A model structure for mining subsidence prediction

Abstract

The utility model relates to mining subsidence model technical field, and disclose a kind of model structure of mining subsidence prediction, including model box, the inner wall of model box is respectively provided with guide slot and first sliding slot, the inner chamber of model box is respectively provided with hard roof module, weak interlayer module, coal seam module, fault zone module and aquifer module, by pressing unlocking lever drive connecting rod along second sliding slot sliding, drive second male plug exit second slot action, in this process, second spring is compressed and releases elastic potential energy, the locking constraint of first male plug is removed, so that its positioning block can smoothly slide along guide slot, and then realize hard roof module, weak interlayer module, coal seam module, fault zone module and aquifer module's quick disassembly and flexible combination, to guarantee the accuracy of different geologic sequence simulation and build efficiency, and then realize the complex scene of superposition combination, further improve the convenience and flexibility of geological model construction.

Description

Technical Field

[0001] This utility model relates to the field of mining-induced subsidence model technology, specifically a model structure for predicting mining-induced subsidence. Background Technology

[0002] In the context of mining-induced subsidence prediction models, a model is a tool or methodology system that uses mathematical, physical, or computer simulation methods to describe, analyze, and predict surface subsidence phenomena caused by underground mining activities. It integrates multiple factors that influence mining-induced subsidence in order to predict surface movement and deformation.

[0003] Existing physical models are typically constructed or fixed as a whole, with integrated rock strata modules. This makes it impossible to flexibly disassemble and reassemble them according to different geological conditions. When it is necessary to simulate different rock strata sequences, fault locations, or aquifer distributions, the entire model must be rebuilt, which is time-consuming, labor-intensive, and results in significant material waste and high experimental costs. Therefore, this may limit the flexibility and practicality of mining-induced subsidence prediction experiments. As a result, we have introduced a model structure for mining-induced subsidence prediction. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a model structure for predicting mining-induced subsidence, which has the advantages of easy assembly to adapt to different geological simulation needs and material subsidence simulation during operation, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a model structure for predicting mining-induced subsidence, including a model box body. The inner wall of the model box body is provided with a guide groove and a first sliding groove. The inner cavity of the model box body is provided with a hard roof module, a weak interlayer module, a coal seam module, a fault zone module, and an aquifer module. The inner wall of the hard roof module of the model box body is provided with a sealing component. The side wall of the hard roof module is fixedly installed with a positioning block. The inner wall of the positioning block is provided with a disassembly and assembly component.

[0006] As a preferred technical solution of this utility model: the inner walls of the hard roof module, the weak interlayer module, the coal seam module, the fault zone module, and the aquifer module are all provided with grids. The inner cavity of the grid of the hard roof module is filled with sand and gypsum, the inner cavity of the grid of the weak interlayer module is filled with sand and clay, the inner cavity of the grid of the coal seam module is filled with foamed plastic particles, and the inner cavity of the grid of the fault zone module is filled with loose sand and gravel. The number of positioning blocks and disassembly components is ten each, and they are arranged in pairs on both outer walls of the hard roof module, the weak interlayer module, the coal seam module, the fault zone module, and the aquifer module. The outer wall of the positioning block is slidably fitted to the inner wall of the guide groove. The number of sealing components is nine, and they are arranged in groups of three at the bottom of the grid of the hard roof module, the weak interlayer module, the coal seam module, and the fault zone module.

[0007] As a preferred technical solution of this utility model: the sealing assembly includes a sealing frame installed at the bottom of a rigid top plate module, a magnetic frame embedded in the inner wall of the sealing frame, a pull bar provided at the bottom of the rigid top plate module, a lead screw rotatably connected to the inner wall of the rigid top plate module, a sealing plate installed at the top of the pull bar, a magnetic plate embedded in the inner wall of the sealing plate, a slider fixedly installed on the outer wall of the pull bar, and a knob fixedly sleeved on the outer wall of the lead screw away from the slider.

[0008] As a preferred technical solution of this utility model: the bottom of the sealing frame is correspondingly arranged with the top of the sealing plate, the bottom of the magnetic frame and the top of the magnetic plate with the un-embedded side are respectively the S and N poles, and are magnetically attracted to each other, the inner wall of the slider is provided with threads, and the threads are interlocked with the outer wall of the lead screw, and the outer wall of the slider is in contact with the inner wall of the first sliding groove and slides.

[0009] As a preferred technical solution of this utility model: the disassembly and assembly component includes a first circular groove opened in the inner wall of the positioning block, a first slot opened in the inner wall of the guide groove, a second circular groove, a second sliding groove and a third circular groove opened in the inner wall of the model box, a connector provided in the inner wall of the model box, the connector including a first spring disposed in the inner cavity of the first circular groove, a first convex pin slidably connected to the inner wall of the first circular groove, a second slot opened in the inner wall of the first convex pin, a second convex pin slidably connected to the inner wall of the second circular groove, a second spring disposed in the inner cavity of the second circular groove, a connecting rod slidably connected to the inner wall of the second sliding groove, and an unlocking rod slidably connected to the inner wall of the third circular groove.

[0010] As a preferred technical solution of this utility model: the first spring is located on one side of the first convex pin, with one end overlapping the outer wall of the first convex pin and the other end overlapping the inner wall of the first circular groove. The end of the first convex pin away from the first spring is spherical, and the outer wall of the spherical end is adapted to the shape of the inner wall of the first slot. The second spring is located on one side of the second convex pin, with one end overlapping the outer wall of the second convex pin and the other end overlapping the inner wall of the second circular groove. The outer wall of the end of the second convex pin away from the second spring is inclined, and the outer wall of the inclined end is slidably fitted to the outer wall of the spherical end of the first convex pin. The outer wall of the inclined end of the second convex pin is adapted to the shape of the inner wall of the second slot. One end of the connecting rod is connected and fixed to the side wall of the second convex pin, and the other end is connected and fixed to the side wall of the unlocking rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The model structure for predicting mining-induced subsidence uses a mechanism where pressing the unlocking rod drives the connecting rod to slide along the second slide groove, causing the second convex pin to exit the second slot. During this process, the second spring is compressed, releasing its elastic potential energy and releasing the locking constraint of the first convex pin, allowing its positioning block to slide smoothly along the guide groove. This enables the rapid assembly and flexible combination of modules such as the hard roof module, weak interlayer module, coal seam module, fault zone module, and aquifer module, ensuring the accuracy and efficiency of simulating different geological sequences. It also enables complex scenarios involving superimposed combinations, further enhancing the convenience and flexibility of geological model construction.

[0012] 2. The model structure for predicting mining-induced subsidence utilizes the attraction of opposite poles of the magnetic frame and magnetic plate to drive the sealing plate to fit tightly against the sealing frame. This causes the mating surface to undergo micro-elastic deformation. During this process, the deformed portion fills the gap between the two, sealing and constraining the filling material inside the grid cavities of the hard roof module, weak interlayer module, coal seam module, fault zone module, and aquifer module, ensuring a stable specific ratio and thus guaranteeing the simulation of the physical and mechanical characteristics of the rock strata. Simultaneously, the rotating knob drives the lead screw to rotate, which in turn drives the slider and pull bar to move along the first sliding groove, enabling the sealing plate to open and close rapidly. This allows the foam particles of the coal seam module to fall naturally during the goaf simulation, further improving the continuity and ease of operation of the mining simulation process. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the model box structure of this utility model; Figure 3 This is a schematic diagram of the module structure of this utility model; Figure 4This is a schematic diagram of the sealing assembly structure of this utility model; Figure 5 This is a schematic diagram of the rock strata sorting structure of this utility model; Figure 6 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 7 This utility model Figure 4 Enlarged structural diagram at point B.

[0014] In the diagram: 1. Model box; 2. Guide groove; 3. First slide groove; 4. Hard roof module; 5. Soft interlayer module; 6. Coal seam module; 7. Fault zone module; 8. Aquifer module; 9. Sealing component; 10. Positioning block; 11. Assembly / disassembly component; 901. Sealing frame; 902. Magnetic frame; 903. Lead screw; 904. Pull bar; 905. Sealing plate; 906. Magnetic plate; 907. Slider; 908. Rotary knob; 111. First circular groove; 112. First slot; 113. Second circular groove; 114. Second slide groove; 115. Third circular groove; 116. Connector; 1161. First spring; 1162. First convex pin; 1163. Second slot; 1164. Second convex pin; 1165. Second spring; 1166. Connecting rod; 1167. Unlocking rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 - Figure 7 A model structure for predicting mining-induced subsidence includes a model box 1. The inner wall of the model box 1 is provided with a guide groove 2 and a first sliding groove 3. The inner cavity of the model box 1 is provided with a hard roof module 4, a soft interlayer module 5, a coal seam module 6, a fault zone module 7 and an aquifer module 8. The inner wall of the hard roof module 4 of the model box 1 is provided with a sealing component 9. The side wall of the hard roof module 4 is fixedly installed with a positioning block 10. The inner wall of the positioning block 10 is provided with a disassembly and assembly component 11. In the above structure, the rigid roof module 4, the weak interlayer module 5, the coal seam module 6, and the fault zone module 7 are filled with a specific ratio of similar materials to simulate the physical force characteristics of the corresponding rock layers in real strata. After the four rigid roof modules 4, weak interlayer modules 5, coal seam modules 6, fault zone modules 7 and aquifer modules 8 are orderly combined in the model box 1, a physical model similar to the actual geological and mining conditions on site can be quickly constructed in the laboratory. Then, it can be observed through the model box 1 made of acrylic material to observe its surface subsidence characteristics.

[0017] In a preferred embodiment: the inner walls of the hard roof module 4, the weak interlayer module 5, the coal seam module 6, the fault zone module 7, and the aquifer module 8 are all provided with grids. The grid cavity of the hard roof module 4 is filled with sand and gypsum. The grid cavity of the weak interlayer module 5 is filled with sand and clay. The grid cavity of the coal seam module 6 is filled with foam plastic particles. The grid cavity of the fault zone module 7 is filled with loose sand and gravel. There are ten positioning blocks 10 and ten disassembly components 11, and they are arranged in pairs on both outer walls of the hard roof module 4, the weak interlayer module 5, the coal seam module 6, the fault zone module 7, and the aquifer module 8. The outer wall of the positioning block 10 is slidably fitted to the inner wall of the guide groove 2. There are nine sealing components 9, and they are arranged in groups of three on the bottom of the grids of the hard roof module 4, the weak interlayer module 5, the coal seam module 6, and the fault zone module 7. In the above structure, the sand and gypsum mixture filling the inner cavity of the hard roof module 4 grid simulates high strength and brittleness in sequence. Next, the sand and clay mixture filling the inner cavity of the soft interlayer module 5 grid simulates low strength and plastic rock strata in sequence. At the same time, the foamed plastic particles filling the inner cavity of the coal seam module 6 grid simulate easily mined coal seam materials. Finally, the loose sand and gravel filling the inner cavity of the fault zone module 7 grid simulates the mechanical properties of the fracture zone. Furthermore, by setting a set of positioning blocks 10 on both sides of each hard roof module 4, soft interlayer module 5, coal seam module 6, fault zone module 7 and aquifer module 8 to form a sliding fit with the guide groove 2, and by setting corresponding sealing components 9 at the bottom of the hard roof module 4, soft interlayer module 5, coal seam module 6 and fault zone module 7 grids in a distribution of three in each group, the uniformity of the bottom sealing is ensured.

[0018] In a preferred embodiment: the sealing assembly 9 includes a sealing frame 901 mounted on the bottom of the rigid top plate module 4, a magnetic frame 902 embedded in the inner wall of the sealing frame 901, a pull bar 904 provided at the bottom of the rigid top plate module 4, a lead screw 903 rotatably connected to the inner wall of the rigid top plate module 4, a sealing plate 905 mounted on the top of the pull bar 904, a magnetic plate 906 embedded in the inner wall of the sealing plate 905, a slider 907 fixedly mounted on the outer wall of the pull bar 904, and a knob 908 fixedly sleeved on the outer wall of the end of the lead screw 903 away from the slider 907; In a preferred embodiment: the bottom of the sealing frame 901 is correspondingly disposed to the top of the sealing plate 905, the bottom of the magnetic frame 902 and the top of the magnetic plate 906 with the un-embedded side are the S and N poles respectively, and are magnetically attracted to each other, the inner wall of the slider 907 is provided with threads, and the threads are interlocked with the outer wall of the lead screw 903, and the outer wall of the slider 907 is in contact with the inner wall of the first sliding groove 3 and slides. In the above structure, when the sealing plate 905 and the sealing frame 901 are attached, the magnetic fields of the magnetic frame 902 and the magnetic plate 906 cause deformation at the point of contact. This deformation fills the gap between the two parts, preventing leakage of the filling material in the cavities of the hard roof module 4, the weak interlayer module 5, the coal seam module 6, and the fault zone module 7. Simultaneously, the corresponding knob 908 needs to be rotated, causing the screw 903 to rotate. The rotating lead screw 903 will drive its slider 907 to slide along the inner wall of the first groove 3, causing the pull bar 904 to move with the slider 907, which will open the bottom of the corresponding grid. This will cause the foam particles filling the inner cavity of the coal seam module 6 grid to fall off under the action of gravity, forming a goaf. After the materials filling the inner cavity of the hard roof module 4 and the weak interlayer module 5 grid lose their support, the stress redistribution, movement and fracture process inside can be observed through their model box 1.

[0019] In a preferred embodiment: the disassembly assembly 11 includes a first circular groove 111 opened in the inner wall of the positioning block 10, a first slot 112 opened in the inner wall of the guide groove 2, a second circular groove 113, a second sliding groove 114 and a third circular groove 115 opened in the inner wall of the model box 1, and a connector 116 provided in the inner wall of the model box 1. The connector 116 includes a first spring 1161 disposed in the inner cavity of the first circular groove 111, a first convex pin 1162 slidably connected to the inner wall of the first circular groove 111, a second slot 1163 opened in the inner wall of the first convex pin 1162, a second convex pin 1164 slidably connected to the inner wall of the second circular groove 113, a second spring 1165 disposed in the inner cavity of the second circular groove 113, a connecting rod 1166 slidably connected to the inner wall of the second sliding groove 114, and an unlocking rod 1167 slidably connected to the inner wall of the third circular groove 115. In a preferred embodiment: the first spring 1161 is located on one side of the first convex pin 1162, with one end overlapping the outer wall of the first convex pin 1162 and the other end overlapping the inner wall of the first circular groove 111. The end of the first convex pin 1162 away from the first spring 1161 is spherical, and the outer wall of the spherical end is adapted to the shape of the inner wall of the first groove 112. The second spring 1165 is located on one side of the second convex pin 1164, with one end overlapping the outer wall of the second convex pin 1164. The first convex pin 1164 has one end overlapping with the second convex pin 1165, and the other end overlaps with the inner wall of the second circular groove 113. The outer wall of the second convex pin 1164 away from the second spring 1165 is shaped as an inclined surface, and the outer wall of the inclined end is slidably fitted to the outer wall of the spherical end of the first convex pin 1162. The outer wall of the inclined end of the second convex pin 1164 is adapted to the shape of the inner wall of the second slot 1163. One end of the connecting rod 1166 is connected and fixed to the side wall of the second convex pin 1164, and the other end is connected and fixed to the side wall of the unlocking rod 1167. In the above structure, by pressing the unlocking rod 1167, the unlocking rod 1167 slides along the inner wall of the third circular groove 115, which simultaneously drives the connecting rod 1166 to slide along the inner wall of the second sliding groove 114. This causes the second convex pin 1164, which is fixed to the other end of the connecting rod 1166, to be driven, and the inclined end of the second convex pin 1164 will correspondingly exit the inner cavity of the second slot 1163. When the second convex pin 1164 slides along the inner wall of the second circular groove 113, it drives the second convex pin 1164 to be compressed. When the second convex pin 1164 exits the inner cavity of the second slot 1163, it slides upwards through the corresponding hard roof module 4, soft interlayer module 5, coal seam module 6, fault zone module 7, and containing The water layer module 8 causes the positioning block 10 to slide along the inner wall of the guide groove 2. This causes the spherical end of the first convex pin 1162 in the inner cavity of the first circular groove 111 to be squeezed out of the inner wall of the first slot 112 and come into contact with the inner wall of the guide groove 2. The other end of the first convex pin 1162 slides along the inner wall of the first circular groove 111 and drives the first spring 1161 to be compressed until the positioning block 10 slides out of the inner wall of the guide groove 2. Then, the unlocking rod 1167, the connecting rod 1166 and the second convex pin 1164 are reset by the rebound of the second spring 1165. At the same time, the first convex pin 1162 is reset by the rebound of the first spring 1161, which facilitates its disassembly and assembly and quick combination, thereby simulating different geological sequences.

[0020] Working principle: First, the simulation of actual mining is achieved by filling the inner cavity of the grid with similar materials from the hard roof module 4, weak interlayer module 5, coal seam module 6, and fault zone module 7. This allows for the construction of a model in the laboratory that closely resembles actual geological mining conditions. Then, the surface subsidence characteristics of the mining simulation are observed through the acrylic model box 1. The hard roof module 4, weak interlayer module 5, coal seam module 6, fault zone module 7, and aquifer module 8 are oriented according to their respective bottom order and slid into the inner cavity of the model box 1 via their positioning blocks 10. When the inner wall of groove 2 slides, the spherical end of the first convex pin 1162 first contacts the inner wall of the guide groove 2, causing the other end of the first convex pin 1162 to slide along the inner wall of the first circular groove 111. This sliding causes the first spring 1161 to be compressed. When the spherical end of the first convex pin 1162 corresponds to the first slot 112, the spherical end of the first convex pin 1162 is inserted into the inner cavity of the first slot 112 by the springback of the first spring 1161. During the insertion process, the spherical end of the first convex pin 1162 first contacts the inclined end of the second convex pin 1164, thereby pressing the inclined end. The second convex pin 1164 passes through the inclined surface and the spherical surface. The compression guides the sliding along the inner wall of the second circular groove 113, causing the second convex pin 1164 to drive the second spring 1165 to compress during sliding, until the spherical end of the first convex pin 1162 is fully inserted into the inner cavity of the first slot 112, so that the inclined end of the second convex pin 1164 corresponds to the inner wall of the second slot 1163. Then, the second spring 1165 returns to its original position and inserts, thus forming a lock after installation. Then, by pressing the unlocking rod 1167, the unlocking rod 1167 slides along the inner wall of the third circular groove 115, which simultaneously drives the connecting rod 1166 to slide along the inner wall of the second sliding groove 114, so that the other end of the connecting rod 1166 is fixed to the second convex pin 1162. 64 will be driven by it, causing the inclined end of its second convex pin 1164 to exit the inner cavity of the second slot 1163 accordingly. When the second convex pin 1164 slides along the inner wall of the second circular groove 113, it will be compressed. When the second convex pin 1164 exits the inner cavity of the second slot 1163, it will slide upwards through its corresponding hard top plate module 4, soft interlayer module 5, coal seam module 6, fault zone module 7, and aquifer module 8, causing the positioning block 10 to slide along the inner wall of the guide groove 2. The spherical end of the first convex pin 1162 in the inner cavity of the first circular groove 111 will be squeezed out of the inner wall of the first slot 112 by its outer wall and come into contact with the inner wall of the guide groove 2.The other end of the first convex pin 1162 slides along the inner wall of the first circular groove 111 and compresses the first spring 1161 until the positioning block 10 slides out of the inner wall of the guide groove 2. Then, the unlocking rod 1167, the connecting rod 1166, and the second convex pin 1164 are reset by the rebound of the second spring 1165. At the same time, the first convex pin 1162 is reset by the rebound of the first spring 1161, which facilitates its quick assembly and disassembly to simulate different geological sequences. Secondly, when the sealing plate 905 and the sealing frame 901 are attached, the two are deformed at the joint under the pressure of the magnetic fields of the magnetic frame 902 and the magnetic plate 906. The deformation will fill the gap between the two, thereby preventing the hard top plate from molding. Leakage occurs in the filling material within the cavities of Block 4, the weak interlayer module 5, the coal seam module 6, and the fault zone module 7. Simultaneously, the corresponding knob 908 needs to be rotated, causing the screw 903 to rotate. This rotation of the screw 903 causes the slider 907 to slide along the inner wall of the first groove 3. The pull bar 904 displaces with the slider 907, opening the bottom of the corresponding grid. This allows the foam particles filling the grid cavity of the coal seam module 6 to fall under gravity, forming a goaf. Consequently, the sand-gypsum mixture and sand-clay filling the grid cavities of the hard roof module 4 and the weak interlayer module 5, after losing support, undergo stress redistribution, movement, and fracture, resulting in surface subsidence characteristics. This simulates the conditions during mining.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A model structure for predicting mining-induced subsidence, comprising a model housing (1), characterized in that: The inner wall of the model box (1) is provided with guide groove (2) and first sliding groove (3). The inner cavity of the model box (1) is provided with hard roof module (4), soft interlayer module (5), coal seam module (6), fault zone module (7) and aquifer module (8). The inner wall of the hard roof module (4) of the model box (1) is provided with sealing component (9). The side wall of the hard roof module (4) is fixedly installed with positioning block (10). The inner wall of the positioning block (10) is provided with disassembly component (11).

2. The model structure for predicting mining-induced subsidence according to claim 1, characterized in that: The inner walls of the hard roof module (4), the weak interlayer module (5), the coal seam module (6), the fault zone module (7), and the aquifer module (8) are all equipped with grids. The grid cavity of the hard roof module (4) is filled with sand and gypsum, the grid cavity of the weak interlayer module (5) is filled with sand and clay, the grid cavity of the coal seam module (6) is filled with foamed plastic particles, and the grid cavity of the fault zone module (7) is filled with loose sand and gravel. The number of positioning blocks (10) and disassembly / assembly components (11) are respectively Ten, and two are respectively set on the outer walls of the hard roof module (4), soft interlayer module (5), coal seam module (6), fault zone module (7) and aquifer module (8). The outer wall of the positioning block (10) is slidably fitted to the inner wall of the guide groove (2). There are nine sealing components (9), and three sealing components (9) are respectively set on the bottom of the grid of the hard roof module (4), soft interlayer module (5), coal seam module (6) and fault zone module (7).

3. The model structure for predicting mining-induced subsidence according to claim 1, characterized in that: The sealing assembly (9) includes a sealing frame (901) installed at the bottom of the rigid top plate module (4), a magnetic frame (902) embedded in the inner wall of the sealing frame (901), a pull bar (904) provided at the bottom of the rigid top plate module (4), a lead screw (903) rotatably connected to the inner wall of the rigid top plate module (4), a sealing plate (905) installed at the top of the pull bar (904), a magnetic plate (906) embedded in the inner wall of the sealing plate (905), a slider (907) fixedly installed on the outer wall of the pull bar (904), and a knob (908) fixedly sleeved on the outer wall of the end of the lead screw (903) away from the slider (907).

4. The model structure for predicting mining-induced subsidence according to claim 3, characterized in that: The bottom of the sealing frame (901) is correspondingly set to the top of the sealing plate (905). The bottom of the magnetic frame (902) and the top of the magnetic plate (906) are respectively the S and N poles, and they are magnetically attracted to each other. The inner wall of the slider (907) is provided with threads, and the threads are interlocked with the outer wall of the lead screw (903). The outer wall of the slider (907) is in close contact with the inner wall of the first sliding groove (3) and slides.

5. The model structure for predicting mining-induced subsidence according to claim 1, characterized in that: The disassembly and assembly assembly (11) includes a first circular groove (111) on the inner wall of the positioning block (10), a first slot (112) on the inner wall of the guide groove (2), a second circular groove (113), a second sliding groove (114) and a third circular groove (115) on the inner wall of the model box (1), and a connector (116) on the inner wall of the model box (1). The connector (116) includes a first spring (1161) disposed in the inner cavity of the first circular groove (111). The inner wall of the groove (111) is slidably connected to a first convex pin (1162), the inner wall of the first convex pin (1162) is provided with a second slot (1163), the inner wall of the second circular groove (113) is slidably connected to a second convex pin (1164), the inner cavity of the second circular groove (113) is provided with a second spring (1165), the inner wall of the second sliding groove (114) is slidably connected to a connecting rod (1166), and the inner wall of the third circular groove (115) is slidably connected to an unlocking rod (1167).

6. The model structure for predicting mining-induced subsidence according to claim 5, characterized in that: The first spring (1161) is located on one side of the first convex pin (1162), with one end overlapping the outer wall of the first convex pin (1162) and the other end overlapping the inner wall of the first circular groove (111). The end of the first convex pin (1162) away from the first spring (1161) is spherical, and the outer wall of the spherical end is adapted to the shape of the inner wall of the first slot (112). The second spring (1165) is located on one side of the second convex pin (1164), with one end overlapping the outer wall of the second convex pin (1164). The other end overlaps with the inner wall of the second circular groove (113). The outer wall of the second convex pin (1164) away from the second spring (1165) is shaped as an inclined surface, and the outer wall of the inclined end is slidably fitted to the outer wall of the spherical end of the first convex pin (1162). The outer wall of the inclined end of the second convex pin (1164) is adapted to the shape of the inner wall of the second slot (1163). One end of the connecting rod (1166) is connected and fixed to the side wall of the second convex pin (1164), and the other end is connected and fixed to the side wall of the unlocking rod (1167).

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