverted U-shaped support frames (10) are arranged at the bottom of the water collecting tray (8). The lower ends of the two support frames (10) are fixedly connected on the same side by channel steels (11) with the grooves facing downwards. The two channel steels (11) are respectively clamped to two roller support rods (15) arranged on both sides of the conveyor belt (4).

4. A dust prevention device for underground mine tunnels according to claim 1, characterized in that: The full-section water curtain frame (1) is formed into a straight wall semicircular arch shape by using four-pronged pipes to be detachably fixed and connected horizontally and vertically.

5. The dust prevention device for underground mine tunnels according to claim 1, characterized in that: The spray pipe (3) is fixedly connected to the top plate (12) of the tunnel, and the spray pipe (3) is connected to a water pump through a pipeline.

6. A dust prevention device for underground mine tunnels according to claim 5, characterized in that: It also includes a dust sensor (13), which is installed on the top of the lane in front of the water curtain.

7. A dust prevention device for underground mine tunnels according to claim 6, characterized in that: The dust sensor (13) is electrically connected to the controller, and the controller is connected to the water pump.

8. The dust prevention device for underground mine tunnels according to claim 5, characterized in that: It also includes a passerby identification module installed on the top of the lane in front of the water curtain, and the passerby identification module is connected to the controller.

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