WO2018094657A1

WO2018094657A1 - Hydraulic support for soil-like coal working face, and protection method for coal seam mining

Info

Publication number: WO2018094657A1
Application number: PCT/CN2016/107132
Authority: WO
Inventors: 王磊; 谢广祥; 朱传奇
Original assignee: 安徽理工大学
Priority date: 2016-11-24
Filing date: 2016-11-24
Publication date: 2018-05-31

Abstract

A hydraulic support for soil-like coal working face, and a protection method for coal seam mining. The hydraulic support comprises a support base (7), a support top beam (5), a support vertical pillar (6), an advancing jack (8), a side protection plate (3) and a side protection plate jack (4), and also comprises a forepoling top beam (1) and a forepoling top beam jack (2). The forepoling top beam (1) is located in front of the support top beam (5), is controlled by the forepoling top beam jack (2) to stretch, and is inserted into a coal wall during a supporting operation. For soil-like coal, an effective working space is provided to the side protection plate (3) by using the forepoling top beam (1), complete opening of the side protection plate of the hydraulic support is facilitated, and the protection plate effect of the hydraulic support is sufficiently achieved, thereby improving the stability of a coal wall.

Description

Hydraulic support for coal-like coal working face and protection method for coal seam mining

Technical field

The invention relates to the technical field of coal mining, in particular to a hydraulic support for a coal-like coal working face and a coal seam mining protection method.

Background technique

The soft coal seam has low strength and poor structure. Under the long-term specific geological and mechanical conditions, it forms a physical and mechanical characteristic similar to that of loess. This broken and loose soil-like non-soil coal body is a kind of soil-like coal.

In the process of excavation of coal-like coal face, the coal wall is easy to lose, and the stability of the coal wall seriously restricts the safe and efficient mining of the soil-like coal seam. When the coal seam is recovered, the hydraulic support plays a key supporting role. Choosing a suitable hydraulic support is the premise of preventing and controlling the coal wall piece and improving the stability of the coal body.

Although the existing hydraulic support for the soft coal seam working face has increased the guarding plate, after the coal mining machine cuts the coal, the newly exposed top is easy to fall, and the falling coal rock mass is accumulated in front of the coal wall, reducing The space in front of the hydraulic support makes it difficult to fully open the protective panel. The protective performance of the bracket is not fully exerted, and the supporting effect is not obvious, and the stability of the coal body cannot be maximized.

Summary of the invention

The object of the present invention is to provide a hydraulic support for a coal-like coal working face to improve the stability of the coal wall during the mining process.

The object of the present invention is also to provide a coal seam mining protection method for earth-like coal to improve the stability of the coal wall during coal wall mining.

To this end, the present invention provides a type of soil coal working face hydraulic support, including a bracket base, a bracket top beam, a bracket column, a jacking jack, a guard panel, and a guard panel jack, and also includes a front probe beam and a front probe roof. The beam jack, wherein the front probe beam is located in front of the top beam of the bracket, is controlled by the front probe jack, and is inserted into the coal wall during the support operation.

Further, the front probe beam is a shovel type.

Further, one end of the front probe beam jack is fixedly connected with the bracket top beam, and the other end is fixedly connected with the front probe beam.

Further, one end of the top panel jack is connected to the bracket top beam, and the other end is connected to the guard panel.

Further, the connecting end of the top panel is hinged to the bracket top beam.

Further, the widths of the front probe beam and the front probe beam jack are smaller than the width of the bracket top beam.

Further, the guard panel includes a guard panel parallel to the work surface during operation and a connecting rod located on the left and right sides of the soldering jack beam, wherein the connecting rod includes a connecting end hinged to the bracket top beam.

Further, a position of the guard panel adjacent to the bottom surface of the front probe beam is provided with a relief surface, wherein the relief surface forms a relief space between the guard panel and the coal wall.

Further, the bottom surface of the front probe beam is a sloped surface, and the angle with the horizontal plane is 5° to 10°.

According to another aspect of the present invention, there is provided a method for protecting coal seams of a type of earth coal, using a hydraulic support of a soil-like coal face according to the above, the method comprising the steps of: mining a coal wall in a shearer drum When the hydraulic support is located, the front probe beam and the guard plate of the hydraulic support are recovered for coal cutting; after the coal cutting is completed, the support column of the hydraulic support is recovered, and the scraper conveyor and the shifting jack are used for traction. The hydraulic support is integrally advanced, and then the support column is raised to support the support top beam; the front probe beam is opened to force the front probe beam to be inserted into the coal wall, and the guard panel jack is opened to open the guard plate; Use the shift jack to push the scraper conveyor and the shearer forward and wait for the next mining.

Compared with the prior art, the beneficial effects of the present invention are embodied in: the front probe beam is designed on the front section of the top beam of the bracket and the top of the guard panel. After the coal cutter is used for cutting coal, the front probe beam is in front of the front roof beam. Under the push of the jack, the newly exposed roof can be extended in time to prevent the roof from falling off, ensuring the space between the hydraulic support and the coal wall, improving the effective working space for the guard plate, and facilitating the completeness of the hydraulic support plate. Open, fully play the role of the shield of the hydraulic support to improve the stability of the coal wall.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The invention will now be described in further detail with reference to the drawings.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

1 is a schematic structural view of a hydraulic support for a soil-like coal working face according to an embodiment of the present invention;

2 illustrates a top structure of a hydraulic support for a soil-like coal face according to an embodiment of the present invention;

3 is a schematic view showing a state of use of a hydraulic support for a soil-like coal face in a working face according to an embodiment of the present invention;

4 is a structural schematic view showing a guard panel of a hydraulic support for a soil-like coal face according to an embodiment of the present invention;

FIG. 5 is a flow chart showing a coal seam mining protection method for a soil-like coal according to an embodiment of the present invention.

Description of the reference numerals

1. Front probe beam; 2. Front probe beam jack;

3, the guard plate; 4, the guard plate jack;

5. Supporting top beam; 6. Supporting column;

7, the base of the bracket; 8, the jack;

9, scraper conveyor; 10, coal mining machine;

11. Shearer drum; 12, coal wall;

31. The guard plate body; 32. connecting rod;

33, avoidance surface; 1a, top surface;

1b, the bottom surface.

detailed description

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

Figures 1 through 4 illustrate some embodiments in accordance with the present invention.

As shown in Fig. 1 and Fig. 3, the hydraulic support of the earth-like coal working face includes a support base 7, a support top beam 5, a support column 6, a push jack 8, a guard plate 3, and a guard panel jack 4, and also includes a front probe. The top beam 1 and the front roof jack 2, wherein the front roof beam 1 is located in front of the roof beam 5, is controlled by the front roof jack 2, and is used for insertion into the coal wall during the supporting operation.

Wherein, one end of the front probe beam jack 2 is connected with the bracket top beam 5, the other end is connected with the front probe beam 1, and the front probe beam jack 2 is extended to push the front probe beam 1 forward, the guard panel jack One end of 4 is connected with the bracket top beam 5, the other end is connected with the guard panel 3, and the guard panel jack 4 is extended to open the guard panel 3, and the bracket pillar 6 is located between the bracket top beam 5 and the bracket base 7. The bracket column 6 is used to support the bracket top beam 5, and the shifting jack 8 is connected to the bracket base 7.

The invention designs a front probe beam at the front section of the top beam of the bracket and above the guard plate. After the coal cutter cuts the coal, the front probe beam can extend out and support the newly exposed roof panel under the push of the front probe jack. To prevent the roof from falling off, to ensure the space between the hydraulic support and the coal wall, to improve the effective working space for the guard plate, to facilitate the full opening of the hydraulic support guard plate, and to maximize the role of the hydraulic support plate. Improve the stability of the coal wall.

In an embodiment, as shown in FIG. 2, the front probe beam 1 is of a spade type. Preferably, the top surface 1a of the front probe beam 1 is a horizontal plane, and the bottom surface 1b is a sloped surface. In the extending direction of the front probe beam 1, the thickness of the front probe beam 1 is thinned from thickness and pointed at the end. More preferably, the angle of the bottom surface 1b of the front probe beam is between 5° and 10°, for example 6°. In the present embodiment, the shape of the front probe beam is suitable for insertion into the coal seam, and the applied external force is small, and only a small local agglomeration or slag is generated to the coal wall.

In an embodiment, as shown in FIGS. 1 and 4, in the working position of the sill, the top of the sill 3 is a escaping surface 33 that is outwardly inclined with respect to the vertical working surface of the coal wall. Form a evasive space. In this embodiment, the setting of the avoidance surface facilitates the smooth opening of the guard panel. At the same time, the relief surface 33 and the bottom surface (beveled surface) of the front probe beam 1 are functionally matched to avoid a localized portion of the coal wall, thereby achieving a better support effect.

In an embodiment, as shown in FIG. 2, along the extending direction of the front probe beam, the width of the front probe beam 1 is narrowed from the width and the tip end is pointed. In the present embodiment, the insertion resistance of the front probe beam can be further reduced.

In one embodiment, the width of the front probe beam 1 and the front probe beam jack 2 is less than the width of the bracket top beam. In this embodiment, in the width range of the bracket top beam, connecting rods may be disposed on both sides of the front probe beam jack for connecting the guard panels.

In an embodiment, as shown in FIG. 4, the fender 3 includes a fender body 31 parallel to the work surface during operation and a connecting rod 32 on the left and right sides of the front probe jack, wherein the connecting rod 32 The connecting end is hinged to the bracket top beam 5. In the present embodiment, the space on both sides of the front probe jack is effectively and reasonably utilized. In a variant embodiment, the connecting rod 32 is fixedly connected to the bracket top beam 5 and the guard panel 31 is hinged to the connecting rod 32. In the present modified embodiment, the connecting rod 32 is a fixing member. When recovering, the front probe beam is located between the connecting rods on both sides to protect the front probe beam.

As shown in Figure 5, the coal seam mining protection method for the earth-like coal includes the following steps:

S11. When the coal mining machine drum mining coal wall reaches the position of the hydraulic support, recover the front probe beam and the guard plate of the hydraulic support to cut coal;

S13. After the coal cutting is completed, the support column of the hydraulic support is recovered, and the hydraulic support is integrally advanced by the scraper conveyor and the shifting jack, and then the support column is raised to support the support top beam;

S15. Opening the front probe jack to force the front probe beam to insert into the coal wall, and opening the guard panel jack to open the guard panel;

S17. Use the shift jack to push the scraper conveyor and the shearer forward, waiting for the next mining.

According to the coal seam mining protection method of the present invention, after the coal cutter drum 11 finishes cutting coal, the support column 6 is recovered, and the bracket is integrally advanced by the scraper conveyor 9 and the shift jack 8 , and then the bracket column 6 is raised, and the support bracket top is supported. Beam 5, open the guard panel jack 4, push the front probe beam into the coal wall, and then open the guard panel 3, completely isolate the newly exposed roof to prevent the roof from falling; finally, use the jack 8 to push the scraper conveyor 9 and The coal mining machine 10 moves forward to complete a coal mining support process.

The invention fully utilizes the protection and support function of the hydraulic support to prevent accidents such as “film, take-off and leakage” which are harmful to safety production during the mining process, and achieve the purpose of safe and efficient recovery of the earth-like coal working face.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Hydraulic support for earth-like coal working face, including bracket base (7), bracket top beam (5), support column (6), shift jack (4), guard plate (3), and guard panel jack (4) And characterized in that it further comprises a front probe beam (1) and a front probe beam jack (2), wherein the front probe beam (1) is located in front of the bracket top beam (5), The front probe jack (2) controls the telescoping and is inserted into the coal wall during the support operation.
The hydraulic support for a soil-like coal face according to claim 1, wherein the front probe beam (1) is a shovel type.
The hydraulic support for a soil-like coal face according to claim 1, wherein one end of the front probe jack (2) is fixedly connected with the bracket top beam (5), and the other end and the front probe are The top beam (1) is fixedly connected.
The hydraulic support for a soil-like coal face according to claim 1, wherein one end of the guard panel jack (4) is connected to the bracket top beam (5), and the other end is connected to the guard panel ( 3) Connected.
The soil-like coal face hydraulic support according to claim 1, characterized in that the connecting end of the fender (3) is hinged to the bracket top beam (5).
The hydraulic support for a coal-like coal face according to claim 1, wherein the width of the front probe beam (1) and the front probe beam jack (2) is smaller than the width of the bracket top beam (5). .
The hydraulic support for a coal-like coal face according to claim 6, wherein the guard panel (3) comprises a guard body (31) parallel to the coal wall surface during the supporting operation and is located in front of the Connecting rods (32) on the left and right sides of the top beam jack (2), wherein the connecting rod (32) comprises a connecting end hinged to the bracket top beam (5).
The hydraulic support for a coal-like coal face according to claim 1, wherein a position of the guard panel adjacent to a bottom surface of the front probe beam is provided with a relief surface, wherein the relief surface is in the protection A relief space is formed between the support and the coal wall during the support work.
The hydraulic support for a soil-like coal face according to claim 8, wherein the bottom surface (1b) of the front probe beam (1) is a sloped surface and has an angle of 5° to 10° with the horizontal plane.
A method for protecting coal-like coal seams, characterized in that the soil-like coal face hydraulic support according to any one of claims 1 to 9 is used, and the protection method comprises:

Step 1: When the coal mining machine drum mining coal wall reaches the position of the hydraulic support, recover the front probe beam and the guard plate of the hydraulic support to cut coal;

Step 2: After the coal cutting is completed, the support column of the hydraulic support is recovered, and the hydraulic support is advanced forward by the scraper conveyor and the shifting jack, and then the support column is raised to support the support top beam;

Step 3: Opening the front probe beam jack to force the front probe beam to insert into the coal wall, and opening the guard panel jack to open the guard panel;

Step 4: Use the push jack to push the scraper conveyor and the shearer forward, waiting for the next mining.