Gob-side entry retaining top-cutting pressure-relief entry protecting structure for top-coal-retaining roadway

Abstract

The utility model discloses a top coal roadway gob-side entry retaining top cutting pressure relief roadway protecting structure which comprises a bottom plate, a supporting structure and a supporting pressure relief structure, the supporting structure is arranged on the bottom plate, the supporting pressure relief structure is arranged on the supporting structure, and the supporting structure comprises a hydraulic cylinder, a limiting groove, a first supporting beam, a second supporting beam, a top plate, a lug plate and a base. The hydraulic cylinders are fixedly arranged on the left side and the right side of the bottom plate in an arrayed mode, the limiting grooves are fixedly formed in the upper portions of the hydraulic cylinders, and the first supporting beams are fixedly arranged on the upper portions of the limiting grooves. The utility model belongs to the technical field of roadways, and particularly relates to a gob-side entry retaining top-cutting pressure-relief roadway protecting structure for a top-coal-retaining roadway, which effectively solves the problems that a gob-side entry retaining top-cutting pressure-relief roadway protecting structure still has many defects in use, a gob side top-cutting rock stratum gradually collapses, gob gangue impacts the side wall of a roadway, and the roadway side wall is damaged. The problems that the stress of a roadway protection structure is increased, roadway protection supporting columns are pressed and inclined, and a roadway collapses are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of roadways, and specifically refers to a roof coal-retaining roadway gob-side entry retaining structure with roof cutting and pressure relief for roadway protection. Background Art

[0002] The conventional technology of gob-side entry retaining with roof cutting and pressure relief is to pre-split and blast at the shoulder angle of the roadway on the goaf side in front of the working face. By using this method, the phenomenon of hanging roof can be eliminated, the overlying load and rotational deformation pressure on the cantilever beam of the roof of the gob-side roadway can be reduced, thus greatly reducing the load transferred from the rock beam to the roadside support and the in-roadway support, and improving the mechanical environment of the roadway. This technology is mostly used in gob-side entry retaining with full height mining at one time. The roof cutting and pressure relief gob-side entry retaining support structure is a mechanism for controlling mine pressure and rock strata in coal mining, usually installed on the goaf side of the roadway, and plays a very important role in the process of coal mining.

[0003] There are still many deficiencies in the existing roof cutting and pressure relief gob-side entry retaining support structure during use. The roof cutting rock strata on the goaf side gradually collapse, and the goaf gangue impacts the side wall of the roadway, resulting in an increase in the force on the roadway protection structure and the compression and inclination of the roadway protection support columns, causing the roadway to collapse. Summary of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the utility model proposes a roof coal-retaining roadway gob-side entry retaining structure with roof cutting and pressure relief for roadway protection, which effectively solves the problems that there are still many deficiencies in the existing roof cutting and pressure relief gob-side entry retaining support structure during use, the roof cutting rock strata on the goaf side gradually collapse, the goaf gangue impacts the side wall of the roadway, resulting in an increase in the force on the roadway protection structure, and the compression and inclination of the roadway protection support columns, causing the roadway to collapse.

[0005] The technical solution adopted by the utility model is as follows: A roof coal-retaining roadway gob-side entry retaining structure with roof cutting and pressure relief for roadway protection proposed by the utility model includes a bottom plate, a support structure and a support and pressure relief structure. The support structure is arranged on the bottom plate, and the support and pressure relief structure is arranged on the support structure. The support structure includes hydraulic cylinders, limit grooves, support beam one, support beam two, a roof plate, ear plates and a base. The hydraulic cylinders are fixedly arranged on the left and right sides of the bottom plate in a row. The limit grooves are fixedly arranged above the hydraulic cylinders. The support beam one is fixedly arranged above the limit grooves. The support beam two is snap-fitted above the support beam one. The roof plate is welded and fixed above the support beam two. The ear plates are welded on the left and right sides of the roof plate. The base is welded on the left and right sides of the bottom plate.

[0006] Preferably, the support and pressure relief structure includes a protection beam, bolts and a protection net. One end of the protection beam is limited on the base and the upper end is detachably arranged on the ear plate. The bolts penetrate through the ear plates and are fixedly arranged on the protection beam. The protection net is welded on the side of the protection beam.

[0007] To better achieve the effect of support, the second support beam is vertically and snap-fitted with the first support beam.

[0008] To achieve the purpose of protection and pressure relief more quickly, the protection beam is only subjected to lateral extrusion force and not to vertical support force.

[0009] Furthermore, the protection net is arranged as a metal material stamping integrated net.

[0010] To achieve the effect of improving force relief, the protection beam is arranged as a C-shaped steel, and the base is arranged as an L-shaped steel.

[0011] Adopting the above structure, the beneficial effects obtained by the present utility model are as follows: A roof-cutting pressure-relief roadway retaining structure for gob-side entry retaining in a top-coal roadway proposed by this solution, in which the lower end of the protection beam is fixed on the floor through the base, and the upper end is bolted to the ear plate, and the protection net is fixedly installed on the side to protect the crushed stones and relieve the force at the same time, avoiding the hydraulic cylinder from being bent due to force and causing the upper part of the roof to collapse downward due to the force. Description of the Drawings

[0012] Figure 1 It is the overall structure schematic diagram of a roof-cutting pressure-relief roadway retaining structure for gob-side entry retaining in a top-coal roadway proposed by the present utility model;

[0013] Figure 2 It is the sectional structure schematic diagram of a roof-cutting pressure-relief roadway retaining structure for gob-side entry retaining in a top-coal roadway proposed by the present utility model;

[0014] Figure 3 It is another sectional structure schematic diagram of a roof-cutting pressure-relief roadway retaining structure for gob-side entry retaining in a top-coal roadway proposed by the present utility model;

[0015] Figure 4 It is the third sectional structure schematic diagram of a roof-cutting pressure-relief roadway retaining structure for gob-side entry retaining in a top-coal roadway proposed by the present utility model.

[0016] Among them, 1. Floor, 2. Support structure, 3. Support and pressure relief structure, 4. Hydraulic cylinder, 5. Limit groove, 6. First support beam, 7. Second support beam, 8. Roof, 9. Ear plate, 10. Base, 11. Protection beam, 12. Bolt, 13. Protection net.

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figure 1 , Figure 2 and Figure 3 shown, a roof coal roadway gob-side entry retaining roof cutting and pressure-relieving roadway protection structure proposed by the present utility model includes a bottom plate 1, a support structure 2 and a support and pressure-relieving structure 3. The support structure 2 is arranged on the bottom plate 1, and the support and pressure-relieving structure 3 is arranged on the support structure 2. The support structure 2 includes a hydraulic cylinder 4, a limit groove 5, a first support beam 6, a second support beam 7, a roof plate 8, an ear plate 9 and a base 10. The hydraulic cylinders 4 are fixedly arranged on the left and right sides of the bottom plate 1 in a row. The limit groove 5 is fixedly arranged above the hydraulic cylinder 4. The first support beam 6 is fixedly arranged above the limit groove 5. The second support beam 7 is snap-fitted above the first support beam 6. The second support beam 7 is vertically and snap-connected with the first support beam 6 up and down. The roof plate 8 is welded and fixed above the second support beam 7. The ear plates 9 are welded on the left and right sides of the roof plate 8. The bases 10 are welded on the left and right sides of the bottom plate 1. The bases 10 are arranged with L-shaped steel.

[0020] As Figure 2 , Figure 3 and Figure 4 shown, the support and pressure-relieving structure 3 includes a protection beam 11, bolts 12 and a protection net 13. One end of the protection beam 11 is limited on the base 10 and the upper end is detachably arranged on the ear plate 9. The protection beam 11 is only subjected to lateral extrusion force and not vertical support force. The protection beam 11 is arranged with C-shaped steel. The bolts 12 penetrate through the ear plate 9 and are fixedly arranged on the protection beam 11. The protection net 13 is welded on the side of the protection beam 11. The protection net 13 is arranged with a metal material stamping integral net.

[0021] During specific use, when the user uses this device, first weld and fix the hydraulic cylinders 4 on the left and right sides of the bottom plate 1. At the same time, snap the limit grooves 5 on the first support beam 6 onto the top ends of the hydraulic cylinders 4. Then vertically clamp the second support beam 7 above the first support beam 6. Then lay the roof plate 8 above the first support beam 6 and align it with the bottom plate 1 up and down. Then control the hydraulic cylinders 4 to rise, so as to support the roof plate 8 to the top of the roadway for support and protection. Then first lay the protection net 13 on the two side walls of the roadway. Then weld the ear plates 9 to both sides of the roof plate 8, weld the bases 10 to both sides of the bottom plate 1. Then clamp the lower end of the protection beam 11 inside the base 10, fix the upper end of the protection beam 11 on the ear plate 9 with bolts 12, and at the same time weld the protection net 13 to the outside of the protection beam 11 to block and relieve pressure. The above is the entire use process of the roof coal roadway gob-side entry retaining roof cutting and pressure-relieving roadway protection structure.

[0022] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0024] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A top coal retaining roadway top cutting pressure relief roadway protection structure, characterized in that: It includes a bottom plate, a supporting structure and a supporting pressure relief structure, wherein the supporting structure is arranged on the bottom plate, and the supporting pressure relief structure is arranged on the supporting structure. The supporting structure includes a hydraulic cylinder, a limiting groove, a support beam 1, a support beam 2, a top plate, an ear plate and a base, wherein the hydraulic cylinder is fixedly arranged on the left and right sides of the bottom plate and arranged in an array, the limiting groove is fixedly arranged above the hydraulic cylinder, the support beam 1 is fixedly arranged above the limiting groove, the support beam 2 is snap-fitted above the support beam 1, the top plate is welded and fixedly arranged above the support beam 2, the ear plates are welded on the left and right sides of the top plate, and the base is welded on the left and right sides of the bottom plate.

2. A top coal retaining roadway top cutting pressure relief roadway protection structure according to claim 1, characterized in that: The support and pressure relief structure includes a protection beam, bolts and a protection net. One end of the protection beam is limited on the base and the upper end is disassembled and arranged on the ear plate. The bolts pass through the ear plate and are fixed on the protection beam. The protection net is welded on the side of the protection beam.

3. A top coal retaining roadway top cutting pressure relief roadway protection structure according to claim 2, characterized in that: The second support beam is vertically connected with the first support beam.

4. A top coal retaining roadway top cutting pressure relief roadway protection structure according to claim 3, characterized in that: The protection beam is only subjected to lateral squeezing force but not vertical supporting force.

5. A top-retaining coal roadway top-retaining roadway pressure-relieving and roadway-protecting structure according to claim 4, characterized in that: The protective net is formed by stamping an integrated net from a metal material.

6. A top-retaining coal roadway top-retaining roadway pressure-relieving and roadway-protecting structure according to claim 5, characterized in that: The protection beam is provided by C-shaped steel, and the base is provided by L-shaped steel.

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