A protection and collection device for deep coal rock combination instability failure experiment

Abstract

This invention discloses a protective collection device for instability and failure experiments of deep coal-rock assemblages. It includes a press body, a collection hood slidably mounted on the output end of the press body, a collection plate fixedly mounted inside the collection hood, and a storage chamber located on the side wall of the collection hood, situated on one side of the collection plate. When the press body outputs power, the device collects the coal fragments that splash during the press body's crushing process. The collected coal fragments are then guided into the storage chamber by the built-in collection plate for easy retrieval and analysis. The device utilizes a spring, telescopic rod, drive column, and guide groove to separate the two collection hoods when the press is not crushing, allowing the operator to place the coal fragments to be tested on the support platform. During crushing, the hoods reassemble to prevent further splashing of coal fragments, thus providing both protection and collection.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mine testing equipment, and in particular relates to a protective collection device for testing the instability and failure of deep coal-rock composites. Background Technology

[0002] With the continuous development of society and the economy, the demand for energy is increasing daily. Currently, fuels such as oil and coal, buried deep underground, are still the most widely used. However, as mining intensity increases, shallow resources are gradually decreasing, and some mines have entered or are about to enter the deep mining stage. Furthermore, with the gradual increase in mining depth, engineering disasters are increasing daily, posing a significant threat to the safe and efficient mining of deep resources. Rock bursts and rock bursts, as major types of dynamic disasters, not only threaten the safety of workers and on-site equipment but also affect production progress.

[0003] Layered roof structures are the main structural form of roofs in coal mine roadways. Research on the stability of layered roofs mainly uses elastoplastic mechanics theory and numerical analysis methods, but it is still in the theoretical stage. Due to the extreme complexity and environmental uncertainty of current coal mine conditions, there are certain limitations to studying the stability of layered roofs in the field, and it is impossible to conduct accurate qualitative research.

[0004] The instability modes of layered roof structures are mainly classified into four categories: unstable roof, moderately unstable roof, easily unstable roof, and extremely easily unstable roof. Theoretical analysis has shown that the main factors affecting the roof instability mode include surrounding rock stress, thickness of each roof layer, physical and mechanical properties of each roof layer, size of roadway cross-section, and rock stratum dip angle. Currently, there is limited research on the degree of influence of each factor on roof stability and the classification of coal roadway roof stability based on these influencing factors.

[0005] Therefore, before deep excavation in coal mines, it is generally necessary to take samples for instability and destructive tests to obtain the strength of the roof of the layered coal seam underground in order to avoid safety accidents. An important part of the instability test is to collect and analyze the coal pieces that are scattered and splashed after being squeezed by the press. Existing experimental equipment lacks a device for collecting the splashed coal pieces. They are all picked up manually from the protective box of the equipment after the coal pieces are squeezed and burst. This is inefficient and may result in omissions, which seriously affects the accuracy of the experimental results.

[0006] Therefore, we need to design a protective collection device for experiments on the instability and failure of deep coal-rock assemblages to solve these problems. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a protective collection device for experiments on the instability and failure of deep coal and rock assemblages.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A protective collection device for an experiment on the instability and failure of a deep coal-rock composite includes a press body, a collection hood slidably disposed at the output end of the press body, a collection plate fixedly disposed inside the collection hood, and a storage chamber disposed on the side wall of the collection hood, with the storage chamber located on one side of the collection plate. When the output end of the press body outputs, the collection hood protects the output end of the press body and is used to collect the experimental material splashed after being squeezed by the press body.

[0010] Preferably, a hydraulic cylinder is fixedly mounted on the main body of the press, and a mounting plate is fixedly mounted on the output end of the hydraulic cylinder. There are two collection covers, which are symmetrically and slidably mounted on the mounting plate along the hydraulic cylinder. A pressure head is fixedly mounted on the bottom of the mounting plate, and a mounting platform is fixedly mounted below the pressure head. A support platform is detachably mounted on the mounting platform. When the hydraulic cylinder extends, the two collection covers will fit together and cover both the mounting plate and the mounting platform.

[0011] This setup allows for the use of a separate collection hood and mounting plate combined with the mounting platform to form a sealed space, enabling the collection of all the compressed and burst coal chunks and improving the accuracy of experimental results.

[0012] Preferably, a set of opposite sidewalls of the mounting plate are fixedly provided with drive columns, and a set of opposite inner walls of the collection hood are provided with guide grooves, with the free ends of the drive columns correspondingly disposed in the guide grooves. A mounting hole is provided on the sidewall of the mounting plate adjacent to the two drive columns, and a spring is provided in the mounting hole. A telescopic rod is also slidably inserted into the mounting tube. The end of the telescopic rod located in the mounting hole is connected to the spring, and a push rod is fixedly provided at the end of the telescopic rod located outside the mounting hole, and the push rod is always slidably attached to the inner wall of the collection hood.

[0013] This setup allows the collection hood to be moved horizontally by utilizing the difference in movement distance between the mounting plate and the collection hood, and to fit into the mounting plate and mounting platform to form a sealed space for collecting splashed coal.

[0014] Preferably, each of the inner walls of the collection hood has two guide grooves, and the two guide grooves are parallel to each other. The guide groove is formed by connecting a first slide groove and a second slide groove. The extension direction of the second slide groove is the same as the output direction of the hydraulic cylinder. The ends of the first slide groove and the second slide groove are connected, and their extension directions form an angle α with the extension direction of the second slide groove.

[0015] This design prevents the collection hood from tipping over by using two guide grooves, and the distance between the two collection hoods can be controlled by adjusting the angle between the first and second slide grooves.

[0016] Preferably, a limiting strip is fixedly provided on a set of opposite side walls of the mounting platform, and a limiting block is fixedly provided on the inner wall of the collection hood. When the two collection hoods are joined together, the limiting strip will be located above the limiting block.

[0017] This configuration, through the cooperation of the limiting strip and the limiting block, ensures that when the mounting plate moves upward, the drive column first moves along the second slide groove, then enters the first slide groove, and moves along the first slide groove again, so that the collection cover can be correctly reset.

[0018] Preferably, the press body is further provided with an operating table and a power distribution box, and the operating table is electrically connected to the power distribution box.

[0019] This setup allows the device to be powered.

[0020] Preferably, a protective box is also provided on the main body of the press, the protective box is made of plexiglass, and several support legs are also provided at the bottom of the main body of the press.

[0021] This setup ensures that the equipment is installed securely and with good safety.

[0022] The beneficial effects of this invention are as follows:

[0023] This invention uses two cooperating collection hoods to collect the splashed coal pieces when the press body crushes the coal. The collected coal pieces are then guided into a storage bin by a built-in collection plate for easy retrieval and analysis by staff. The two collection hoods can be separated when the press is not crushing, allowing staff to place the coal pieces to be tested on the support platform. During crushing, the two hoods can be joined together to prevent the coal pieces from splashing after crushing, thus providing a dual function of protection and collection.

[0024] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure from the main view direction of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal mechanism of the collection hood of the present invention;

[0029] Figure 4 for Figure 3 Enlarged view of the structure at point A in the image;

[0030] Figure 5 for Figure 3 Enlarged view of the structure at point B in the image;

[0031] Figure 6 for Figure 3 Enlarged view of the structure at point C.

[0032] Reference numerals in the attached drawings: 1-Main body of the press; 2-Electrical distribution box; 3-Protective box; 4-Operating table; 5-Mounting platform; 6-Bearing platform; 7-Mounting groove; 8-Limiting strip; 9-Mounting plate; 10-Pressure head; 11-Collection cover; 12-Guide groove; 121-First slide groove; 122-Second slide groove; 13-Mounting hole; 14-Push rod; 15-Telescopic rod; 16-Spring; 17-Limiting block; 18-Collection plate; 19-Storage compartment; 20-Drive column; 21-Limiting rod; 22-Support leg; 23-Hydraulic cylinder. Detailed Implementation

[0033] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Please see Figures 1-6 This is a protective collection device for experiments on the instability and failure of deep coal and rock assemblages. It includes a press body 1, a collection cover 11 slidably disposed at the output end of the press body 1, a collection plate 18 fixedly disposed inside the collection cover 11, and a storage chamber 19 disposed on the side wall of the collection cover 11, with the storage chamber 19 located on one side of the collection plate 18. When the output end of the press body 1 outputs, the collection cover 11 protects the output end of the press body 1 and is used to collect the experimental materials splashed after being squeezed by the press body 1.

[0037] Specifically, a hydraulic cylinder 23 is fixedly installed on the main body 1 of the press. A mounting plate 9 is fixedly installed at the output end of the hydraulic cylinder 23. There are two collection covers 11, which are symmetrically and slidably installed on the mounting plate 9 along the hydraulic cylinder 23. A pressure head 10 is fixedly installed at the bottom of the mounting plate 9. A mounting platform 5 is fixedly installed below the pressure head 10. A bearing platform 6 is detachably installed on the mounting platform 5. When the hydraulic cylinder 23 extends, the two collection covers 11 will fit together and cover the mounting plate 9 and the mounting platform 5. This arrangement can use another collection cover 11 and the mounting plate 9 and the mounting platform 5 to form a sealed space, which can collect all the crushed coal pieces and improve the accuracy of the experimental results.

[0038] Specifically, a set of driving columns 20 are fixedly installed on a set of opposite side walls of the mounting plate 9, and a set of guide grooves 12 are opened on a set of opposite inner walls of the collection hood 11. The free ends of the driving columns 20 are correspondingly placed in the guide grooves 12. A mounting hole 13 is opened on the side wall of the mounting plate 9 adjacent to the two driving columns 20. A spring 16 is installed in the mounting hole 13, and a telescopic rod 15 is slidably inserted into the mounting tube. The end of the telescopic rod 15 located in the mounting hole 13 is connected to the spring 16. A push rod 14 is fixedly installed at the end of the telescopic rod 15 located outside the mounting hole 13. The push rod 14 is always slidably attached to the inner wall of the collection hood 11. This arrangement can use the difference in the moving distance between the mounting plate 9 and the collection hood 11 to make the collection hood 11 move horizontally and fit with the mounting plate 9 and the mounting platform 5 to form a sealed space for collecting the splashed coal pieces.

[0039] Specifically, each collection cover 11 has two guide grooves 12 on its inner wall, and the two guide grooves 12 are parallel to each other. The guide groove 12 is formed by connecting the first slide groove 121 and the second slide groove 122. The extension direction of the second slide groove 122 is the same as the output direction of the hydraulic cylinder 23. The ends of the first slide groove 121 and the second slide groove 122 are connected, and the extension direction of the first slide groove 121 and the extension direction of the second slide groove 122 form an angle α. This arrangement can prevent the collection cover 11 from flipping over by using two guide grooves 12. The distance between the two collection covers 11 can be controlled by adjusting the angle between the first slide groove 121 and the second slide groove 122.

[0040] Specifically, a limiting strip 8 is fixedly installed on a set of opposite side walls of the mounting platform 5, and a limiting block 17 is fixedly installed on the inner wall of the collection cover 11. When the two collection covers 11 are joined together, the limiting strip 8 will be located above the limiting block 17. This arrangement, through the cooperation of the limiting strip 8 and the limiting block 17, ensures that when the mounting plate 9 moves upward, the drive column 20 first moves along the second slide groove 122, then enters the first slide groove 121, and moves along the first slide groove 121 again, so that the collection cover 11 can be correctly reset.

[0041] Specifically, the main body 1 of the press is also equipped with an operating table 4 and a power distribution box 2. The operating table 4 is electrically connected to the power distribution box 2, which enables the equipment to be powered.

[0042] Specifically, a protective box 3 is also provided on the main body 1 of the press. The protective box 3 is made of plexiglass. Several support feet 22 are also provided at the bottom of the main body 1 of the press. This arrangement can ensure that the equipment is installed securely and has good safety.

[0043] The working process of this embodiment is as follows: Before use, confirm that the equipment is in the reset state. In the reset state, the hydraulic cylinder 23 on the press body 1 retracts, and the collection cover 11 is separated from each other and located above the support platform 6. When using, the operator places the coal block to be tested on the support platform 6, and then closes the protective box 3 door on the press body 1. Then, the operator starts the equipment through the operating panel 4, causing the hydraulic cylinder 23 to extend. When the hydraulic cylinder 23 extends, it will push the mounting plate 9 closer to the support platform 6. During the process of the mounting plate 9 approaching the support platform 6, the limit rod 21 will fix the mounting plate 9 to prevent the mounting plate 9 from rotating or shifting. As the hydraulic cylinder 23 continues to extend, the mounting plate 9 will be continuously pushed closer to the support platform 6. During the process of the mounting plate 9 approaching the support platform 6, the bottom of the collection cover 11 will first contact the press body 1. When the hydraulic cylinder 23 pushes the collection cover 11 to stop moving, the mounting plate 9 will continue to move under the push of the hydraulic cylinder 23. At this time, the drive column 20 will start to slide along the guide groove 12. Before sliding, the drive column 20 is located in the first slide groove 121. When the drive column 20 slides along the first slide groove 121, it will drive the two collection covers 11 to move relative to each other. After the drive column 20 slides from the first slide groove 121 to the second slide groove 122, the two collection covers 11 will also contact and stick to each other. At the same time, the limit block 17 will slide to the bottom of the limit strip 8. While the drive column 20 slides along the first slide groove 121, the collection cover 11 will also push the telescopic column into the mounting hole 13 through the push rod 14, so that the spring 16 is compressed by the telescopic column. The two guide grooves 12 in the collection cover 11 can prevent the collection cover 11 from flipping.After the two collection covers 11 are joined together, the mounting plate 9 continues to move under the push of the hydraulic cylinder 23. The pressure head 10 on the mounting plate 9 will contact the coal block on the support platform 6, and as the hydraulic cylinder 23 continues to extend, it will squeeze and burst the coal block. The burst coal block will scatter and fly everywhere. When the flying coal block collides with the inner wall of the collection cover 11, it will be blocked and fall onto the collection plate 18. It will then fall into the storage bin 19 under the guidance of the collection plate 18, making it easy for the staff to retrieve. After the coal block is squeezed, the hydraulic cylinder 23 will shorten, driving the mounting plate 9 to move upward. During the upward movement of the mounting plate 9, the spring 16 pushes the push rod 14 to contact the inner wall of the collection cover 11. Therefore, under the action of friction, the collection cover 11 will move upward together with the mounting plate 9. The limiting block 17 on the collection cover 11 will contact the limiting strip. 8. Contact restricts the collection cover 11 to prevent it from moving upwards along with the mounting plate 9. At this time, the drive column 20 slides along the second slide groove 122. After the drive column 20 slides into the first slide groove 121 along the second slide groove 122, the spring 16 begins to extend, pushing the telescopic column out of the mounting hole 13 and pushing the push rod 14 to move, causing the push rod 14 to push the collection cover 11 back to its original position. After the push rod 14 pushes the collection cover 11 to its limit position, the limit block 17 also moves out from under the limit bar 8. At this time, the drive column 20 also moves to the top of the first slide groove 121 and moves upwards along with the continuous upward movement of the mounting plate 9, making it convenient for workers to clean up the crushed coal pieces on the support platform 6. At the same time, workers can remove the storage bin 19 installed on the collection cover 11 to analyze the collected splashed coal pieces.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A protective collection device for instability and failure experiments of deep coal-rock composites, comprising a press body (1), characterized in that: A collection cover (11) is slidably provided at the output end of the press body (1), and a collection plate (18) is fixedly provided inside the collection cover (11). A storage chamber (19) is also provided on the side wall of the collection cover (11), and the storage chamber (19) is located on one side of the collection plate (18). When the output end of the press body (1) outputs, the collection cover (11) will protect the output end of the press body (1) and is used to collect the experimental materials splashed after the press body (1) is squeezed. A hydraulic cylinder (23) is fixedly installed on the main body (1) of the press. A mounting plate (9) is fixedly installed on the output end of the hydraulic cylinder (23). There are two collection covers (11). The two collection covers (11) are symmetrically and slidably installed on the mounting plate (9) along the hydraulic cylinder (23). A pressure head (10) is fixedly installed at the bottom of the mounting plate (9). A mounting platform (5) is fixedly installed below the pressure head (10). A bearing platform (6) is detachably installed on the mounting platform (5). A set of opposing sidewalls of the mounting plate (9) are fixedly provided with drive columns (20), and a set of opposing inner walls of the collection cover (11) are provided with guide grooves (12). The free ends of the drive columns (20) are correspondingly provided in the guide grooves (12). A mounting hole (13) is provided on the sidewall of the mounting plate (9) adjacent to the two drive columns (20). A spring (16) is provided in the mounting hole (13). A telescopic rod (15) is also slidably inserted in the mounting hole. The end of the telescopic rod (15) located in the mounting hole (13) is connected to the spring (16). A push rod (14) is fixedly provided on the end of the telescopic rod (15) located outside the mounting hole (13). The push rod (14) is always slidably attached to the inner wall of the collection cover (11). The guide groove (12) is formed by connecting the first slide groove (121) and the second slide groove (122). The extension direction of the second slide groove (122) is the same as the output direction of the hydraulic cylinder (23). The ends of the first slide groove (121) and the second slide groove (122) are connected, and the extension direction of the first slide groove (121) is at an angle α with the extension direction of the second slide groove (122). By adjusting the angle α between the first slide groove (121) and the second slide groove (122), after the drive column (20) slides from the first slide groove (121) to the second slide groove (122), the two collection covers (11) will come into contact and fit together. Limiting strips (8) are fixedly installed on a set of opposite side walls of the mounting platform (5), and limiting blocks (17) are fixedly installed on the inner wall of the collection cover (11). When the two collection covers (11) are joined together, the limiting strips (8) will be located above the limiting blocks (17); while the limiting blocks (17) on the collection cover (11) will contact the limiting strips (8) to restrict the collection cover (11).

2. The protective collection device for instability and failure experiments of deep coal-rock composites according to claim 1, characterized in that: The number of guide grooves (12) on the inner wall of each collection cover (11) is two, and the two guide grooves (12) are parallel to each other.

3. The protective collection device for instability and failure experiments of deep coal-rock composites according to claim 1, characterized in that: A protective box (3) is also provided on the main body (1) of the press. The protective box (3) is made of plexiglass. Several support legs (22) are also provided at the bottom of the main body (1) of the press.

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