Return airway waste rock blocking support

Abstract

The utility model provides an air return way waste rock blocking supporting structure, and relates to the technical field of coal mine roadway supporting, the air return way waste rock blocking supporting structure comprises at least two stand columns, a plurality of inclined slots are uniformly formed in each stand column from top to bottom, the inclined slots of the same height in every two adjacent stand columns form a placing position, and a plurality of waste rock blocking assemblies are arranged between every two adjacent stand columns; the waste rock blocking assemblies correspond to the containing positions one to one, the waste rock blocking assemblies are inserted into the containing positions through the inclined inserting grooves, at the same height, in the two adjacent stand columns, the waste rock blocking assemblies comprise metal nets and frames, the metal nets are fixedly arranged on the frames, and the frames are inserted into the containing positions. Compared with the prior art, all the waste rock blocking assemblies are relatively independent, if part of the waste rock blocking assemblies are damaged, the waste rock blocking assemblies can be conveniently disassembled and replaced with new parts, the labor intensity of workers is effectively reduced, and the replacement efficiency of the metal net is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine roadway support, in particular to a gangue blocking support for a return airway. BACKGROUND

[0002] Top cutting and roadway leaving is a kind of roadway support technology for underground coal mining. Its core principle is to cut off the roof rock through directional pre-splitting blasting or hydraulic fracturing at the edge of the goaf, so that the roof of the goaf can collapse along the predetermined cut seam position, and at the same time, a special support structure is used to retain the roadway for the next working face return air or transportation.

[0003] In order to prevent gangue from falling into the roadway during roadway excavation or mining, and to ensure the normal ventilation of the roadway and the safety of personnel and equipment, a special support structure is needed in the return airway formed by top cutting and roadway leaving to control the deformation and displacement of the surrounding coal and rock, and to improve the stability of the roadway.

[0004] The existing gangue blocking support structure for the return airway uses a metal net for enclosure. After long-term use, the metal net will be damaged due to long-term friction and impact of the gangue and deformation of the roadway, eventually leading to the inability to normally contain the gangue. At this time, the metal net needs to be replaced after the gangue is cleaned. However, the existing metal net is often fixed on the U-shaped steel by multiple cable clamps. When replacing the metal net, the cable clamps need to be removed one by one, which not only increases the labor intensity of the workers, but also reduces the replacement efficiency of the metal net. SUMMARY

[0005] The purpose of the present application is to provide a gangue blocking support for a return airway, which can solve the technical problem of inconvenient replacement of the metal net in the existing gangue blocking support structure for the return airway.

[0006] The present application provides a gangue blocking support for a return airway, which includes at least two upright columns, a plurality of inclined slots are uniformly arranged on each upright column from top to bottom, the inclined slots at the same height on adjacent two upright columns form a placement position, a plurality of gangue blocking assemblies are arranged between adjacent two upright columns, the gangue blocking assemblies correspond to the placement positions one by one, and the gangue blocking assemblies are inserted into the placement positions through the inclined slots at the same height on adjacent two upright columns.

[0007] The gangue blocking assembly includes a metal net and a frame, the metal net is fixedly arranged on the frame, and the frame is inserted into the placement position.

[0008] Further, a plurality of blocking rods are fixedly arranged on the frame, and the blocking rods are located above the metal net.

[0009] Further, the inclination angle of the inclined slot is 30° to 60°.

[0010] Further, the frame portion is inserted into the placing position, a supporting assembly for supporting the outer portion of the frame is arranged between the two columns, the supporting assembly comprises a first supporting member inserted into the column and a plurality of second supporting members for supporting the metal net, and the second supporting members are uniformly arranged on the first supporting member.

[0011] Further, the first supporting member is provided with a positioning block, and the positioning block is in abutment with the column.

[0012] Further, the distance between the upper and lower adjacent two frames is 20-50 cm.

[0013] Further, the bottom of the column is provided with a fixing plate, the fixing plate is provided with a fixing hole, and the connection part of the column and the fixing plate is provided with a ribbed bar.

[0014] The utility model discloses the beneficial effects of:

[0015] The blocking and supporting assembly provided by the utility model cooperates with the column through the inclined slot, and can be directly inserted to complete installation, so that the operation is simple and easy to understand, and complex connecting procedures, professional equipment or a large number of bolt fastening operations are not needed, the underground support construction time is greatly saved, the construction efficiency is improved, the exposure time of workers in dangerous environment is reduced, compared with the prior art, the blocking and supporting assemblies are relatively independent, if part of the blocking and supporting assemblies are damaged, the new parts can be conveniently disassembled and replaced, the labor intensity of workers is effectively reduced, and the replacement efficiency of the metal net is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The structure schematic diagram of some embodiments of the present application is shown in the figure.

[0018] Figure 2 The structure schematic diagram of the column of some embodiments of the present application is shown in the figure.

[0019] Figure 3 The structure schematic diagram of the blocking and supporting assembly of some embodiments of the present application is shown in the figure.

[0020] Figure 4 The structure schematic diagram of the supporting assembly of some embodiments of the present application is shown in the figure.

[0021] The reference signs are respectively:

[0022] 1, column; 2, inclined slot; 3, gangue blocking assembly; 31, metal net; 32, frame; 4, blocking rod; 5, support assembly; 51, first support; 52, second support; 6, positioning block; 7, fixed plate; 71, fixed hole; 8, ribbed bar. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiments:

[0030] As shown in Figure 1 and Figure 2 The present application provides a return air lane gangue blocking support, which comprises at least two columns 1, a plurality of inclined slots 2 are uniformly provided on the column 1 from top to bottom, the inclined slots 2 at the same height on the adjacent two columns 1 form a placing position, a plurality of gangue blocking assemblies 3 are arranged between the adjacent two columns 1, the gangue blocking assemblies 3 correspond to the placing positions one by one, the gangue blocking assemblies 3 are inserted into the placing positions through the inclined slots 2 at the same height on the adjacent two columns 1, the gangue blocking assembly 3 comprises a metal net 31 and a frame 32, the metal net 31 is fixedly arranged on the frame 32, the frame 32 is inserted into the placing position, the gangue blocking assembly 3 is directly inserted and installed by cooperating with the column 1 through the inclined slot 2, the operation is simple and easy to understand, without complex connection process, professional equipment or a large number of bolt fastening operations, etc., greatly saving the underground support construction time, improving the construction efficiency, reducing the exposure time of workers in dangerous environment, compared with the prior art, each gangue blocking assembly 3 is relatively independent, if part of the gangue blocking assembly 3 is damaged, it can be conveniently disassembled and replaced with a new one, effectively reducing the labor intensity of the workers, improving the replacement efficiency of the metal net 31, the gangue blocking assembly 3 composed of the metal net 31 and the frame 32 has strength and toughness, the frame 32 gives rigid support to the overall structure, ensuring that the assembly is not easy to collapse when bearing the impact and extrusion of gangue, the fine pores of the metal net 31 effectively intercept the sliding and splashing of fine gangue, preventing the gangue from flowing into the roadway as a whole, and ensuring the safety of ventilation, pedestrian and equipment operation.

[0031] As shown in Figure 3As shown, a plurality of blocking rods 4 are fixed on the frame 32, and the blocking rods 4 are located above the metal net 31, which can block the larger gangue. In the actual return airway environment, the size of the gangue is different, and when the larger gangue rolls down, the blocking rod 4 can first withstand the impact. For example, in the process of coal mining, the roof collapse may produce gangue with a larger diameter, and the blocking rod 4 can prevent these large gangues from easily breaking through the metal net 31, thereby sharing part of the impact force for the metal net 31, thereby enhancing the comprehensive blocking ability of the entire gangue blocking assembly 3 to gangues of different sizes. The blocking rod 4 can effectively reduce the direct wear and damage of the metal net 31 by the gangue. In the case of continuous rolling or accumulation of gangue, the metal net 31 is easily torn by sharp gangue edges or damaged by heavy objects. The presence of the blocking rod 4 can change the trajectory and force point of the gangue, so that the gangue first contacts the blocking rod 4, reducing the probability of damage to the metal net 31 and prolonging the service life of the metal net 31.

[0032] As shown in Figure 1 and Figure 2 shown, the inclination angle of the inclined slot 2 is 30° to 60°. When the angle of the inclined slot 2 is 30° to 60°, the gangue blocking assembly 3 (including the metal net 31 and the frame 32) inserted therein will be subjected to an upward oblique support force. This support force can be decomposed into a vertical component and a horizontal component perpendicular to the gangue blocking assembly 3. The vertical component helps to resist the vertical downward pressure of the gangue, preventing the gangue blocking assembly 3 from sliding downward under the action of gravity and gangue pressure. The horizontal component can make the gangue blocking assembly 3 tightly fit in the slot, reducing its horizontal shaking, thereby making the gangue blocking assembly 3 more stable when impacted by the gangue. In the actual return airway, when the gangue rolls down from above and impacts the gangue blocking assembly 3, the slot with a suitable inclination angle can ensure that the gangue blocking assembly 3 remains in a fixed position and does not easily displace, providing reliable gangue blocking function for the return airway. The inclination angle of 30° to 60° facilitates the installation of the gangue blocking assembly 3. This angle range allows the worker to not need to completely vertically align the slot when inserting the gangue blocking assembly 3, leaving some operating margin. In the complex environment underground, the worker's operating space is limited, and this design reduces the installation difficulty and improves the work efficiency. At the same time, when the gangue blocking assembly 3 needs to be disassembled for maintenance or replacement, the inclination angle also facilitates the worker to use tools to pull it out. Compared with the vertical slot, the inclined slot 2 can provide an angle that is more conducive to pulling out the assembly, reducing the resistance in the disassembly process and making the maintenance work easier. Specifically, in this embodiment, the inclination angle of the inclined slot 2 is 45°.

[0033] As shown in Figure 1As shown, the frame 32 is partially inserted into the placement position, and the support assembly 5 for supporting the outer part of the frame 32 is arranged between the two upright columns 1. The support assembly 5 includes a first support 51 inserted into the upright column 1 and a plurality of second supports 52 for supporting the metal mesh 31. The second supports 52 are uniformly fixed to the first support 51. The frame 32 is partially inserted into the placement position, and the first support 51 on the upright column 1 can provide support for the outer part of the frame 32, thereby enhancing the stability of the frame 32 in the horizontal direction. In the return airway, the gangue blocking assembly 3 may be impacted by gangue from different directions, especially the horizontal impact force, which is easy to make the frame 32 sway or shift. The first support 51 can effectively resist this horizontal force, ensuring that the frame 32 is stably in the working position and maintaining the integrity of the entire gangue blocking support structure. The plurality of second supports 52 arranged on the first support 51 support the metal mesh 31, making the stress on the metal mesh 31 more uniform. When the metal mesh 31 blocks the gangue, the stress on each part of the metal mesh 31 may be different due to uneven distribution of the gangue. The presence of the second support 52 is like providing the metal mesh 31 with a plurality of uniformly distributed support points, dispersing the pressure of the gangue to each support point. This can prevent the metal mesh 31 from being concave or damaged due to excessive local stress, for example, in areas with more gangue accumulation, the metal mesh 31 can better withstand pressure under the support of the second support 52, avoiding damage due to local overload, thereby prolonging the service life of the metal mesh 31 and enhancing the gangue blocking effect. Specifically, two-thirds of the frame 32 is inserted into the placement position.

[0034] As shown in Figure 1 and Figure 4 , the first support 51 is fixed with a positioning block 6, which abuts against the upright column 1. The positioning block 6 can help workers accurately determine the insertion depth of the first support 51, ensuring that the installation position is accurate and consistent each time.

[0035] As shown in Figure 1 , the distance between the upper and lower adjacent two frames 32 is 20-50 cm. Within this range, the leakage of gangue from the gap between the upper and lower adjacent two frames 32 can be effectively prevented. If the distance is too large, the gangue may fall into the return airway through the gap under the action of gravity, affecting ventilation and pedestrian safety. If the distance is too small, the material cost and installation difficulty will increase. For example, in actual application, when the distance is kept within this range, smaller gangue particles can be effectively intercepted by the lower metal mesh 31, and larger gangue can be blocked by the frame 32 and the blocking rod 4, thereby forming an efficient gangue blocking protection. Specifically, in this embodiment, the distance between the upper and lower adjacent two frames 32 is 30 cm.

[0036] As shown in Figure 1 and Figure 2As shown, the bottom of the column 1 is fixed with a fixed plate 7, the fixed plate 7 is provided with a fixed hole 71, the connection part of the column 1 and the fixed plate 7 is provided with a ribbed bar 8, the existence of the fixed plate 7 provides a wider bottom support area for the column 1, in the return air lane, the column 1 needs to bear the gangue pressure transmitted from the gangue blocking assembly 3, the roof pressure and other various forces, through the fixed plate 7, the pressure of the column 1 is dispersed to a larger roadway bottom area, thereby reducing the pressure per unit area of the bottom of the column 1, reducing the possibility of the column 1 sinking into the roadway bottom or tilting, and the ribbed bar 8 can strengthen the strength of the connection part of the column 1 and the fixed plate 7, specifically, in actual use, first pour a foundation with equal height in the roadway, and then fix the column 1 on the foundation through the ground bolt passing through the fixed hole 71.

[0037] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gangue blocking support for a return airway, characterized in that: The application relates to a gangue blocking assembly, which comprises at least two vertical columns, a plurality of inclined slots are uniformly arranged on the vertical columns from top to bottom, the inclined slots at the same height on two adjacent vertical columns form a placing position, a plurality of gangue blocking assemblies are arranged between the two adjacent vertical columns, the gangue blocking assemblies correspond to the placing positions one by one, and the gangue blocking assemblies are inserted into the placing positions through the inclined slots at the same height on the two adjacent vertical columns. The gangue blocking assembly comprises a metal net and a frame, the metal net is fixed to the frame, and the frame is inserted into the placing position.

2. The return airway blocking and supporting device according to claim 1, characterized in that: A plurality of blocking rods are fixed to the frame and located above the metal net.

3. The return airway blocking and supporting device according to claim 1, characterized in that: The inclination angle of the inclined slot is 30-60 degrees.

4. The return airway blocking and supporting device according to claim 1, characterized in that: The frame is partially inserted into the placing position, a supporting assembly for supporting the outer part of the frame is arranged between the two vertical columns, the supporting assembly comprises a first supporting piece inserted into the vertical column and a plurality of second supporting pieces for supporting the metal net, and the second supporting pieces are uniformly fixed to the first supporting piece.

5. The return airway blocking and supporting device according to claim 4, characterized in that: A positioning block is fixed to the first supporting piece and abuts against the vertical column.

6. The return airway blocking and supporting device according to claim 1, characterized in that: The distance between the two adjacent frames is 20-50 cm.

7. The return airway blocking and supporting device according to claim 1, characterized in that: A fixing plate is fixed to the bottom of the vertical column, the fixing plate is provided with a fixing hole, and a ribbed rib is arranged at the connecting position of the vertical column and the fixing plate.

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