Coal mine underground top-cutting column circulating supporting device

Abstract

The utility model relates to auxiliary equipment for an underground coal mine, in particular to a cyclic supporting device for cutting top pillars under a mine. Comprising a supporting connecting plate installed on the side face of an end frame of the hydraulic support, one end of the supporting connecting plate is rotationally connected to one end of the side face of the end frame through a limiting pin, an adjusting jack is hinged to the other end of the supporting connecting plate and the side face of the end frame, and a plurality of top cutting columns are installed on the end face of the supporting connecting plate in a penetrating mode. The liquid supply system for adjusting the jack and the top cutting column is connected in series with the liquid supply system of the end head frame through the valve group; by installing the cyclic supporting device for the roof cutting column, the time for personnel to enter a roof cutting line for supporting is shortened, meanwhile, repeated carrying of single columns is avoided, the labor intensity of the personnel is reduced, the time for the personnel to operate in a narrow space and a roof crushing section is shortened, and the safety coefficient and the working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to auxiliary equipment used in underground coal mines, specifically to a circulating support device for cutting roof pillars in underground mines. Background Technology

[0002] During the longwall mining process in a coal mine, the roof in the mined area must collapse in a timely manner to ensure that the pressure on the roof in the working area is within a controllable and safe range. After the necessary individual hydraulic props outside the working area are withdrawn, the roof must collapse along a line as designed. On this line, one side is the supported area and the other side is the roof collapse area. This dividing line is the roof collapse line, also known as the roof cutting line.

[0003] Using technical methods to create a support zone on one side and a collapse zone on the other is called "roof cutting." Roof cutting is mainly achieved using individual hydraulic props, also known as "roof cutting columns." These columns need to be cyclically erected and withdrawn as the working face supports move. Due to the fractured roof in the goaf, the traditional manual erection and withdrawal of individual hydraulic props poses a high safety risk, and the recovered columns require manual carrying and stacking, resulting in extremely low construction efficiency.

[0004] Therefore, a device needs to be designed to replace manual circulation support and retraction of the cutting column, in order to meet the goals of reducing manpower, increasing efficiency, and ensuring safety in downhole operations. Summary of the Invention

[0005] This invention addresses the high safety risks and extremely low construction efficiency associated with the traditional manual erection and retraction of single hydraulic props by providing a circulating support device for cutting roof pillars in coal mines. Applied to the longwall mining process in underground coal mines, it works in conjunction with hydraulic supports to circulate and support cutting roof pillars, offering improved safety, reduced manpower, and increased efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a circulating support device for cutting roof columns in coal mines, including a support connecting plate installed on the side of the end frame of a hydraulic support. One end of the support connecting plate is rotatably connected to one side of the end frame through a limiting pin. The other end of the support connecting plate is hinged to the side of the end frame with an adjusting jack. Multiple cutting roof columns are installed through the end face of the support connecting plate. The hydraulic supply system of the adjusting jack and the cutting roof columns is connected in series with the hydraulic supply system of the end frame through a valve group.

[0007] Furthermore, three top-cutting columns are installed at equal intervals through the end face of the support connecting plate.

[0008] Furthermore, four top-cutting columns are installed at equal intervals on the end face of the support connecting plate.

[0009] Furthermore, one end of the limiting pin is welded to the end frame, and the other end of the limiting pin is rotatably connected to the support connecting plate.

[0010] Furthermore, a set of valves is installed on the side of the end frame to adjust the direction of the top-cutting column circulation support device and the height of the top-cutting column.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By installing a circulating support device for the cutting column, the time required for personnel to enter the cutting line for support is reduced, while repeatedly carrying individual columns is avoided, thus reducing the labor intensity of personnel and improving the safety factor.

[0013] (1) It can reduce the labor intensity of personnel during operation and is more conducive to safe operation;

[0014] (2) It can reduce the time that personnel spend working in confined spaces and roof crushing sections, thus improving safety.

[0015] (3) This device can reduce the labor intensity of employees during operation, improve work efficiency, and is more conducive to safe operation. It can also achieve good economic benefits and can be promoted and applied in the same type of operation in the coal mining industry. Attached Figure Description

[0016] Figure 1 A top view of a circulating support device for cutting the roof pillar in an underground coal mine.

[0017] Figure 2 This is a front view of a circulating support device for cutting the roof support in an underground coal mine.

[0018] The markings in the image are as follows:

[0019] 1-End frame, 2-Support connecting plate, 3-Limit pin, 4-Cut top column, 5-Adjusting jack. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. Example 1

[0021] like Figure 1 and 2As shown, a coal mine underground roof-cutting column circulating support device includes a support connecting plate 2 installed on the side of the hydraulic support end frame 1. One end of the support connecting plate 2 is rotatably connected to one end of the side of the end frame 1 via a limiting pin 3. The other end of the support connecting plate 2 is hinged to the side of the end frame 1 with an adjusting jack 5. Multiple roof-cutting columns 4 are installed through the end face of the support connecting plate 2 to replace the "traditional roof-cutting columns". To meet the on-site roof-cutting requirements, the device can simultaneously control the movement and lifting of 3-4 individual hydraulic supports. The hydraulic supply system of the adjusting jack 5 and the roof-cutting columns 4 is connected in series with the hydraulic supply system of the end frame 1 through a valve group, ensuring safety and reliability. When the support moves forward, the roof-cutting column circulating support device and the roof-cutting columns move as a whole; at the same time, the position of the roof-cutting columns can be adjusted by adjusting the jack on the support device (simultaneously driving the adjustment of the position of the roof-cutting columns).

[0022] Furthermore, three top-cutting columns 4 are installed at equal intervals through the end face of the supporting connecting plate 2.

[0023] Furthermore, four top-cutting columns 4 are installed at equal intervals through the end face of the supporting connecting plate 2.

[0024] Furthermore, one end of the limiting pin 3 is welded to the end frame 1, and the other end of the limiting pin 3 is rotatably connected to the support connecting plate 2.

[0025] Furthermore, a set of valve groups is installed on the side of the end frame 1 to adjust the direction of the top-cutting column circulation support device and the height of the top-cutting column 4. The valve group is connected to the liquid supply system. By operating the valve group, the direction of the top-cutting column circulation support device and the height of the individual hydraulic support (i.e., the top-cutting column 4) can be adjusted, and the top-cutting column can be moved as a whole with the movement of the support.

[0026] Working principle and process: During use, after the end frame 1 is moved forward to the designated position, the liquid supply system valve group is operated to activate the adjusting jack 5, which rotates the supporting connecting plate 2 and the cutting column 4 along the limit pin 3 to... Figure 1 At the location (top-cutting line position), operate the liquid supply system valve group again to raise the top-cutting column 4 to support the roof. After one cycle of mining is completed, the end frame 1 needs to be moved forward. When the end frame 1 is moved forward, first operate the liquid supply system valve group to lower the top-cutting column 4, and operate the adjusting jack 5 to rotate it along the limit pin 3 again, rotating the top-cutting column circulation support device 2 and the top-cutting column 4 to be parallel with the end frame 1. At this time, move the end frame 1 forward again. During the forward movement of the end frame 1, it will drive the entire device to move forward with it to the designated position. By repeating this process, the function of cyclically supporting the top-cutting column is realized. This device has low safety risks, simple overall structure, and is easy to manufacture and promote.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A circulating support device for cutting roof pillars in coal mines, characterized in that, The system includes a support connecting plate (2) installed on the side of the hydraulic support end frame (1). One end of the support connecting plate (2) is rotatably connected to one side of the end frame (1) via a limiting pin (3). The other end of the support connecting plate (2) is hinged to the side of the end frame (1) with an adjusting jack (5). Multiple cutting columns (4) are installed through the end face of the support connecting plate (2). The liquid supply system of the adjusting jack (5) and the cutting columns (4) is connected in series with the liquid supply system of the end frame (1) via a valve group.

2. The circulating support device for cutting roof pillars in coal mines according to claim 1, characterized in that, Three top-cutting columns (4) are installed at equal intervals through the end face of the support connecting plate (2).

3. A circulating support device for cutting roof pillars in coal mines according to claim 1, characterized in that, Four top-cutting columns (4) are installed at equal intervals through the end face of the support connecting plate (2).

4. A circulating support device for cutting roof pillars in coal mines according to claim 1, characterized in that, One end of the limiting pin (3) is welded to the end frame (1), and the other end of the limiting pin (3) is rotatably connected to the support connecting plate (2).

5. A circulating support device for cutting roof pillars in coal mines according to claim 1, characterized in that, A set of valves is installed on the side of the end frame (1) for adjusting the direction of the top cutting column circulation support device and the height of the top cutting column (4).

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