Test device for monitoring vertical compressive deformation of coal pillar

Abstract

The utility model relates to the technical field of coal pillar compressive deformation test, and discloses a test device for monitoring vertical compressive deformation of a coal pillar, which comprises a cabinet body and a test mechanism, one side of the cabinet body is opened, a glass window is hinged at the opening of the cabinet body, and a coal pillar sample is placed in the cabinet body. A plurality of displacement sensors are uniformly and circumferentially distributed on the outer wall of the coal pillar sample in the vertical direction, the top end of the coal pillar sample is connected with a testing mechanism, the testing mechanism comprises a pressure applying piece, an angle adjusting piece and a rotating piece, and the angle adjusting piece performs angle change adjustment on the top, in contact with the coal pillar sample, of the pressure applying piece. Under the cooperation of the pressure applying piece, the angle adjusting piece and the rotating piece, pressure applying adjustment can be carried out on the top of the coal pillar sample, pressure applying in different directions can be carried out on the coal pillar sample, and therefore specific data of the vertical compression deformation of the coal pillar sample can be obtained through the displacement variation of the displacement sensors.

Description

Technical Field

[0001] This utility model relates to the field of coal pillar compression deformation testing technology, and in particular to a testing device for monitoring the vertical compression deformation of coal pillars. Background Technology

[0002] Coal pillars are coal bodies that are temporarily or permanently left unmined during coal mining to ensure safe production. Their core function is to reduce rock strata movement, control surface subsidence, and isolate potential hazards (such as gas and water hazards) through physical support.

[0003] The vertical compression deformation of a coal pillar refers to the total amount of compression deformation that occurs when a coal pillar is subjected to pressure in the vertical direction (i.e., the direction of gravity or loading). It usually includes two parts: elastic deformation and plastic deformation.

[0004] In actual environments, the direction of forces acting on coal pillar structures is not constant. It is affected by changes in goaf water level, coal seam dip angle and hydraulic gradient, as well as geological structures, which cause changes in the direction of forces. Therefore, in order to obtain better experimental data on the vertical compression deformation of coal pillars, a test device for monitoring the vertical compression deformation of coal pillars is proposed to better simulate the environment of coal pillars under different conditions and obtain more experimental data. Utility Model Content

[0005] To address the technical problems mentioned in the background section, this utility model provides a test device for monitoring the vertical compression deformation of a coal pillar.

[0006] This utility model is achieved by the following technical solution: a test device for monitoring the vertical compression deformation of a coal pillar, including a cabinet and a testing mechanism.

[0007] The cabinet has an opening on one side, with a glass window hinged at the opening. A coal column sample is placed inside the cabinet. Several displacement sensors are evenly distributed circumferentially along the vertical direction on the outer wall of the coal column sample. A testing mechanism is connected to the top of the coal column sample.

[0008] The testing mechanism includes a pressure-applying component, an angle-adjusting component, and a rotating component. The angle-adjusting component adjusts the angle of the pressure-applying component at the top of the coal pillar sample, and the rotating component works in conjunction with the angle-adjusting component to achieve all-around pressure testing on the top of the coal pillar sample.

[0009] As a further improvement to the above solution, the pressure-applying component includes a hydraulic rod connected to the top of the inner wall of the cabinet. The hydraulic rod is positioned directly above the coal column sample. A rotating rod is fixedly connected to the bottom of the telescopic end of the hydraulic rod, and a pressure plate is connected to the bottom of the rotating rod.

[0010] As a further improvement to the above solution, the angle adjustment component includes a sleeve plate fixedly connected to the middle of the top of the pressure plate, and the sleeve plate is rotatably connected to the rotating rod.

[0011] As a further improvement to the above scheme, two sleeve plates are symmetrically fixedly connected to both sides of the pressure plate. Rotating rods are fixedly connected to the two sleeve plates. Sleeve plates are rotatably connected to the other ends of the two rotating rods. Hydraulic rods are fixedly connected to one side of sleeve plate 3. Sleeve plate 4 is fixedly connected to the other end of hydraulic rod 2. Rotating rods are fixedly connected to the four sides of sleeve plate 3. A positioning plate is rotatably connected to one side of rotating rod 3. The positioning plate is fixedly connected to the outer wall of the telescopic end of hydraulic rod 1.

[0012] As a further improvement to the above solution, the rotating component includes a hydraulic rod with an outer shell that is fixedly connected to it. The outer shell is rotatably connected to the inner wall of the top of the cabinet. The outer wall of the hydraulic rod has a spiral guide groove with one turn.

[0013] As a further improvement to the above solution, a hydraulic rod three is fixedly connected to the top of the cabinet. The telescopic end of the hydraulic rod three moves within the cabinet, and a base plate is fixedly connected to the bottom of the hydraulic rod three. A sliding rod is fixedly connected to one side of the base plate, and the outer end of the sliding rod is slidably connected to the guide groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes the cooperation of a pressure-applying component, an angle-adjusting component, and a rotating component to adjust the pressure applied to the top of a coal column sample. It can apply pressure to the coal column sample in different directions, thereby obtaining specific data on the vertical compression deformation of the coal column sample by utilizing the displacement changes of several displacement sensors. Attached Figure Description

[0016] Fig. 1 A schematic diagram of the overall structure of the test device for monitoring the vertical compression deformation of a coal column provided in Embodiment 1 of this utility model;

[0017] Fig. 2 This is a schematic diagram of the structure of the testing mechanism of this utility model;

[0018] Fig. 3 This is a schematic diagram of the angle adjustment component of this utility model.

[0019] Explanation of key symbols:

[0020] 1. Cabinet body; 2. Glass window; 3. Coal pillar sample; 4. Displacement sensor; 5. Hydraulic rod one; 6. Rotating rod one; 7. Sleeve one; 8. Pressure plate; 9. Sleeve two; 10. Rotating rod two; 11. Sleeve three; 12. Hydraulic rod two; 13. Sleeve four; 14. Rotating rod three; 15. Positioning plate; 16. Hydraulic rod three; 17. Base plate; 18. Sliding rod; 19. Guide groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example:

[0023] Please combine Figs. 1-3 The test device for monitoring the vertical compression deformation of coal pillars in this embodiment includes a cabinet 1 and a testing mechanism.

[0024] The cabinet 1 has an opening on one side, and a glass window 2 is hinged to the opening of the cabinet 1. A coal column sample 3 is placed inside the cabinet 1. Several displacement sensors 4 are evenly distributed in the vertical direction on the outer wall of the coal column sample 3. A testing mechanism is connected to the top of the coal column sample 3.

[0025] The testing mechanism includes a pressure-applying component, an angle-adjusting component, and a rotating component. The angle-adjusting component adjusts the angle of the pressure-applying component contacting the top of the coal pillar sample 3, and the rotating component works in conjunction with the angle-adjusting component to achieve all-round pressure testing on the top of the coal pillar sample 3.

[0026] The pressure-applying component includes a hydraulic rod 5 connected to the top of the inner wall of the cabinet 1. The hydraulic rod 5 is positioned directly above the coal pillar sample 3. A rotating rod 6 is fixedly connected to the bottom of the telescopic end of the hydraulic rod 5, and a pressure plate 8 is connected to the bottom of the rotating rod 6.

[0027] The angle adjustment component includes a sleeve plate 7 fixedly connected to the middle of the top of the pressure plate 8, and the sleeve plate 7 is rotatably connected to the rotating rod 6.

[0028] Two sleeve plates 2 9 are symmetrically fixedly connected to both sides of the pressure plate 8. Two rotating rods 2 10 are fixedly connected to the two sleeve plates 2 9. The other end of each of the two rotating rods 2 10 is rotatably connected to a sleeve plate 3 11. One side of the sleeve plate 3 11 is fixedly connected to a hydraulic rod 2 12. The other end of the hydraulic rod 2 12 is fixedly connected to a sleeve plate 4 13. The sleeve plate 4 13 is fixedly connected to a rotating rod 3 14. One side of the rotating rod 3 14 is rotatably connected to a positioning plate 15. The positioning plate 15 is fixedly connected to the outer wall of the telescopic end of the hydraulic rod 1 5.

[0029] The rotating component includes a housing that is fixedly connected to the hydraulic rod 5. The housing is rotatably connected to the inner wall of the top of the cabinet 1. The outer wall of the hydraulic rod 5 is provided with a spiral guide groove 19, which has one turn.

[0030] A hydraulic rod 16 is fixedly connected to the top of the cabinet 1. The telescopic end of the hydraulic rod 16 moves inside the cabinet 1. A base plate 17 is fixedly connected to the bottom end of the hydraulic rod 16. A sliding rod 18 is fixedly connected to one side of the base plate 17. The outer end of the sliding rod 18 is slidably connected to the guide groove 19.

[0031] The implementation principle of the test device for monitoring the vertical compression deformation of coal pillars in this embodiment is as follows:

[0032] After the coal pillar sample 3 is placed in the designated position, the glass window 2 is closed, and the hydraulic rod 5 drives the rotating rod 6 to drive the entire pressure plate 8 to apply pressure to the coal pillar sample 3, and the pressure is gradually and orderly increased.

[0033] During the pressure application operation, the extension and retraction of the two hydraulic rods 12 can cause the pressure plate 8 to tilt at an angle due to the rotational connection between the sleeve plate 7 and the rotating rod 6. Furthermore, the extension and retraction of the hydraulic rod 16 can cause the sliding rod 18 and the guide groove 19 to slide, thereby driving the entire hydraulic rod 5 and the tilted pressure plate 8 to rotate, thus enabling comprehensive pressure application to the coal pillar sample 3.

[0034] Then, by using multiple displacement sensors 4 deployed around the coal pillar sample 3 to measure the vertical displacement and the amount of outward elastic deformation of the coal pillar sample 3 under compression, a more comprehensive data on the amount of compression deformation can be obtained by summarizing the deformation data obtained from multiple displacement sensors 4.

[0035] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A test device for monitoring the vertical compression deformation of a coal pillar, characterized in that, include: The cabinet has an opening on one side, with a glass window hinged to the opening. A coal column sample is placed inside the cabinet. Several displacement sensors are evenly distributed circumferentially along the vertical direction on the outer wall of the coal column sample. A testing mechanism is connected to the top of the coal column sample. The testing mechanism includes a pressure-applying component, an angle-adjusting component, and a rotating component. The angle-adjusting component adjusts the angle of the pressure-applying component contacting the top of the coal pillar sample, and the rotating component works in conjunction with the angle-adjusting component to achieve all-around pressure testing on the top of the coal pillar sample.

2. The test device for monitoring the vertical compression deformation of a coal pillar as described in claim 1, characterized in that, The pressure-applying component includes a hydraulic rod connected to the top of the inner wall of the cabinet. The hydraulic rod is positioned directly above the coal column sample. A rotating rod is fixedly connected to the bottom end of the telescopic end of the hydraulic rod, and a pressure plate is connected to the bottom end of the rotating rod.

3. The test device for monitoring the vertical compression deformation of a coal pillar as described in claim 1, characterized in that, The angle adjustment component includes a sleeve plate fixedly connected to the middle of the top of the pressure plate, and the sleeve plate is rotatably connected to the rotating rod.

4. The test device for monitoring the vertical compression deformation of a coal pillar as described in claim 3, characterized in that, Two sleeve plates are symmetrically fixedly connected to both sides of the pressure plate. Two rotating rods are fixedly connected to the two sleeve plates. The other end of each rotating rod is rotatably connected to a sleeve plate. A hydraulic rod is fixedly connected to one side of the sleeve plate. A sleeve plate is fixedly connected to the other end of the hydraulic rod. A rotating rod is fixedly connected to the four sides of the sleeve plate. A positioning plate is rotatably connected to one side of the rotating rod. The positioning plate is fixedly connected to the outer wall of the telescopic end of the hydraulic rod.

5. The test device for monitoring the vertical compression deformation of a coal pillar as described in claim 1, characterized in that, The rotating component includes a hydraulic rod and an outer shell that are fixedly connected to it. The outer shell is rotatably connected to the inner wall of the top of the cabinet. A spiral guide groove is provided on the outer wall of the hydraulic rod, and the guide groove has one turn.

6. The test device for monitoring the vertical compression deformation of a coal pillar as described in claim 5, characterized in that, A hydraulic rod three is fixedly connected to the top of the cabinet. The telescopic end of the hydraulic rod three moves within the cabinet. A base plate is fixedly connected to the bottom end of the hydraulic rod three. A sliding rod is fixedly connected to one side of the base plate. The outer end of the sliding rod is slidably connected to the guide groove.

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