Ultra-deep tunnel coal seam parameter in-situ testing device

Abstract

The invention relates to the field of coal seams, in particular to an ultra-deep tunnel coal seam parameter in-situ testing device which comprises an outer cylinder. The plurality of test parts are arranged in the outer cylinder, each test part comprises a fixed block fixed in the outer cylinder, and a bottom hole is formed in the lower end surface of each fixed block; the moving block is in sliding connection with the bottom hole, the side portion of the moving block is provided with an extending end, and the moving block is provided with at least one through hole penetrating through the side surface of the moving block; the first spring is fixedly connected with the extending end; the pressure sensor is arranged at the bottom of the bottom hole; the push rod is in sliding connection with the through hole; the first drill is fixed at one end of the push rod; the driving part is used for driving the push rod to slide along the through hole; and the rotating part is used for driving the push rod to rotate when the push rod slides along the through hole. Through the pressure change, the influence of different depths in the overlying strata in the continuous tunneling process of the working face of the tunnel coal seam can be continuously reflected.

Description

Technical Field

[0001] The invention relates to the field of coal seams, and in particular to an in-situ testing device for coal seam parameters in an ultra-deep buried tunnel. Background Art

[0002] In ultra-deep tunnel coal seams, as the working face continues to advance, the damage to the overlying rock strata will become more and more serious. The impact range will gradually move upward and may affect the surface, thereby causing a series of environmental and safety problems. Since this impact process is a slow process, during the mining of such coal seams, it is necessary to always pay attention to the changes in different rock strata in the overlying rock strata in order to evaluate the impact on the overlying rock strata during the continuous mining and excavation of the tunnel rock strata.

[0003] For example, in the patent with application number CN2024104547374 and patent name "In-situ testing method of rock deformation angle based on internal deformation of full-stratum overburden", a vertical monitoring borehole is arranged on the ground above the mined coal seam, and the borehole depth is until the bottom plate of the coal seam includes the full-stratum overburden. A distributed optical cable for monitoring the deformation of the overburden is arranged inside the borehole. After the coal seam is mined, the optical cable inside the monitoring borehole will be deformed until it breaks due to the influence of mining. The deformation and breaking height of rock layers (key layers) at different levels and the relative distance between the working face and the borehole at the time of breaking can be obtained through monitoring. The deformation angle of each rock layer (key layer) inside the full-stratum overburden can be obtained by calculation. Although the information of the key layer can be obtained through the above-mentioned in-situ testing method, after the distributed optical cable breaks, it is impossible to judge whether the subsequent mining will continue to have an impact on the rock layer where the distributed optical cable breaks. Therefore, it is necessary to design a device that can be continuously tested in situ to solve the above-mentioned technical problems. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose an in-situ testing device for coal seam parameters in ultra-deep tunnels to solve the technical problem in the prior art that it is difficult to conduct continuous testing of the overlying rock strata of the working face during the mining process of coal seams in ultra-deep tunnels.

[0005] Based on the above purpose, the present invention provides an in-situ testing device for coal seam parameters in an ultra-deep buried tunnel, comprising an outer cylinder for inserting into a monitoring borehole, the device also comprising a plurality of testing components distributed along the axial direction of the outer cylinder, the testing components comprising:

[0006] A fixed block fixed in the outer cylinder, wherein a bottom hole is provided on the lower end surface of the fixed block;

[0007] A moving block slidably connected to the bottom hole, wherein the side of the moving block is provided with an extension end, and the moving block is provided with at least one through hole penetrating through its side surface;

[0008] A first spring having one end fixedly connected to the extension end and a pressure sensor disposed at the bottom of the bottom hole, wherein the other end of the first spring is fixedly connected to the force-bearing end of the pressure sensor;

[0009] A push rod slidably connected to the through hole;

[0010] A first drill bit is fixed to one end of the push rod, and a side wall hole corresponding to the first drill bit is provided on the side surface of the outer cylinder, and the length and height of the side wall hole are both greater than the diameter of the push rod;

[0011] A driving part for driving the push rod to slide along the through hole;

[0012] The rotating part is used to drive the push rod to rotate when the push rod slides along the through hole.

[0013] Furthermore, the driving unit includes:

[0014] A first motor is arranged outside the moving block and a gear is arranged on the output shaft of the first motor, a wheel cavity is arranged inside the moving block, the wheel cavity is communicated with the through hole, and the gear is located in the wheel cavity;

[0015] A sleeve and a spur rack embedded in the outer side of the sleeve, a collar groove is provided on the outer side of the push rod, the sleeve is sleeved on the collar groove, and the sleeve and the collar groove are rotatably connected, and the spur rack is meshed with the gear;

[0016] A linkage block is fixed to the inner wall of the through hole, the outer diameter of the sleeve is equal to the diameter of the push rod, and the linkage block is slidably connected to an outer sliding groove arranged on the outer side of the sleeve.

[0017] Furthermore, in the test component, two push rods are provided, the two push rods are located on different sides of the gear, and the two first drill bits are located on opposite sides of the moving block.

[0018] Furthermore, the first drill bit is a hollow drill bit, an inner hole is provided inside the push rod, and the inner hole passes through the end surface of the push rod close to the first drill bit, and the test component further includes:

[0019] An auxiliary rod slidably connected to the inner hole and a second drill bit disposed at one end of the auxiliary rod;

[0020] A fixing and separating portion for fixing or separating the auxiliary rod and the side wall of the inner hole when the second drill bit is completely located outside the inner hole;

[0021] A pulling portion for pulling the auxiliary rod to move toward the inner hole when the auxiliary rod and the side wall of the inner hole are separated from each other;

[0022] Guard plates are arranged opposite to each other, and an activity area is formed between the guard plates;

[0023] A guide plate slidably connected to a guide groove provided on the inner side of the guard plate, wherein a limiting hole is provided on the guide plate;

[0024] The device also includes:

[0025] A mud barrel for being inserted into each of the active areas, wherein the side surface of the mud barrel is provided with a socket corresponding to the inlet one by one, the socket is communicated with the inside of the mud barrel, the top opening of the mud barrel is communicated with the slurry outlet of the grouting machine during grouting, and the bottom opening of the mud barrel is sealed;

[0026] A support plate is arranged on the side surface of the mud tube, the support plate corresponds to the guide plate one by one, a limit rod is arranged under the support plate, and after the mud tube enters the active area, the limit rod enters into the limit hole;

[0027] A driving member for driving the guide plate to slide along the guide groove, so that the socket finally enters the inlet when the mud barrel moves toward the push rod;

[0028] The side surface of the auxiliary rod is provided with a guide ring groove and a plurality of slurry guide grooves connected to the guide ring groove. The outlet of the slurry guide groove is located at the end face of the auxiliary rod where the second drill bit is located, and there is an outlet of the slurry guide groove between adjacent blades of the second drill bit. After the socket enters the inlet, the socket is connected to the guide ring groove.

[0029] Furthermore, the fixed separation part includes:

[0030] A positioning block slidably connected to a movable hole provided on the side wall of the inner hole, the auxiliary rod is a polygonal prism, the inner hole matches the auxiliary rod, and the side surface of the auxiliary rod is provided with positioning holes corresponding to the positioning block one by one;

[0031] The electromagnet arranged on the top of the movable hole and the permanent magnet arranged in the positioning block, wherein the electromagnet is directly opposite to the permanent magnet, are used to generate mutually repelling or attracting forces.

[0032] Furthermore, the pulling portion includes:

[0033] a second motor disposed on the moving block and a reel disposed on an output shaft of the second motor;

[0034] A first guide wheel is arranged at the end of the push rod, wherein the first guide wheel and the first drill bit are located at two different ends of the push rod; a rope hole connected to the inner hole is arranged at the end surface of the push rod near the first guide wheel;

[0035] A second guide wheel is provided on the moving block, wherein the second guide wheel corresponds to the first guide wheel one by one;

[0036] A pull rope is fixedly connected to the bottom of the auxiliary rod at one end, the pull rope passes through the rope hole, and the other end of the pull rope is fixed in the rope groove of the reel, and the pull rope passes around the first guide wheel and the second guide wheel.

[0037] Furthermore, the driving member is an airbag connecting the end of the guide plate and the inner wall of the outer tube. In different test components, the airbag is connected through an inflation tube. After the outer tube is inserted into the monitoring borehole, the inflation tube is connected to the inflation port of the inflation pump.

[0038] Furthermore, the test component also includes a sealing plate arranged on the socket, which is used to be attached to the side surface of the push rod after the socket enters into the inlet.

[0039] Furthermore, the testing component also includes:

[0040] A side plate and an insert plate arranged on the top of the side plate, the insert plate is slidably connected to a slot arranged on the top wall of the side wall hole, a bottom groove is arranged at the bottom of the insert plate, a cylindrical hole is arranged on the side plate, and the push rod is rotatably connected to the cylindrical hole;

[0041] An extension plate and an outer moving plate with a top groove on the top, an inner groove is provided on the inner side of the outer moving plate, and the outer moving plate is slidably connected to the bottom groove, the extension plate is arranged on the top of the bottom groove, and the extension plate is slidably connected to the top groove;

[0042] An inner plate slidably connected to the inner groove, wherein the side surface of the inner plate facing the inner cylinder is flush with the inner side surface of the outer moving plate;

[0043] a second spring having one end fixedly connected to the top of the inner groove, and the other end of the second spring fixed to the top of the inner plate;

[0044] An inner extension plate provided on the inner wall of the outer cylinder and a third spring having one end fixedly connected to one side of the inner extension plate, and the other end of the third spring fixed to the inner side surface of the outer extension plate;

[0045] A straight rod with one end rotatably connected to a circular groove provided on the outer side of the push rod, a groove is provided on the side of the moving block facing the corresponding first drill bit, and the straight rod matches the groove so as to be received by the groove;

[0046] The side surface of the bottom rod is fixedly connected to the other end of the straight rod, and the side wall of the groove is provided with a guide hole. The bottom rod is divided into a guide rod and a supporting rod by the straight rod. The guide rod is slidably connected to the guide hole, and the supporting rod is used to push the outer moving plate after contacting the inner side surface of the outer moving plate.

[0047] Furthermore, the rotating part includes:

[0048] A worm wheel is provided with a center hole and an inner block is provided on the inner wall of the center hole, the push rod passes through the center hole, and the inner block is slidably connected with a surface slide groove provided on the side surface of the push rod;

[0049] A rotating ring disposed on the end surface of the worm wheel, the rotating ring being rotatably connected to a rotating groove disposed on the inner side surface of the side plate;

[0050] A worm meshing with the worm wheel, wherein the worm is connected to the side plate via a first bearing, and both ends of the worm are provided with a polygonal rod;

[0051] The device also includes:

[0052] A power rod connected to the inner wall of the outer cylinder via a second bearing, wherein the power rod is disposed between adjacent worms in adjacent test components, and first polygonal holes are disposed on both end surfaces of the power rod, and the polygonal rod is slidably connected to the corresponding first polygonal holes;

[0053] A third motor corresponding one-to-one to the push rods in the test component, wherein the third motor is fixed to the top of the outer cylinder;

[0054] A driving shaft having one end fixedly connected to the output shaft of the third motor, wherein the bottom end surface of the driving shaft is provided with a second polygonal hole, and the second polygonal hole matches the polygonal rod; in the uppermost test component, the polygonal rod located above is slidably connected to the corresponding second polygonal hole.

[0055] Beneficial effects of the present invention: When using the in-situ testing device for coal seam parameters in an ultra-deep tunnel of the present invention, it is first necessary to select an appropriate position above the unmined coal seam, and use a drilling rig to drill downward in the vertical direction until it reaches the middle position above the expected mining working surface to form a monitoring borehole. After completion, the outer cylinder is placed in the monitoring borehole, and a part of the outer cylinder extends to the outside of the monitoring borehole and is fixed to the ground surface by a fixing frame. At this time, the first drill bit is close to the outer side surface of the outer cylinder. Then, the driving unit drives the push rod to make the first drill bit move toward the hole wall of the monitoring borehole, and at the same time, the rotating unit drives the push rod to move the first drill bit toward the hole wall of the monitoring borehole. The rod rotates, passes through the first drill bit, and finally forms a hole on the wall of the monitoring borehole. When the depth of the hole is appropriate, part of the push rod remains in the through hole and the other part remains in the hole. After the coal seam is mined, as the relative distance between the monitoring borehole and the working face changes, the mining movement of the overlying strata on the push rod in the test components at different depths will also change continuously. This change in mining movement will cause a pressure change in the pressure sensor through the push rod. Through this pressure change, it can be continuously reflected that in the process of continuous excavation of the working face of the tunnel coal seam, the impact of different depths in the overlying strata is BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 It is a schematic diagram of placing the in-situ testing device in the present invention in a monitoring borehole;

[0058] Figure 2 It is an axonometric diagram of the local in-situ testing device of the present invention;

[0059] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0060] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0061] Figure 5 It is a schematic diagram of the in-situ testing device of the present invention with a partial outer cylinder removed;

[0062] Figure 6 The interior of a single outer cylinder in the present invention is schematically shown Figure 1 ;

[0063] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0064] Figure 8 for Figure 6 D-direction view;

[0065] Fig. 9 It is a partial cross-sectional view of the outer cylinder and the push rod in the present invention;

[0066] Fig.10 It is a schematic diagram of the connection between the worm and the power rod in the present invention;

[0067] Fig.11 The interior of a single outer cylinder in the present invention is schematically shown Figure 2 ;

[0068] Fig.12 for Fig.11 Enlarged view of point E in the middle;

[0069] Fig.13 for Fig.11 The enlarged view of F in the middle;

[0070] Fig.14 It is a schematic diagram of the connection between the outer cylinder and the side plate in the present invention;

[0071] Fig.15 The interior of a single outer cylinder in the present invention is schematically shown Figure 3 ;

[0072] Fig.16 for Fig.15 Enlarged view of G in the middle;

[0073] Fig.17 It is a schematic diagram of the connection between the fixed block and the moving block in the present invention;

[0074] Fig.18 The magnification of the moving block in the present invention Figure 1 ;

[0075] Fig.19 The magnification of the moving block in the present invention Figure 2 ;

[0076] Fig. 20 It is a partial cross-sectional view of the moving block in the present invention;

[0077] Fig.21 for Fig. 20 The enlarged view of the H in the middle;

[0078] Fig. 22 Schematic diagram of the auxiliary rod in the present invention.

[0079] The markings in the figure are:

[0080] 1. Outer cylinder; 2. Fixed block; 3. Bottom hole; 4. Moving block; 5. First spring; 6. Pressure sensor; 7. Power rod; 8. Second bearing; 9. Polygonal hole; 10. Polygonal rod; 11. Insert plate; 12. Slot; 13. Side wall hole; 14. Side plate; 15. Worm; 16. First bearing; 17. Push rod; 18. Auxiliary rod; 19. First drill bit; 20. Second drill bit; 21. Worm gear; 22. Rotating ring; 23. Rotating groove; 24. Inlet; 25. Pull rope; 26. Center hole; 27. Inner block; 28. Surface slide groove; 29. ​​Positioning hole; 30. Positioning block; 31. Movable hole; 32. Electromagnet; 33. Bottom groove; 34. Outer moving plate; 35. Extension plate; 36. Inner plate; 37. Inner groove; 38. Second spring; 39. Inner extension plate; 40. Cylinder hole; 41. Third spring; 42. Top groove; 43. Sleeve; 44. Ring groove; 45. Outer slide groove; 46. Through hole; 47. Linkage block; 48. First guide wheel; 49. Second guide wheel; 50. Second motor; 51. Reel; 52. Wheel cavity; 53. First motor; 54. Gear; 55. Straight rod; 56. Groove; 57. Guide hole; 58. Bottom rod; 59. Annular groove; 60. Third motor; 61. Mud barrel; 62. Guard plate; 63. Air bag; 64. Guide plate; 65. Guide groove; 66. Socket; 67. Sealing plate; 68. Mud guide groove; 69. Limit rod. DETAILED DESCRIPTION

[0081] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0082] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0083] The first aspect of the present invention provides an in-situ testing device for coal seam parameters in ultra-deep tunnels, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig.17 , Fig.18 , Fig.19 As shown, it includes an outer cylinder 1 for inserting into the monitoring borehole, and the device also includes a plurality of test components distributed along the axial direction of the outer cylinder 1, and the test components include:

[0084] A fixing block 2 fixed in the outer tube 1, wherein a bottom hole 3 is provided on the lower end surface of the fixing block 2;

[0085] A moving block 4 slidably connected to the bottom hole 3, the side of the moving block 4 is provided with an extension end, and the moving block 4 is provided with at least one through hole 46 penetrating through its side surface;

[0086] A first spring 5 having one end fixedly connected to the extension end and a pressure sensor 6 disposed at the bottom of the bottom hole 3, and the other end of the first spring 5 being fixedly connected to the force-bearing end of the pressure sensor 6;

[0087] A push rod 17 slidably connected to the through hole 46;

[0088] A first drill bit 19 is fixed to one end of the push rod 17, and a side wall hole 13 is provided on the side surface of the outer tube 1, which is directly opposite to the first drill bit 19, and the length and height of the side wall hole 13 are greater than the diameter of the push rod 17;

[0089] A driving portion for driving the push rod 17 to slide along the through hole 46;

[0090] The rotating portion is used to drive the push rod 17 to rotate when the push rod 17 slides along the through hole 46 .

[0091] In this embodiment, it is first necessary to select an appropriate position above the unmined coal seam, and use a drilling rig to drill downward in the vertical direction until it reaches the middle position above the expected mining working face to form a monitoring borehole. Here, the diameter of the monitoring borehole is larger than the outer diameter of the outer cylinder 1. After completion, the outer cylinder 1 is placed in the monitoring borehole, and a part of the outer cylinder 1 extends to the outside of the monitoring borehole and is fixed to the ground surface by a fixing frame. The fixing frame here can be composed of a steel frame, and the outer cylinder 1 can be fixed to the steel frame by bolts. At this time, the first drill bit 19 is close to the outer side surface of the outer cylinder 1, and a distance is maintained between the first drill bit 19 and the inner wall of the monitoring borehole. Then, the driving unit drives the push rod 17 to make the first drill bit 19 move toward the wall of the monitoring borehole, and at the same time, the rotating unit drives the push rod 17 to rotate. When the push rod 17 rotates, a hole is finally formed on the wall of the monitoring borehole through the first drill bit 19, and the hole forming process The rock and soil in the tunnel enters the gap between the outer side surface of the outer tube 1 and the inner wall of the monitoring borehole. When the depth of the hole is appropriate, a part of the push rod 17 remains in the through hole 46, and the other part remains in the hole. After the coal seam is mined, as the relative distance between the monitoring borehole and the working face changes, the mining movement of the overlying strata to the push rod 17 in the test components at different depths will also change continuously. This mining change will cause the pressure of the pressure sensor 6 to change through the push rod 17. Through this pressure change, it can be continuously reflected that in the process of continuous excavation of the working face of the tunnel coal seam, the influence of different depths in the overlying strata is affected. In addition, through this device, when a part of the overlying stratum slowly maintains a downward trend, since the position of the fixed block 2 remains unchanged in the outer tube 1, the pressure felt by the pressure sensor 6 will continue to increase. At this time, it can be reminded that the working channel needs to be reinforced in time to reduce the probability of risk.

[0092] As an implementation method, Figure 2 , Figure 6 , Figure 7 , Fig.11 , Fig.13 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 As shown, the driving unit includes:

[0093] A first motor 53 and a gear 54 are provided on the output shaft of the first motor 53 outside the moving block 4. A wheel cavity 52 is provided inside the moving block 4. The wheel cavity 52 is communicated with the through hole 46. The gear 54 is located in the wheel cavity 52.

[0094] The sleeve 43 and the spur rack embedded in the outer side of the sleeve 43, the outer side of the push rod 17 is provided with a collar groove 44, the sleeve 43 is sleeved on the collar groove 44, and the sleeve 43 and the collar groove 44 are rotatably connected, and the spur rack is meshed with the gear 54;

[0095] The linkage block 47 is fixed to the inner wall of the through hole 46 , and the outer diameter of the sleeve 43 is equal to the diameter of the push rod 17 . The linkage block 47 is slidably connected to the outer sliding groove 45 provided on the outer side surface of the sleeve 43 .

[0096] In this embodiment, when the rotating part drives the push rod 17 to rotate, since the sleeve 43 is rotatably connected with the ring groove 44, under the limiting action of the linkage block 47, the position of the sleeve 43 remains unchanged. When the first motor 53 is started, the push rod 17 can be driven to slide along the through hole 46 through the gear 54 and the spur rack. When the first drill bit 19 is required to drill a hole in the side wall of the monitoring borehole, the first motor 53 can be used to drive the first drill bit 19 to move toward the side wall of the monitoring borehole.

[0097] In order to improve the overall test component after drilling, Fig.18 , Fig.19 , Fig. 20 As shown, in the test component, two push rods 17 are provided, the two push rods 17 are located on different sides of the gear 54, and the two first drill bits 19 are located on opposite sides of the moving block 4. Such a test component is fixedly connected to the interior of the overlying rock formation through the two push rods 17 therein, making the test component more stable.

[0098] As an implementation method, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.15 , Fig.16 As shown, the first drill bit 19 is a hollow drill bit, and an inner hole is provided inside the push rod 17, and the inner hole penetrates the end surface of the push rod 17 close to the first drill bit 19. The test component also includes:

[0099] An auxiliary rod 18 slidably connected to the inner hole and a second drill bit 20 disposed at one end of the auxiliary rod 18;

[0100] A fixing and separating portion for fixing or separating the auxiliary rod 18 and the side wall of the inner hole when the second drill bit 20 is completely located outside the inner hole;

[0101] A pulling portion for pulling the auxiliary rod 18 to move toward the inner hole when the auxiliary rod 18 is separated from the side wall of the inner hole;

[0102] The guard plates 62 are arranged opposite to each other, and an activity area is formed between the guard plates 62;

[0103] A guide plate 64 slidably connected to a guide groove 65 provided on the inner side of the guard plate 62, and a limiting hole is provided on the guide plate 64;

[0104] The device also includes:

[0105] A mud tube 61 is inserted into each active area. The side surface of the mud tube 61 is provided with a socket 66 corresponding to the inlet 24. The socket 66 is connected to the inside of the mud tube 61. The top opening of the mud tube 61 is connected to the grout outlet of the grouting machine during grouting. The bottom opening of the mud tube 61 is sealed.

[0106] A support plate is provided on the side surface of the mud tube 61, and the support plate corresponds to the guide plate 64 one by one. A limit rod 69 is provided below the support plate. After the mud tube 61 enters the active area, the limit rod 69 enters the limit hole.

[0107] A driving member for driving the guide plate 64 to slide along the guide groove 65, so that the socket 66 finally enters the inlet 24 during the movement of the mud tube 61 toward the push rod 17;

[0108] The side surface of the auxiliary rod 18 is provided with a guide ring groove and a plurality of slurry guide grooves 68 connected to the guide ring groove. The outlet of the slurry guide groove 68 is located on the end face of the auxiliary rod 18 where the second drill bit 20 is located, and there is an outlet of the slurry guide groove 68 between adjacent blades of the second drill bit 20. After the socket 66 enters the inlet 24, the socket 66 is connected to the guide ring groove.

[0109] In this example, the outer cylinder 1 is inserted into the monitoring borehole and fixed to the ground by a fixing frame. Then, the mud cylinder 61 is inserted into the outer cylinder 1 by external force, and the mud cylinder 61 is moved laterally so that the mud cylinder 61 enters the active area. At this time, the limit rod 69 is located directly above the corresponding limit hole. Then, the mud cylinder 61 is lowered a certain distance so that the limit rod 69 is inserted into the limit hole. Before the driving unit drives the push rod 17 to make the first drill bit 19 move toward the hole wall of the monitoring borehole, the fixed separation unit fixes the auxiliary rod 18 to the side wall of the inner hole. At this time, the second drill bit 20 extends to the outside of the inner hole. When the push rod 17 makes the first drill bit 19 move toward the hole wall of the monitoring borehole, when the first drill bit 19 drills on the hole wall of the monitoring borehole, since the first drill bit 19 is a hollow drill bit, a cylinder composed of rock and soil will be formed in the hollow part of the first drill bit 19. The auxiliary rod 18 here is preferably a polygonal rod, and the shape of the inner hole matches that of the rod. When the first drill bit 19 rotates, it drives the second drill bit 20, thereby breaking the formed cylinder by the second drill bit 20. After the depth of the hole is appropriate, the driving unit drives the push rod 17 to move to the outside of the hole. When a part of the push rod 17 is still in the hole, the driving unit stops driving. At this time, there is a filling interval of a certain length between the first drill bit 19 and the bottom of the hole. Then, the fixed separation unit fixes the auxiliary rod 18 to the inner hole. The inner wall of the inner hole is separated, and then the pulling part pulls the auxiliary rod 18 to move inside the inner hole. When the bottom of the auxiliary rod 18 contacts the end of the inner hole, the pulling part stops pulling. At this time, the second drill bit 20 just moves to the outside of the hole, and the inlet 24 is connected with the filling interval through the guide ring groove, the slurry guide groove 68 and the inner hole, and the inlet 24 is opposite to the corresponding socket 66. After completion, the driving member drives the mud barrel 61 to move toward the push rod 17 until the socket 66 is inserted into the inlet 24. The outer diameter of the socket 66 is equal to the diameter of the inlet 24, and then the grouting machine is started, and the cement slurry is poured into the guide ring groove through the mud barrel 61, and then flows into the inner hole through the guide groove 68, and then filled into the filling area. After the filling area, the inner hole, the guide groove 68 and the guide ring groove are filled with cement, the grouting machine stops grouting. When the cement slurry is semi-hardened, the driving part separates the socket 66 from the inlet 24, and then the mud barrel 61 is taken out again by external force, which is convenient for the subsequent cleaning of the mud in the mud barrel 61. After the cement slurry hardens, tiny mining movements in the overlying rock formation can be sensed by the pressure sensor 6. The reason is that if the mining movement is transmitted directly through the push rod 17, the diameter of the hole will be slightly larger than the diameter of the push rod 17 during the process of drilling a hole by the first drill bit 19, and there are more gaps between the overlying rock formations on the inner wall of the hole and they are softer. Therefore, if the mining movement is only transmitted through the push rod 17, some smaller mining movements are difficult to be transmitted through the push rod 17. In this embodiment, the above problem can be solved after the cement slurry is hardened.When the working face in the coal seam of the tunnel is excavated to the front of the monitoring borehole, the monitoring borehole is the same as the excavation tunnel, and the broken soil between the outer side of the outer cylinder 1 and the inner wall of the monitoring borehole will fall into the tunnel. After the pressure change of the pressure sensor 6 is stable and the impact of the surface mining on the overlying rock layer is small, the outer cylinder 1 can be removed. Specifically, the driving unit first drives the push rod 17 to move inside the outer cylinder 1, and the rotating unit drives the push rod 17 to rotate and continuously changes the rotation direction. Since the length of the push rod 17 in the hole is shorter at this time, the length of the cement slurry in the inner hole is shorter, and the diameter of the hardened cement slurry in the slurry guide groove 68 is smaller. Therefore, under the action of the driving unit and the rotating unit, the hardened cement slurry can be separated from the inner wall of the inner hole, and the cement slurry in the slurry guide groove 68 is broken. When the first drill bit 19 is completely offset from the hardened cement slurry, the outer cylinder 1 can be removed. After taking out the outer tube 1, it is necessary to take out the auxiliary rod 18, and then clean the cement slurry remaining on the inner hole and the auxiliary rod 18, and then insert the auxiliary rod 18 into the inner hole and fix the auxiliary rod 18 by the fixing and separating part for the next use.

[0110] As an implementation method, Figure 6 , Fig. 9 , Fig. 22 As shown, the fixed separation part includes:

[0111] A positioning block 30 is slidably connected to a movable hole 31 provided on the side wall of the inner hole. The auxiliary rod 18 is a polygonal prism. The inner hole matches the auxiliary rod 18. The side surface of the auxiliary rod 18 is provided with positioning holes 29 corresponding to the positioning block 30 one by one.

[0112] The electromagnet 32 ​​disposed on the top of the movable hole 31 and the permanent magnet disposed in the positioning block 30, the electromagnet 32 ​​is directly opposite to the permanent magnet, so as to generate a force of mutual repulsion or attraction.

[0113] In this embodiment, when the positioning block 30 is directly opposite to the positioning hole 29, when the electromagnet 32 ​​is energized, a mutually repulsive force is generated between the electromagnet 32 ​​and the permanent magnet, and a part of the positioning block 30 can be moved to the positioning hole 29. In this way, the auxiliary rod 18 can be fixed on the side wall of the inner hole. When the electromagnet 32 ​​is energized, a mutually attractive force is generated between the electromagnet 32 ​​and the permanent magnet, and the positioning block 30 can be moved toward the inside of the movable hole 31 until the positioning block 30 is completely separated from the positioning hole 29. At this time, the auxiliary rod 18 can be separated from the side wall of the inner hole, and the auxiliary rod 18 can slide in the inner hole.

[0114] As an implementation method, Fig.11 , Fig.13 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 As shown, the pulling portion includes:

[0115] A second motor 50 disposed on the moving block 4 and a reel 51 disposed on the output shaft of the second motor 50;

[0116] A first guide wheel 48 is provided at the end of the push rod 17, and the first guide wheel 48 and the first drill bit 19 are located at two different ends of the push rod 17; a rope hole connected to the inner hole is provided at the end surface of the push rod 17 near the first guide wheel 48;

[0117] A second guide wheel 49 is provided on the moving block 4, and the second guide wheel 49 corresponds to the first guide wheel 48 one by one;

[0118] One end of the pull rope 25 is fixedly connected to the bottom of the auxiliary rod 18 , the pull rope 25 passes through the rope hole, and the other end of the pull rope 25 is fixed in the rope groove of the reel 51 , and the pull rope 25 passes around the first guide wheel 48 and the second guide wheel 49 .

[0119] In this embodiment, when the first drill bit 19 drills the side wall of the monitoring borehole, the auxiliary rod 18 is fixedly connected to the side wall of the inner hole. Therefore, in this process, the second motor 50 is required to cooperate with the drilling speed of the push rod 17 to release the pull rope 25 to prevent the pull rope 25 from being tightened during the drilling process of the push rod 17. After the auxiliary rod 18 is separated from the side wall of the inner cylinder, the second motor 50 is started, so that the pull rope 25 is wound by the reel 51, and the auxiliary rod 18 is pulled by the pull rope 25, so that the auxiliary rod 18 moves toward the inside of the inner hole until the bottom of the auxiliary rod 18 contacts the bottom of the inner hole.

[0120] Here we further introduce a structure of a driving member, such as Fig.15 , Fig.16 As shown, the driving member is an airbag 63 connecting the end of the guide plate 64 and the inner wall of the outer tube 1. In different test components, the airbag 63 is connected through an inflation tube. After the outer tube 1 is inserted into the monitoring borehole, the inflation tube is connected to the inflation port of the inflation pump. When the inflation pump is started, air can be inflated into the airbag 63 to push the mud barrel 61. After the airbag 63 is deflated, the mud barrel 61 can gradually return to its original position due to the contraction of the airbag 63.

[0121] In addition, if Fig.15 , Fig.16 As shown, the test component also includes a sealing plate 67 arranged on the socket 66, which is used to adhere to the side surface of the push rod 17 after the socket 66 enters the inlet 24, so that after the mud is filled into the inner hole, the mud can be effectively prevented from entering the outer tube 1.

[0122] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Fig.11 , Fig.12 , Fig.14 As shown, the test components also include:

[0123] The side plate 14 and the plug plate 11 disposed on the top of the side plate 14, the plug plate 11 is slidably connected with the slot 12 disposed on the top wall of the side wall hole 13, the bottom of the plug plate 11 is provided with a bottom groove 33, the side plate 14 is provided with a tube hole 40, and the push rod 17 is rotatably connected with the tube hole 40;

[0124] The extension plate 35 and the outer moving plate 34 with the top groove 42 at the top, the inner side of the outer moving plate 34 is provided with the inner groove 37, and the outer moving plate 34 is slidably connected with the bottom groove 33, and the extension plate 35 is arranged at the top of the bottom groove 33, and the extension plate 35 is slidably connected with the top groove 42;

[0125] An inner plate 36 slidably connected to the inner groove 37 , wherein the side of the inner plate 36 facing the inner tube is flush with the inner side of the outer moving plate 34 ;

[0126] A second spring 38 having one end fixedly connected to the top of the inner groove 37 and the other end of the second spring 38 fixed to the top of the inner plate 36;

[0127] An inner extension plate 39 is provided on the inner wall of the outer tube 1 and a third spring 41 having one end fixedly connected to one side of the inner extension plate 39, and the other end of the third spring 41 is fixed to the inner side surface of the outer moving plate 34;

[0128] A straight rod 55 having one end rotatably connected to a circular groove 59 provided on the outer side of the push rod 17, a groove 56 is provided on the side of the moving block 4 facing the corresponding first drill bit 19, and the straight rod 55 matches the groove 56 to receive the straight rod 55 through the groove 56;

[0129] The side surface of the bottom rod 58 is fixedly connected to the other end of the straight rod 55, and the side wall of the groove 56 is provided with a guide hole 57. The bottom rod 58 is divided into a guide rod and a supporting rod by the straight rod 55. The guide rod is slidably connected to the guide hole 57, and the supporting rod is used to push the outer moving plate 34 after contacting the inner side surface of the outer moving plate 34.

[0130] In this embodiment, when the outer cylinder 1 enters the monitoring borehole, the side plate 14 is located in the side wall hole 13. At this time, the second spring 38 is in a compressed state, and the bottom of the inner plate 36 contacts the bottom of the side wall hole 13. When the first drill bit 19 is drilling, the push rod 17 drives the straight rod 55 to move in the direction of the side plate 14, and the guide rod slides in the guide hole 57 to ensure the stability of the straight rod 55. After the supporting rod contacts the inner side surface of the outer plate 34, when the push rod 17 continues to drill, it will push the outer plate 34, so that the side plate 14 overcomes the elastic force of the third spring 41 and moves to the outside of the side wall hole 13. When the inner plate 36 is separated from the bottom of the side wall hole 13, Under the elastic force of the second spring 38, the inner plate 36 will move downward for a distance. When the depth of the hole is sufficient, the push rod 17 needs to move a distance to the outside of the hole. Under the elastic force of the third spring 41, the side plate 14 will be driven to move in the direction of the side wall hole 13. After the inner plate 36 contacts the outer side surface of the outer tube 1, the side plate 14 will be prevented from further movement. In this way, after the overlying rock strata are affected by the mining, they can be transmitted through the push rod 17. At the same time, the inside of the outer tube 1 is separated from the outside through the side plate 14. When the mud tube 61 is grouting, part of the cement slurry will overflow, thereby effectively preventing the overflowed cement slurry from entering the inside of the outer tube 1.

[0131] As an implementation method, Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.14 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 As shown, the rotating part includes:

[0132] A worm wheel 21 is provided with a center hole 26 and an inner block 27 provided on the inner wall of the center hole 26. The push rod 17 passes through the center hole 26. The inner block 27 is slidably connected with a surface groove 28 provided on the side surface of the push rod 17.

[0133] A rotating ring 22 is provided on the end surface of the worm wheel 21, and the rotating ring 22 is rotatably connected to a rotating groove 23 provided on the inner surface of the side plate 14;

[0134] A worm 15 meshing with the worm wheel 21, the worm 15 and the side plate 14 are connected via a first bearing 16, and both ends of the worm 15 are provided with a polygonal rod 10;

[0135] The device also includes:

[0136] A power rod 7 connected to the inner wall of the outer cylinder 1 through a second bearing 8. In adjacent test components, the power rod 7 is provided between adjacent worms 15. Both end surfaces of the power rod 7 are provided with first polygonal holes 9. The polygonal rod 10 is slidably connected with the corresponding first polygonal holes 9.

[0137] A third motor 60 corresponding to the push rod 17 in the test component, and the third motor 60 is fixed to the top of the outer cylinder 1;

[0138] A driving shaft is fixedly connected to the output shaft of the third motor 60 at one end, and a second polygonal hole 9 is provided on the bottom end surface of the driving shaft, and the second polygonal hole 9 matches the polygonal rod 10; in the uppermost test component, the polygonal rod 10 located above is slidably connected to the corresponding second polygonal hole 9.

[0139] In this embodiment, when the third motor 60 is started, the worm 15 can be driven to rotate through the drive shaft and the power rod 7, thereby driving the push rod 17 to rotate through the worm gear 21. Here, since the polygonal rod 10 is slidingly connected to the first polygonal hole 9, the transmission effect of the push rod 17 is not affected after the overlying rock formation is mined.

[0140] Here, preferably, Figure 1 , Figure 2 , Figure 6 , Figure 8 , Fig.10 As shown, the outer cylinder 1 can be composed of multiple cylinders, the ends of the multiple cylinders are detachably connected, and a test component is arranged between each cylinder. According to the depth of the monitoring borehole, after one of the cylinders is placed into the monitoring borehole, the other cylinder is connected to the previous cylinder. When the two are connected, the polygonal rod 10 is inserted into the first polygonal hole 9. After the last cylinder is connected to the previous cylinder, the third motor 60 is installed on the last cylinder, and the corresponding polygonal rod 10 on the last cylinder is inserted into the second polygonal hole 9 on the drive shaft, and then the drive shaft is installed on the output shaft of the third motor 60.

[0141] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0142] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An in-situ testing device for coal seam parameters in an ultra-deep tunnel, comprising an outer cylinder (1) for inserting into a monitoring borehole, characterized in that: The device further comprises a plurality of test components distributed in the outer cylinder (1) along its axial direction, wherein the test components comprise: A fixed block (2) fixed inside the outer cylinder (1), wherein a bottom hole (3) is provided on the lower end surface of the fixed block (2); A moving block (4) slidably connected to the bottom hole (3), wherein the side of the moving block (4) is provided with an extension end, and the moving block (4) is provided with at least one through hole (46) penetrating its side surface; a first spring (5) having one end fixedly connected to the extension end and a pressure sensor (6) arranged at the bottom of the bottom hole (3), wherein the other end of the first spring (5) is fixedly connected to the force-bearing end of the pressure sensor (6); a push rod (17) slidably connected to the through hole (46); a first drill bit (19) fixed to one end of the push rod (17); a side wall hole (13) corresponding to the first drill bit (19) is provided on the side surface of the outer cylinder (1); the length and height of the side wall hole (13) are both greater than the diameter of the push rod (17); A driving portion for driving the push rod (17) to slide along the through hole (46); A rotating part is used to drive the push rod (17) to rotate when the push rod (17) slides along the through hole (46).

2. The in-situ testing device for coal seam parameters in ultra-deep tunnels according to claim 1 is characterized in that: The driving unit comprises: A first motor (53) is arranged outside the moving block (4) and a gear (54) is arranged on the output shaft of the first motor (53); a wheel cavity (52) is arranged inside the moving block (4); the wheel cavity (52) is communicated with the through hole (46); and the gear (54) is located in the wheel cavity (52); A sleeve (43) and a spur rack embedded in the outer side of the sleeve (43), a collar groove (44) is provided on the outer side of the push rod (17), the sleeve (43) is sleeved on the collar groove (44), and the sleeve (43) and the collar groove (44) are rotatably connected, and the spur rack is meshed with a gear (54); A linkage block (47) is fixed to the inner wall of the through hole (46); the outer diameter of the sleeve (43) is equal to the diameter of the push rod (17); and the linkage block (47) is slidably connected to an outer sliding groove (45) provided on the outer side surface of the sleeve (43).

3. The in-situ testing device for coal seam parameters in ultra-deep tunnel according to claim 2 is characterized in that: In the test component, two push rods (17) are provided, the two push rods (17) are located on different sides of the gear (54), and two first drill bits (19) are located on opposite sides of the moving block (4).

4. An in-situ testing device for coal seam parameters in ultra-deep tunnels according to any one of claims 1 to 3, characterized in that: The first drill bit (19) is a hollow drill bit, an inner hole is provided inside the push rod (17), and the inner hole penetrates the end surface of the push rod (17) close to the first drill bit (19), and the test component further includes: An auxiliary rod (18) slidably connected to the inner hole and a second drill bit (20) arranged at one end of the auxiliary rod (18); A fixing and separating portion for fixing or separating the auxiliary rod (18) and the side wall of the inner hole when the second drill bit (20) is completely located outside the inner hole; A pulling portion for pulling the auxiliary rod (18) to move toward the inner hole when the auxiliary rod (18) and the side wall of the inner hole are separated from each other; Guard plates (62) are arranged opposite to each other, and an activity area is formed between the guard plates (62); a guide plate (64) slidably connected to a guide groove (65) provided on the inner side of the guard plate (62), wherein a limiting hole is provided on the guide plate (64); The device also includes: A mud barrel (61) for being inserted into each of the active areas, wherein the side surface of the mud barrel (61) is provided with a socket (66) corresponding to the inlet (24) one by one, the socket (66) is communicated with the inside of the mud barrel (61), the top opening of the mud barrel (61) is communicated with the grout outlet of the grouting machine during grouting, and the bottom opening of the mud barrel (61) is sealed; A support plate is arranged on the side surface of the mud tube (61), the support plate corresponds to the guide plate (64) one by one, a limiting rod is arranged below the support plate, and after the mud tube (61) enters the active area, the limiting rod enters the limiting hole; A driving member for driving the guide plate (64) to slide along the guide groove (65), so that the socket (66) finally enters the inlet (24) during the movement of the mud barrel (61) toward the push rod (17); The side surface of the auxiliary rod (18) is provided with a guide ring groove and a plurality of slurry guide grooves (68) connected to the guide ring groove. The outlet of the slurry guide groove (68) is located at the end surface of the auxiliary rod (18) where the second drill bit (20) is located, and there is an outlet of the slurry guide groove (68) between adjacent blades of the second drill bit (20). After the socket (66) enters the inlet (24), the socket (66) is connected to the guide ring groove.

5. The in-situ testing device for coal seam parameters in ultra-deep tunnel according to claim 4 is characterized in that: The fixed separation part comprises: a positioning block (30) slidably connected to a movable hole (31) provided on the side wall of the inner hole, the auxiliary rod (18) being a polygonal prism, the inner hole matching the auxiliary rod (18), and the side surface of the auxiliary rod (18) being provided with positioning holes (29) corresponding one to one with the positioning block (30); An electromagnet (32) disposed on the top of the movable hole (31) and a permanent magnet disposed in the positioning block (30), wherein the electromagnet (32) is directly opposite to the permanent magnet, is used to generate mutually repelling or attracting forces.

6. The in-situ testing device for coal seam parameters in ultra-deep tunnel according to claim 4 is characterized in that: The pulling portion comprises: A second motor (50) disposed on the moving block (4) and a reel (51) disposed on an output shaft of the second motor (50); A first guide wheel (48) is arranged at the end of the push rod (17), wherein the first guide wheel (48) and the first drill bit (19) are located at two different ends of the push rod (17); a rope hole communicating with the inner hole is arranged at the end surface of the push rod (17) near the first guide wheel (48); A second guide wheel (49) is arranged on the moving block (4), wherein the second guide wheel (49) corresponds one-to-one to the first guide wheel (48); A pull rope (25) is fixedly connected to the bottom of the auxiliary rod (18) at one end, the pull rope (25) passes through the rope hole, and the other end of the pull rope (25) is fixed in the rope groove of the reel (51), and the pull rope (25) passes around the first guide wheel (48) and the second guide wheel (49).

7. The in-situ testing device for coal seam parameters in ultra-deep tunnels according to claim 4 is characterized in that: The driving member is an air bag (63) connecting the end of the guide plate (64) and the inner wall of the outer tube (1). In different test components, the air bag (63) is connected through an inflation tube. After the outer tube (1) is inserted into the monitoring borehole, the inflation tube is connected to the inflation port of the inflation pump.

8. The in-situ testing device for coal seam parameters in ultra-deep tunnels according to any one of claims 5 to 7, characterized in that: The test component also includes a sealing plate (67) disposed on the socket (66) and used to be attached to the side surface of the push rod (17) after the socket (66) enters the interior of the inlet (24).

9. The in-situ testing device for coal seam parameters in ultra-deep tunnels according to claim 8, characterized in that: The test component also includes: A side plate (14) and an inserting plate (11) arranged on the top of the side plate (14), the inserting plate (11) being slidably connected to a slot (12) arranged on the top wall of the side wall hole (13), a bottom groove (33) being arranged at the bottom of the inserting plate (11), a tube hole (40) being arranged on the side plate (14), and the push rod (17) being rotatably connected to the tube hole (40); An extension plate (35) and an outer moving plate (34) with a top groove (42) at the top, an inner groove (37) is provided on the inner side of the outer moving plate (34), and the outer moving plate (34) is slidably connected to the bottom groove (33), and the extension plate (35) is arranged on the top of the bottom groove (33), and the extension plate (35) is slidably connected to the top groove (42); An inner plate (36) slidably connected to the inner groove (37), wherein the side surface of the inner plate (36) facing the inner tube is flush with the inner side surface of the outer moving plate (34); a second spring (38) having one end fixedly connected to the top of the inner groove (37), and the other end of the second spring (38) fixed to the top of the inner plate (36); An inner extension plate (39) provided on the inner wall of the outer cylinder (1) and a third spring (41) having one end fixedly connected to one side of the inner extension plate (39), and the other end of the third spring (41) fixed to the inner side surface of the outer displacement plate (34); A straight rod (55) having one end rotatably connected to a circular groove (59) provided on the outer side of the push rod (17); a groove (56) is provided on the side of the moving block (4) facing the corresponding first drill bit (19); the straight rod (55) matches the groove (56) so as to receive the straight rod (55) through the groove (56); A bottom rod (58) having a side surface fixedly connected to the other end of the straight rod (55), a guide hole (57) being provided on the side wall of the groove (56), the bottom rod (58) being divided into a guide rod and a support rod by the straight rod (55), the guide rod being slidably connected to the guide hole (57), and the support rod being used to push the outer moving plate (34) after contacting the inner side surface of the outer moving plate (34).

10. The in-situ testing device for coal seam parameters in ultra-deep tunnels according to claim 9, characterized in that: The rotating part comprises: A worm wheel (21) is provided with a center hole (26) and an inner block (27) provided on the inner wall of the center hole (26), the push rod (17) passes through the center hole (26), and the inner block (27) is slidably connected to a surface slide groove (28) provided on the side surface of the push rod (17); A rotating ring (22) is arranged on the end surface of the worm wheel (21), and the rotating ring (22) is rotatably connected to a rotating groove (23) arranged on the inner side surface of the side plate (14); a worm (15) meshing with the worm wheel (21), the worm (15) being connected to the side plate (14) via a first bearing (16), and polygonal rods (10) being provided at both ends of the worm (15); The device also includes: A power rod (7) connected to the inner wall of the outer cylinder (1) via a second bearing (8), wherein the power rod (7) is provided between adjacent worm gears (15) in adjacent test components, and first polygonal holes (9) are provided on both end surfaces of the power rod (7), and the polygonal rod (10) is slidably connected to the corresponding first polygonal holes (9); a third motor (60) corresponding one-to-one to the push rod (17) in the test component, wherein the third motor (60) is fixed to the top of the outer cylinder (1); A driving shaft having one end fixedly connected to the output shaft of the third motor (60), wherein a second polygonal hole (9) is provided on the bottom end surface of the driving shaft, wherein the second polygonal hole (9) matches the polygonal rod (10); and within the uppermost test component, the upper polygonal rod (10) is slidably connected to the corresponding second polygonal hole (9).

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