Gob-side entry retaining waste rock blocking support set

Abstract

The utility model discloses a gob-side entry retaining waste rock blocking support group, which relates to the technical field of coal mine support equipment and comprises a first support group and a second support group, and the first support group and the second support group respectively comprise a plurality of roadway protection devices. Each roadway protection device comprises a front base, a rear base hinged to the front base, a front top beam and a rear top beam hinged to the front top beam. Lifting units are installed between the front base and the front top beam and between the rear base and the rear top beam respectively. Each lifting unit comprises a plurality of stand columns and a plurality of swing rods. Side guard plates are arranged on the side surfaces of the front top beam and the rear top beam; the tops of the side guard plates are hinged to the front top beam or the rear top beam; the end parts of the first support group and the second support group are flush, and the steps at the tail ends of the first support group and the second support group are arranged in a step shape. Therefore, through the arrangement of the first support group and the second support group which are arranged in the step shape, the complete solidification of the support column is ensured, the impact force is reduced, and the safety of a roadway is further ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mine support equipment, specifically to a goaf retaining rock support group. Background Technology

[0002] Coal is the foundation of my country's social and national economic development, accounting for more than 70% of my country's energy consumption for a long time. During the mining process, in order to ensure construction safety, coal pillars are reserved between the transport roadway and the return airway in the mining area. The main function of the goaf-side roadway is to use technical means to re-support the original return roadway along the edge of the goaf, so that it can be used as the roadway (such as the return airway) of the next working face. This allows the recovery of the protective coal pillars left in traditional mining methods. The most common method is to rebuild the roadway support pillar, using flexible molds as concrete templates to pour a continuous concrete wall. When the concrete is completely solidified, it can support the original return roadway.

[0003] In the prior art, there is a patent document with publication number CN221879452U entitled "A Support for Retaining Rock in Goaf Retention Roadways in Fully Mechanized Mining." This document describes a solution to the problem of rock inflow into the roadway via a base telescopic rock retaining device mounted on the support base and a top beam telescopic rock retaining device mounted on the support top beam. However, due to the complex environment within the roadway, and the large span of a single support top beam, this device is extremely heavy and cannot be adjusted in angle. When both sets of crossbeams advance simultaneously, if the concrete is not fully solidified, the pressure on the bottom support base will increase dramatically. This instantaneous pressure can easily damage part of the support equipment. Furthermore, the installation of the top beam and the rock retaining plates on the sides of the support is difficult, and the variety of equipment types makes maintenance and installation challenging. Utility Model Content

[0004] To overcome the above-mentioned defects, the purpose of this utility model is to provide a goaf retaining rock support group, which ensures the complete solidification of the support column, reduces impact force, simplifies installation, and improves the safety of the roadway by setting up a first support group and a second support group arranged in a stepped manner.

[0005] To achieve the above objectives, this utility model provides a roadway retaining support assembly, characterized in that it includes a first support assembly and a second support assembly, each comprising a plurality of roadway protection devices; each roadway protection device includes: a front base and a rear base hinged to the front base, a front top beam and a rear top beam hinged to the front top beam; a lifting unit is respectively installed between the front base and the front top beam, and between the rear base and the rear top beam, the lifting unit including a plurality of columns and a plurality of swing rods; side guard plates are provided on the sides of both the front top beam and the rear top beam, the top of the side guard plates being hinged to the front top beam or the rear top beam; a shield beam is also hinged between the rear top beam and the rear base, and a connecting rod is hinged between the shield beam and the rear base; the ends of the first support assembly and the second support assembly are flush, and the end steps of the first support assembly and the second support assembly are arranged in a stepped manner.

[0006] Preferably, the front base includes a first front base and a second front base arranged side by side, and a first auxiliary push cylinder is hinged between the first front base and the second front base;

[0007] The rear base includes a first rear base and a second rear base arranged side by side, and a second auxiliary push cylinder is hinged between the first rear base and the second rear base.

[0008] Preferably, the front top beam includes a first front top beam and a second front top beam, the rear top beam includes a first rear top beam and a second rear top beam, a first auxiliary hydraulic adjustment frame is hinged between the first front top beam and the second front top beam, and a second auxiliary hydraulic adjustment frame is hinged between the first rear top beam and the second rear top beam.

[0009] Preferably, the lower end of the side guard plate is lower than the front base or the rear base, and is limited and fixed by the front base or the rear base.

[0010] Preferably, the first support group is close to the support column, and the length of the rear top beam in the first support group is greater than the length of the rear top beam in the second support group.

[0011] The beneficial technical effects achieved by this utility model after adopting the above technical solution are as follows:

[0012] 1. Due to the installation of multiple roadway protection devices, each roadway protection device includes a front base and a rear base hinged to the front base, a front top beam and a rear top beam hinged to the front top beam; lifting units are respectively installed between the front base and the front top beam, and between the rear base and the rear top beam, each lifting unit including multiple columns and multiple swing rods; the columns and swing rods of the front base are used to support the front top beam, and the columns and swing rods of the rear base are used to support the rear top beam. The front and rear top beams are hinged, thus allowing them to swing, increasing flexibility, significantly reducing weight, making installation more convenient, and making them suitable for more complex environments, especially roadways with a certain angle of inclination, and also facilitating subsequent adjustments.

[0013] 2. The ends of the first and second support groups are level, and the steps at the ends of the first and second support groups are arranged in a stepped manner. The first and second support groups effectively seal off one side of the goaf. The stepped arrangement of the first and second support groups reduces the impact force caused by roof slump. Especially during the movement, there is always one support group providing support. The use of long support ensures that the support columns built on the roadway side can completely solidify, thus supporting the roadway roof and significantly increasing construction safety.

[0014] 3. Since the upper end of the side guard plate is hinged to the front or rear top beam, the distance below the side guard plate is appropriately increased, and it is limited by the front or rear base below. This installation method is simpler and has lower maintenance costs. With the front or rear top beam, a sealed space can be quickly formed to prevent debris from being trapped. No other auxiliary fixing equipment is required, so it is more practical. Attached Figure Description

[0015] Figure 1 This is a top view reference diagram of the present invention;

[0016] Figure 2 This is a schematic diagram showing the positional comparison between the first support group and the second support group in the main view of this utility model;

[0017] In the diagram,

[0018] 1. First support assembly; 11. Roadway protection device; 12. Front base; 13. Rear base; 14. Front roof beam; 141. First front roof beam; 142. Second front roof beam; 15. Rear roof beam; 151. First rear roof beam; 152. Second rear roof beam;

[0019] 2. Second support assembly; 21. First auxiliary push cylinder; 22. Second auxiliary push cylinder; 23. First auxiliary hydraulic adjustment frame; 24. Second auxiliary hydraulic adjustment frame;

[0020] 3. Lifting unit; 31. Column; 32. Swing rod;

[0021] 4. Side guards;

[0022] 5. Protective beam; 51. Connecting rod;

[0023] 6. Move the jack. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0025] See Figure 1 , Figure 2 This utility model provides a goaf retaining wall support assembly, including a first support group 1 and a second support group 2. The first support group 1 and the second support group 2 each include several roadway protection devices 11. Each roadway protection device 11 includes: a front base 12 and a rear base 13 hinged to the front base 12, a front top beam 14 and a rear top beam 15 hinged to the front top beam 14. Lifting units 3 are respectively installed between the front base 12 and the front top beam 14, and between the rear base 13 and the rear top beam 15. The lifting unit 3 includes multiple columns 31 and multiple swing rods 32. To improve the stability of the support, two support groups are generally used, namely the first support group 1 and the second support group 2. Each support group includes multiple roadway protection devices 11. For ease of description, multiple directional terms "front" and "rear" appear in the text. The columns 31 in the lifting unit 3 serve as the power source for upward lifting and can be used alone or in conjunction with the swing rods 32. The locking of the swing rods 32 ensures lifting safety.

[0026] Both the front top beam 14 and the rear top beam 15 are equipped with side guard plates 4, the top of which is hinged to the front top beam 14 or the rear top beam 15. A shield beam 5 is also hinged between the rear top beam 15 and the rear base 13, and a connecting rod 51 is hinged between the shield beam 5 and the rear base 13. The ends of the first support group 1 and the second support group 2 are flush, and the steps at the ends of the first support group 1 and the second support group 2 are arranged in a stepped manner. In actual use, the front top beam 14, the rear top beam 15, the side guard plates 4, and the rear shield beam 5 together form a closed space to protect the gangue and ensure safety.

[0027] Because concrete is used for casting, the ends of the first support group 1 and the second support group 2 are arranged in a stepped manner. After the end of the first support group 1 has moved, the time is extended, which not only ensures that the concrete is completely solidified, but also avoids the instantaneous impact force caused by the descent of the top plate, thus ensuring the safety of the equipment. In this utility model, the first support group 1 is close to the support column, and the length of the rear top beam 15 in the first support group 1 is greater than the length of the rear top beam 15 in the second support group 2. Figure 1 In the middle, the circular part is the support column, and to the right of the support column are multiple unit supports.

[0028] During use, it was found that when the roof support reaches more than 10 meters, after coal mining, support columns are made on the side of the roadway. As the first support group 1 and the second support group 2 move forward, when the moving distance of the first support group 1 completely exceeds that of the support column, the support column has completely solidified and can effectively support the roof of the roadway, thus achieving roadway retention along the goaf.

[0029] The front base 12 of this utility model includes a first front base 12 and a second front base 12 arranged side by side, with a first auxiliary push cylinder 21 hinged between the first front base 12 and the second front base 12; the rear base 13 includes a first rear base 13 and a second rear base 13 arranged side by side, with a second auxiliary push cylinder 22 hinged between the first rear base 13 and the second rear base 13. The front top beam 14 of this utility model includes a first front top beam 141 and a second front top beam 142, and the rear top beam 15 includes a first rear top beam 151 and a second rear top beam 152. A first auxiliary hydraulic adjustment frame 23 is also hinged between the first front top beam 141 and the second front top beam 142; a second auxiliary hydraulic adjustment frame 24 is hinged between the first rear top beam 151 and the second rear top beam 152. A first auxiliary pushing cylinder 21 is hinged between the first front base 12 and the second front base 12. When used in conjunction with the pushing jack 6 and the second auxiliary pushing cylinder 22, it enables step-like movement. This part is prior art and is described in more detail in patent publication number CN221879452U. The first auxiliary hydraulic adjustment frame 23 and the second auxiliary hydraulic adjustment frame 24 serve to assist in support and adjust the spacing, preventing tilting under excessive pressure.

[0030] The lower end of the side guard plate 4 of this utility model is lower than the front base 12 or the rear base 13, and is limited and fixed by the front base 12 or the rear base 13. It is used to block the gangue on the side. During installation, the upper end of the side guard plate 4 is hinged by a pin, and the lower end is limited by the front base 12 or the rear base 13 to block the gangue and ensure construction safety.

[0031] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A support assembly for retaining waste rock along a goaf, characterized in that, It includes a first support group and a second support group, each of which contains several roadway protection devices. Each of the aforementioned roadway protection devices includes: a front base and a rear base hinged to the front base, a front top beam and a rear top beam hinged to the front top beam; a lifting unit is respectively installed between the front base and the front top beam, and between the rear base and the rear top beam, and the lifting unit includes multiple columns and multiple swing arms; Both the front top beam and the rear top beam are provided with side guard plates, and the top of the side guard plate is hinged to the front top beam or the rear top beam; a shield beam is also hinged between the rear top beam and the rear base, and a connecting rod is hinged between the shield beam and the rear base. The ends of the first support group and the second support group are level, and the ends of the first support group and the second support group are arranged in a stepped manner.

2. The goaf retaining rock retaining support assembly according to claim 1, characterized in that, The front base includes a first front base and a second front base arranged side by side, and a first auxiliary push cylinder is hinged between the first front base and the second front base. The rear base includes a first rear base and a second rear base arranged side by side, and a second auxiliary push cylinder is hinged between the first rear base and the second rear base.

3. The goaf retaining rock retaining support assembly according to claim 2, characterized in that, The front top beam includes a first front top beam and a second front top beam, and the rear top beam includes a first rear top beam and a second rear top beam. A first auxiliary hydraulic adjustment frame is also hinged between the first front top beam and the second front top beam; a second auxiliary hydraulic adjustment frame is hinged between the first rear top beam and the second rear top beam.

4. The goaf retaining wall support assembly according to claim 1, characterized in that, The lower end of the side guard plate is lower than the front base or the rear base, and is limited and fixed by the front base or the rear base.

5. The goaf retaining wall support assembly according to claim 1, characterized in that, The first support group is close to the support column, and the length of the rear top beam in the first support group is greater than the length of the rear top beam in the second support group.

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