Partitioned ventilation device for driving working face

Abstract

The utility model discloses a zoning ventilation device for a driving working face, which belongs to the technical field of underground driving engineering and comprises a heading machine body, an air inducing system and an air distributing system are arranged on the heading machine body, the air inducing system comprises a roadway air duct, the roadway air duct is connected with a telescopic air duct, and the telescopic air duct is connected with a connecting hose; the air distribution system comprises an air flow tee joint and an air distribution box, one end of the air flow tee joint is connected with the connecting hose, the other end of the air flow tee joint is connected with the air distribution box, and the bottom of the air distribution box is connected with a dust collection system. The technical problems that an existing ventilation device is fixed in ventilation area and poor in ventilation effect are solved.

Description

Technical Field

[0001] This utility model belongs to the field of underground tunneling engineering technology, specifically relating to a zoned ventilation device for a tunneling working face. Background Technology

[0002] Ventilation during tunnel excavation not only needs to remove harmful gases from the working face, but also dust. In particular, dust at the tunneling face is the most concentrated and serious source of pollution in the entire mine. Therefore, solving the ventilation problem will also help solve the dust problem.

[0003] Coal mine safety regulations require that the distance between forced ventilation openings and working faces should not exceed 10m, and for exhaust ventilation openings, not exceed 5m. Currently, ventilation duct extensions are often added as a single construction step within a construction cycle. This makes it difficult to guarantee that the distance between the ventilation openings and the working face meets the aforementioned safety regulations. The progress and location of duct extensions are often constrained by the entire construction process. If other stages of the process are delayed or altered, the duct extension may be affected, preventing timely adjustment of the ventilation openings to the appropriate distance from the working face, which would significantly impact production. For rapid tunneling faces using forced ventilation, a large number of tunneling equipment are deployed, and the work line is long; for example, the length of the face-mounted anchor machine itself exceeds 10m. Therefore, to meet the requirements, the ventilation duct outlet must be placed above the tunneling machine. However, this would interfere with normal anchoring operations, and the concentrated airflow could adversely affect personnel health. If exhaust ventilation is used, and the ventilation openings cannot be moved flexibly with the tunneling progress, it would severely restrict production.

[0004] Furthermore, the current method of extending ventilation ducts according to a cyclical advance sequence requires determining the length of each duct section for construction matching. The existing duct lengths have a certain impact on construction speed in single-line operations. On-site, 10m sections are generally used. In fact, this method of constructing ducts of fixed lengths in a cyclical sequence means that the distance between the duct outlet and the working face exceeds the distance required by coal mine safety regulations when extending the duct. Moreover, the distance between the duct outlet and the working face is constantly changing, resulting in unstable airflow at the working face, which is detrimental to ventilation management.

[0005] Dust control at the working face is closely related to ventilation. Despite extensive research and implementation of methods such as spraying, isolation, foam covering, and negative pressure dust collection, it remains difficult to meet the safety requirements of personnel working in the tunneling area, especially in roadway excavation where dust suppression is a significant production challenge. Spraying, isolation, and foam covering methods have theoretical limitations; achieving a completely dust-free environment is impossible. Negative pressure dust collection is theoretically feasible, but achieving a dust-free environment under existing forced ventilation systems requires extremely powerful suction capabilities and a significant distance between the forced ventilation duct and the working face, often exceeding the limits permitted by coal mine safety regulations. Therefore, improvements in ventilation technology are needed to address these issues.

[0006] Wall-mounted ventilation ducts are a method of regulating airflow to assist in dust control. This airflow diversion helps to enhance the dust collection effect and improve dust removal efficiency. Chinese patent CN112879068A discloses a large vortex dust collection-swirl air distribution zone system and zoned ventilation and dust control method for tunnel face. Although this device forms a swirl air distribution zone by using lateral air outlets in conjunction with the roadway sidewalls, and the large vortex dust collection zone and swirl air distribution zone can move forward with the tunneling machine to provide a large amount of fresh, unpolluted air to the working area except for the facing area, greatly alleviating the gas accumulation problem often found in traditional wall-mounted ventilation duct technology and effectively reducing the risk of gas explosion, the airflow direction of the device's air outlets is fixed, so the formed ventilation zone is also fixed, and it cannot achieve a good ventilation effect. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a zoned ventilation device for tunneling faces, so as to solve the technical problems of fixed ventilation areas and poor ventilation effect of existing ventilation devices.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A zoned ventilation device for a tunneling face includes a tunneling machine body, on which an exhaust system and an air distribution system are provided. The exhaust system includes a roadway ventilation duct, which is connected to a telescopic ventilation duct, and the telescopic ventilation duct is connected to a connecting hose.

[0010] The air distribution system includes an airflow tee and an air distribution box. One end of the airflow tee is connected to the connecting hose, and the other end is connected to the air distribution box. A dust collection system is connected to the bottom of the air distribution box.

[0011] In the above technical solution, the tunnel ventilation duct introduces fresh outside air, while the telescopic ventilation duct draws fresh air from the tunnel ventilation duct and directs it to the tunneling face. The connecting hose is provided because the position of the tunneling machine at the working face constantly changes during operation, and neither the tunneling machine nor the telescopic ventilation duct can move linearly. Therefore, the connecting hose is needed for adjustment. The connecting hose has a certain degree of flexibility to adapt to the dynamic changes in the working face, ensuring that the ventilation system always covers the working face and preventing ventilation interruptions or efficiency reductions due to working face movement.

[0012] The connecting hose moves together with the tunneling machine to ensure that the ventilation system can advance synchronously with the working face and maintain ventilation effectiveness.

[0013] Preferably, the airflow tee is equipped with an airflow regulating motor, and the airflow tee connected to the connecting hose is equipped with a flow regulating damper inside the pipe, and the flow regulating damper is equipped with an end cap on the outside.

[0014] More preferably, the pipe connected to the connecting hose on the airflow tee and the pipe connected to the air distribution box are vertically connected.

[0015] Preferably, a telescopic air duct is connected between the telescopic air duct and the connecting hose.

[0016] Preferably, the air distribution box is provided with a plurality of air distribution box outlets.

[0017] More preferably, a control valve is provided on one side of the air distribution box.

[0018] More preferably, the control valve is electrically connected to the airflow regulating motor, and the airflow regulating motor is equivalent to the power source of the control valve, which facilitates the adjustment of the airflow direction or airflow volume of the airflow regulating damper.

[0019] In the above technical solution, the specific control method of the control valve is as follows: During the design of the ventilation system, the direction and path of the airflow are planned according to the airflow requirements of each working area. The location of the air distribution box and the flow regulating damper are key nodes. When it is necessary to direct the airflow to a specific area, the control valve is opened, causing the flow regulating damper to open, and the airflow will flow to that area along the preset channel. In order to provide fresh air to the mining face, the control valve of the air distribution box and the flow regulating damper leading to the working face will be opened, allowing the airflow to flow from the intake shaft through the roadway ventilation duct, telescopic ventilation duct, air distribution box, and the opened damper to the mining face.

[0020] Preferably, a diversion interface is provided between the tunnel ventilation duct and the telescopic ventilation duct. The diversion interface includes two snap-fit ​​edges, and a sleeve hole is provided between the two snap-fit ​​edges. An air outlet is provided on the sleeve hole, and an air outlet guide plate is provided on the air outlet.

[0021] Preferably, the air outlet guide plate is provided in several parts.

[0022] In the above technical solution, the diversion interface is used to connect the tunnel ventilation duct and the telescopic ventilation duct.

[0023] More preferably, a hanging buckle is provided at the top of the socket to facilitate hanging the diversion interface.

[0024] Preferably, the dust collection system includes a dust collection duct, one end of which is connected to a dust collection fan, and the other end is provided with a negative pressure dust collection port.

[0025] Further preferably, the negative pressure dust suction port is located 1000-3000mm away from the front.

[0026] Preferably, a control valve is provided on the side of the air distribution box away from the airflow tee.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention provides a zoned ventilation device for a tunneling face. By setting up an air intake system and an air distribution system, it realizes zoned ventilation of the tunneling face, ensuring that there is always enough fresh airflow at the working face during the tunneling process. The airflow tee and air distribution box in the induced draft system and the air distribution system realize the diversion and regulation of airflow. Through the roadway ventilation duct in the induced draft system, in conjunction with the telescopic ventilation duct, and the air outlet on one side of the airflow tee and air distribution box, a positive pressure airflow zone is formed in the facing direction of the tunneling machine, and this area is filled with fresh airflow. The air outlet of the dust collection system mixes with a portion of the fresh air diverted from the other side of the air distribution box, forming a mixed airflow zone in the opposite direction of the facing direction of the tunneling machine, and this area is filled with fresh airflow. At the same time, the dust removal effect is effectively improved through the cooperation of the air distributor and the dust removal system. The airflow in the mixed airflow zone encounters resistance during the flow process and gradually accumulates at the end of the opposite direction of the facing direction of the tunneling machine, so as to form a full pressure return flow zone outside the roadway ventilation duct and inside the roadway, ensuring that the airflow can effectively cover the working face and improve ventilation efficiency. In summary, the three-zone ventilation system enables zoned ventilation, improving dust removal efficiency while ensuring reasonable airflow distribution. The air distribution system on the tunneling equipment also ensures a balanced airflow to the tunneling and anchoring work area, preventing the formation of eddies. Furthermore, the air distributor ensures even airflow distribution across all areas of the working face, avoiding localized poor ventilation. During the air distribution process, the airflow can carry dust, which is then discharged through the dust extraction system, improving the working environment. By integrating the tunneling face ventilation system, air distribution system, and tunneling machine technology, and connecting the tunnel ventilation ducts and telescopic ventilation duct outlets to the tunneling machine to form three-zone ventilation, a continuous and reliable supply of fresh air to the work area is ensured, effectively suppressing dust dispersion.

[0029] Furthermore, by installing an airflow regulating motor and a flow-adjusting damper on the airflow tee, the direction and flow rate of the airflow can be flexibly adjusted, ensuring that the airflow can be precisely distributed according to the needs of the working surface. The installation of the regulating damper and airflow adjustment device further enhances the controllability of the airflow and improves the flexibility of the ventilation system.

[0030] Furthermore, the pipes connected to the connecting hose and the air distribution box in the airflow tee are vertically connected. This structural design simplifies the airflow distribution path, reduces airflow resistance, improves ventilation efficiency, and also facilitates a compact layout of the equipment.

[0031] Furthermore, the air distribution box is equipped with multiple air outlets, which can evenly distribute the airflow to different areas of the working surface, ensuring consistent ventilation across all parts of the working surface and avoiding localized poor ventilation.

[0032] Furthermore, the diversion interface design allows for more flexible connection between the tunnel ventilation duct and the telescopic ventilation duct, and the telescopic ventilation duct and connecting hose can be flexibly adjusted in length to adapt to the movement of the tunneling machine. The snap-fit ​​edge and socket design simplify the installation and disassembly process. The air outlet guide plate guides the airflow direction, ensuring that the airflow is evenly distributed to all areas of the working face, avoiding concentrated or uneven airflow.

[0033] Furthermore, the dust collection system effectively removes dust generated at the working face. The coordination of the dust collection duct and the dust collection fan ensures efficient dust collection and treatment, improving air quality at the working face and protecting worker health. The dust collection duct allows dust to be collected centrally, preventing it from spreading to other areas of the working face and significantly improving the working environment. By centrally transporting dust to the dust collection fan through the dust collection duct, the dust generated during tunneling can be handled more efficiently, reducing the harm of dust to worker health and equipment.

[0034] Furthermore, the negative pressure dust extraction port allows the dust extraction fan to be directly aimed at the dust source generated by the tunneling machine, achieving precise dust extraction and preventing dust from spreading to other areas of the working face. By directly absorbing dust near the tunneling machine, the dust concentration at the working face is significantly reduced, improving the working environment for workers and reducing occupational health risks.

[0035] Furthermore, the electrical connection between the airflow regulating motor and the control valve enables automated control of airflow regulation. Operators can remotely adjust the airflow through the control system, improving operational convenience and accuracy. Real-time adjustment of the control valve allows for dynamic adjustment of airflow distribution based on the actual needs of different areas of the work surface, ensuring the flexibility and adaptability of the ventilation system. Automated control avoids airflow waste, precisely adjusts airflow according to actual needs, reduces energy consumption, and improves the energy efficiency of the ventilation system. Attached Figure Description

[0036] Figure 1 This is a structural diagram of the zoned ventilation device for the tunneling face of this utility model;

[0037] Figure 2 This is a structural diagram of the airflow tee of the zoned ventilation device for the tunneling face of this utility model;

[0038] Figure 3 This is a structural diagram of the airflow tee of the zoned ventilation device for the tunneling face of this utility model;

[0039] Figure 4 This is a structural diagram of the ventilation duct connection device of the tunneling face zoned ventilation device of this utility model;

[0040] 1-Dust collection system; 1-1 Negative pressure dust collection port; 1-2 Dust collection duct; 1-3 Dust collection fan; 1-4 Tunneling machine body; 2-Exhaust ventilation system; 2-1 Connecting hose; 2-2 Telescopic duct; 2-4 Roadway ventilation duct; 2-5 Telescopic duct; 3-Air distribution system; 3-1 Airflow tee; 3-1-1 Airflow regulating motor; 3-1-2 Flow regulating damper; 3-1-3 End cover; 3-2 Air distribution box; 3-3 Air distribution box outlet; 3-5 Exhaust ventilation interface; 3-6 Direct airflow outlet; 3-7 Side diversion outlet; 4-1 Monitoring system; 4-2 Control valve; 5-Diversion interface; 5-1 Clip edge; 5-2 Air outlet; 5-3 Air outlet guide plate; 5-4 Socket hole; 5-5 Hanging buckle; 6-Positive pressure airflow zone; 7-Mixed airflow zone; 8-Full pressure return zone. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings:

[0044] Example 1

[0045] like Figures 1 to 4 As shown, a zoned ventilation device for a tunneling face includes a tunneling machine body 1-4. The tunneling machine body 1-4 is equipped with an exhaust system 2 and an air distribution system 3. The exhaust system 2 includes a roadway ventilation duct 2-4, which is connected to a telescopic ventilation duct 2-5. The telescopic ventilation duct 2-5 is connected to a telescopic air pipe 2-2, and the telescopic air pipe 2-2 is connected to a connecting hose 2-1.

[0046] The air distribution system 3 includes an airflow tee 3-1 and an air distribution box 3-2. One end of the airflow tee 3-1 is connected to the connecting hose 2-1, and the other end is connected to the air distribution box 3-2. The bottom of the air distribution box 3-2 is connected to a dust collection system 1.

[0047] The above technical solution enables random follow-up of fresh air, and the airflow of the tunnel ventilation duct 2-4 is diverted in three directions at the diversion interface 5 and the airflow tee 3-1. Specifically, the area between the airflow tee 3-1 and the dust extraction port 1 is a positive pressure airflow zone 6, which fills the face of the tunneling machine with fresh airflow. The area between the diversion interface 5 and the airflow tee 3-1 forms a mixed return flow zone 7, which mixes the air from the dust extraction system 1 with a portion of the fresh air diverted from the air distribution box 3-2 and flows in the opposite direction of the face, filling the face of the tunneling machine 1-4 with fresh airflow. The area outside the diversion interface 5 and inside the tunnel is a full pressure return flow zone 8, which forms a fresh airflow at the end of the face of the tunneling machine in the opposite direction, effectively covering the face and improving ventilation efficiency.

[0048] Preferably, the tunneling machine body 1-4 is equipped with a monitoring system 4-1. The function of the monitoring system is to monitor the airflow in each area, determine whether the airflow meets the coal mine safety regulations and construction specifications based on the airflow size, and technically adjust the airflow to balance the airflow in each zone.

[0049] More preferably, the monitoring system 4-1 employs sensors.

[0050] Preferably, the airflow tee 3-1 is equipped with an airflow regulating motor 3-1-1, and the airflow tee 3-1 connected to the connecting hose 2-1 is equipped with a flow regulating damper 3-1-2 inside the pipe, and an end cap 3-1-3 is provided on the outside of the flow regulating damper 3-1-2.

[0051] Preferably, the pipe connected to the connecting hose 2-1 and the pipe connected to the air distribution box 3-2 are vertically connected.

[0052] In the above technical solution, the airflow tee 3-1 is respectively equipped with an air intake interface 3-5, a direct air outlet 3-6, and a side diversion port 3-7; the airflow tee 3-1 connected to the connecting hose 2-1 is equipped with an air intake interface 3-5, and the air intake interface 3-5 and the direct air outlet 3-6 are connected in a straight line in a concentric circle; the pipe perpendicular to the pipe where the air intake interface 3-5 is located is equipped with a side diversion port 3-7, and each of the pipes where the side diversion port 3-7 and the direct air outlet 3-6 are located is equipped with a flow regulating damper 3-1-2, and the flow regulating damper 3-1-2 is connected to the airflow regulating motor 3-1-1 on a shaft for adjusting the rotation angle of the damper; the airflow regulating motor 3-1-1 is equipped with a start / stop controller, a steering mechanism push rod or a rotating shaft motor, and the steering mechanism is equipped with a return spring and a damper limit adjuster. The start / stop controller is linked with the dust removal equipment, and the start / stop controller controls the steering mechanism to realize the damper angle adjustment.

[0053] In a further preferred embodiment, the airflow tee 3-1 connects to the fresh airflow, which is then distributed through the air distribution box 3-2. The airflow difference between the two sides of the air distribution box 3-2 is no more than 10%, achieved through the airflow regulating damper 3-4. When the dust extraction fan 1-3 of the tunneling machine body 1-4 is on, the airflow regulating damper 3-1-2 is open; when the dust extraction fan 1-3 of the tunneling machine body 1-4 is off, the airflow regulating damper 3-1-2 is at its maximum airflow. The information used to trigger the action of the end cover 3-1-3 is calculated by the wind speed sensor located behind the airflow regulating damper 3-1-2 after monitoring the switch of the dust extraction fan 1-3, enabling the airflow tee 3-1 and the air distribution box 3-2 to distribute airflow to ensure balance or reverse direction.

[0054] Preferably, the direct air inlet 3-6 is located 5-10m away from the working face of the tunneling machine body 1-4.

[0055] Preferably, the air distribution box 3-2 is provided with a plurality of air distribution box outlets 3-3.

[0056] In a further preferred embodiment, a regulating valve 4-2 is provided on the side of the air distribution box 3-2 away from the airflow tee 3-1.

[0057] More preferably, the control valve 4-2 is electrically connected to the airflow regulating motor 3-1-1, and the airflow regulating motor 3-1-1 is equivalent to the power source of the control valve 4-2, which facilitates the adjustment of the airflow direction or airflow volume of the airflow regulating damper 3-1-2.

[0058] Preferably, a diversion interface 5 is provided between the tunnel ventilation duct 2-4 and the telescopic ventilation duct 2-5. The diversion interface 5 includes two snap-fit ​​edges 5-1, and a sleeve hole 5-4 is provided between the two snap-fit ​​edges 5-1. An air outlet 5-2 is provided on the sleeve hole 5-4, and a plurality of air outlet guide plates 5-3 are provided on the air outlet 5-2.

[0059] More preferably, the top of the socket 5-4 is provided with a hanging buckle 5-5 to facilitate hanging the diversion interface 5.

[0060] Preferably, the dust collection system 1 includes a dust collection duct 1-2, one end of which is connected to a dust collection fan 1-3, and the other end is provided with a negative pressure dust collection port 1-1.

[0061] Further preferably, the negative pressure dust suction port 1-1 is located 1000-3000mm away from the working face of the tunneling machine body 1-4 in the facing direction.

[0062] The suction volume of negative pressure dust extraction port 1-1 shall be set to meet the following conditions:

[0063] This usually indicates the required air volume for the longwall face, measured in cubic meters per minute. The "longwall face" here refers to the area in a coal mine where coal mining operations take place. This air volume is to ensure that the longwall face has sufficient fresh air to dilute and remove harmful gases such as methane.

[0064] This refers to the absolute gas emission rate at the longwall face, measured in cubic meters per minute. It reflects the actual amount of gas emitted from the longwall face per unit time.

[0065] : Gas emission imbalance coefficient at the longwall face. Since gas emission may fluctuate at different times, this coefficient is used to account for this imbalance. It is a dimensionless coefficient and is generally obtained through actual observation and statistical analysis.

[0066] q : Represents the absolute emission of carbon dioxide from the longwall face, measured in cubic meters per minute, which is the actual amount of carbon dioxide emitted from the longwall face per unit time.

[0067] k : Carbon dioxide emission imbalance coefficient at the longwall face. Similar to the gas emission imbalance coefficient, it is used to consider the unevenness of carbon dioxide emission over time and is a dimensionless coefficient.

[0068] This refers to the maximum number of people working simultaneously at the longwall face. "4" is an empirical coefficient, indicating that each person needs 4 cubic meters of fresh air per minute.

[0069] This indicates the total air volume required when using explosion-proof diesel-powered locomotives in underground coal mines, measured in cubic meters per minute. It ensures that there is sufficient fresh air in the locomotive operating area to dilute the harmful gases emitted by the locomotive.

[0070] This usually refers to the maximum required air volume at other locations in the area besides explosion-proof diesel-powered locomotives, and is expressed in cubic meters per minute.

[0071] This refers to the number of coal mine explosion-proof diesel-powered locomotives operating simultaneously.

[0072] The power of each explosion-proof diesel locomotive used in coal mines is generally expressed in kilowatts (kW). "4" is a coefficient related to the locomotive's power, used to calculate the required air volume per kilowatt of power.

[0073] (1) Calculated based on gas emission rate

[0074]

[0075] (2) Calculated based on carbon dioxide emission:

[0076]

[0077] (3) Calculated based on the number of staff:

[0078]

[0079] (4) Calculated based on the locomotive power of the explosion-proof diesel power unit for coal mines:

[0080]

[0081] Verification was performed based on the wind speed at the working face:

[0082] The ventilation cross-sectional area is calculated by subtracting the area occupied by the equipment from the area of ​​the tunnel, and then calculated based on a wind speed of 0.25 m / s.

[0083] Calculate the sum of items (1), (2), and (3) according to the above four items, and compare it with item 4 to take the maximum value.

[0084] Verify minimum air volume:

[0085]

[0086] Verify maximum air volume:

[0087]

[0088] The airflow of the split interface 5 is calculated according to the following formula:

[0089]

[0090] In the formula: Q7 - the air volume of the split interface 5, in meters. 3 / min

[0091] Qf - Total air volume of the ventilation duct in the tunnel, in meters 3 / min

[0092] Q1 - Airflow rate at the suction port, in meters (m) 3 / min.

[0093] The method for implementing zoned ventilation using the aforementioned zoned ventilation device at the tunneling face includes the following steps:

[0094] A roadway ventilation duct 2-4 is installed on the tunneling machine body 1-4. The roadway ventilation duct 2-4 is connected to a telescopic ventilation duct 2-5, which is connected to a connecting hose 2-1. The connecting hose 2-1 is connected to an airflow tee 3-1, which is connected to an air distribution box 3-2. A dust collection system 1 is connected to the airflow tee 3-1. The airflow from the airflow tee 3-1 and the air distribution box 3-2 ensures that the airflow from the tunneling machine body 1-4 faces the working face. The positive pressure airflow zone 6 is formed. The air outlet of the dust extraction system 1 mixes with a portion of the fresh air diverted from the air distribution box 3-2 and flows in the opposite direction to the working face of the tunneling machine body 1-4, forming a mixed airflow zone 7. The airflow in the mixed airflow zone 7 is resisted during the flow and gradually accumulates at the end of the working face of the tunneling machine body 1-4 in the opposite direction, forming a full pressure return flow zone 8. The positive pressure airflow zone 6, the mixed airflow zone 7 and the full pressure return flow zone 8 move together with the tunneling machine body 1-4.

[0095] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A device for zoned ventilation of a working face, characterized in that, Including heading machine body (1-4), air guide system (2) and air distribution system (3) are arranged on the heading machine body (1-4), the air guide system (2) includes roadway air cylinder (2-4), the roadway air cylinder (2-4) is connected with telescopic air cylinder (2-5), the telescopic air cylinder (2-5) is connected with connecting hose (2-1); The air distribution system (3) includes air flow tee (3-1) and air distribution box (3-2), one end of the air flow tee (3-1) is connected with the connecting hose (2-1), the other end is connected with the air distribution box (3-2), the air distribution box (3-2) is connected with dust suction system (1) at the bottom.

2. A device for zoned ventilation of a mining face according to claim 1, characterised in that, Air flow regulating motor (3-1-1) is arranged on the air flow tee (3-1), flow regulating damper (3-1-2) is arranged in the pipeline of the air flow tee (3-1) connected with the connecting hose (2-1), end cover (3-1-3) is arranged outside the flow regulating damper (3-1-2).

3. A device for zoned ventilation of a mining face according to claim 1, characterised in that, Telescopic air pipe (2-2) is connected between the telescopic air cylinder (2-5) and the connecting hose (2-1).

4. The device according to claim 1, characterized in that, The air distribution box (3-2) is provided with a plurality of air distribution box air outlets (3-3).

5. The device according to claim 1, characterized in that, The roadway air cylinder (2-4) and the telescopic air cylinder (2-5) are provided with a flow distribution interface (5), the flow distribution interface (5) includes two clamping edges (5-1), a sleeve hole (5-4) is arranged between the two clamping edges (5-1), an air outlet (5-2) is formed in the sleeve hole (5-4), an air outlet guide plate (5-3) is arranged on the air outlet (5-2).

6. A face division ventilation device according to claim 5, characterised in that, The air outlet guide plate (5-3) is provided with a plurality of.

7. A device for zoned ventilation of a mining face according to claim 5, characterised in that, The sleeve hole (5-4) is provided with a hanging buckle (5-5) at the top.

8. The device according to claim 1, characterized in that, The dust suction system (1) includes dust suction air duct (1-2), one end of the dust suction air duct (1-2) is connected with dust suction fan (1-3).

9. A face division ventilation device according to claim 8, characterised in that, The dust suction fan (1-3) is provided with a negative pressure dust suction port (1-1) on the side facing the heading machine body (1-4).

10. The device according to claim 1, characterized in that, The air distribution box (3-2) is provided with a regulating valve (4-2) on the side away from the air flow tee (3-1).

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