Coal mine cantilever type heading machine with roadway closed dust removal function and heading method

Abstract

The invention discloses a coal mine cantilever type heading machine with roadway closed dust removal and a heading method.The coal mine cantilever type heading machine comprises a vehicle body, a cutting mechanism used for heading head-on coal rock cutting is arranged on the front side of the vehicle body, and walking mechanisms are installed on the two sides of the vehicle body; a vehicle-mounted flexible filling system used for head-on dust blocking is integrally arranged in the middle of the vehicle body, the vehicle-mounted flexible filling system comprises flexible filler arranged in the middle of the vehicle body, and the flexible filler can block the space between the coal mine cantilever type heading machine and the roadway boundary contour after being inflated. The coal mine tunneling roadway head-on machine has the advantages of being good in dust control effect, convenient to move and operate, good in roadway adaptability and the like, the technical problem of head-on dust control of a coal mine tunneling working face can be solved, and the working environment of the tunneling working face is improved.

Description

Technical Field

[0001] This invention belongs to the field of tunnel excavation technology, and specifically relates to a cantilever tunneling machine and tunneling method for coal mines with tunnel enclosure and dust removal. Background Technology

[0002] In recent years, the level of mechanization in coal mining has improved significantly. However, the dust generated during coal mining still poses a serious threat to the health of coal miners. Tunneling is a crucial part of coal mine production. The tunneling face has a small cross-section and low airflow, making it difficult for dust generated during tunneling to be discharged with the airflow, causing serious impacts on personnel and the environment. Dust suppression measures are necessary to reduce the dust concentration within the tunneling face. Currently, dust collectors mainly use dust-collecting fans to draw dust-laden air from the tunneling face into a dust collector for treatment before discharging clean air. Dust collectors operate on two principles: dry and wet. Dry dust collectors are suitable for rock tunneling, while wet dust collectors are suitable for coal mine tunneling. Both types of dust collectors can achieve dust removal efficiencies of over 90%. However, because dust spreads rapidly at the tunneling face, the overall dust removal efficiency at the tunneling face is not ideal.

[0003] Dust control technologies at the coal mine tunneling face mainly include water curtain dust control and air wall dust control. Water curtain dust control consumes a large amount of water and easily causes water accumulation on the floor of the tunneling face, leading to equipment malfunction. Air wall dust control involves high labor intensity for workers and its effectiveness is generally limited. Therefore, there is an urgent need to develop a cantilever tunneling machine and tunneling method for coal mines with enclosed roadway dust removal. Summary of the Invention

[0004] To solve the technical problem of dust control at the face of coal mine tunneling and improve the working environment of the tunneling face, this invention provides a coal mine cantilever tunneling machine and tunneling method with roadway enclosed dust removal, which has the characteristics of good dust control effect, convenient mobile operation and good roadway adaptability.

[0005] The technical solution adopted in this invention is a coal mine cantilever tunneling machine with roadway sealing and dust removal. The coal mine cantilever tunneling machine includes a body body. A cutting mechanism for cutting coal and rock at the tunneling face is set on the front side of the body body. Traveling mechanisms are installed on both sides of the body body. An onboard flexible filling system for sealing dust at the tunnel face is integrated in the middle of the body body. The onboard flexible filling system includes a flexible filling material set in the middle of the body body. After the flexible filling material is inflated, it can seal the space between the coal mine cantilever tunneling machine and the roadway boundary outline.

[0006] Furthermore, the flexible filling material is in the shape of a gate, with the inner side of the gate fixedly connected to the upper and both sides of the coal mine cantilever tunneling machine, and the outer side of the gate abutting against the roadway roof and side walls after inflation.

[0007] Furthermore, the flexible filling material comprises multiple vertically divided transverse air chambers.

[0008] Furthermore, the flexible filling material has an air inlet that is sequentially connected to an air pressure gauge, an air inlet valve, and an air compressor, and an air vent that is sequentially connected to an air extraction valve and a vacuum pump.

[0009] Furthermore, it includes an airborne dust removal system for handling dust at the tunnel face. The airborne dust removal system includes a dust collector installed on top of the vehicle body, a dust removal fan connected to the rear outlet of the dust collector, a dust removal duct connected to the front inlet of the dust collector, and an air intake assembly installed at the front end of the dust removal duct. The air intake assembly is arranged in the tunnel face direction.

[0010] Furthermore, a dust collector bracket assembly is installed below the dust collector and fixedly connected to the vehicle body.

[0011] Furthermore, a shovel is provided on the lower front side of the vehicle body, a transport system is provided on the central axis of the vehicle body, and a rear support assembly is provided on the rear side of the vehicle body.

[0012] Furthermore, a slewing mechanism is provided on the upper front side of the vehicle body. The slewing mechanism is connected and fixed to the cutting mechanism. The cutting mechanism includes a longitudinal axis cutting head, a cantilever section, a cutting reducer, a connecting cylinder, and a cutting motor. The cutting motor and the cutting reducer are fixed on the connecting cylinder, the cantilever section is fixed on the cutting reducer, and the longitudinal axis cutting head is fixed on the cantilever section. The cantilever section drives the longitudinal axis cutting head to rotate, thereby realizing mechanical rock breaking.

[0013] The cantilever tunneling machine for coal mines of the present invention has the following beneficial effects: 1. The roadway sealing and dust removal device is integrated into the body of the coal mine cantilever tunneling machine. It can move forward or backward with the coal mine cantilever tunneling machine without affecting the flexibility of the coal mine cantilever tunneling machine. It has good roadway adaptability and wide application range. It uses flexible filling material to physically seal the tunneling face, which has a good dust diffusion prevention effect and high comprehensive dust removal efficiency. 2. The onboard flexible filling system includes an air compressor and a vacuum pump, which can quickly inflate the flexible filling material to achieve rapid roadway sealing and prevent dust diffusion, and can also quickly evacuate the flexible filling material to ensure that the flexible filling material is firmly adhering to the machine body. The operation is simple and does not affect the normal operation of the coal mine cantilever tunneling machine. 3. The dust removal fan is located behind the dust collector, ensuring that the air drawn in by the dust removal fan is clean air that has been treated by the dust collector, resulting in a low failure rate of the dust removal fan.

[0014] The present invention also provides a tunneling method using the above-mentioned coal mine cantilever tunneling machine, comprising the following steps: First, the coal mine cantilever tunneling machine is positioned in the roadway, and the shovel plate and the rear support assembly are placed on the ground, so that the shovel plate, the rear support assembly and the traveling mechanism contact the roadway floor together; Then, start the air compressor, open the air intake valve, and quickly inflate the flexible filling material. After the flexible filling material is inflated, it expands and seals the space between the coal mine cantilever tunneling machine and the roadway boundary outline, thus physically separating the tunneling face space from the space behind it. Then, the dust removal fan is turned on, and the dust-laden air is drawn into the dust collector for purification through the air intake assembly located at the tunnel face. Finally, the cutting motor is turned on to carry out the tunneling machine cutting operation.

[0015] Furthermore, when the coal mine cantilever tunneling machine stops cutting and prepares to move forward or backward, the air intake valve is closed, the air compressor is turned off, the air extraction valve is opened, and the vacuum pump is turned on to extract the air from the flexible filling material and adsorb the flexible filling material onto the machine body.

[0016] The tunneling method uses the aforementioned cantilever tunneling machine for coal mines, and the beneficial effects are the same, so they will not be repeated here. Attached Figure Description

[0017] Figure 1 For the sake of the present invention Figure 1 ; Figure 2 Top view of the present invention Figure 1 ; Figure 3 This is a schematic diagram of the airborne flexible filling system of the present invention; Figure 4 This is a schematic diagram of the airborne dust removal system of the present invention; Figure 5 For the sake of the present invention Figure 2 ; Figure 6 Top view of the present invention Figure 2 ; Figure 7 This is a front view of the cutting mechanism of the present invention; Figure 8 This is a schematic diagram of the tunnel face sealing of the present invention.

[0018] In the diagram: 1-Airborne flexible filling system; 1.1-Flexible filling material; 1.2-Inlet pressure gauge; 1.3-Inlet valve; 1.4-Air compressor; 1.5-Vacuum pump; 1.6-Extraction valve; 2-Airborne dust removal system; 2.1-Dust removal fan; 2.2-Dust collector; 2.3-Dust removal duct; 2.4-Dust removal support assembly; 3-Coal mine cantilever roadheader; 3.1-Cutting mechanism; 3.1.1-Longitudinal axis cutting head; 3.1.2-Cantilever section; 3.1.3- 3.1.4 - Cutting reducer; 3.1.5 - Cutting motor; 3.2 - Shovel; 3.3 - Cutting lifting cylinder; 3.4 - Rotation mechanism; 3.5 - Shovel lifting cylinder; 3.6 - Traveling mechanism; 3.7 - Hydraulic system; 3.8 - Protective assembly; 3.9 - Vehicle body; 3.10 - Rear support assembly; 3.11 - Cutting left and right swing cylinder; 3.12 - Driver's cab; 3.13 - Electrical system; 3.14 - Transportation system; 4 - Air intake assembly. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this invention, the following detailed description, in conjunction with the accompanying drawings, provides an example of a cantilever tunneling machine with enclosed dust removal system for coal mines and its tunneling method.

[0020] like Figure 1 and Figure 2 As shown, a coal mine cantilever roadway dust removal system 3 is used for cutting coal and rock at the tunneling face and loading and transporting slag. It includes an onboard flexible filling system 1, an onboard dust removal system 2, and a suction port assembly 4 integrated with the body of the coal mine cantilever roadway 3 for dust control and treatment at the tunneling face, and can move forward or backward with the coal mine cantilever roadway 3.

[0021] like Figure 3 As shown, the airborne flexible filling system 1 includes a flexible filling material 1.1, an air pressure gauge 1.2, an air inlet valve 1.3, an air compressor 1.4, a vacuum pump 1.5, and an extraction valve 1.6. The flexible filling material 1.1 is generally U-shaped, including multiple vertically divided transverse air chambers. The inner side of the U-shape is fixedly connected to the upper and sides of the cantilever tunneling machine 3, and the outer side of the U-shape abuts against the tunnel roof and side walls after inflation. The flexible filling material 1.1 is equipped with an air inlet connected to the air pressure gauge 1.2, the air inlet valve 1.3, and the air compressor 1.4 in sequence. The flexible filling material 1.1 is equipped with an air vent connected to the extraction valve 1.6 and the vacuum pump 1.5 in sequence. The air compressor 1.4 and the vacuum pump 1.5 can quickly inflate the flexible filling material 1.1 to achieve rapid tunnel sealing and prevent dust diffusion, and can also quickly extract air from the flexible filling material 1.1 to ensure that the flexible filling material 1.1 is firmly adhered to the machine body.

[0022] like Figure 4As shown, the airborne dust removal system 2 includes a dust removal fan 2.1, a dust collector 2.2, a dust removal duct 2.3, and a dust removal support assembly 2.4. The dust collector 2.2 is fixedly installed above the coal mine cantilever roadheader 3 via the dust removal support assembly 2.4 at its lower end. The dust removal fan 2.1 is located behind the dust collector 2.2 and connected to the air outlet, ensuring that the air drawn in by the dust removal fan 2.1 is all clean air processed by the dust collector 2.2. The air inlet at the front of the dust collector 2.2 is connected to the dust removal duct 2.3, and the air intake assembly 2.4 is located at the front end of the dust removal duct 2.3, facing the tunneling face.

[0023] like Figure 5 and Figure 6 As shown, the coal mine cantilever roadheader 3 includes a cutting mechanism 3.1, a shovel 3.2, a cutting lifting cylinder 3.3, a slewing mechanism 3.4, a shovel lifting cylinder 3.5, a traveling mechanism 3.6, a hydraulic system 3.7, a protective assembly 3.8, a vehicle body 3.9, a rear support assembly 3.10, a cutting left and right swing cylinder 3.11, a driver's cab 3.12, an electrical system 3.13, and a transportation system 3.14. The cutting mechanism 3.1 is used for crushing the coal and rock at the face. The cutting mechanism 3.1 is connected to the slewing mechanism 3.4, and the cutting head swings up and down and left and right through two cutting lifting cylinders 3.3 and two cutting left and right swing cylinders 3.11, thereby cutting out the required cross-sectional profile. The shovel 3.2 is used to load the material cut by the cutting mechanism 3.1. The shovel 3.2 is connected to the vehicle body 3.9, and the shovel is raised and lowered via the shovel lifting cylinder 3.5. The hydraulic system 3.7 consists of a hydraulic pump, hydraulic valves, hydraulic motors, hydraulic hoses, etc., providing power to the shovel 3.2, the traveling mechanism 3.6, the transport system 3.14, and each hydraulic cylinder. The protective assembly 3.8 provides protective covers or nets for each component of the tunneling machine. The traveling mechanism 3.6 is mounted on the vehicle body 3.9 and is used for the movement and adjustment of the tunneling machine. The driver's cab 3.12 is located at the left rear of the vehicle body 3.9, providing space and operating handles for the driver. The electrical system 3.13 consists of electrical components such as motors, control boxes, and lights, and is used for the control and protection of the cutting mechanism 3.1, the hydraulic system 3.7, and other auxiliary components. The transport system 3.14 is located in the middle of the machine and is used for the transfer of materials cut by the cutting mechanism 3.1.

[0024] like Figure 7As shown, the cutting mechanism 3.1 includes a longitudinal axis cutting head 3.1.1, a cantilever section 3.1.2, a cutting reducer 3.1.3, a connecting cylinder 3.1.4, and a cutting motor 3.1.5. Both the cutting motor 3.1.5 and the cutting reducer 3.1.3 are fixed to the connecting cylinder 3.1.4. The cutting motor 3.1.5 is the power source for the mechanical rock-breaking system, and the cutting reducer 3.1.3 converts the power from the cutting motor 3.1.5 into low-speed, high-torque power that meets the requirements for rock breaking. The cantilever section 3.1.2 is fixed to the cutting reducer 3.1.3, transmitting the output torque of the cutting reducer 3.1.3 to the longitudinal axis cutting head 3.1.1. The longitudinal axis cutting head 3.1.1 is fixed to the cantilever section 3.1.2, and the cantilever section 3.1.2 drives the longitudinal axis cutting head 3.1.1 to rotate, thus achieving mechanical rock breaking. The torque transmission path of the mechanical rock breaking system is as follows: cutting motor 3.1.5 → cutting reducer 3.1.3 → cantilever section 3.1.2 → cutting head 3.1.1.

[0025] like Figure 8 As shown, when the cantilever roadheader 3 is positioned and cutting, the onboard flexible filling system 1 starts the air compressor 1.4 and opens the air inlet valve 1.3 to quickly inflate the flexible filling material 1.1. The inflated flexible filling material 1.1 expands, sealing the space between the cantilever roadheader 3 and the roadway boundary, physically isolating the space at the tunnel face from the space behind it, and preventing the spread of dust generated during cutting. After sealing the tunnel face, the dust removal fan 2.1 is turned on, and the dust-laden air is drawn into the dust collector 2.2 for purification through the suction port assembly 4 located at the tunnel face. When the cantilever roadheader 3 stops cutting and prepares to move forward or backward, the air inlet valve 1.3 is closed, the air compressor 1.4 is turned off, the exhaust valve 1.6 is opened, and the vacuum pump 1.5 is turned on to extract the air from the flexible filling material 1.1 and adsorb the flexible filling material 1.1 onto the machine body.

[0026] A tunneling method using the aforementioned coal mine cantilever tunneling machine 3 includes the following steps: First, the coal mine cantilever tunneling machine 3 is positioned in the roadway, and the shovel 3.2 and rear support assembly 3.10 are lowered to the ground, so that the shovel 3.2, the rear support assembly 3.10, and the traveling mechanism 3.6 all contact the roadway floor. Then, start the air compressor 1.4, open the air intake valve 1.3, and quickly inflate the flexible filling material 1.1. After the flexible filling material 1.1 is inflated, it expands and seals the space between the coal mine cantilever tunneling machine 3 and the roadway boundary outline, realizing the physical isolation between the tunneling face space and the rear space, and preventing the dust generated when the cutting head is cutting. Subsequently, after the tunnel face is sealed, the dust removal fan 2.1 is turned on, and the dust-laden air is drawn into the dust collector 2.2 for purification through the air intake assembly 4 arranged at the tunnel face.

[0027] Finally, start the cutting motor 3.1.5 to carry out the tunneling machine cutting operation.

[0028] When the coal mine cantilever tunneling machine 3 stops cutting and prepares to move forward or backward, close the air intake valve 1.3, turn off the air compressor 1.4, open the air extraction valve 1.6, and turn on the vacuum pump 1.5 to extract the air from the flexible filling material 1.1 and adsorb the flexible filling material 1.1 onto the machine body.

[0029] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A cantilever tunneling machine for coal mines with enclosed dust removal system, characterized in that, The coal mine cantilever tunneling machine (3) includes a body body (3.9), a cutting mechanism (3.1) for cutting coal and rock at the tunnel face is provided on the front side of the body body (3.9), a walking mechanism (3.6) is installed on both sides of the body body (3.9), and an onboard flexible filling system (1) for sealing the dust at the tunnel face is integrated in the middle of the body body (3.9). The onboard flexible filling system (1) includes a flexible filling material (1.1) set in the middle of the body body (3.9). After the flexible filling material (1.1) is inflated, it can seal the space between the coal mine cantilever tunneling machine (3) and the roadway boundary outline.

2. The cantilever tunneling machine with enclosed dust removal system for coal mines according to claim 1, characterized in that, The flexible filling material (1.1) is in the shape of a door. The inner side of the door is fixedly connected to the upper and both sides of the body of the coal mine cantilever tunneling machine (3). The outer side of the door abuts against the top plate and the side plates of the roadway after being inflated.

3. The cantilever tunneling machine with enclosed dust removal system for coal mines according to claim 2, characterized in that, The flexible filling (1.1) comprises multiple vertically divided transverse air chambers.

4. The cantilever tunneling machine with enclosed dust removal system for coal mines according to claim 2 or 3, characterized in that, The flexible filling material (1.1) is provided with an air inlet and connected in sequence to an air pressure gauge (1.2), an air inlet valve (1.3) and an air compressor (1.4). The flexible filling material (1.1) is provided with an air vent and connected in sequence to an air extraction valve (1.6) and a vacuum pump (1.5).

5. The cantilever tunneling machine with enclosed dust removal system for coal mines according to claim 4, characterized in that, The system includes an airborne dust removal system (2) for handling dust at the tunnel face. The airborne dust removal system (2) includes a dust collector (2.2) installed on the top of the vehicle body (3.9). The rear air outlet of the dust collector (2.2) is connected to a dust removal fan (2.1), and the front air inlet of the dust collector (2.1) is connected to a dust removal duct (2.3). An air intake assembly (4) is installed at the front end of the dust removal duct (2.3). The air intake assembly (4) is arranged in the tunnel face direction.

6. The cantilever tunneling machine for coal mines with enclosed dust removal system according to claim 5, characterized in that, A dust collector bracket assembly (2.4) is installed below the dust collector (2.2) and fixedly connected to the vehicle body (3.9).

7. The cantilever tunneling machine for coal mines with enclosed dust removal system according to claim 6, characterized in that, A shovel (3.2) is provided on the lower front side of the body body (3.9), a transport system (3.14) is provided on the central axis of the body body (3.9), and a rear support assembly (3.10) is provided on the rear side of the body body (3.9).

8. The cantilever tunneling machine for coal mines with enclosed dust removal system according to claim 7, characterized in that, A rotating mechanism (3.4) is provided on the upper front side of the vehicle body (3.9). The rotating mechanism (3.4) is connected and fixed to the cutting mechanism (3.1). The cutting mechanism (3.1) includes a longitudinal axis cutting head (3.1.1), a cantilever section (3.1.2), a cutting reducer (3.1.3), a connecting cylinder (3.1.4), and a cutting motor (3.1.5). The cutting motor (3.1.5) and the cutting reducer (3.1.3) are fixed on the connecting cylinder (3.1.4), and the cantilever section (3.1.2) is fixed on the cutting reducer (3.1.4). On 3.1.3), the longitudinal axis cutting head (3.1.1) is fixed on the cantilever section (3.1.2), and the cantilever section (3.1.2) drives the longitudinal axis cutting head (3.1.1) to rotate, thereby realizing mechanical rock breaking.

9. A tunneling method, characterized in that, The coal mine cantilever tunneling machine (3) described in claim 8 includes the following steps: First, the coal mine cantilever tunneling machine (3) is positioned in the roadway, and the shovel plate (3.2) and the rear support assembly (3.10) are placed on the ground, so that the shovel plate (3.2), the rear support assembly (3.10) and the traveling mechanism (3.6) contact the roadway floor together; Then, start the air compressor (1.4), open the air intake valve (1.3), and quickly inflate the flexible filling material (1.1). After the flexible filling material (1.1) is inflated, it expands and seals the space between the coal mine cantilever tunneling machine (3) and the roadway boundary outline, thus achieving physical separation between the tunneling face space and the rear space. Then, the dust removal fan (2.1) is turned on, and the dust-laden air is drawn into the dust collector (2.2) for purification through the air intake assembly (4) arranged at the tunnel face; Finally, turn on the cutting motor (3.1.5) to carry out the tunneling machine cutting operation.

10. The tunneling method according to claim 9, characterized in that, When the coal mine cantilever tunneling machine (3) stops cutting and prepares to move forward or backward, close the air intake valve (1.3), turn off the air compressor (1.4), open the air extraction valve (1.6), turn on the vacuum pump (1.5), extract the air from the flexible filler (1.1), and adsorb the flexible filler (1.1) onto the machine body.

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