Retractable gob-side entry retaining strut

Abstract

The utility model discloses a retractable gob-side entry retaining pillar, and particularly relates to the technical field of entry retaining gangue retaining support, which comprises a lower section I-shaped steel column, a cutting groove is arranged at the top of the lower section I-shaped steel column, and an upper section I-shaped steel column is slidably connected to the inner wall of the cutting groove. Two U-shaped mounting sleeves are jointly mounted on the outer surfaces of the upper section I-shaped steel column and the lower section I-shaped steel column, and an adjusting assembly is arranged in the lower section I-shaped steel column. According to the retractable gob-side entry retaining supporting column, by arranging the adjusting assembly, firstly, the downward sliding resistance of the upper I-shaped steel column is adjusted according to geological conditions, so that the retractable gob-side entry retaining supporting column can be used under different geological conditions, the upper I-shaped steel column can be prevented from sliding down excessively, and the supporting column can be used under different geological conditions; the continuous and sufficient supporting force of the supporting column on the top plate is guaranteed, the gliding resistance of the upper I-shaped steel column can be flexibly adjusted according to the specific geological condition, and the application range of the gob-side entry retaining technology in the complex geological area is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roadway retaining and gangue blocking support technology field, especially in pit along empty roadway retaining prop. BACKGROUND

[0002] With the application of the technology of no coal pillar mining cutting roof pressure and empty roadway retaining, it has far-reaching significance for the full mining of coal, but at present, rigid device is often used for roadway gangue blocking support, and the stress of deep roadway is high, the dynamic pressure influence is remarkable, the deformation of roadway is serious, especially on the side of the roadway retaining and gangue blocking support, the roadway is seriously deformed. The rigid gangue blocking support often bends and breaks due to the large deformation of deep surrounding rock, thereby losing the gangue blocking support capacity and causing the failure of roadway retaining.

[0003] In the patent document with the announcement number CN219412616U, a kind of pit along empty roadway retaining and gangue blocking support structure with shrinkability, including upper section I-beam column, lower section I-beam column and clamping assembly, the lower section I-beam column is equipped with the cutting groove of opening from top on lower web, the cutting groove is equipped with friction plate inside, upper section I-beam column is connected with the clamping of cutting groove and lower section I-beam column sliding connection by upper web, the device has significant pit along empty roadway retaining and gangue blocking support strength, compared with the U-shaped steel prop in prior art, I-beam has higher bending strength and bending stiffness, improves the stability of pit along empty roadway retaining and gangue blocking support but the above patent document still has the following defects in implementation process:

[0004] The device cannot adjust the resistance of the upper section I-beam column sliding downward in use, the upper section I-beam column may slide excessively due to insufficient resistance, resulting in insufficient support of the prop to the roof, affecting the stability and use safety of the roadway, and under different geological conditions, the pressure distribution and change law of pit along empty roadway retaining are quite different, the prop with adjustable resistance is difficult to adapt to these special conditions, limiting its application in complex geological conditions, therefore we propose a kind of pit along empty roadway retaining prop with shrinkability to solve the above problems. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a kind of pit along empty roadway retaining prop with shrinkability, which can effectively solve the above problems.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A kind of pit along empty roadway retaining prop with shrinkability, including lower section I-beam column, the lower section I-beam column top is provided with cutting groove, the cutting groove inner wall is slidably connected with upper section I-beam column, the outer surface of upper section I-beam column and lower section I-beam column is equipped with two U-shaped mounting sleeves, the lower section I-beam column is provided with adjusting assembly inside, the left side and right side of lower section I-beam column are provided with support assembly;

[0008] Preferably, the adjusting assembly comprises a rotating shaft, the outer surfaces of the left side and the right side of the rotating shaft are rotationally connected with the inner wall of the lower section I-shaped column, the left end of the rotating shaft is fixedly connected with a rotating block, and the outer surface of the rotating block is fixedly connected with a bevel gear one.

[0009] Preferably, the inner wall of the lower section I-shaped column is rotationally connected with a threaded rod, the top of the threaded rod is fixedly connected with a bevel gear two, the left top of the bevel gear two is meshedly connected with the right bottom of the bevel gear one, and the outer surface of the threaded rod is threadedly connected with a connecting frame.

[0010] Preferably, the top inner wall of the connecting frame is slidably connected with two sliding rods, the top of each of the two sliding rods is fixedly connected with a circular plate, and the top of each of the two circular plates is fixedly connected with the bottom of the upper section I-shaped column.

[0011] Preferably, the outer surface of each of the two sliding rods is sleeved with a spring, the top of each of the two springs is fixedly connected with the bottom of the circular plate on the same side, and the bottom of each of the two springs is fixedly connected with the top of the connecting frame.

[0012] Preferably, the two support assemblies are symmetrically arranged on the left and right sides of the center of the lower section I-shaped column, the support assembly comprises two sliding rails, and the end, close to the center of the lower section I-shaped column, of each of the two sliding rails is fixedly connected with the outer surface of the lower section I-shaped column.

[0013] Preferably, the inner walls of the two sliding rails are commonly slidably connected with a support plate, the end, away from the lower section I-shaped column, of the support plate is provided with two circular holes, and the inner walls of the two circular holes are threadedly connected with bolts.

[0014] Preferably, the left end and the right end of the lower section I-shaped column are provided with two circular holes, the inner walls of the two circular holes are provided with threads, and the outer surfaces of the two bolts, close to the center of the lower section I-shaped column, are threadedly connected with the inner walls of the circular holes on the same side.

[0015] Compared with the prior art, the adjusting assembly has the following beneficial effects:

[0016] 1、The adjusting assembly is arranged, specifically, the resistance of the upper section I-shaped column to downward sliding is adjusted according to the geological conditions, so that the upper section I-shaped column can be used under different geological conditions, the excessive downward sliding of the upper section I-shaped column can be prevented, the support of the column on the roof can be ensured to be continuous and sufficient, the downward sliding resistance of the upper section I-shaped column can be flexibly adjusted according to the specific geological conditions, and the application range of the gob-side entry retaining technology in the complex geological region is expanded.

[0017] 2, the utility model discloses a support assembly is set up, specifically is when the device installs use after, two support plates are installed respectively in the inside of corresponding two slide rails, and two support plates are fixed on the both sides of the lower section I -beam column through bolt, not only can improve the anti-inclination ability of the prop when receiving lateral force, reduce the possibility that the prop inclines or falls, and make the device can bear greater pressure without deformation or damage, prolong the service life of the prop, guarantee the supporting effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure schematic diagram of the utility model;

[0019] Figure 2 It is whole structure schematic diagram of the utility model pivot;

[0020] Figure 3 It is whole structure schematic diagram of the utility model connecting frame;

[0021] Figure 4 It is whole structure schematic diagram of the utility model support plate;

[0022] Figure 5 It is the top cutaway structure schematic diagram of the utility model lower section I -beam column.

[0023] In the drawing: 1, lower section I -beam column;11, upper section I -beam column;12, U type mounting sleeve;2, adjusting assembly;21, pivot;211, rotating block;212, conical gear one;22, threaded rod;221, conical gear two;222, connecting frame;23, sliding rod;231, spring;3, support assembly;31, slide rail;32, support plate;33, bolt;34, round hole. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0025] Embodiment one, as Figures 1-5 shown, a collapsible along empty roadway support, including lower section I -beam column 1, the lower section I -beam column 1 top is set with cutout, the cutout inner wall sliding connection has upper section I -beam column 11, the upper section I -beam column 11 and lower section I -beam column 1 outer surface jointly installs two U type mounting sleeves 12, the lower section I -beam column 1 inside is provided with adjusting assembly 2, the lower section I -beam column 1 left side and right side are provided with support assembly 3.

[0026] Specifically, in order to realize the purpose that the resistance of the upper section I -beam column sliding down can be adjusted, refer to Figure 2 and Figure 3In the embodiment, the adjusting assembly 2 comprises a rotating shaft 21, outer surfaces of left and right sides of the rotating shaft 21 are rotationally connected with inner walls of the lower section I-shaped steel column 1, a rotating block 211 is fixedly connected with a left end of the rotating shaft 21, and a conical gear one 212 is fixedly connected with an outer surface of the rotating block 211.

[0027] Further, referring to Figure 3 In the embodiment, a threaded rod 22 is rotationally connected with an inner wall of the lower section I-shaped steel column 1, a conical gear two 221 is fixedly connected with a top of the threaded rod 22, a left side top of the conical gear two 221 is meshingly connected with a right side bottom of the conical gear one 212, and a connecting frame 222 is threadedly connected with an outer surface of the threaded rod 22.

[0028] Further, referring to Figure 3 In the embodiment, two sliding rods 23 are slidingly connected with an inner wall of a top of the connecting frame 222, and two circular plates are fixedly connected with top of the two sliding rods 23, respectively.

[0029] Further, referring to Figure 3 In the embodiment, two springs 231 are sleeved with outer surfaces of the two sliding rods 23, respectively, top of each of the two springs 231 is fixedly connected with a bottom of the same side circular plate, and bottom of each of the two springs 231 is fixedly connected with a top of the connecting frame 222.

[0030] In the implementation process, when the device needs to be used to support the roadway, first, the resistance of the upper section I-shaped steel column 11 to slide downward is adjusted according to the geological conditions, so that it can be used under different geological conditions, the rotating block 211 is rotated clockwise to drive the rotating shaft 21 to rotate in the inner wall of the lower section I-shaped steel column 1, the rotating shaft 21 rotates clockwise to drive the conical gear two 221 to rotate through the conical gear one 212, the conical gear two 221 rotates clockwise to drive the connecting frame 222 to move upward, the connecting frame 222 moves upward to drive the two sliding rods 23 to slide in the inner wall of the top thereof, the sliding rods 23 slide to extrude the springs 231 to deform, the deformed springs 231 push the upper section I-shaped steel column 11 through the circular plates fixedly connected with the top thereof, the resistance of the upper section I-shaped steel column to slide downward can be matched with the actual situation as the deformation degree of the springs 231 changes, not only can the support make corresponding adjustment according to the pressure change to prevent the upper section I-shaped steel column 11 from sliding downward excessively, ensure that the support has continuous and sufficient supporting force on the roof, effectively control the roof subsidence, and maintain the stability of the roadway, but also can flexibly adjust the sliding resistance of the upper section I-shaped steel column 11 according to the specific geological conditions, better adapt to the pressure change under different geological conditions, and expand the application range of the gob-side entry retaining technology in the complex geological region.

[0031] Embodiment Two, this embodiment is based on the setting of the support assembly of embodiment one.

[0032] Specifically, in order to realize the stability of the whole device, referring to Figure 4 and Figure 5 In this embodiment, two support assemblies 3 are symmetrically arranged around the center of the lower section I-shaped column 1, and the support assembly 3 includes two slide rails 31, and one end of each of the two slide rails 31 near the center of the lower section I-shaped column 1 is fixedly connected to the outer surface of the lower section I-shaped column 1.

[0033] Further, referring to Figure 4 In this embodiment, the inner walls of the two slide rails 31 are commonly and slidably connected to a support plate 32, and the end of the support plate 32 away from the lower section I-shaped column 1 is provided with two circular holes, and the inner walls of the two circular holes are threadedly connected to two bolts 33.

[0034] Further, referring to Figure 5 In this embodiment, the left and right ends of the lower section I-shaped column 1 are provided with two circular holes 34, and the inner walls of the two circular holes 34 are provided with threads, and the outer surfaces of the two bolts 33 near the center of the lower section I-shaped column 1 are threadedly connected to the inner walls of the same side circular holes 34.

[0035] In the implementation process, when the device is installed and used, the two support plates 32 are respectively installed inside the corresponding two slide rails 31, and are pushed to slide downward so that the bottom of the support plate 32 can contact the ground. When the support plate 32 is installed, the two bolts 33 are inserted into the circular holes provided on the surface of the support plate 32, and the bolts 33 are rotated clockwise. As the bolts 33 rotate, the bolts 33 move towards the lower section I-shaped column 1. When the bolts 33 move a certain distance, the outer surfaces of the bolts 33 near the center of the lower section I-shaped column 1 are threadedly connected to the corresponding circular holes 34, so that the two support plates 32 can be fixed on both sides of the lower section I-shaped column 1. Not only can it improve the anti-inclination ability of the support column when subjected to lateral force, reduce the possibility of inclination or tilting of the support column, ensure the stability of the support structure in complex underground environment, but also make the device can withstand greater pressure without deformation or damage, prolong the service life of the support column, and ensure the supporting effect.

[0036] The working principle of the utility model is: when the device is needed to support the roadway, first, the resistance of the upper I-beam column 11 to slide downward is adjusted according to the geological conditions, so that it can be used under different geological conditions, the rotating block 211 is rotated clockwise to drive the rotating shaft 21 to rotate in the inner wall of the lower I-beam column 1, the rotating shaft 21 rotates clockwise, which drives the bevel gear two 221 to rotate through the bevel gear one 212, the bevel gear two 221 rotates clockwise, which drives the connecting frame 222 to move upward, the connecting frame 222 moves upward, which drives the two sliding rods 23 to slide in the top inner wall, the sliding rod 23 is extruded to deform the spring 231, the deformed spring 231 pushes the upper I-beam column 11 through the top fixed circular plate, the resistance of the upper I-beam column to slide downward can be matched with the actual situation with the change of the spring 231, not only can the support make corresponding adjustment according to the pressure change, prevent the upper I-beam column 11 from sliding downward excessively, ensure that the support has sustained and sufficient supporting force on the roof, effectively control the roof subsidence, maintain the stability of the roadway, but also can flexibly adjust the sliding resistance of the upper I-beam column 11 according to the specific geological conditions, better adapt to the pressure change under different geological conditions, expand the application range of the gob-side entry retaining technology in the complex geological area.

[0037] When the device is installed and used, the two support plates 32 are installed in the two slide rails 31 respectively, and are pushed to slide downward, so that the bottom of the support plate 32 can contact the ground, when the support plate 32 is installed, the two bolts 33 are inserted into the circular holes on the surface of the support plate 32, and the bolt 33 is rotated clockwise, and the bolt 33 moves towards the lower I-beam column 1, when the bolt 33 moves a certain distance, the outer surface of the bolt 33 close to the center of the lower I-beam column 1 is threadedly connected in the corresponding circular hole 34, so that the two support plates 32 can be fixed on the two sides of the lower I-beam column 1, not only can improve the anti-inclination ability of the support when subjected to lateral force, reduce the possibility of the support tilting or falling, ensure that the support structure remains stable in the complex underground environment, but also make the device can bear greater pressure without deformation or damage, prolong the service life of the support, and ensure the supporting effect.

[0038] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A collapsible along-vacant roadway support column, comprising a lower section I-beam column (1), a cut groove is formed at the top of the lower section I-beam column (1), an upper section I-beam column (11) is slidably connected to the inner wall of the cut groove, two U-shaped mounting sleeves (12) are jointly mounted on the outer surfaces of the upper section I-beam column (11) and the lower section I-beam column (1), characterized in that: The lower section I-shaped column (1) is internally provided with an adjusting assembly (2), and the left side and the right side of the lower section I-shaped column (1) are provided with supporting assemblies (3); The adjusting assembly (2) comprises a rotating shaft (21), the left side and the right side outer surfaces of the rotating shaft (21) are rotationally connected with the inner walls of the lower section I-shaped column (1), the left end of the rotating shaft (21) is fixedly connected with a rotating block (211), and the outer surface of the rotating block (211) is fixedly connected with a conical gear one (212).

2. A collapsible, gob-side entry retaining prop according to claim 1, characterised in that: The inner wall of the lower section I-shaped column (1) is rotationally connected with a threaded rod (22), the top of the threaded rod (22) is fixedly connected with a conical gear two (221), the left side top of the conical gear two (221) is meshedly connected with the right side bottom of the conical gear one (212), and the outer surface of the threaded rod (22) is threadedly connected with a connecting frame (222).

3. A yieldable, gob-side entry retaining prop according to claim 2, characterised in that: The top inner wall of the connecting frame (222) is slidably connected with two sliding rods (23), the top of each of the two sliding rods (23) is fixedly connected with a circular plate, and the top of each of the two circular plates is fixedly connected with the bottom of the upper section I-shaped column (11).

4. A yieldable, gob-side entry retaining prop according to claim 3, characterised in that: The outer surface of each of the two sliding rods (23) is sleeved with a spring (231), the top of each of the two springs (231) is fixedly connected with the bottom of the same side circular plate, and the bottom of each of the two springs (231) is fixedly connected with the top of the connecting frame (222).

5. A collapsible, gob-side entry retaining prop according to claim 1, characterised in that: The two supporting assemblies (3) are symmetrically arranged around the center of the lower section I-shaped column (1), the supporting assembly (3) comprises two sliding rails (31), and the end, close to the center of the lower section I-shaped column (1), of each of the two sliding rails (31) is fixedly connected with the outer surface of the lower section I-shaped column (1).

6. A collapsible, gob-side entry retaining prop according to claim 5, characterised in that: The inner walls of the two sliding rails (31) are commonly slidably connected with a supporting plate (32), the end, away from the lower section I-shaped column (1), of the supporting plate (32) is provided with two circular holes, and the inner walls of the two circular holes are threadedly connected with bolts (33).

7. A collapsible, gob-side entry retaining prop according to claim 6, characterised in that: The left end and the right end of the lower section I-shaped column (1) are provided with two circular holes (34), the inner walls of the two circular holes (34) are provided with threads, and the outer surfaces of the two bolts (33), close to the center of the lower section I-shaped column (1), are threadedly connected with the inner walls of the same side circular holes (34).

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