A caving coal mechanism with a broken net at the end support of a fully-mechanized caving face and its coal caving method

Abstract

The present invention discloses a mechanism for breaking the net and discharging coal at the end support of a fully-mechanized caving face and a method for discharging coal thereof, which relates to the technical field of end supports in groups of two, and includes a roof beam body, a swing beam and a shield beam. The outer side of the right end of the roof beam body is hinged to the shield beam, and the inner side of the right end of the roof beam body is hinged to the swing beam. The beneficial effects are as follows: when the piston rod of the swing jack extends, the swing beam swings upward, and the telescopic jack pushes the net-breaking beam at the right end of the swing beam to extend. The cutter blocks on the net-breaking beam extend to tear the mesh laid on the roadway roof. Since the swing beam, the shield beam and the side panel form a coal discharge opening, the coal at the top of the roadway falls into the conveyor through the coal discharge opening, ensuring that the top coal better falls into the coal discharge opening and reducing manual coal loading. When the piston rod of the swing jack retracts, the swing beam swings downward, ensuring that when the end support does not discharge coal, the entire mechanism for breaking the net and discharging coal does not bear the pressure of the roadway roof. At the same time, the swing beam also has the function of loosening the top coal during the swinging process, improving the coal discharge efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of end supports in groups of two, and particularly to a mechanism for breaking the net and discharging coal of an end support in a fully-mechanized caving face and a method for discharging coal. Background Art

[0002] The end support in groups of two is a commonly used support equipment in the end area of the underground working face, which can meet the normal advancing requirements of the working face. However, when it is used in the caving face, the coal at the top of the end area often cannot be recovered, which not only causes waste of resources, but also poses a great risk of spontaneous combustion of the coal left in the goaf.

[0003] In order to prevent coal blocks and gangue from falling and injuring people in the roadway of the underground coal mining working face, a top net is generally laid in the roadway. In order to realize the function of coal discharging, it is required to break the top net before coal discharging, and then loosen the coal at the top with external force to make it fall. At present, there are very few application examples of end supports with the function of coal discharging, and the coal discharging effect is not very ideal. Now, most coal mines with the need for coal discharging still rely on manual cutting of the top net, manual loosening of the top coal, and manual coal loading, which is highly dangerous and has low coal discharging efficiency. Therefore, there is an urgent need for an end support coal discharging mechanism with functions such as breaking the top net, loosening the top coal, and falling the coal into the conveyor. Summary of the Invention

[0004] The purpose of the present invention is to provide a mechanism for breaking the net and discharging coal of an end support in a fully-mechanized caving face and a method for discharging coal in order to solve the above problems.

[0005] The present invention realizes the above purpose through the following technical solutions:

[0006] A mechanism for breaking the net and discharging coal of an end support in a fully-mechanized caving face includes a top beam body, a swing beam, and a shield beam. The outer side of the right end of the top beam body is hinged to the shield beam, and the inner side of the right end of the top beam body is hinged to the swing beam. A swing jack is fixedly installed between the lower surface of the top beam body and the lower surface of the swing beam. A net-breaking beam is inserted into the right end of the swing beam, and a telescopic jack is fixedly installed between the lower surface of the swing beam and the lower surface of the net-breaking beam. A cutter block is arranged at the right end of the net-breaking beam, and side guard plates are respectively arranged at the lower parts between the shield beams. The swing beam, the shield beam, and the side guard plates enclose a coal discharging port.

[0007] Preferably: The swing beam is rotationally connected to the top beam body through a pin shaft.

[0008] Preferably: The net-breaking beam is clamped inside the swing beam to extend or retract.

[0009] Preferably: The cutter block is fixed in a fixture at the left end of the net-breaking beam through a fixing pin.

[0010] Preferably, a conveyor is arranged below the top beam body, and the coal on the top of the roadway falls into the conveyor through the coal discharge opening.

[0011] Preferably, the side plate is rotatably connected to the shield beam, and a hydraulic cylinder is connected between the lower surface of the side plate and the lower surface of the shield beam.

[0012] According to the coal discharging method of the coal discharging mechanism of the fully-mechanized caving face end support described above, the following steps are included: pressing the net, breaking the net, loosening the top coal, opening the coal discharge opening to discharge coal, loading coal, and closing the coal discharge opening to end coal discharging.

[0013] Among them, pressing the net can be achieved by the end support supporting the roadway roof;

[0014] Breaking the net can be achieved by the telescopic or shearing movement of the mechanism with knife blocks;

[0015] Loosening the top coal can be achieved by applying a certain force to the roof multiple times;

[0016] Opening and closing the coal discharge opening can be achieved by a telescopic mechanism or a swinging mechanism;

[0017] Loading coal can be achieved by reasonably setting the position of the coal discharge opening so that the fallen coal can fall into the conveyor.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. When the piston rod of the swinging jack extends, the swing beam swings upward, the telescopic jack pushes the net-breaking beam at the right end of the swing beam to extend, and the knife blocks on the net-breaking beam extend to tear the mesh laid on the roadway roof. Since the swing beam, the shield beam and the side plate enclose the coal discharge opening, the coal on the top of the roadway falls into the conveyor through the coal discharge opening, ensuring that the top coal falls better into the coal discharge opening and reducing manual coal loading;

[0020] 2. When the piston rod of the swinging jack retracts, the swing beam swings downward, ensuring that when the end support does not discharge coal, the entire net-breaking coal discharging mechanism does not bear the pressure of the roadway roof. At the same time, the swing beam also has the function of loosening the top coal during the swinging process, improving the coal discharging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1It is the downward view of the installation of the mechanism for breaking net and discharging coal of the end support in the fully-mechanized caving face described in the present invention onto the end support.

[0023] Figure 2 It is the upward view of the installation of the mechanism for breaking net and discharging coal of the end support in the fully-mechanized caving face described in the present invention onto the end support.

[0024] Figure 3 It is the assembly drawing of the mechanism for breaking net and discharging coal of the end support in the fully-mechanized caving face described in the present invention and the top beam.

[0025] Figure 4 It is the detailed assembly drawing of the cutter block of the mechanism for breaking net and discharging coal of the end support in the fully-mechanized caving face described in the present invention.

[0026] Figure 5 It is the front view of the installation of the mechanism for breaking net and discharging coal of the end support in the fully-mechanized caving face described in the present invention onto the end support.

[0027] The description of the reference numerals is as follows:

[0028] 1. Top beam body; 2. Swing beam; 3. Swing jack; 4. Net-breaking beam; 5. Telescopic jack; 6. Cutter block; 7. Shield beam; 8. Side plate; 9. Coal discharge opening; 10. Conveyor. Detailed implementation manners

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] As Figures 1 - 5 shown, a mechanism for breaking the net and discharging coal at the end support of a fully-mechanized caving face includes a top beam body 1, a swing beam 2, and a shield beam 7. The outer side of the right end of the top beam body 1 is hinged to the shield beam 7, and the inner side of the right end of the top beam body 1 is hinged to the swing beam 2. A swing jack 3 is fixedly installed between the lower surfaces of the top beam body 1 and the swing beam 2. The swing jack 3 is used to push the swing beam 2 to swing. A net-breaking beam 4 is inserted into the right end of the swing beam 2. The net-breaking beam 4 is used to break the net. A telescopic jack 5 is fixedly installed between the lower surfaces of the swing beam 2 and the net-breaking beam 4. The telescopic jack 5 is used to push for telescoping. A cutter block 6 is provided at the right end of the net-breaking beam 4. The cutter block 6 is used to break the net. Side support plates 8 are respectively provided at the lower parts between the shield beams 7. The side support plates 8 are used to support and block. The swing beam 2, the shield beam 7, and the side support plates 8 enclose a coal discharge port 9. The coal discharge port 9 is used to discharge coal; the swing beam 2 is rotatably connected to the top beam body 1 through a pin shaft; the net-breaking beam 4 is clamped inside the swing beam 2 for extending or retracting; the cutter block 6 is fixed in a fixture at the left end of the net-breaking beam 4 through a fixing pin; a loader 10 is provided below the top beam body 1. The loader 10 is used to hold. The coal at the top of the roadway falls into the loader 10 through the coal discharge port 9; the side support plates 8 are rotatably connected to the shield beams 7, and the lower surfaces of the side support plates 8 are connected to the lower surfaces of the shield beams 7 through hydraulic cylinders, which is convenient for changing the state for maintenance use.

[0033] According to the coal discharging method of the mechanism for breaking the net and discharging coal at the end support of a fully-mechanized caving face described above, the following steps are included: pressing the net, breaking the net, loosening the top coal, opening the coal discharge port to discharge coal, loading coal, and closing the coal discharge port to end coal discharging.

[0034] Among them, pressing the net can be achieved by the end support supporting the roadway roof;

[0035] Breaking the net can be achieved by the telescopic or shearing movement of the mechanism with a cutter block;

[0036] Loosening the top coal can be achieved by applying a certain force to the roof multiple times;

[0037] Opening and closing the coal discharge port can be achieved by a telescopic mechanism or a swing mechanism;

[0038] Coal loading can be achieved by reasonably setting the position of the coal discharge opening so that the falling coal can fall into the conveyor.

[0039] According to the specific conditions in the coal mine underground, some steps of the above coal discharging method may not be used. If the roadway roof does not need to be covered with a net, only three steps are required for coal discharging, namely, opening the coal discharge opening for coal discharging, coal loading, and closing the coal discharge opening to end the coal discharging.

[0040] Working principle: During use, since the swing beam 2 is rotationally connected to the top beam body 1 through a pin shaft, the swing beam 2 can swing up and down around the pin shaft by the extension or retraction of the piston rod of the swing jack 3; when the piston rod of the swing jack 3 extends, the swing beam 2 swings upward, and the telescopic jack 5 pushes the net-breaking beam 4 at the right end of the swing beam 2 to extend, and the cutter blocks 6 on the net-breaking beam 4 extend to tear the mesh laid on the roadway roof. Since the swing beam 2, the shield beam 7, and the side wall plate 8 enclose the coal discharge opening 9, the coal at the top of the roadway falls into the conveyor 10 through the coal discharge opening 9; when the piston rod of the swing jack 3 retracts, the swing beam 2 swings downward, ensuring that when the end support does not discharge coal, the entire net-breaking coal discharging mechanism does not bear the pressure of the roadway roof. At the same time, the swing beam 2 also has the function of loosening the top coal during the swinging process.

[0041] The top beam body 1, the swing beam 2, the swing jack 3, the net-breaking beam 4, the telescopic jack 5, the shield beam 7, the side wall plate 8, and the conveyor 10 are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods, so no more details will be described here.

[0042] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A method for discharging coal by breaking the mesh at the end support of a fully mechanized caving face, which is realized based on the mechanism for discharging coal by breaking the mesh at the end support of the fully mechanized caving face, is characterized by the following steps: Press the net, break the net, loosen the top coal, open the coal discharge port to discharge coal, load coal, and close the coal discharge port to end coal discharge; the coal discharge mechanism includes a top beam body (1), a swing beam (2) and a shield beam (7). The outer side of the right end of the top beam body (1) is hinged to the shield beam (7), and the inner side of the right end of the top beam body (1) is hinged to the swing beam (2). A swing jack (3) is fixedly installed between the lower surfaces of the top beam body (1) and the swing beam (2). A net-breaking beam (4) is inserted into the right end of the swing beam (2). A telescopic jack (5) is fixedly installed between the lower surfaces of the swing beam (2) and the net-breaking beam (4). A cutter block (6) is arranged at the right end of the net-breaking beam (4). Side plates (8) are respectively arranged at the lower parts between the shield beams (7). The swing beam (2), the shield beam (7) and the side plates (8) enclose a coal discharge port (9); the cutter block (6) is fixed in a fixture at the left end of the net-breaking beam (4) through a fixing pin.

2. The method for breaking the mesh and discharging coal at the end support of a fully-mechanized caving face according to claim 1, characterized in that: The swing beam (2) is rotationally connected to the top beam body (1) through a pin shaft.

3. A method for discharging coal by breaking the net at the end support of a fully-mechanized caving face according to claim 1, characterized in that: The net-breaking beam (4) is stuck inside the swing beam (2) to extend or retract.

4. A method for breaking the net and discharging coal at the end support of a fully-mechanized caving face according to claim 1, characterized in that: A conveyor (10) is arranged below the top beam body (1). The coal at the top of the roadway falls into the conveyor (10) through the coal discharge port (9).

5. A method for discharging coal by breaking the net at the end support of a fully-mechanized caving face according to claim 1, characterized in that: The side plates (8) are rotationally connected to the shield beam (7), and a hydraulic cylinder is connected between the lower surface of the side plates (8) and the lower surface of the shield beam (7).

6. A method for caving coal through broken net at the end support of a fully-mechanized caving face according to claim 1, characterized in that: Pressing the net can be achieved by the end support supporting the roadway roof; breaking the net can be achieved by the telescopic or shearing movement of the mechanism with cutter blocks; loosening the top coal can be achieved by applying a certain force to the roof multiple times; opening and closing the coal discharge port can be achieved by the telescopic mechanism or the swing mechanism; loading coal can be achieved by reasonably setting the position of the coal discharge port so that the falling coal can fall into the conveyor.

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