Temporary support pre-tightening structure for preventing coal mine tunneling top plate from sliding

Abstract

The utility model discloses an anti-slip temporary support pre-tightening structure for a coal mine tunneling roof, which relates to the technical field of coal mine equipment and comprises a roof body, a third fine steel rail is arranged in the middle of the bottom end of the roof body, a first fine steel rail is arranged on one side of the third fine steel rail, and a second fine steel rail is arranged on the other side of the first fine steel rail. A second refined steel rail is arranged on the other side of the third refined steel rail, side supporting structures are arranged on the two sides of the second refined steel rail and the first refined steel rail, a rail connecting cover is arranged at the upper end of the joint of the first refined steel rail, the second refined steel rail and the third refined steel rail in a clamping and covering mode, and a vertical supporting structure is arranged at the top end of the rail connecting cover; according to the anti-sliding temporary supporting pre-tightening structure for the coal mine tunneling roof, the side clamping needles move to the grids formed in the outer side of the roof body along with the flat compressed springs, so that the side clamping needles extend out along the grids formed in the outer side of the roof body and are nailed into the inner wall of a coal mine, and the position of the roof body can be fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine equipment, in particular to a temporary support pre-tightening structure for preventing the anti-slip and displacement of the roof in coal mine tunneling. Background Technique

[0002] The roof of coal mine tunneling refers to the rock or soil layer structure above the miners during the tunneling process in the mine. The safety management of this area is extremely important because the instability of the roof may lead to major safety accidents such as collapses and roof falls, threatening the lives of miners. The roof of coal mine tunneling has the characteristics of complex geological structure, changing stress distribution, and hydrogeological conditions. During the tunneling process, the roof may contain various geological structures, such as limestone, sandstone, coal seams, etc. The hardness and stability of these rocks are different. As the tunneling operation progresses, the roof will experience stress redistribution. Especially at the intersection of roadways or during multiple tunneling operations, stress concentration may cause roof instability. At the same time, the influence of groundwater is also an important factor in roof management. Water may soften the roof rock, making it more prone to collapse. To effectively manage the roof of coal mine tunneling, various measures can be taken, including using supports made of wood, metal, or concrete materials for roof support, regularly evaluating the stability of the roof through technical means such as acoustic wave detection and stress monitoring, professionally dealing with groundwater problems to reduce the impact of moisture on the roof, and trying to choose relatively stable sections when planning the tunneling route. In addition, it is also necessary to regularly conduct safety training for miners to improve their awareness of roof safety management and emergency handling capabilities. Common safety problems include roof collapses, bolt failures, and rock mass deformations. After discovering these problems, measures should be taken immediately, such as stopping the operation, organizing personnel to evacuate, and carrying out emergency support or reinforcement. The management of the roof of coal mine tunneling is an important part of mine safety. Through scientific and reasonable management measures, roof accidents can be effectively prevented and the lives of miners can be protected.

[0003] The application number is CN201920368158.2. This coal mine tunneling support device includes a coal mine tunneling machine. There is a fixed connection of an inclined support roof between the transmission screw sleeve blocks. The surface of the top of the inclined support roof is fixedly connected with a roller support mechanism at equal intervals. In the middle position of the top of the coal mine tunneling machine, there is a fixed connection of a fixed bearing. The inner axis of the fixed bearing is rotatably connected with a dust filter box. On the middle position of the top of the coal mine tunneling machine and on the left side of the dust filter box, there is a fixed connection of an air suction pump. The left end face of the inclined support roof is fixedly connected with an air suction port. One end of the air suction pump away from the dust filter box is communicated with a dust suction bellows, achieving the improvement of the safety during coal mine tunneling.

[0004] In the above - mentioned technology, components such as the inclined support roof plate and bearings are used in combination with the support structure to improve the safety of coal mine tunneling. However, when many temporary support devices are in use, it is impossible to ensure that the support device remains in place during long - term operation. Dislocation is very dangerous and extremely likely to pose a danger to coal mine tunneling operations.

[0005] Therefore, in view of this, in order to research and improve the existing deficiencies, a temporary support pre - tightening structure for preventing the roof from slipping during coal mine tunneling is proposed. Utility Model Content

[0006] The purpose of the present utility model is to provide a temporary support pre - tightening structure for preventing the roof from slipping during coal mine tunneling, so as to solve the problems raised in the above - mentioned background technology.

[0007] To achieve the above - mentioned purpose, the present utility model provides the following technical solution: A temporary support pre - tightening structure for preventing the roof from slipping during coal mine tunneling, comprising: a roof plate body. In the middle of the bottom end of the roof plate body, a third precision rail is provided. On one side of the third precision rail, a first precision rail is provided. On the other side of the third precision rail, a second precision rail is provided. Side support structures are provided on both sides of the second precision rail and the first precision rail.

[0008] At the upper end of the connection between the first precision rail, the second precision rail and the third precision rail, a connection rail cover is snap - covered. At the top end of the connection rail cover, a vertical support structure is provided.

[0009] Furthermore, a plurality of grids are opened on both sides and the top end of the roof plate body. The structure of the roof plate body is a three - fold structure, which is convenient for the roof plate body to better fit on the top of the coal mine.

[0010] Furthermore, the included angle between the side surface and the top end of the roof plate body is an obtuse angle, which is convenient for placing the first precision rail, the second precision rail and the third precision rail.

[0011] Furthermore, the first precision rail, the second precision rail, the third precision rail and the connection rail cover are assembled and connected in two ways, namely, screw insertion connection and snap - cover connection, which is convenient for connecting the first precision rail, the second precision rail, the third precision rail and the connection rail cover.

[0012] Furthermore, the side support structure includes a flat compression spring, side clamping pins, side grooves and counterweight blocks. Side grooves are opened on the side surfaces of the first precision rail and the second precision rail. At both ends inside the side grooves, side clamping pins are horizontally fixed. At the front end of the side clamping pins, counterweight blocks are welded. At the front surface of the counterweight blocks, side clamping pins are welded. An elastic connection is formed between the flat compression spring and the counterweight block, which is convenient for the flat compression spring to provide elastic force for the counterweight block.

[0013] Further, the relative length of the flat compression spring is one-third of the length of the side groove, which is convenient for the installation of the flat compression spring.

[0014] Further, the outer shape of the side pin is conical, and the maximum port diameter of the side pin is smaller than the width of the grid opened on both sides of the outer side of the top plate body, which is convenient for the side pin to pass through the outer side of the top plate body.

[0015] Further, the vertical support structure includes a straight pin and a positioning round shaft. The positioning round shaft is arranged at the top end of the connecting rail cover, and the straight pin is arranged at the top end of the positioning round shaft. The outer shape of the straight pin is conical, which is convenient for the straight pin to be nailed into the inner wall of the coal mine.

[0016] Further, the straight pin and the positioning round shaft are connected by welding to prevent the straight pin from shaking.

[0017] Further, the maximum port diameter of the outer side of the straight pin is smaller than the width of the grid opened at the top end of the top plate body, which is convenient for the straight pin to be nailed into the top of the coal mine.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. By pulling the counterweight block inside the side groove of the present utility model, the counterweight block drives the side pin to move. At the same time, the flat compression spring increases the restraint ability for the counterweight block. The side pin follows the flat compression spring to move to the grid opened on the outer side of the top plate body. In this way, the side pin extends along the grid opened on the outer side of the top plate body and is nailed into the inner wall of the coal mine, and the position of the top plate body will be fixed.

[0020] 2. The present utility model is fixed on the top end of the connecting rail cover through the positioning round shaft, and the straight pin extends upward inside the top end of the positioning round shaft. In this way, the straight pin is nailed into the top of the coal mine, and at this time, the connecting rail cover will clamp the first precision rail, the second precision rail and the third precision rail in a plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the lateral upward view structure of the present utility model;

[0022] Figure 2 It is a schematic diagram of the lateral downward view structure of the present utility model;

[0023] Figure 3 It is a schematic diagram of the exploded lateral upward view structure of the present utility model;

[0024] Figure 4 It is a schematic diagram of the exploded front view structure of the present utility model;

[0025] Figure 5 It is a schematic diagram of the front view of the external part structure of the present utility model;

[0026] Figure 6This is a schematic top - view structure diagram of the appearance part of the utility model;

[0027] Figure 7 This is a schematic front - view structure diagram of the connecting rail cover of the utility model;

[0028] Figure 8 This is a schematic bottom - view structure diagram of the connecting rail cover of the utility model.

[0029] In the figure: 1. Roof plate body; 2. First precision steel rail; 3. Second precision steel rail; 4. Third precision steel rail; 5. Side support structure; 51. Flat compression spring; 52. Side clamping pin; 53. Side groove; 54. Counterweight block; 6. Vertical support structure; 61. Straight pin; 62. Positioning round shaft; 7. Connecting rail cover. Specific implementation manner

[0030] 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.

[0031] As Figures 1 - 8 shown, a temporary support pre - tightening structure for preventing the roof from slipping during coal mine tunneling includes: a roof plate body 1. A third precision steel rail 4 is arranged at the middle of the bottom end of the roof plate body 1. A first precision steel rail 2 is arranged on one side of the third precision steel rail 4, a second precision steel rail 3 is arranged on the other side of the third precision steel rail 4, and side support structures 5 are arranged on both sides of the second precision steel rail 3 and the first precision steel rail 2;

[0032] At the upper end of the connection of the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4, a connecting rail cover 7 is clamped and covered. A vertical support structure 6 is arranged at the top end of the connecting rail cover 7.

[0033] As Figures 1 - 8 shown, a temporary support pre - tightening structure for preventing the roof from slipping during coal mine tunneling. The side support structure 5 includes a flat compression spring 51, a side clamping pin 52, a side groove 53 and a counterweight block 54. Side grooves 53 are opened on the sides of the first precision steel rail 2 and the second precision steel rail 3. At both ends inside the side grooves 53, side clamping pins 52 are horizontally fixed. At the front end of the side clamping pin 52, a counterweight block 54 is welded. At the front of the counterweight block 54, a side clamping pin 52 is welded. An elastic connection is formed between the flat compression spring 51 and the counterweight block 54:

[0034] For the rest, since the flat compression spring 51 increases the stretching and tensile force for the counterweight 54 and the side clamping pin 52, the side clamping pin 52 can pass through the top plate body 1 and be nailed into the inner wall of the coal mine. The staff can shorten the length of the flat compression spring 51 to increase the overall structure of multiple side support structures 5. Because the combined side clamping pins 52 of multiple side support structures 5 will increase the fixed area and force for the top plate body 1.

[0035] The following effects and novel technologies are brought:

[0036] By setting the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4 and combining them with the top plate body 1, a stable frame structure is formed, effectively preventing the sliding and collapse of the top plate body 1.

[0037] Flexible side support structure 5: The side support structure 5 composed of the flat compression spring 51, the side clamping pin 52, the side groove 53 and the counterweight 54 not only provides elastic support, but also further strengthens the fixed connection between the top plate body 1 and the inner wall of the coal mine through the pulling of the counterweight 54 and the nailing of the side clamping pin 52.

[0038] Simple adjustment and installation: The flat compression spring 51 is designed to be one-third of the length of the side groove 53, which is convenient for installation and length adjustment, enhancing the adaptability of the structure and the convenience of operation.

[0039] Optimized design of the side clamping pin 52: The conical side clamping pin 52 is designed with the maximum port diameter smaller than the grid width on the outside of the top plate body 1, which is convenient for the side clamping pin 52 to pass through the grid smoothly and be nailed into the inner wall of the coal mine to ensure the stable fixation of the top plate.

[0040] Elastic connection design: Through the elastic connection between the flat compression spring 51 and the counterweight 54, the side clamping pin 52 can freely expand and contract outside the top plate body 1, providing a more flexible and effective supporting force.

[0041] Combination of multiple steel rails: The combined design of the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4 not only enhances the supporting force of the top plate body 1, but also further improves the overall stability through the setting of the connecting rail cover 7 and the vertical support structure 6.

[0042] Grid extension fixation: The side clamping pin 52 extends out through the grid on the outside of the top plate body 1 and is nailed into the inner wall of the coal mine. This design not only ensures the stability of the top plate body 1, but also increases the fixed area and force.

[0043] Intelligent adjustment mechanism: The relative length design of the flat compression spring 51 and the pulling mechanism of the counterweight 54 enable the staff to adjust the supporting force and range according to actual needs, realizing intelligent support adjustment.

[0044] This temporary support pre-tightening structure for preventing the anti-slip of the roof in coal mine tunneling significantly improves the stability of the roof body 1, enhances the flexibility of support and the convenience of operation through its unique design and innovative technology, providing effective guarantee for the safety in the process of coal mine tunneling.

[0045] As Figures 1 - 8 shown, a temporary support pre-tightening structure for preventing the anti-slip of the roof in coal mine tunneling, the vertical support structure 6 includes a straight needle 61 and a positioning round shaft 62. The positioning round shaft 62 is arranged at the top end of the connecting rail cover 7, the straight needle 61 is arranged at the top end of the positioning round shaft 62, and the outer shape of the straight needle 61 is conical.

[0046] In addition, since the connecting rail cover 7 can connect the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4, and the positioning round shaft 62 and the straight needle 61 at the top end of the connecting rail cover 7 can help the roof body 1 to connect with the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4, the staff can increase or decrease the overall number of the vertical support structures 6 to determine the connection strength between the roof body 1 and the coal mine.

[0047] The following effects and novel technologies are brought:

[0048] Enhance the connection stability between the roof body 1 and the steel rail: Through the straight needle 61 and the positioning round shaft 62 in the vertical support structure 6, the roof body 1 can be effectively and tightly connected with the first precision steel rail 2, the second precision steel rail 3 and the third precision steel rail 4, preventing the roof body 1 from slipping and enhancing the stability of the overall structure.

[0049] Flexibly adjust the support strength: The staff can increase or decrease the number of the vertical support structures 6 according to actual needs, so as to flexibly adjust the connection strength between the roof body 1 and the coal mine and ensure the support effect under different geological conditions.

[0050] Ensure the firm connection: The straight needle 61 is fixed at the top end of the connecting rail cover 7 through the positioning round shaft 62. The outer shape of the straight needle 61 is conical, and the maximum port diameter is smaller than the grid width opened at the top end of the roof body 1, which is convenient for the straight needle 61 to be smoothly nailed into the top end of the coal mine to ensure the firm fixation of the roof body 1.

[0051] Prevent the straight needle 61 from shaking: The straight needle 61 and the positioning round shaft 62 are welded together to prevent the straight needle 61 from shaking during the working process, further enhancing the stability of the structure.

[0052] The combined design of the straight needle 61 and the positioning round shaft 62: The straight needle 61 is fixed at the top end of the connecting rail cover 7 through the positioning round shaft 62. This design not only simplifies the installation process, but also enhances the overall connection between the roof body 1 and multiple steel rails through the nailing of the straight needle 61, ensuring the stability of the structure.

[0053] Adjustable vertical support structure 6: The number of vertical support structures 6 can be adjusted as needed. This adjustable design enables the structure to adapt to different geological conditions and excavation requirements, thereby improving the flexibility and adaptability of the support.

[0054] Optimize the design of the straight needle 61: The straight needle 61 has a conical shape, and the maximum port diameter is smaller than the grid width opened at the top of the roof body 1. This design facilitates the straight needle 61 to be smoothly nailed into the top of the coal mine, ensuring a firm connection between the roof body 1 and the coal mine.

[0055] Stability of welding connection: The straight needle 61 and the positioning circular shaft 62 are connected by welding. This stable connection method prevents the straight needle 61 from shaking during operation and enhances the stability and durability of the overall structure.

[0056] Through the design of the vertical support structure 6, this temporary support pre-tightening structure for preventing the coal mine excavation roof from slipping not only enhances the connection stability between the roof body 1 and the multiple rails, but also provides the function of flexibly adjusting the support strength, thereby ensuring the stability of the roof under different geological conditions. It is an innovative and effective technical solution.

[0057] Working principle: When using the temporary support pre-tightening structure for preventing the top plate of a coal mine from slipping, first place the top plate body 1 in a suitable position, and at the same time, vertically nail the connecting rail cover 7 into the top of the coal block along the grid opened at the top of the top plate body 1. Then, place the first fine steel rail 2 flush with the second fine steel rail 3 and the third fine steel rail 4, and make the side grooves 53 opened on both sides of the first fine steel rail 2 and the second fine steel rail 3 aligned with the grids opened on both sides of the top plate body 1. The staff moves the flat compression spring 51 inside the side groove 53, and the flat compression spring 51 drives the counterweight block 54 and the side clamping pin 52 to telescopically move. When the counterweight block 54 moves to the designated grid position outside the top plate body 1, the counterweight block 54 passes through the grid outside the top plate body 1 and is nailed into the side of the coal block. In this way, the top plate body 1 as a whole will be fixed on the top of the coal block. This is the working principle of the temporary support pre-tightening structure for preventing the top plate of a coal mine from slipping.

[0058] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling, comprising: The top plate body (1), characterized in that a third precision rail (4) is provided at the middle of the bottom end of the top plate body (1), a first precision rail (2) is provided on one side of the third precision rail (4), a second precision rail (3) is provided on the other side of the third precision rail (4), and side support structures (5) are provided on both sides of the second precision rail (3) and the first precision rail (2); At the upper ends of the joints of the first precision rail (2), the second precision rail (3) and the third precision rail (4), a connecting rail cover (7) is clamped and provided, and a vertical support structure (6) is provided at the top end of the connecting rail cover (7).

2. The temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 1, wherein A plurality of grids are provided on both sides and the top end of the top plate body (1), and the structure of the top plate body (1) is a triple-fold structure.

3. The temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 1, characterized in that, The included angle between the side surface of the top plate body (1) and the top end of the top plate body (1) is an obtuse angle.

4. The temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 1, wherein The first precision rail (2), the second precision rail (3), the third precision rail (4) and the connecting rail cover (7) are assembled and connected by two methods, namely, screw insertion connection and clamping connection.

5. The temporary support pre-tightening structure for preventing the roof of a coal mine heading from slipping, as described in claim 1, is characterized in that The side support structure (5) includes a flat compression spring (51), a side clamping pin (52), a side groove (53) and a counterweight block (54). Side grooves (53) are provided on the side surfaces of the first precision rail (2) and the second precision rail (3). At both ends inside the side groove (53), side clamping pins (52) are horizontally fixed. A counterweight block (54) is welded to the front end of the side clamping pin (52). A side clamping pin (52) is welded to the front surface of the counterweight block (54). An elastic connection is formed between the flat compression spring (51) and the counterweight block (54).

6. The temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 5, characterized in that, The relative length of the flat compression spring (51) is one-third of the length of the side groove (53).

7. A temporary support pre-tightening structure for preventing the anti-skid displacement of the roof in coal mine tunneling according to claim 5, characterized in that The outer shape of the side clamping pin (52) is conical, and the maximum port diameter of the side clamping pin (52) is smaller than the width of the grids provided on both outer sides of the top plate body (1).

8. A temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 1, characterized in that, The vertical support structure (6) includes a straight pin (61) and a positioning round shaft (62). A positioning round shaft (62) is provided at the top end of the connecting rail cover (7). A straight pin (61) is provided at the top end of the positioning round shaft (62), and the outer shape of the straight pin (61) is conical.

9. The temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 8, characterized in that, The straight pin (61) and the positioning round shaft (62) are connected by welding.

10. A temporary support pre-tightening structure for preventing the roof from slipping during coal mine tunneling according to claim 8, characterized in that, The maximum port diameter outside the straight pin (61) is smaller than the width of the grids provided at the top end of the top plate body (1).

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