A coal seam similarity simulation experimental device and experimental method thereof

Abstract

The present invention discloses a coal seam similarity simulation experiment device and an experiment method thereof, comprising: a supporting main frame; an annular frame, rotatably connected in the supporting main frame; at least one adjusting wheel group, mounted on the supporting main frame and in contact with the peripheral side of the annular frame, configured to drive the annular frame supported by it to rotate circumferentially; a mold component, connected in the annular frame through a fixed truss, the mold component having a mold cavity for layered paving of a coal seam model; a loading component, configured to load a force on the coal seam model. The present invention is driven to rotate by mounting the annular frame on the adjusting wheel group, the mold component is located in the annular frame and has a mold cavity, not only realizing the tilt adjustment of the mold component in the annular frame at any angle, the angle adjustment is more flexible and suitable for large-angle coal seam simulation experiments, but also reducing the stress concentration caused by excessive local force on the annular frame during rotation, effectively extending the service life.

Description

Technical Field

[0001] The invention relates to the technical field of coal seam experiments, and in particular to a coal seam similarity simulation experimental device and an experimental method thereof. Background Art

[0002] The inclination of coal seams is divided according to the angle between the coal seams and the horizontal plane. Specifically, coal seams with an inclination angle below 8° are nearly horizontal coal seams, coal seams with an inclination angle between 8°-25° are gently inclined coal seams, coal seams with an inclination angle between 25°-45° are inclined coal seams, and coal seams with an inclination angle above 45° are steeply inclined coal seams.

[0003] During coal mining, in order to ensure the normal and safe production, a series of measurements need to be carried out on the coal seam, so that operators can understand the geometric shape, spatial position, fixed volume and other information of the coal seam. However, due to the particularity of the geological conditions for coal seam mining, it is difficult to measure some parameters on site, or it is impossible to monitor them, especially for steeply inclined coal seams. Parameters such as pressure distribution and overburden migration are very important during coal seam mining, and they are difficult to measure.

[0004] Chinese invention patent with application number CN201521075771.3: A similar simulation experiment device for inclined or steeply inclined coal seams, the technical solution of which includes two inner and outer frames, the left column of the inner frame can slide in the horizontal direction; the angle between the bottom plate of the chamber for laying similar materials and the horizontal plane is adjusted by the lifting jack, and the hydraulic heads on the top plate of the inner frame are fixedly connected to a pressure plate; that is, the disclosed technical solution is to drive the outer frame to tilt through the cooperation of the horizontal jack 7, the lifting jack 17 and the jack 7, so as to be used for inclined or steeply inclined similar experiments;

[0005] Chinese invention patent with application number 201510829346.7: A steep inclination similarity simulation experimental platform, in which the bearing device comprises an upper horizontal slide and a lower horizontal slide arranged in parallel, and the upper horizontal slide and the lower horizontal slide are connected and fixed by two symmetrically arranged vertical slides, that is, the model frame 2 is driven by the push jack 3 to move in the vertical slide, the horizontal slide 16, and the arc-shaped limit slide 15 to adjust the steep inclination angle;

[0006] However, in actual use, the above-mentioned comparative documents all have the following problems: 1. During the simulation experiment, although the corresponding jacks can drive the external frame / model frame to adjust the angle, the angle adjustment is limited and cannot be applied to the external frame / model frame for a larger angle adjustment to match different tilt experiments. Some other experiments require multiple jacks to work together to achieve the corresponding actions, and the overall structure is complicated; 2. When the angle of the model frame is adjusted, the corresponding position is unevenly stressed, which is prone to stress concentration and causes damage to related components. Summary of the invention

[0007] The purpose of the present invention is to provide a coal seam similarity simulation experiment device, which not only realizes the inclination adjustment of the coal seam simulation experiment at any angle with flexible angle adjustment, but also reduces the stress concentration caused by excessive local force during angle rotation, thereby effectively extending the service life.

[0008] To achieve the above purpose, the present invention provides a coal seam similarity simulation experimental device, comprising:

[0009] Support the main frame;

[0010] The annular frame is rotatably connected in the supporting main frame;

[0011] At least one adjusting wheel set is mounted on the supporting main frame and in contact with the peripheral side of the annular frame, and is configured to drive the annular frame supported by it to rotate in the circumferential direction;

[0012] The mold component is connected to the annular frame through a fixed truss, and the mold component has a mold cavity for layering the coal seam model;

[0013] The loading component is configured to apply a loading force to the coal seam model.

[0014] In one example of the present invention, the mold assembly includes a support frame, and a plurality of mold plates;

[0015] A plurality of mold plates are connected on both sides of the support frame to form the mold cavity.

[0016] In one example of the present invention, the support frame is a rectangular frame, and the side length is provided with a plurality of strip holes arranged along the length direction;

[0017] The bolts pass through the through holes and the strip holes on both sides of the mold plate and are threaded with nuts to fix the mold plate on the mold component.

[0018] In one example of the present invention, the mold component further includes a telescopic plate group, and the telescopic plate group includes:

[0019] A fixing plate, fixed to the bottom end of the mold component, the fixing plate having a limiting groove;

[0020] A slide plate is slidably positioned in the limiting groove and fixed to the end side of the mold component;

[0021] The mold cavity is formed by the telescopic plate group, a plurality of mold plates and two sides of the supporting frame.

[0022] In one example of the present invention, when the bottom end of the mold part is horizontal, the length of the strip-shaped hole at the lowermost side is the longest;

[0023] The slide plate is provided with a plurality of mounting holes;

[0024] The bolt passes through one of the mounting holes and the lowermost strip hole and is threaded with a nut to fix the slide plate on the mold component.

[0025] In one example of the present invention, the adjusting wheel set comprises:

[0026] A roller assembly, rotatably mounted on an adjusting plate;

[0027] A plurality of supporting wheels for limiting the end sides of the annular frame are arranged on the supporting main frame.

[0028] In one example of the present invention, the adjusting wheel set is a pair and is symmetrically arranged at the lower end of the supporting main frame;

[0029] The roller assembly comprises:

[0030] The axis positions of the first roller, the second roller and the third roller are connected to form an obtuse angle;

[0031] The second roller located in the middle is connected to the driving assembly, and the first roller and the third roller are tangent to and connected to the circumference of the annular frame;

[0032] The first transmission belt and the second transmission belt are used to rotate the first roller, the second roller and the third roller at the same speed and in the same direction. The first transmission belt is wound around the end sides of the first roller and the second roller, and the second transmission belt is wound around the end sides of the second roller and the third roller.

[0033] In one example of the present invention, the adjustment plate is rotatably mounted on the base with the second roller axis as the center;

[0034] The adjusting wheel set also includes:

[0035] The limiting rod is threadedly connected to the base, and the upper end thereof is in contact with the adjusting plate.

[0036] In one example of the present invention, when the bottom end of the mold component is horizontal, the vertical center of the mold component, the vertical center of the annular frame, and the vertical center of the supporting main frame coincide with each other.

[0037] The present invention also aims to provide a coal seam similarity simulation experimental method, in which an annular frame is installed on an adjusting wheel group and is driven to rotate. The mold component is located in the annular frame and has a mold cavity. Different strata and coal seams can be placed in the mold cavity in layers as required. This not only realizes the tilt adjustment of the mold component in the annular frame at any angle, but also reduces the stress concentration caused by excessive local force on the annular frame during rotation, thereby extending the service life.

[0038] A coal seam similarity simulation experimental method specifically comprises the following steps:

[0039] S1, initial state, the bottom end of the mold part is horizontal;

[0040] S2, according to the coal seam simulation experiment parameters, different strata and coal seams are laid in layers in the mold cavity as required;

[0041] Multiple mold plates are spaced front and back and connected one by one on the support frame from bottom to top, so that a mold cavity for paving the coal seam model is formed between the front and rear mold plates and the mold components; when different strata and coal seams are laid in layers in the mold cavity as required, the mold plates can be gradually installed to facilitate the loading components to load stress on each coal seam;

[0042] S3, when the laying is completed, the loading component presses on the mold component, and the output end acts on the laid coal seam; or when each coal seam is laid, the loading component is used to load stress to complete the first laying;

[0043] S4, when the model is relatively stable, the angle is adjusted according to the simulated formation dip;

[0044] The annular frame is driven to rotate, so that the annular frame rotates under the action of the circumferential support of the adjusting wheel set, and when the required angle is reached, the annular frame stops rotating;

[0045] Then the corresponding coal seam is laid, and stress can be loaded through loading components to complete the second paving.

[0046] Compared with the prior art, the present coal seam similarity simulation experiment device is installed on an adjusting wheel group through an annular frame and is driven to rotate. The mold component is located in the annular frame and has a mold cavity. Different strata and coal seams can be placed in the mold cavity in layers as required, which not only realizes the tilt adjustment of the mold component in the annular frame at any angle, but also makes the angle adjustment more flexible and suitable for large-angle coal seam simulation experiments. It also reduces the stress concentration caused by excessive local force on the annular frame during rotation, thereby extending the service life; in addition, the vertical centers of the mold component, the annular frame, and the supporting main frame can coincide with each other. After the multi-layer coal seams are paved or the angle is adjusted, the overall eccentricity of the device is small, and the experiment is more stable; since a telescopic plate group is also provided on the mold component, the slide plate slides on the fixed plate and can be fixed on the supporting frame at a corresponding position, thereby realizing the rapid paving of the coal seam in the experiment and avoiding the cumbersome operation caused by the continuous installation of bolts; in addition, the telescopic plate group is used in combination with the mold plate, which can be suitable for different simulation experiments with higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is an overall schematic diagram of the present invention (loading components are not shown);

[0048] Figure 2 It is the overall front view of the present invention (loading components are not shown);

[0049] Figure 3 It is a schematic diagram of the supporting main frame structure in the present invention;

[0050] Figure 4 It is a schematic structural diagram of an embodiment of a roller group in the present invention;

[0051] Figure 5 It is a front view of the mold plate in the present invention installed on the support frame;

[0052] Figure 6 This is a front view of the telescopic plate group in the present invention installed on the supporting frame;

[0053] Figure 7 It is a schematic diagram of the structure of the telescopic plate group in the present invention;

[0054] In the figure: 10, supporting main frame, 11, supporting wheels, 12, supporting bottom plate;

[0055] 20. Ring frame;

[0056] 30. Fix the truss;

[0057] 40. mold component, 41. strip hole, 42. mold plate, 43. fixing plate, 431. limiting groove, 44. slide plate, 441. mounting hole, 45. supporting frame;

[0058] 50. Adjusting wheel set, 51. Base, 52. Adjusting plate, 53. First roller, 54. Second roller, 55. Third roller, 56. First transmission belt, 57. Second transmission belt, 58. Limiting rod; 60. Driving assembly. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" 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. Words such as "connect" or "connected" 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.

[0061] like Figure 1 , Figure 2 As shown, the present invention is a coal seam similarity simulation experimental device, comprising:

[0062] Supporting main frame 10;

[0063] The annular frame 20 is rotatably connected in the supporting main frame 10;

[0064] At least one adjusting wheel set 50, mounted on the supporting main frame 10 and in contact with the peripheral side of the annular frame 20, configured to drive the annular frame 20 supported by it to rotate circumferentially;

[0065] The mold component 40 is connected to the annular frame 20 through the fixed truss 30, and the mold component 40 has a mold cavity for layering the coal seam model;

[0066] The loading component is configured to apply a loading force to the coal seam model.

[0067] Specifically, Figure 3 As shown, the support main frame 10 is an integral support component and can withstand a certain motion load. It can be formed by welding or bolting through I-beams, angle steels, rectangular steels and other profiles. For example, the lower left and right sides of the support main frame 10 are triangular structures to improve the support effect, and the upper part is extended upward and then connected to the left and right sides; the bottom of the support main frame 10 can be arranged with support bottom plates 12 on the left and right sides to support the adjustment wheel group 50. At this time, the adjustment wheel group 50 is installed on the support bottom plate 12;

[0068] The adjusting wheel set 50 is used to receive and drive the annular frame 20 to rotate;

[0069] The annular frame 20 is placed on the adjusting wheel set 50 and can maintain circumferential rotation;

[0070] The mold component 40 is fixedly installed in the annular frame 20 through the fixed truss 30. The fixed truss 30 can use steel to connect the mold component 40 and the annular frame 20 to play a supporting and stabilizing role. The mold cavity on the mold component 40 can lay the experimental coal seam model flat. At the same time, the mold component 40 can also load stress, that is, the loading components such as jacks are pressed on the mold component 40 and the output end acts on the laid coal seam.

[0071] Preferably, the vertical center of the mold component 40, the vertical center of the annular frame 20, and the vertical center of the supporting main frame 10 coincide with each other to ensure that when the bottom end of the mold component 40 is horizontal, that is, when it is not tilted at an angle, the overall center of the coal seam similarity simulation experimental device is consistent. In this case, when the annular frame 20 rotates, the stress concentration of the annular frame 20 and the supporting main frame 10 can be reduced, and the overall eccentricity is small, and the stability of the experiment is stronger;

[0072] When the coal seam similarity simulation experiment device is initially used, the bottom end of the mold component 40 is in a horizontal state. According to the coal seam simulation experiment parameters, different strata and coal seams are laid in layers in the mold cavity as required. When the laying is completed, the mold component 40 can be pressed by a loading component such as a jack. The output end of the loading component can be installed with a pressure plate and act on the laid coal seam. Or when each coal seam is laid, stress can be loaded by the loading component to complete the first laying.

[0073] When the model is relatively stable, the angle is adjusted according to the simulated stratum inclination, that is, the annular frame 20 is driven to rotate, and when the required angle is reached, the annular frame 20 stops rotating. For example, when conducting a steeply inclined coal seam experiment, the annular frame 20 rotates at an angle greater than 45°, and then the corresponding coal seam is laid, and stress can be loaded through the loading component to complete the second paving;

[0074] The coal seam similarity simulation experimental device is installed on the adjusting wheel group 50 through the annular frame 20 and is driven to rotate. The mold component 40 is located in the annular frame 20 and has a mold cavity. Different strata and coal seams can be placed in the mold cavity in layers as required. Not only can the mold component 40 in the annular frame 20 be tilted and adjusted at any angle, the adjustment is more flexible and suitable for large angles, but also the stress concentration caused by excessive local force on the annular frame 20 during rotation is reduced, thereby extending the service life.

[0075] In some examples of the present invention, Figure 1 , Figure 2 , Figure 5 As shown, the mold component 40 includes a support frame 45 and a plurality of mold plates 42;

[0076] A plurality of mold plates 42 are connected to both sides of the support frame 45 to form the mold cavity;

[0077] Specifically, the support frame 45 is a frame structure;

[0078] The mold plate 42 has a certain width, which can be suitable for laying each coal seam, and the side facing the support frame 45 is flat to ensure the sealing of the contact with the support frame 45; multiple mold plates 42 are spaced front and back and connected one by one on the support frame 45 from bottom to top, so that a mold cavity for paving the coal seam model is formed between the front and rear mold plates 42 and the mold component 40; when different strata and coal seams are laid in layers in the mold cavity as required, the mold plates 42 can be gradually installed to facilitate the loading component to load stress on each coal seam.

[0079] In some examples of the present invention, Figure 5 As shown, the support frame 45 is a rectangular frame, and the side length is provided with a plurality of strip holes 41 arranged along the length direction;

[0080] The bolts are passed through the through holes and the strip holes 41 on both sides of the mold plate 42 and then threaded with nuts to fix the mold plate 42 on the mold component 40;

[0081] Specifically, a plurality of strip holes 41 arranged side by side may be provided on the left, right and top sides of the support frame 45, and the arrangement direction of the strip holes 41 is consistent with the length direction of the corresponding side length; the strip holes 41 can be used to match the positions of the mold plates 42 of different heights and facilitate their fixing;

[0082] The left and right ends of the mold plate 42 are provided with through holes for bolts to pass through. The mold plate 42 can be made of transparent materials, such as acrylic plates, to facilitate observation. When different strata and coal seams in the experimental model are paved in layers as required, the mold plate 42 can be fixed by selecting appropriate strip holes 41 according to the layer height.

[0083] In some examples of the present invention, Figure 6 , Figure 7 As shown, the mold component 40 is also provided with a telescopic plate group, which is located at the bottom end of the support frame 45 and includes:

[0084] A fixing plate 43 is fixed to the bottom end of the mold component 40 and is provided with a limiting groove 431;

[0085] The slide plate 44 is slidably positioned in the limiting groove 431 and is fixed to the end side of the mold component 40 by bolts;

[0086] The mold cavity is formed by the telescopic plate group, the plurality of mold plates 42 and the two sides of the support frame 45;

[0087] Preferably, when the bottom end of the mold part 40 is horizontal, the length of the lowermost strip hole 41 is the longest;

[0088] The slide plate 44 is provided with a plurality of mounting holes 441;

[0089] The bolt passes through one of the mounting holes 441 and the strip hole 41 and then is threadedly mounted with a nut to fix the slide plate 44 on the mold component 40;

[0090] Specifically, a pair of telescopic plate groups are located at the bottom end of the support frame 45 and arranged front to back, and a plurality of mold plates 42 are located above the telescopic plate groups and increase successively, that is, the telescopic plate group, the plurality of mold plates 42 and both sides of the support frame 45 together form the mold cavity;

[0091] When paving multiple strata or coal seams, fixing multiple mold plates 42 by bolts will reduce efficiency. Therefore, a telescopic plate group can be provided at the bottom of the support frame 45. The slide plate 44 in the telescopic plate group can move quickly, so that it can be applied to coal seams of a certain thickness. For example, the coal seam at the bottom is relatively fixed, and the mold cavity is formed directly by moving the slide plate 44. In this way, a large number of mold plates 42 can be avoided from being disassembled and assembled, and the coal seam in the experiment can be quickly paved, avoiding the cumbersome operation caused by the continuous installation of bolts.

[0092] Initially, when the bottom end of the mold component 40 is horizontal, the length of the strip hole 41 at the bottom is the longest to match the positioning of the slide plate 44 in the moving state, and the length of the strip holes 41 at other positions is relatively short to match the installation of the mold plate 42 in other situations;

[0093] The fixing plate 43 is mounted on the mold component 40 by bolts, for example, the bolts are located on the left and right sides of the support frame 45, and the limiting grooves 431 on the fixing plate 43 can ensure the normal movement of the slide plate 44;

[0094] The slide plate 44 is laid flat on the end side of the support frame 45 and closes the mold component 40 without affecting the rotation of the annular frame 20. The plurality of mounting holes 441 thereon are arranged at intervals, and the corresponding mounting holes 441 can be selected for fixing according to the extended height of the slide plate 44;

[0095] The slide plate 44 slides relative to the fixed plate 43. When it slides to a certain position, a bolt passes through one of the mounting holes 441 and the strip hole 41 and a nut is threadedly installed to fix the slide plate 44 on the mold component 40. When a paving is completed, the bolt can be slightly loosened, the slide plate 44 is moved to another position, and then the bolt is tightened to achieve rapid paving of the coal seam in the experiment. It is explained that the length of the lowest strip hole 41 determines the movement of the slide plate 44, and the other strip holes 41 are used to fine-tune the position of the mold plate 42. The telescopic plate group is used in combination with the mold plate 42.

[0096] In some examples of the present invention, Figures 1 to 3 As shown, the adjusting wheel set 50 includes:

[0097] A roller assembly, rotatably mounted on the adjustment plate 52;

[0098] The main support frame 10 is provided with a plurality of support wheels 11 for limiting the end sides of the annular frame 20 .

[0099] Specifically, the support wheels 11 are symmetrically located on both sides of the middle of the supporting main frame 10, and the end sides of the annular frame 20 are limited front and rear. There are multiple support wheels 11, which are arranged according to the installation position of the annular frame 20, so that the annular frame 20 is vertically located on the adjusting wheel group 50 and the rotation of the annular frame 20 is guaranteed. That is to say, the stability of the circumferential rotation of the annular frame 20 is guaranteed by the support of the adjusting wheel group 50 and the limitation of the support wheels 11;

[0100] In some examples of the present invention, Figure 1 , Figure 4 As shown, the adjusting wheel set 50 is a pair and is symmetrically arranged at the lower end of the supporting main frame 10;

[0101] The roller assembly comprises:

[0102] The axis positions of the first roller 53, the second roller 54 and the third roller 55 are connected to form an obtuse angle;

[0103] The second roller 54 located in the middle is connected to the driving assembly 60, and the first roller 53 and the third roller 55 are tangent to and connected to the circumference of the annular frame 20;

[0104] The first transmission belt 56 and the second transmission belt 57 are used to rotate the first roller 53, the second roller 54 and the third roller 55 at the same speed and in the same direction. The first transmission belt 56 is wound around the end sides of the first roller 53 and the second roller 54, and the second transmission belt 57 is wound around the end sides of the second roller 54 and the third roller 55;

[0105] Specifically, the first roller 53, the second roller 54, and the third roller 55 can adopt the same specifications, and the first transmission belt 56 and the second transmission belt 57 can adopt the same specifications, wherein the second roller 54 is used to adjust the rotation of the plate 52 and the power input, and the first roller 53 and the third roller 55 are used to receive the annular frame 20 and output the power; the end sides of the first roller 53, the second roller 54, and the third roller 55 can be provided with guide wheels for winding the corresponding transmission belts;

[0106] The drive assembly 60 may be a servo motor connected to the controller, and the servo motors corresponding to the pair of adjustment wheel assemblies 50 act synchronously;

[0107] When the mold component 40 is adjusted to an inclination angle, the driving assembly 60 drives the second roller 54 to rotate, and drives the first roller 53 and the third roller 55 to rotate at the same speed and in the same direction through the first transmission belt 56 and the second transmission belt 57. The first roller 53 and the third roller 55 are in contact with the circumference of the annular frame 20, thereby driving the annular frame 20 to rotate and ensuring sufficient driving force for the annular frame 20.

[0108] In some examples of the present invention, Figure 4 As shown, the adjustment plate 52 is rotatably mounted on the base 51 with the axis of the second roller 54 as the center;

[0109] The adjusting wheel set 50 further includes:

[0110] The limiting rod 58 is threadedly connected to the base 51 , and the upper end thereof is in contact with the adjusting plate 52 .

[0111] Specifically, the adjustment plate 52 is rotatably located on the base 51. Preferably, the adjustment plate 52 is a pair arranged front and back, and a plate is connected to the lower end. The front and rear gaps of the pair of adjustment plates 52 are greater than the front and rear widths of the annular frame 20, so as to ensure that the roller group can bear the annular frame 20.

[0112] When the annular frame 20 is placed on a pair of adjusting wheel groups 50, the adjusting rod 52 can be rotated and adjusted according to the force, so that the roller group can adapt to the annular frame 20 to reasonably distribute the gravity of the annular frame 20 and ensure the overall balance;

[0113] The limiting rod 58 is installed on the base 51 and can be lifted and lowered. Preferably, the limiting rod 58 is close to the center of the annular frame 20 and is used to limit the rotation angle of the adjustment plate 52 to prevent the adjustment plate 52 from rotating at a larger angle.

[0114] In some examples of the present invention, the adjusting wheel set 50 is a pair and is symmetrically arranged at the lower end of the supporting main frame 10;

[0115] One of the adjusting wheel sets 50 also includes:

[0116] The gear and the ring gear are coaxially mounted on the inner side of the annular frame 20 and meshed with the gear;

[0117] The gear is rotatably mounted on the adjustment plate 52 and connected to the drive assembly 60;

[0118] Specifically, the driving assembly 60 is a servo motor connected to the controller, and the operator inputs corresponding commands through the controller to control the start and stop, forward and reverse rotation, and speed of the servo motor; the roller group is used to receive the annular frame 20, including a plurality of rollers rotating on the adjustment plate 52, and the position of the rollers matches the peripheral side of the annular frame 20;

[0119] The gear ring is fixed to the inner ring of the annular frame 20 by bolts. When the servo motor is started, the output end drives the gear to rotate, and the gear meshes with the gear ring, thereby driving the annular frame 20 to rotate through the gear ring.

[0120] In this example, the annular frame 20 is driven to rotate by meshing the gears with the gear ring, so that the rotation angle of the annular frame 20 can be accurately adjusted to avoid the problem of slipping when the annular frame 20 is heavy.

[0121] The present invention relates to a coal seam similarity simulation experimental method, which specifically comprises the following steps:

[0122] S1, initial state, the bottom end of the mold component 40 is horizontal;

[0123] S2, according to the coal seam simulation experiment parameters, different strata and coal seams are laid in layers in the mold cavity as required;

[0124] A plurality of mold plates 42 are spaced front and back and connected one by one to the support frame 45 from bottom to top, so that a mold cavity for paving the coal seam model is formed between the front and rear mold plates 42 and the mold component 40; when different strata and coal seams are layered in the mold cavity as required, the mold plates 42 can be gradually installed to facilitate the loading component to load stress on each coal seam;

[0125] S3, when the laying is completed, the loading component presses on the mold component 40, and the output end acts on the laid coal seam; or when each coal seam is laid, the loading component is used to load stress to complete the first laying;

[0126] S4, when the model is relatively stable, the angle is adjusted according to the simulated formation dip;

[0127] The driving assembly 60 is activated, so that the annular frame 20 rotates under the circumferential support of the adjusting wheel assembly 50, and when the desired angle is reached, the annular frame 20 stops rotating;

[0128] The corresponding coal seam is then laid, and stress can be loaded through the loading component to complete the second laying. The exemplary implementation of a coal seam similarity simulation experimental device proposed by the present invention is described in detail above with reference to the preferred embodiment. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and changes can be made to the above-mentioned specific embodiments, and various technical features and structures proposed by the present invention can be combined in various ways without exceeding the protection scope of the present invention, which is determined by the attached claims.

Claims

1. A coal seam similarity simulation experimental device, characterized in that: include: Supporting main frame (10); An annular frame (20) is rotatably connected inside the supporting main frame (10); At least one adjusting wheel set (50), mounted on the supporting main frame (10) and in contact with the circumferential side of the annular frame (20), and configured to drive the annular frame (20) supported by it to rotate in a circumferential direction; A mold component (40) is connected to the annular frame (20) via a fixed truss (30), and the mold component (40) has a mold cavity for paving the coal seam model in layers; A loading component configured to apply a loading force to the coal seam model; The mold component (40) includes a support frame (45) and a plurality of mold plates (42); A plurality of mold plates (42) are connected to both sides of the support frame (45) to form the mold cavity; The support frame (45) is a rectangular frame, and the side length is provided with a plurality of strip-shaped holes (41) arranged along the length direction; The bolts are passed through the through holes and the strip holes (41) on both sides of the mold plate (42) and then threaded with nuts to fix the mold plate (42) on the mold component (40); The mold component (40) further includes a telescopic plate group, which includes: A fixing plate (43) fixed to the bottom end of the mold component (40), the fixing plate (43) having a limiting groove (431); A slide plate (44) slidably disposed in the limiting groove (431) and fixed to the end side of the mold component (40); The mold cavity is formed by the telescopic plate group, the plurality of mold plates (42) and the two sides of the support frame (45); When the bottom end of the mold part (40) is horizontal, the strip-shaped hole (41) at the bottom is the longest; The slide plate (44) is provided with a plurality of mounting holes (441); A bolt is passed through one of the mounting holes (441) and the lowermost strip hole (41) and then threaded with a nut to fix the slide plate (44) on the mold component (40); The adjusting wheel set (50) comprises: A roller assembly rotatably mounted on the adjustment plate (52); A plurality of support wheels (11) for limiting the end sides of the annular frame (20) are provided on the supporting main frame (10).

2. A coal seam similarity simulation experimental device according to claim 1, characterized in that: The adjusting wheel set (50) is a pair and is symmetrically arranged at the lower end of the supporting main frame (10); The roller assembly comprises: The first roller (53), the second roller (54), and the third roller (55) have their axis centers connected at an obtuse angle; The second roller (54) located in the middle is connected to the driving assembly (60), and the first roller (53) and the third roller (55) are tangent to and connected to the circumference of the annular frame (20); The first transmission belt (56) and the second transmission belt (57) are used to rotate the first roller (53), the second roller (54) and the third roller (55) at the same speed and in the same direction. The first transmission belt (56) is wound around the end sides of the first roller (53) and the second roller (54), and the second transmission belt (57) is wound around the end sides of the second roller (54) and the third roller (55).

3. A coal seam similarity simulation experimental device according to claim 2, characterized in that: The adjustment plate (52) is rotatably mounted on the base (51) around the axis of the second roller (54); The adjusting wheel assembly (50) further comprises: The limiting rod (58) is threadedly connected to the base (51), and the upper end thereof is in contact with the adjusting plate (52).

4. A coal seam similarity simulation experimental device according to any one of claims 1 to 3, characterized in that: When the bottom end of the mold component (40) is horizontal, the vertical center of the mold component (40), the vertical center of the annular frame (20), and the vertical center of the supporting main frame (10) coincide with each other.

5. A coal seam similarity simulation experiment method using the coal seam similarity simulation experiment device according to claim 1, characterized in that: The specific steps include: S1, initial state, the bottom end of the mold component (40) is horizontal; S2, according to the coal seam simulation experiment parameters, different strata and coal seams are laid in layers in the mold cavity as required; A plurality of mold plates (42) are spaced front and back and connected one by one to a support frame (45) from bottom to top, so that a mold cavity for paving a coal seam model is formed between the front and rear mold plates (42) and the mold component (40); when different strata and coal seams are layered in the mold cavity as required, the mold plates (42) can be gradually installed to facilitate the loading component to load stress on each coal seam; S3, when the laying is completed, the loading component presses against the mold component (40) and the output end acts on the laid coal seam; or when each coal seam is laid, the loading component is used to load stress to complete the first laying; S4, when the model is relatively stable, the angle is adjusted according to the simulated formation dip; The annular frame (20) is driven to rotate, so that the annular frame (20) rotates under the action of the circumferential support of the adjusting wheel group (50), and when the required angle is reached, the annular frame (20) stops rotating; the corresponding coal seam is then laid, and stress can be loaded through the loading component to complete the second laying.

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