Ventilation and dust removal system for open-air slope mining

Abstract

The invention belongs to the technical field of mine ventilation. In order to solve the problem that an existing ventilation and dust removal system for open-air slope mining cannot enter a mining chamber for efficient dust removal and ventilation, the invention provides the ventilation and dust removal system for open-air slope mining, which is arranged on a slope platform, is connected with a transportation unit and comprises a dust removal mechanism and a ventilation mechanism, the dust removal mechanism comprises a flexible air suction air duct, a rigid air suction air duct and a dust remover which are sequentially connected, the flexible air suction air duct is driven by a telescopic piece to stretch or retract so that the air inlet can stretch into the cave opening or retract, and the ventilation mechanism comprises a flexible air outlet air duct, a rigid air outlet air duct and an air supply fan which are sequentially connected; the flexible air outlet air duct moves towards the tunneling direction along with the transportation unit and can be driven by the sliding piece to move in the direction away from the tunneling direction, the system is compact in structure and easy to install, and the ventilation effect and the dust removal efficiency in the whole mining chamber are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of mine ventilation, and in particular relates to a ventilation and dust removal system for open-pit sidewall mining. Background Art

[0002] An open-pit coal mine refers to a type of mine that mines coal by directly stripping off the topsoil when the coal is deposited on the surface or in shallow layers. In some areas with soft geology, landslides are prone to occur in the mountains, so a gentle slope mining method is generally adopted. This method generally produces a large amount of side coal pressure, resulting in serious vacancy and waste of coal resources.

[0003] As the main method to solve the problem of sidewall coal compression, sidewall mining is widely used in open-pit coal mines. The working principle is similar to that of underground single excavation. The continuous mining machine is used to gradually excavate from the gentle slope of the sidewall to extract the sidewall coal compression. Gas and dust will be generated during the mining process. In order to ensure the safety and quality of the project, all harmful substances must be disposed of in time, so the ventilation and dust removal system of open-pit sidewall mining equipment is indispensable. However, the existing ventilation and dust removal systems for open-pit sidewall mining are all in the theoretical stage, and the specifications of actual mining technology are not taken into account, that is, ventilation equipment other than mining equipment is not allowed to enter the cave. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an open-pit sidewall mining ventilation and dust removal system which is easy to install and can efficiently discharge harmful substances.

[0005] The present invention provides a ventilation and dust removal system for open-pit sidewall mining, which is arranged on a sidewall platform and connected to a transport unit, and comprises:

[0006] A dust removal mechanism, the dust removal mechanism comprising a flexible suction cylinder, a telescopic member, a rigid suction cylinder and a dust collector, the dust collector being arranged on the side platform, the air inlet of the dust collector passing through the side platform and being communicated with the rigid suction cylinder, the rigid suction cylinder being communicated with the flexible suction cylinder, the flexible suction cylinder being connected with the telescopic member, and being able to extend or retract along the extension direction of the telescopic member under the drive of the telescopic member, so as to extend the air inlet of the flexible suction cylinder into the cave entrance or retract it;

[0007] The ventilation mechanism comprises a flexible air outlet duct, a sliding member, a rigid air outlet duct and an air supply fan, wherein the air supply fan is arranged on the side platform, the air inlet of the air supply fan is connected with the air outlet of the dust collector, the air outlet of the air supply fan passes through the side platform and is connected with the rigid air outlet duct, the rigid air outlet duct is connected with the flexible air outlet duct, a rigid air duct is arranged on the transport unit, the air outlet of the flexible air outlet duct is connected with the rigid air duct, the transport unit drives the flexible air outlet duct to move in the excavation direction, the flexible air outlet duct is connected with the sliding member, and can move in a direction away from the excavation direction under the drive of the sliding member.

[0008] Optionally, an air outlet device is obliquely arranged at the air outlet of the rigid air duct close to the continuous miner.

[0009] Optionally, an adjustment member capable of adjusting the air outlet angle is provided at the air outlet of the air outlet device.

[0010] Optionally, a frequency converter is provided on the side platform, and an output end of the frequency converter is connected to the air supply fan.

[0011] Optionally, a wind speed sensor is provided at the air outlet position of the air outlet device and at the tail end of every three transport units, and the wind speed sensor is connected to the frequency converter.

[0012] Optionally, a flexible connecting air cylinder is provided between two adjacent rigid air cylinders.

[0013] Optionally, the telescopic member includes a four-stage telescopic structure, and the length of each stage of the telescopic structure is 1.5 m.

[0014] Optionally, a shielding member is also included, which is arranged at one end of the side platform in contact with the coal roadway and can cover the excavation opening of the coal roadway.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0016] A ventilation and dust removal system for open-pit sidewall mining provided by an embodiment of the present invention adopts a combination of rigid ducts and flexible ducts in both the dust removal mechanism and the ventilation mechanism, that is, the dust removal mechanism adopts a flexible suction duct, a rigid suction duct and a dust collector connected in sequence, and the flexible suction duct can be extended into the mine opening or retracted under the drive of a telescopic member, so that the polluted air flow in the mine can enter the dust collector through the flexible suction duct and the rigid suction duct for dust removal, and the ventilation mechanism adopts a flexible air outlet duct, a rigid air outlet duct and an air supply fan connected in sequence, and the flexible air outlet duct is extended as the transport unit moves to ensure that fresh air can be delivered to the head through the air supply fan, and the air flow after dust removal can be delivered to the head, thereby ensuring the ventilation effect in the entire mine, and the entire system has a compact structure, is easy to install, and is convenient for on-site implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic structural diagram of a ventilation and dust removal system for open-pit sidewall mining according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the flexible air suction cylinder being retracted in the dust removal mechanism according to the embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a shielding member according to an embodiment of the present invention.

[0022] Among them, 1. continuous mining machine; 2. air outlet device; 3. rigid air duct; 4. transport unit; 5. flexible connecting air duct; 6. flexible air suction air duct; 7. telescopic part; 8. rigid air suction air duct; 9. dust collector; 10. flexible air outlet air duct; 11. sliding part; 12. air supply fan; 13. rigid air outlet air duct; 14. frequency converter; 15. wind speed sensor; 16. shielding part; 17. side platform. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figures 1 to 3 As shown, this embodiment provides an open-pit sidewall mining ventilation and dust removal system, which is arranged on the sidewall platform 17 and connected to the transport unit 4, and includes a dust removal mechanism and a ventilation mechanism.

[0026] Among them, the dust removal mechanism includes a flexible suction cylinder 6, a telescopic part 7, a rigid suction cylinder 8 and a dust collector 9. The dust collector 9 is arranged on the side platform 17. The air inlet of the dust collector 9 passes through the side platform 17 and is connected with the rigid suction cylinder 8. The rigid suction cylinder 8 is connected with the flexible suction cylinder 6. The flexible suction cylinder 6 is connected with the telescopic part 7 and can be extended or retracted along the extension direction of the telescopic part 7 under the drive of the telescopic part 7, so as to extend the air inlet of the flexible suction cylinder 6 into the cave entrance or retract it. Specifically, a honeycomb baffle is provided on one side of the side platform 17, and the air outlet of the dust collector 9 is arranged at the position of the honeycomb baffle. The air inlet of the dust collector 9 extends downward through the side platform 17. Compared with the existing method of vertically arranging the dust collector 9 on the outside, the structure is compact and the impact on the interior of the standing platform is reduced. The air inlet of the dust collector 9 is connected with the rigid suction duct 8, and the rigid suction duct 8 is connected with the flexible suction duct 6. The telescopic member 7 is arranged on the side of the side platform 17 close to the coal lane and is connected with the flexible suction duct 6 to drive the flexible suction duct 6 to move toward or away from the tunnel entrance. When the telescopic member 7 drives the flexible suction duct 6 to move to the tunnel entrance, the dust collector 9 is started to realize dust removal in the mining tunnel. The polluted air in the mining tunnel flows through the flexible suction duct 6 and the rigid suction duct 8 into the dust collector 9 for dust removal, and the airflow after dust removal flows into the ventilation mechanism.

[0027] The ventilation mechanism includes a flexible air outlet duct 10, a sliding member 11, a rigid air outlet duct 13 and an air supply fan 12. The air supply fan 12 is arranged on the side platform 17. The air inlet of the air supply fan 12 is connected with the air outlet of the dust collector 9. The air outlet of the air supply fan 12 passes through the side platform 17 and is connected with the rigid air outlet duct 13. The rigid air outlet duct 13 is connected with the flexible air outlet duct 10. A rigid air duct 3 is arranged on the transport unit 4. The air outlet of the flexible air outlet duct 10 is connected with the rigid air duct 3. The transport unit 4 drives the flexible air outlet duct 10 to move in the excavation direction. The flexible air outlet duct 10 is connected with the sliding member 11 and can move in a direction away from the excavation direction under the drive of the sliding member 11. Specifically, the air inlet of the air supply fan 12 is arranged at the position of the honeycomb baffle, and its air inlet is connected with the air outlet of the dust collector 9, and its air outlet extends downward through the side platform 17, thereby connecting with the rigid air outlet duct 13, and the rigid air outlet duct 13 ensures that the air outlet of the air supply fan 12 is located below the side platform 17, and the rigid air outlet duct 13 is connected with the flexible air outlet duct 10, and the flexible air outlet duct 10 is connected with the rigid duct 3 on the transport unit 4. When the continuous mining machine 1 drives the long-distance transport unit 4 forward, the flexible air outlet duct 10 moves with the transport unit 4 and stretches to ensure that fresh air can be delivered to the head through the air supply fan 12, and the dust-removed wind flow can be delivered to the head to ensure the ventilation effect of the head. The sliding member 11 is arranged at the bottom of the side platform 17. When the transport unit 4 moves to the Figure 2 When the flexible air outlet duct 10 is in the position shown in FIG. 1 , the flexible air outlet duct 10 is disconnected from the rigid air duct 3 , and the sliding member 11 drives the flexible air outlet duct 10 to retract, thereby completing the excavation ventilation work.

[0028] The present embodiment provides a ventilation and dust removal system for open-pit sidewall mining, which adopts a combination of rigid and flexible ducts in both the dust removal mechanism and the ventilation mechanism, that is, the dust removal mechanism adopts a flexible suction duct 6, a rigid suction duct 8 and a dust collector 9 which are connected in sequence, and the flexible suction duct 6 can be extended into the mine opening or retracted under the drive of the telescopic member 7, so that the polluted air flow in the mine can enter the dust collector 9 through the flexible suction duct 6 and the rigid suction duct 8 for dust removal, and the ventilation mechanism adopts a flexible air outlet duct 10, a rigid air outlet duct 13 and an air supply fan 12 which are connected in sequence, and the flexible air outlet duct 10 is extended as the transport unit 4 moves, so as to ensure that fresh air can be delivered to the head through the air supply fan 12, and the air flow after dust removal can be delivered to the head, so as to ensure the ventilation effect in the entire mine, and the whole system has a compact structure, is easy to install, and is convenient for on-site implementation.

[0029] Further, see Figure 1As shown, an air outlet device 2 is arranged obliquely at the air outlet of the rigid air duct 3 near the continuous mining machine 1, and an adjusting member capable of adjusting the air outlet angle is arranged at the air outlet of the air outlet device 2. Specifically, the air outlet device 2 is arranged obliquely, so as to raise the air outlet of the rigid air duct 3, thereby facilitating ventilation. By arranging the adjusting member at the air outlet of the air outlet device 2, it is convenient to adjust the wind direction, so as to fully ventilate the mining tunnel, thereby improving the ventilation efficiency.

[0030] Continue to refer to Figure 1 As shown, a frequency converter 14 is provided on the side platform 17, and the output end of the frequency converter 14 is connected to the air supply fan 12. Specifically, as the excavation depth of the continuous miner 1 changes, the transport unit 4 needs to be overlapped repeatedly, so that the flexible air outlet duct 10 is continuously extended or stretched, and the air volume of the air supply fan 12 is controlled by setting the frequency converter 14 to adapt to the normal operation of the flexible air outlet duct 10.

[0031] Furthermore, wind speed sensors 15 are provided at the air outlet of the air outlet device 2 and at the tail end of every three transport units 4, and the wind speed sensors 15 are connected to the frequency converter 14. Specifically, by providing the wind speed sensor 15 at the air outlet of the air outlet device 2, the wind speed at the air outlet of the air outlet device 2 is monitored, and the frequency converter 14 receives the wind speed signal to control the air volume of the air supply fan 12, thereby ensuring the head-on ventilation effect. By providing the wind speed sensor 15 at the tail end of every three transport units 4, the wind speed here can be monitored in real time, which is convenient for later troubleshooting of whether the rigid air duct 3 has air leakage, connection section disconnection and other faults.

[0032] In order not to affect the excavation work of the continuous mining machine 1, a flexible connecting wind duct 5 is arranged between two adjacent rigid wind ducts 3. The flexible connecting wind duct 5 can adapt to the connection turning points and deformation points of the rigid wind duct 3 to achieve a smooth transition. The flexible connecting wind duct 5 has a certain degree of elasticity, which is convenient for adjusting the length and angle of the overall wind duct, thereby extending the air supply distance and being able to adapt to different ventilation requirements to ensure the ventilation effect of the excavation face.

[0033] Reference Figure 1 and Figure 2 As shown, the telescopic member 7 includes a four-stage telescopic structure, and the length of each stage of the telescopic structure is 1.5m, that is, the length of the telescopic member 7 is 6m when it is fully extended. When the telescopic member 7 is fully extended, it can drive the flexible suction air cylinder 6 to extend 1.5m into the tunnel entrance, thereby ensuring the dust removal effect of the tunnel entrance and preventing the dust in the tunnel from spreading into the atmosphere.

[0034] Reference Figure 3As shown, it also includes a shielding member 16, which is arranged at one end of the side platform 17 that contacts the coal roadway and can cover the excavation opening of the coal roadway. The shielding member 16 is used to prevent harmful substances such as coal dust and gas in the coal mine from diffusing outside the mining tunnel, and at the same time increases the dust content in the polluted air flow sucked into the dust collector 9, thereby improving the dust removal efficiency.

[0035] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A ventilation and dust removal system for open-pit sidewall mining, arranged on a sidewall platform (17) and connected to a transport unit (4), characterized in that: include: A dust removal mechanism, the dust removal mechanism comprising a flexible suction cylinder (6), a telescopic member (7), a rigid suction cylinder (8) and a dust collector (9), the dust collector (9) being arranged on the side platform (17), the air inlet of the dust collector (9) passing through the side platform (17) and being communicated with the rigid suction cylinder (8), the rigid suction cylinder (8) being communicated with the flexible suction cylinder (6), the flexible suction cylinder (6) being connected with the telescopic member (7), and being able to extend or retract along the extension direction of the telescopic member (7) under the drive of the telescopic member (7), so as to extend the air inlet of the flexible suction cylinder (6) into the cave entrance or to retract it; A ventilation mechanism, the ventilation mechanism comprising a flexible air outlet duct (10), a sliding member (11), a rigid air outlet duct (13) and an air supply fan (12), the air supply fan (12) being arranged on the side platform (17), the air inlet of the air supply fan (12) being connected to the air outlet of the dust collector (9), the air outlet of the air supply fan (12) passing through the side platform (17) and being connected to the rigid air outlet duct (13), the rigid air outlet duct The cylinder (13) is connected to the flexible air outlet duct (10), the transport unit (4) is provided with a rigid air duct (3), the air outlet of the flexible air outlet duct (10) is connected to the rigid air duct (3), the transport unit (4) drives the flexible air outlet duct (10) to move along the excavation direction, the flexible air outlet duct (10) is connected to the sliding member (11), and can move in a direction away from the excavation direction under the drive of the sliding member (11).

2. The open-pit sidewall mining ventilation and dust removal system according to claim 1 is characterized in that: An air outlet device (2) is obliquely arranged at the air outlet of the rigid air cylinder (3) close to the continuous mining machine (1).

3. The ventilation and dust removal system for open-pit sidewall mining according to claim 2 is characterized in that: An adjusting member capable of adjusting the air outlet angle is provided at the air outlet of the air outlet device (2).

4. The open-pit sidewall mining ventilation and dust removal system according to claim 2 is characterized in that: A frequency converter (14) is provided on the side platform (17), and an output end of the frequency converter (14) is connected to the air supply fan (12).

5. The ventilation and dust removal system for open-pit sidewall mining according to claim 4 is characterized in that: A wind speed sensor (15) is provided at the air outlet position of the air outlet device (2) and at the tail end of each of the three transport units (4), and the wind speed sensor (15) is connected to the frequency converter (14).

6. The ventilation and dust removal system for open-pit sidewall mining according to claim 1 is characterized in that: A flexible connecting air cylinder (5) is provided between two adjacent rigid air cylinders (3).

7. The ventilation and dust removal system for open-pit sidewall mining according to claim 1 is characterized in that: The telescopic member (7) comprises a four-stage telescopic structure, and the length of each stage of the telescopic structure is 1.5 m.

8. The ventilation and dust removal system for open-pit sidewall mining according to claim 1 is characterized in that: It also includes a shielding member (16), which is arranged at one end of the side platform (17) in contact with the coal roadway and can cover the excavation opening of the coal roadway.

Images