Dust blocking method for working space of fully-mechanized face personnel

Abstract

The invention discloses a dust blocking method for a working space of fully-mechanized face personnel, and belongs to the technical field of coal mine dust treatment. The invention provides a comprehensive blocking scheme for solving the problems that in the prior art, fully-mechanized face dust is high in concentration and serious in diffusion, and workers are prone to suffering from pneumoconiosis. According to the method, a wireless dust source tracking spraying device is arranged on the outer side of a coal mining machine, and dust generated by coal cutting is settled and guided; a coal mining area and a personnel activity area are physically separated by utilizing an efficient dust blocking and isolating device on the hydraulic support; a negative-pressure micro-mist dust remover is arranged in front of a stand column of a top beam of the support to suck and purify dust near the top beam; and a support dust receiving device is installed on the hydraulic support and used for collecting dust generated by descending the column and moving the support. The method can effectively reduce the dust concentration in the working space of workers on the fully-mechanized coal mining face, reduces the risk of pneumoconiosis of miners, and provides convenience for source-divided and domain-divided treatment of dust on the fully-mechanized coal mining face.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine dust control and relates to a method for blocking dust in a working space of personnel in a fully mechanized mining face. Background Art

[0002] The fully-mechanized mining face is the core area of ​​coal mine production and is also a severely affected area of ​​dust pollution. Long-term work in an environment with high concentrations of dust greatly increases the risk of miners suffering from pneumoconiosis. According to statistics, pneumoconiosis is one of the most serious occupational diseases in my country, which brings great pain and economic burden to patients and their families, and also brings heavy pressure to society. Therefore, it is of great social significance to effectively control the dust in the fully-mechanized mining face and protect the health of miners.

[0003] The main source of dust in the fully mechanized mining face is the coal cutting by the shearer drum, followed by the lowering and moving of the hydraulic support. In the process of high-speed rotation and cutting of the coal body, the shearer will generate a large amount of coal dust. These coal dust particles are small and highly suspended, and can easily spread to the entire working face. According to on-site measurements, without any dust prevention and control measures, the dust concentration in the fully mechanized mining face can reach up to 3000mg / m 3 , far exceeding the national occupational health standards, seriously affecting the physical and mental health of workers.

[0004] At present, the dust control measures for comprehensive mining face mainly include spray dust suppression, ventilation dust removal, personal protection, etc. Spray dust suppression is the most commonly used method, which increases the weight of dust particles and makes them settle by spraying water mist or chemical dust suppressants. Ventilation dust removal uses wind flow to dilute and discharge dust from the working face. Personal protection refers to workers wearing protective equipment such as dust masks to reduce dust inhalation. However, these measures have certain limitations in practical applications. For example, the effect of spray dust suppression is affected by factors such as water quality, spray volume, and spray angle, and it is easy to cause excessive humidity on the working face; ventilation dust removal requires a strong ventilation system support, which is relatively costly; the comfort and protection effect of individual protection are often difficult to take into account.

[0005] In addition, the dust generated by the coal-cutting drum of the coal-cutting machine can easily spread to the pedestrian area under the influence of high wind flow, especially the dust generated by the middle drum cutting coal. At present, there is no good control measure for this part of the diffused dust, making it difficult to effectively control the dust concentration in the working space of personnel inside the support. At the same time, the dust generated during the lowering and moving of the hydraulic support will also spread to the personnel activity area due to the lack of effective collection and treatment methods, further aggravating the dust pollution.

[0006] In response to the above problems, some improvement schemes have also appeared in the prior art. For example, some mines use mobile spray devices to move with the coal mining machine to carry out concentrated spraying on the coal cutting points. Other mines try to use new dust removal equipment, such as high-voltage electrostatic precipitators, wet dust collectors, etc., to improve the dust removal efficiency. However, these schemes often have problems such as complex equipment, high cost, and difficult maintenance, and are difficult to be widely used in large-height fully-mechanized mining faces. In addition, the prior art rarely considers targeted blocking of dust sources, but focuses on the control of dust after diffusion, resulting in poor control effects. The prior art also rarely considers the effective isolation of coal mining space from personnel activity areas, which is not conducive to the source-based and domain-based control of dust in fully-mechanized mining faces. Summary of the invention

[0007] In view of this, the purpose of the present invention is to solve the above-mentioned problems and provide a method for blocking dust in the working space of personnel in a fully mechanized mining face, so as to effectively prevent the dust from cutting coal by coal mining machines in fully mechanized mining faces with large mining heights and the dust from lowering columns and moving frames of hydraulic supports from spreading and polluting the working space of personnel inside the supports, completely eliminating the risk of pneumoconiosis among coal mine workers, and at the same time, by separating the coal mining space from the personnel activity area, providing convenience for the source and area-based dust control in the fully mechanized mining face.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A method for blocking dust in the working space of personnel in a fully mechanized mining face, wherein multiple blocking measures are established simultaneously in a parallel direction of a fully mechanized mining face with a large mining height, so as to separate the working area of ​​a coal mining machine in the fully mechanized mining face with a large mining height from the working space of personnel inside a hydraulic support, and to block the coal cutting dust of the coal mining machine and the dust of the hydraulic support column lowering and frame moving from spreading to pollute the working space of personnel inside the support; the blocking measures include:

[0010] a. Blocking the dust from cutting coal by the shearer: A wireless dust source tracking spray device is arranged on the chute baffle plate outside the shearer to effectively settle the dust generated by the shearer drum cutting coal, and the shearer cutting dust is guided to move to the leeward coal wall by the induced effect of the downwind spray, preventing the dust from spreading to the working space of personnel inside the support;

[0011] b. Separation of coal mining space from personnel activity area: Use the high-efficiency dust-blocking and dust-isolating device installed on the hydraulic support to physically separate the coal mining machine working area from the personnel activity area, thereby blocking the dust generated by the coal mining machine from the personnel activity area, preventing the dust generated by the coal mining machine from polluting the personnel activity area;

[0012] c. Hydraulic support top beam dust extraction and purification: A negative pressure mist dust collector is arranged in front of the support top beam column, and the negative pressure generated by it is used to extract and purify the dust near the support top beam to prevent the dust from spreading from the top beam to the personnel working space. At the same time, the wind of the negative pressure mist dust collector is used to transport the mist to purify the floating dust in the coal mining space;

[0013] d. Dust collection during hydraulic support column lowering and frame moving: A support dust collection device is arranged on the hydraulic support shielding beam to collect the dust directly generated by column lowering and frame moving, and directly introduce the dust generated by the support column lowering and frame moving into the goaf.

[0014] Furthermore, the wireless dust source tracking spray device includes a laser dust sensor, a wireless controller and an intelligent dust suppression device; the laser dust sensor is respectively arranged in front of, above and behind the rocker arm; the intelligent dust suppression device is installed on the chute baffle, and sprays through an integrated solenoid valve and nozzle, and the wireless controller automatically adjusts the spray frequency, intensity and range according to different positions and different dust concentrations.

[0015] Furthermore, the wireless dust source tracking spray device always maintains an inclination with the coal mining machine and sprays in the direction of the wind flow.

[0016] Furthermore, the high-efficiency dust-blocking and dust-isolating device is a roller curtain structure, including a control box, a motor, a reel, a high-efficiency dust-isolating film and a flexible guide rail, and the high-efficiency dust-isolating film is made of a transparent non-sticky dust material; the control box is connected to the motor and is arranged on the hydraulic support; the reel is connected to the motor and rotates under the drive of the motor; the high-efficiency dust-isolating film is connected to the flexible guide rails on both sides, and one end of the flexible guide rail is connected to the reel, and the high-efficiency dust-isolating film can be rolled up and unfolded under the rotation of the reel, and the high-efficiency dust-isolating film separates the working area of ​​the coal mining machine from the personnel activity area when it is unfolded; the control box is connected to the electro-hydraulic control system of the hydraulic support and is controlled by it.

[0017] Furthermore, the high-efficiency dust-blocking and dust-isolating device also includes a box cover and a nozzle; the reel and the motor are both arranged in the box cover, the box cover is provided with an opening, and the high-efficiency dust-isolating membrane extends from the opening; the nozzle is arranged at the lower end of the box cover, arranged toward the direction of the high-efficiency dust-isolating membrane, and is used for spraying and flushing the high-efficiency dust-isolating membrane.

[0018] Furthermore, the negative pressure micro-mist dust collector is installed in front of the hydraulic support top beam column and arranged toward the coal wall side. The negative pressure airflow it generates sucks the dust near the support top beam, and uses the negative pressure airflow to blow micro-mist to purify the suspended dust in the coal mining space.

[0019] Furthermore, the support dust collecting device is arranged downwardly tilted between two adjacent hydraulic supports, and is used to collect dust generated during the support column lowering and frame moving process and introduce it into the goaf.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention combines multiple measures such as spray dust reduction, high-efficiency dust isolation, negative pressure micro-mist dust removal and support dust collection. By installing a wireless dust source tracking spray device on the outside of the coal mining machine, the dust generated by the coal cutting drum of the coal mining machine can be timely settled and guided to prevent the dust from spreading to the inside of the support along the wind. The high-efficiency dust blocking and dust isolation device on the hydraulic support is used to physically separate the coal mining operation area from the personnel activity area, and the dust is prevented from spreading to the operating personnel area from the source. The negative pressure micro-mist dust collector arranged in front of the top beam of the hydraulic support is used to achieve suction and purification of the floating dust near the top beam. At the same time, the dust in the coal mining space is purified by micro-mist, and the dust from the coal cutting of the coal mining machine and the dust from the lowering of the column and the moving of the hydraulic support are controlled by source and area, and the overall control effect is more significant.

[0022] 2. The wireless dust source tracking spray device of the present invention is equipped with a laser dust sensor and a wireless controller, which can monitor the dust concentration in real time and automatically adjust the spray frequency, intensity and range to ensure the best spray dust reduction effect. The wireless dust source tracking spray device always maintains an inclination with the coal mining machine and sprays in the direction of the wind flow, which enhances the spray induced effect and effectively blocks the dust diffusion.

[0023] 3. The present invention adopts a rolling curtain type high-efficiency dust-blocking and dust-isolating device and intelligent control technology, which not only does not affect the sight of operators, but also can flexibly adjust the partition mode, thereby improving the adaptability of the site and the possibility of application and promotion.

[0024] 4. The present invention provides favorable conditions for subsequent more refined dust control by separating the coal mining space from the personnel activity area, thereby reducing the health risks and social and economic burden caused by dust. Compared with traditional spraying, strong ventilation and individual protection measures, the present invention is simpler in equipment structure, relatively low in cost, easy to maintain, and suitable for complex working environments such as fully mechanized mining faces with large mining heights.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 A side view of the equipment arrangement for the dust blocking method for the working space of personnel in a fully mechanized mining face according to the present invention.

[0028] Figure 2 This is the front view of the equipment layout in the present invention.

[0029] Figure 3 This is a top view of the equipment layout of the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the high-efficiency dust blocking and isolation device in the present invention.

[0031] Figure 5 This is a schematic diagram of the installation position of the high-efficiency dust blocking and isolation device in the present invention.

[0032] Figure 6 Schematic diagram of the rolling and unfolding of the high-efficiency dust-proof film.

[0033] Figure numerals: 1-hydraulic support; 2-support dust collecting device; 3-negative pressure micro-mist dust collector; 4-high-efficiency dust blocking and isolation device; 5-coal mining machine; 6-wireless dust source tracking spray device; 7-chute baffle; 41-control box; 42-motor; 43-reel; 44-box cover; 45-nozzle; 46-high-efficiency dust isolation membrane; 47-flexible guide rail. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0035] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] See also Figures 1 to 6 A method for blocking dust in the working space of personnel in a fully mechanized mining face. A variety of blocking measures are established simultaneously in the parallel direction of the fully mechanized mining face with large mining height to separate the working area of ​​a coal mining machine 5 in the fully mechanized mining face with large mining height from the working space of personnel inside a hydraulic support 1, so as to block the coal cutting dust of the coal mining machine and the dust from lowering columns and moving frames of the hydraulic support from spreading and polluting the working space of personnel inside the support.

[0038] Specific blocking measures include:

[0039] a. Coal cutting machine coal dust blocking:

[0040] A set of wireless dust source tracking spray device 6 is installed on the chute baffles 7 on both sides of the drum of the coal mining machine 5. The wireless dust source tracking spray device 6 includes a laser dust sensor, a wireless controller and an intelligent dust suppression device; the laser dust sensors are installed in front of, above and behind the rocker arm respectively; the intelligent dust suppression device is installed on the chute baffle 7, and sprays through an integrated electromagnetic valve and nozzle 45; the wireless controller automatically adjusts the spray frequency, intensity and range according to different positions and different dust concentrations to ensure that the spray is always inclined with the coal mining machine 5 and in the direction of the wind flow.

[0041] b. Separation of coal mining space and personnel activity area:

[0042] A rolling curtain type high-efficiency dust-blocking and dust-isolating device 4 is installed on the hydraulic support 1. The high-efficiency dust-blocking film 46 is made of transparent non-sticky dust material and does not affect the sight of personnel. Among them, the high-efficiency dust-blocking and dust-isolating device 4 is a rolling curtain type structure, including a control box 41, a motor 42, a reel 43, a box cover 44, a nozzle 45, a high-efficiency dust-blocking film 46 and a flexible guide rail 47. The high-efficiency dust-blocking film 46 is made of transparent non-sticky dust material; the control box 41 is connected to the motor 42 and installed on the hydraulic support 1; the reel 43 is connected to the motor 42 and rotates under the drive of the motor; the two sides of the high-efficiency dust-blocking film 46 are connected to the flexible guide rail 47, and one end of the flexible guide rail 47 is connected to the reel 43, and the high-efficiency dust-blocking film 46 is rolled up and unfolded under the rotation of the reel 43, and the high-efficiency dust-blocking film 46 separates the working area of ​​the coal mining machine 5 from the personnel activity area when it is unfolded. The control box 41 is connected to the electro-hydraulic control system of the hydraulic support 1 to realize remote control. The reel 43 and the motor 42 are both installed in the box cover 44. The box cover 44 is provided with an opening, and the high-efficiency dust-proof film 46 extends from the opening; the nozzle 45 is installed at the lower end of the box cover 44, arranged in the direction of the high-efficiency dust-proof film 46, and is used to spray and wash the high-efficiency dust-proof film 46. When the coal mining machine 5 passes by, the control system controls the motor 42 to drive the reel 43, unfold the high-efficiency dust-proof film 46, and form a physical partition to separate the working area of ​​the coal mining machine 5 from the personnel activity area. When the coal mining machine 5 is inspected and repaired, the high-efficiency dust-proof film 46 is retracted.

[0043] c. Dust extraction and purification of hydraulic support top beam:

[0044] A negative pressure mist dust collector 3 is arranged in front of the support top beam column and toward the coal wall side. After the dust collector is started, a negative pressure airflow is generated to suck the dust near the support top beam. At the same time, the negative pressure airflow is used to blow mist to purify the floating dust in the coal mining space.

[0045] d. Hydraulic support lowering column moving frame dust collection:

[0046] Between two adjacent hydraulic supports 1, a support dust collecting device 2 is installed downwardly to form a dust collecting slope. When the hydraulic support 1 is lowered and moved, the generated dust is collected by the support dust collecting device 2 and slides into the goaf along the slope to prevent dust from spreading.

[0047] After the implementation of the above plan, the dust concentration in the fully mechanized mining working surface was continuously monitored. The results showed that the dust concentration in the working space inside the support was reduced by more than 80% on average, effectively improving the working environment.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for blocking dust in the working space of fully mechanized mining face personnel, characterized in that: Along the parallel direction of the fully-mechanized mining face with large mining height, multiple blocking measures are established at the same time to separate the coal mining machine operation area of ​​the fully-mechanized mining face with large mining height from the personnel operation space inside the hydraulic support, and to prevent the coal mining machine cutting dust and the hydraulic support column lowering and frame moving dust from spreading and polluting the personnel operation space inside the support; the blocking measures include: a. Blocking the dust from cutting coal by the shearer: A wireless dust source tracking spray device is arranged on the chute baffle plate outside the shearer to effectively settle the dust generated by the shearer drum cutting coal, and the shearer cutting dust is guided to move to the leeward coal wall by the induced effect of the downwind spray, preventing the dust from spreading to the working space of personnel inside the support; b. Separation of coal mining space from personnel activity area: Use the high-efficiency dust-blocking and dust-isolating device installed on the hydraulic support to physically separate the coal mining machine working area from the personnel activity area, thereby blocking the dust generated by the coal mining machine from the personnel activity area, preventing the dust generated by the coal mining machine from polluting the personnel activity area; c. Hydraulic support top beam dust extraction and purification: A negative pressure mist dust collector is arranged in front of the support top beam column, and the negative pressure generated by it is used to extract and purify the dust near the support top beam to prevent the dust from spreading from the top beam to the personnel working space. At the same time, the wind of the negative pressure mist dust collector is used to transport the mist to purify the floating dust in the coal mining space; d. Dust collection during hydraulic support column lowering and frame moving: A support dust collection device is arranged on the hydraulic support shielding beam to collect the dust directly generated by column lowering and frame moving, and directly introduce the dust generated by the support column lowering and frame moving into the goaf.

2. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 1, characterized in that: The wireless dust source tracking spray device includes a laser dust sensor, a wireless controller and an intelligent dust suppression device; the laser dust sensor is respectively arranged in front of, above and behind the rocker arm; the intelligent dust suppression device is installed on the chute baffle, and sprays through an integrated solenoid valve and nozzle, and the wireless controller automatically adjusts the spray frequency, intensity and range according to different positions and different dust concentrations.

3. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 2, characterized in that: The wireless dust source tracking spray device always keeps an inclination with the coal mining machine and sprays in the direction of wind flow.

4. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 1, characterized in that: The high-efficiency dust-blocking and dust-isolating device is a roller curtain structure, including a control box, a motor, a reel, a high-efficiency dust-isolating film and a flexible guide rail. The high-efficiency dust-isolating film is made of a transparent non-sticky dust material; the control box is connected to the motor and is arranged on the hydraulic support; the reel is connected to the motor and rotates under the drive of the motor; the high-efficiency dust-isolating film is connected to the flexible guide rails on both sides, and one end of the flexible guide rail is connected to the reel, and the high-efficiency dust-isolating film can be rolled up and unfolded under the rotation of the reel, and the high-efficiency dust-isolating film separates the working area of ​​the coal mining machine from the personnel activity area when it is unfolded; the control box is connected to the electro-hydraulic control system of the hydraulic support and is controlled by it.

5. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 4, characterized in that: The high-efficiency dust-blocking and dust-isolating device also includes a box cover and a nozzle; the reel and the motor are both arranged in the box cover, the box cover is provided with an opening, and the high-efficiency dust-isolating membrane extends from the opening; the nozzle is arranged at the lower end of the box cover, arranged toward the direction of the high-efficiency dust-isolating membrane, and is used for spraying and flushing the high-efficiency dust-isolating membrane.

6. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 1, characterized in that: The negative pressure micro-mist dust collector is arranged in front of the hydraulic support top beam column and toward the coal wall side. It generates negative pressure airflow to suck dust near the support top beam and uses the negative pressure airflow to blow micro-mist to purify the floating dust in the coal mining space.

7. The method for blocking dust in the working space of fully mechanized mining face personnel according to claim 1, characterized in that: The support dust collecting device is tilted downward and arranged between two adjacent hydraulic supports, and is used to collect dust generated during the support column lowering and frame moving process and introduce it into the goaf.

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