CN110469355A - The Split type hydraulic support of ultra-thin coal seam - Google Patents

Abstract

The invention discloses a split-type hydraulic support for an extremely thin coal seam, which comprises several sets of support assemblies arranged side by side. The connecting plate between the front brackets; the front bracket includes a front base, a front roof beam located above the front base, and a front hydraulic column supported between the front base and the front roof beam, on the front base A push jack is installed, the output shaft of the push jack faces forward and is connected with the work surface slide; The rear hydraulic column between the beams; the two ends of the connecting plate are respectively connected with the front base and the rear base. The present invention can satisfy the working space of the on-site workers to the greatest extent, and reduce the labor intensity and danger of the workers.

Description

Split hydraulic support for extremely thin coal seam

technical field

The invention relates to the technical field of mining, in particular to a split hydraulic support for extremely thin coal seams.

Background technique

The existing hydraulic supports are all integrated, which are divided into supporting hydraulic supports (a support consists of two hydraulic props and a link mechanism at the end of the support), supporting and shielding hydraulic supports (a support consists of four hydraulic props and a tail link organization).

In the application process of the existing hydraulic support, each support can be used directly by linking with the work surface slider. The on-site operators can move in the safe space supported by the hydraulic support. Since the hydraulic support is composed of the top beam, base, hydraulic prop, The link mechanism and other components, the top beam and the base of the hydraulic support are welded by thick steel plates, that is to say, the top beam and the base are both thick, assuming that the coal seam thickness of the coal mining face is 1.0 meters, the existing integrated hydraulic support is used Installed on the mining face, the overall height of the support is 1.0 meters, the thickness of the top beam of the support is 0.3 meters, the thickness of the base is 0.25 meters, and the space under the support is only 0.45 meters high. Operators cannot move in such a narrow space, and there is no working space to operate the equipment.

The existing integrated hydraulic support is used to mine coal seams with a thickness of more than 1.5 meters. Operators can operate equipment in the space supported by the hydraulic support from 1.5 meters to 0.55 meters = 0.9 meters. The working space in the support can also meet the needs of employees to operate equipment. However, the hydraulic support cannot meet the working space of the on-site operators when the thickness of the recovered coal seam is less than 1.5 meters.

At present, the working face of the coal mine mining the coal seam below 1.5 meters uses the hydraulic unit as the main support method. Every time the working face is mined in a cycle, a row of monomers must be retracted, and then a row of monomers must be laid, and the roof is manually laid. The labor intensity of the workers is extremely high, and it is accompanied by the danger of withdrawing from the single body. With the development of the times, front-line employees in coal mines are decreasing year by year. For coal seams above 1.5 meters, the current fully mechanized mining hydraulic supports can fully meet the needs of mechanized mining. For coal seams below 1.5 meters, the existing fully mechanized mining hydraulic supports are used. Due to the design strength of fully mechanized mining hydraulic support, the overall support takes up a lot of space, and the space inside the support is small. Operators cannot operate equipment in the space supported by the existing fully mechanized mining hydraulic support.

Contents of the invention

Aiming at the defects in the prior art, the present invention provides a split type hydraulic support for extremely thin coal seams, so as to satisfy the working space of on-site workers to the greatest extent and reduce the labor intensity and danger of the workers.

The present invention provides a split type hydraulic support for extremely thin coal seams, which includes several sets of support components arranged side by side, and the support components include: a front support, the front support includes a front base, and a front base arranged above the front base. The top beam and the front hydraulic column supported between the front base and the front top beam, a push jack is installed on the front base, and the output shaft of the push jack faces forward and is connected with the working face slider; a rear support behind the front support, the rear support includes a rear base, a rear roof beam above the rear base, and a rear hydraulic column supported between the rear base and the rear roof beam; A connecting plate between the bracket and the front bracket, the two ends of the connecting plate are respectively connected with the front base and the rear base.

Further, the front base is composed of two symmetrical front base units, the moving jack is installed between the two front base units, and the front hydraulic column is provided with two, two front hydraulic The columns are respectively supported between the corresponding front base unit and the front top beam; the rear base is composed of two symmetrical rear base units, and there are two rear hydraulic columns, which are respectively supported between the corresponding rear base unit and the rear top beam; there are two connecting plates, and the two connecting plates are respectively connected between the corresponding front base unit and the rear base unit.

Further, a front guide assembly is provided between the two front hydraulic uprights, the front guide assembly includes a first lower guide sleeve and a first upper guide sleeve fixed on the front base, the first The lower guide sleeve and the first upper guide sleeve are slidingly socketed, and a rear guide assembly is arranged between the two rear hydraulic columns, and the rear guide assembly includes a second lower guide sleeve fixed on the rear base and the second upper guide sleeve, the second lower guide sleeve and the second upper guide sleeve are slidingly sleeved.

Further, the outer casing of the moving jack is provided with a moving frame, the output shaft of the moving jack is connected to the front of the moving frame, and the front of the moving frame is connected to the working surface slide.

Further, both ends of the connecting plate are hinged to the front base and the rear base respectively.

Further, one side of the front base and the rear base is provided with bottom adjustment jacks, and the output shafts of each bottom adjustment jack face outward and are respectively connected to the front base and the rear base of adjacent bracket assemblies.

Further, one side of the front base and the rear base is respectively provided with two bottom adjustment jacks, and the output ends of the two bottom adjustment jacks on the front base are hinged to the front push plate, and the front push plate is fixed On the side of the front base of the adjacent group of bracket components, the output ends of the two bottom adjustment jacks on the rear base are hinged to the rear side push plate, and the rear side push plate is connected to the rear base of the adjacent group of bracket components. side.

The beneficial effect of the present invention is reflected in: the bracket assembly of the present application is arranged along the working surface, the moving jack of the front bracket is connected with the slider of the working surface, and the front base of the front bracket is connected with the rear base of the rear bracket through a connecting plate. When the split hydraulic support supports the mining face, the front base and the rear base are respectively supported on the bottom of the working face, the front top beam and the rear top beam are respectively supported on the top of the working face, and the area between the front support and the rear support Provide working space for the staff, the front support and the rear support do not occupy this area, so the height of the area between the front support and the rear support is basically equal to the height of the coal seam, which guarantees the operating space of the operator to the greatest extent, so that both It can ensure the support strength of the working face and ensure the working space of the operators, which lays the foundation for the realization of artificial intervention in the intelligent fully mechanized mining face. Push forward a cutting depth, after the working face slider is in place, the front hydraulic column and the rear hydraulic column will descend, and then push the jack to directly pull each bracket assembly forward for a cutting depth, after the bracket assembly is in place, the front hydraulic column and the rear hydraulic column will rise height, so that the front roof beam and the rear roof beam can be pressed tightly under the top of the working face, so that every time the mining cycle of the working face is recovered, the slider and the hydraulic support of the working face can be controlled to move a cut depth to the working face without the need Manual roofing reduces the labor intensity of the on-site staff and ensures the safety of the staff.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the connection between two adjacent groups of support components;

Fig. 4 is a plan view of the bracket assembly of the embodiment of the present invention.

In the accompanying drawings: 100 represents the bracket assembly; 200 represents the working face slider; 1 represents the front support; 11 represents the front base; 12 represents the front top beam; 13 represents the front hydraulic column; 14 represents the first lower guide sleeve; 15 represents the first 2 indicates the rear bracket; 21 indicates the rear base; 22 indicates the rear top beam; 23 indicates the rear hydraulic column; 24 indicates the second lower guide sleeve; 25 indicates the second upper guide sleeve; 3 indicates the connecting plate; 41 represents the push jack; 42 represents the push frame; 51 represents the bottom adjustment jack; 52 represents the front side push plate; 53 represents the rear side push plate.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

As shown in Figures 1 to 4, the embodiment of the present invention provides a split-type hydraulic support for extremely thin coal seams, including several sets of support assemblies 100 arranged side by side, and each support assembly 100 is arranged along the working surface.

The bracket assembly 100 includes a front bracket 1 , a rear bracket 2 disposed behind the front bracket 1 , and a connecting plate 3 disposed between the front bracket 1 and the front bracket 1 . The front support 1 comprises a front base 11, a front top beam 12 located above the front base 11, and a front hydraulic column 13 supported between the front base 11 and the front top beam 12. The front base 11 is equipped with a push jack 41, which pushes the jack The output shaft of 41 faces forward and links to each other with the working face chute 200. Here, the "working face chute 200" is a scraper conveyor extending along the length direction of the working face, which is used to convey the coal mined by the shearer. In this embodiment, the push The jack 41 jacket is provided with a push frame 42, the output shaft of the push jack 41 is connected with the front portion of the push frame 42, the front portion of the push frame 42 is linked with the work face slider 200, and the push jack 41 is linked with the work face slip 200 through the push frame 42 , The moving frame 42 has a stabilizing effect on the output shaft of the moving jack 41.

The rear bracket 2 includes a rear base 21 , a rear top beam 22 arranged above the rear base 21 , and a rear hydraulic column 23 supported between the rear base 21 and the rear top beam 22 . The two ends of connecting plate 3 are connected with front base 11 and rear base 21 respectively, and in this embodiment, the two ends of connecting plate 3 are hinged with front base 11 and rear base 21 respectively, so that front base 11 and rear base 21 are on the left and right sides. The direction can be relatively swayed to prevent the front base 11 and the rear base 21 from moving inconsistently when the front base 11 and the rear base 21 are adjusted laterally, causing the connecting plate 3 to be broken.

The bracket assembly 100 of the present application is arranged along the working surface, the moving jack 41 of the front bracket 1 is connected with the slider 200 of the working surface (the front bracket 1 is connected with the slider 200 of the working surface without distance), the front base 11 of the front bracket 1 is connected with the rear bracket 2 The rear bases 21 are connected through the connecting plate 3 (there is a distance of about 500mm between the front support 1 and the rear support 2). When using the split hydraulic support to support the mining face, the front base 11 and the rear base 21 are Supported at the bottom of the work surface, the front top beam 12 and the rear top beam 22 are respectively supported on the top of the work surface, the area between the front support 1 and the rear support 2 provides work space for the staff, and the front support 1 and the rear support 2 are not separated. Occupies this area, so the height of the area between the front support 1 and the rear support 2 is basically equal to the height of the coal seam, which ensures the operating space of the operators to the greatest extent, which can not only ensure the support strength of the working face, but also ensure the operation The working space for personnel lays the foundation for the realization of artificial intervention in the intelligent fully mechanized mining face. When the working face is recovered to a cutting depth (about 800mm), the pushing jack 41 of each support assembly 100 is controlled to push the working face slider 200 forward at the same time. A cutting depth (about 800㎜), after the working face slider 200 is in place, the front hydraulic column 13 and the rear hydraulic column 23 land, and then push the jack 41 to directly pull each support assembly 100 forward for a cutting depth (about 800㎜). After the assembly 100 is put in place, the front hydraulic column 13 and the rear hydraulic column 23 are raised to press the front top beam 12 and the rear top beam 22 tightly under the top of the working face respectively, so that every mining cycle of the working face can Realize the control of the working surface slider 200 and the hydraulic support to move a cut depth to the working surface, without manual topping, which reduces the labor intensity of the on-site staff and ensures the safety of the staff.

As a further improvement of the above scheme, the front base 11 is composed of two symmetrical front base units. The push jack 41 is installed between the two front base units. There are two front hydraulic columns 13, and the two front hydraulic columns 13 are respectively supported between the corresponding front base unit and the front top beam 12 . The rear base 21 is composed of two symmetrical rear bases 21 , and there are two rear hydraulic uprights 23 . The two rear hydraulic uprights 23 are respectively supported between the corresponding rear base 21 and the rear top beam 22 . Two connecting plates 3 are provided, and the two connecting plates 3 are respectively connected between the corresponding front base unit and the rear base unit 21 . By arranging two front base units and two front hydraulic uprights 13 , two rear bases 21 units and two rear hydraulic uprights 23 , the support stability of the bracket can be improved. Of course, in other embodiments, the front base 11 and the rear base 21 can also respectively adopt an integrated structure.

As a further improvement of the above scheme, in order to improve the stability of the lifting and supporting of the front top beam 12, a front guide assembly is arranged between the two front hydraulic columns 13, and the front guide assembly includes a first lower guide sleeve fixed on the front base 11 The cylinder 14 and the first upper guide sleeve 15, and the first lower guide sleeve 14 and the first upper guide sleeve 15 are slidingly socketed. Similarly, in order to improve the stability of the lifting and supporting of the rear top beam 22, the two rear hydraulic pressure A rear guide assembly is arranged between the columns 23, and the rear guide assembly includes a second lower guide sleeve 24 and a second upper guide sleeve 25 fixed on the rear base 21, and the second lower guide sleeve 24 and the second upper guide sleeve The barrel 25 is slidably socketed.

In addition, one side of the front base 11 and the rear base 21 is provided with bottom adjustment jacks 51, and the output shafts of each bottom adjustment jack 51 face outward and are respectively connected to the front base 11 and the rear base 21 of the adjacent bracket assembly 100. The split hydraulic support can adjust the distance between two adjacent groups of support assemblies 100 through the bottom adjustment jack 51 to meet the needs of the support position. Specifically, in order to improve the balance of force when the bracket assembly 100 is pushed sideways to improve the stability of the side push, two bottom adjustment jacks 51 are respectively provided on one side of the front base 11 and the rear base 21, and are located on the front base 11. The output ends of the two bottom adjustment jacks 51 are hinged to the front side push plate 52, and the front side push plate 52 is fixed on the side of the front base 11 of the adjacent group of bracket assemblies 100, and the two bottom adjustment jacks located on the rear base 21 The output end of 51 is hinged to the rear side push plate 53 , and the rear side push plate 53 is connected to the side of the rear base 21 of the adjacent bracket assembly 100 .

In this embodiment, the design of narrow and short top beams is adopted, the strength is set according to the single column 1000 kN, the support strength of a single frame is 2000 kN, and the total support strength of the front support 1 and the rear support 2 is 4000 kN. Front bracket 1 and rear bracket 2 are connected by connecting plate 3 (steel plate), and the base and top beam are supported by a hydraulic column + guide sleeve. The overall structure is simple, flexible, and the support strength meets the needs of the site.

To sum up, this embodiment not only has the supporting strength of the fully mechanized mining hydraulic support, but also has the space for workers to walk, operate equipment, and repair equipment under the extremely thin coal seam height.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention.

Claims (7)

1. A split-type hydraulic support for an extremely thin coal seam, comprising several groups of support assemblies arranged side by side, characterized in that the support assembly includes: The front bracket, the front bracket includes a front base, a front top beam arranged above the front base, and a front hydraulic column supported between the front base and the front top beam, and a moving jack is installed on the front base, The output shaft of the moving jack faces forward and is connected with the working face chute; a rear support arranged behind the front support, the rear support includes a rear base, a rear roof beam arranged above the rear base, and a rear hydraulic column supported between the rear base and the rear roof beam; And a connecting plate arranged between the front bracket and the front bracket, the two ends of the connecting plate are respectively connected with the front base and the rear base. 2. The split-type hydraulic support for extremely thin coal seams according to claim 1, wherein the front base is composed of two symmetrical front bases, and the moving jack is installed on the two front bases Between the monomers, there are two front hydraulic uprights, and the two front hydraulic uprights are respectively supported between the corresponding front base unit and the front top beam; the rear base is composed of two symmetrical rear base units Composition, the rear hydraulic column is provided with two, and the two rear hydraulic columns are respectively supported between the corresponding rear base unit and the rear top beam; the connecting plate is provided with two, and the two connecting plates are respectively connected to the corresponding between the front base unit and the rear base unit. 3. The split hydraulic support for extremely thin coal seam according to claim 2, characterized in that, a front guide assembly is arranged between the two front hydraulic uprights, and the front guide assembly includes The first lower guide sleeve and the first upper guide sleeve, the first lower guide sleeve and the first upper guide sleeve are slidingly socketed, and a rear guide assembly is arranged between the two rear hydraulic columns, so The rear guide assembly includes a second lower guide sleeve and a second upper guide sleeve fixed on the rear base, and the second lower guide sleeve and the second upper guide sleeve are slidingly sleeved. 4. The split type hydraulic support for extremely thin coal seam according to claim 2, characterized in that, the outer casing of the push jack is provided with a push frame, the output shaft of the push jack is connected with the front part of the push frame, and the push frame The front part is linked with the work surface slipper. 5. The split type hydraulic support for extremely thin coal seam according to claim 1, characterized in that, the two ends of the connecting plate are respectively hinged to the front base and the rear base. 6. The split-type hydraulic support for extremely thin coal seams according to any one of claims 1-5, characterized in that, one side of the front base and the rear base are provided with bottom adjustment jacks, and each of the bottom adjustment jacks The output shaft of the output shaft is connected to the front base and the rear base of the adjacent group of bracket assemblies respectively towards the outside. 7. The split type hydraulic support for extremely thin coal seams according to claim 6, characterized in that, one side of the front base and the rear base are respectively provided with two bottom adjustment jacks, and the two bottom jacks on the front base The output end of the adjustment jack is hinged to the front push plate, and the front push plate is fixed on the side of the front base of the adjacent group of bracket components, and the output ends of the two bottom adjustment jacks on the rear base are hinged to the rear push plate. plate, and the rear side push plate is connected to the side of the rear base of the adjacent group of bracket assemblies.