A coal seam module refined excavation system in a three-dimensional simulation test

Abstract

The present invention discloses a coal seam module refined excavation system in a three-dimensional simulation test, comprising: a plurality of simulated coal blocks, the plurality of simulated coal blocks forming a simulated coal seam; a plurality of electric support modules, each of which is arranged at the bottom of a simulated coal block, and the electric support module is lifted and lowered to drive the simulated coal block to move; a control module, the output end of which is connected to the controlled end of the electric support module, the control module determines the height of each simulated coal block according to a preset excavation surface, determines the height of each electric support module according to the height of each simulated coal block, and generates a height control instruction according to the height of each electric support module; the control module sends the height control instruction of each electric support module to the corresponding electric support module to control the electric support module to be lifted and lowered to the corresponding height. This solution improves the stability of the system and the accuracy of the simulation results through the precise control of the electric support module by the control module.

Description

Technical Field

[0001] The invention relates to the field of coal mining simulation device design, and in particular to a coal seam module refined excavation system in a three-dimensional simulation test. Background Art

[0002] In the existing coal mining process, coal seam excavation will destroy the original mechanical equilibrium state of the rock mass, causing deformation and movement of the overlying rock strata. As mining progresses, the disturbance will spread to the surface, causing surface subsidence, destroying existing land resources and causing direct or indirect harm to surrounding buildings. In order to grasp the mechanical behavior during excavation, the existing technology proposes a simulation test theory based on similar materials, using sandstone, gelatin, gypsum and other materials to build a model in the laboratory, restore complex geological conditions and apply disturbances similar to those in the project, relying on more accurate monitoring methods and more observation angles in the laboratory than on-site to accurately observe the impact of coal seam excavation on the overlying rock strata and the surface, and obtain the internal law between mining disturbance and surface subsidence, so as to solve practical problems. The existing simulated coal seam excavation device directly divides the coal seam into multiple simulation blocks, and simulates the uneven coal seams under different conditions by adjusting the height of each simulation block. The scene of the coal block being dug out is simulated by lowering the height of the simulation block, and then the changes in the simulated soil and other structures set above the coal seam are observed, so as to deduce the impact of coal seam excavation on the surface soil and other layers.

[0003] However, in the prior art, when adjusting the height of each simulation block, tools are used for manual adjustment, and the disturbance generated will affect all levels, resulting in low accuracy of the test data. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to achieve refined mining when excavating coal seams and improve the recovery rate of coal resources. To this end, the present invention proposes a coal seam module refined excavation system in a three-dimensional simulation test.

[0005] In view of the above technical problems, the present invention provides the following technical solutions:

[0006] The embodiment of the present invention provides a coal seam module refined excavation system in a three-dimensional simulation test, including:

[0007] A plurality of simulated coal blocks, wherein the plurality of simulated coal blocks constitute a simulated coal seam;

[0008] A plurality of electric support modules, each of which is arranged at the bottom of a simulated coal block, and the electric support module is raised and lowered to drive the simulated coal block to move;

[0009] A control module, whose output end is connected to the controlled end of the electric support module, the control module determines the height of each simulated coal block according to a preset excavation surface, determines the height of each electric support module according to the height of each simulated coal block, and generates a height control instruction according to the height of each electric support module; the control module sends the height control instruction of each electric support module to the corresponding electric support module to control the electric support module to rise and fall to the corresponding height.

[0010] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0011] The simulated coal block has a square cross section, and the side length of the square cross section is 10-20 cm; the simulated coal blocks include at least 10 rows, and the number of the simulated coal blocks in each row includes at least 15.

[0012] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0013] The side length of the square cross section is 15 cm; the simulated coal blocks include 14 rows, and the number of the simulated coal blocks in each row includes 20.

[0014] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0015] Each of the electric support modules is provided with a pressure collection unit, and the pressure collection unit is used to detect the pressure value borne by the electric support module and send the pressure value to the control module.

[0016] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0017] Each of the electric support modules comprises:

[0018] A stepper motor, whose controlled end is connected to the output end of the control module, and the stepper motor controls the driving amount of its driving output end according to the height control instruction output by the control module;

[0019] An electric telescopic cylinder connected to the driving output end of the stepping motor;

[0020] An excavation head, one end of which is connected to the telescopic end of the electric telescopic cylinder, and the other end of which is used for fixed connection with the simulated coal block.

[0021] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0022] The pressure collection unit is arranged in the excavation head, and is used for collecting the pressure value applied by the simulated coal block to the excavation head.

[0023] A coal seam module refined excavation system in a three-dimensional simulation test described in some embodiments of the present invention:

[0024] The excavation head comprises an excavation module cover, an excavation module body and a sensor top plate;

[0025] The excavation module body is a rectangular structure, and the bottom of the excavation module body is connected to the telescopic end of the electric telescopic cylinder; the pressure collection unit is arranged on the top of the rectangular structure, and the sensor top plate is arranged on the top of the pressure collection unit. The excavation module cover covers the excavation module body, the pressure collection unit and the sensor top plate inside.

[0026] The coal seam module refined excavation system in the three-dimensional simulation test described in some embodiments of the present invention further includes:

[0027] A transparent box body, a plurality of the simulated coal blocks and a plurality of the electric support modules are all arranged inside the transparent box body.

[0028] The coal seam module refined excavation system in the three-dimensional simulation test described in some embodiments of the present invention further includes:

[0029] The simulated rock and soil layer is arranged on the upper part of the simulated coal seam, and the simulated rock and soil layer includes a plurality of rock and soil layers, and each rock and soil layer is set to a different color.

[0030] The coal seam module refined excavation system in the three-dimensional simulation test described in some embodiments of the present invention further includes:

[0031] A simulated loose layer is arranged above the simulated rock and soil layer;

[0032] A camera is arranged above the simulated loose layer. When the control module controls the electric support module to rise and fall to a corresponding height, the camera collects the surface change state of the simulated loose layer and sends the collected result to the control module.

[0033] The control module is equipped with a display screen, and the display screen is used to display the results collected by the camera.

[0034] The technical solution of the present invention has the following technical effects compared with the prior art:

[0035] The coal seam module refined excavation system in the three-dimensional simulation test provided by the present invention can realize the continuous lifting and lowering of a large number of simulated coal blocks through the precise control of the electric support module by the control module, thereby discretizing the excavation surface and avoiding unnecessary disturbances generated during manual control, thereby improving the stability of the system and the accuracy of the simulation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention, wherein:

[0037] Figure 1 It is a side structural schematic diagram of the coal seam module refined excavation system in the three-dimensional simulation test according to the embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the top surface structure of a simulated coal block in the coal seam module refined excavation system in the three-dimensional simulation test according to the embodiment of the present invention;

[0039] Figure 3 This is a schematic structural diagram of an electric support module according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the structural composition of an electric support module according to an embodiment of the present invention;

[0041] Figure 5 The figure is a schematic diagram of a control flow of a control module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the 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.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] This embodiment provides a coal seam module refined excavation system in a three-dimensional simulation test, such as Figure 1 and Figure 2 As shown, it includes a plurality of simulated coal blocks 101 and a plurality of electric support modules 102, and also includes a control module.

[0047] A plurality of the simulated coal blocks 101 form a simulated coal seam, and each of the electric support modules 102 is arranged at the bottom of a simulated coal block 101, and the electric support module 102 is raised and lowered to drive the simulated coal block 101 to move; the control module, whose output end is connected to the controlled end of the electric support module 102, determines the height of each simulated coal block 101 according to a preset excavation surface, determines the height of each electric support module 102 according to the height of each simulated coal block 101, and generates a height control instruction according to the height of each electric support module 102; the control module sends the height control instruction of each electric support module 102 to the corresponding electric support module 102 to control the electric support module 102 to rise and fall to the corresponding height.

[0048] like Figure 1 The simulated surface layer 200 is arranged above the simulated coal seam, and the simulated surface layer 200 can be used to simulate the surface soil, the loose layer between the surface soil and the simulated coal seam, etc., and can be arranged according to the actual situation. The electric support module 102 is arranged on the support platform 300 . Figure 1 The situation shown in the figure is that all the electric support modules 102 have the same height. In actual implementation, each electric support module 102 can be set according to the coal mining surface to be simulated.

[0049] The above scheme provided in this embodiment can realize the continuous lifting and lowering changes of a large number of simulated coal blocks 101 through the precise control of the electric support module 102 by the control module, thereby discretizing the excavation surface, avoiding unnecessary disturbances generated during manual control, and improving the stability of the system and the accuracy of the simulation results.

[0050] Preferably, the simulated coal block 101 has a square cross-section, and the side length of the square cross-section is 10-20cm; the simulated coal block includes at least 10 rows, and the number of the simulated coal blocks 101 in each row includes at least 15. Furthermore, the side length of the square cross-section is 15cm; the simulation module includes 14 rows, and the number of the simulated coal blocks 101 in each row includes 20. That is, the number of simulated coal blocks 101 includes 280, and each module has a size of 15cm*15cm. In this way, the height variation of 280 or even more simulated coal blocks 101 can be used to simulate the excavation of more complex coal seams, so that refined mining can be achieved when excavating coal seams, ensuring that the recovery rate of coal resources is improved. Combined with Figure 2 From the schematic diagram of the surface structure of the simulated coal seam shown, it can be determined that the above scheme of the present invention discretizes the continuously changing excavation surface shape through a large number of multi-row and multi-column excavation simulations of coal mines, and can truly simulate the actual excavation process.

[0051] In some embodiments, Figure 3 As shown, each of the electric support modules 102 includes:

[0052] The controlled end of the stepper motor 301 is connected to the output end of the control module. The height control instruction output by the control module controls the driving amount of the driving output end of the stepper motor 301.

[0053] The electric telescopic cylinder 302 is connected to the driving output end of the stepping motor 301 .

[0054] An excavation head 303 , one end of which is connected to the telescopic end of the electric telescopic cylinder 302 , and the other end of which is used for fixed connection with the simulated coal block 101 .

[0055] In the initial stage, the height of each electric support module 102 should be consistent with the coal seam surface of the simulated coal mine, that is, the distribution of the initial simulated coal seam surface curve is consistent with the actual curve distribution of the simulated coal seam surface.

[0056] In this process, the control module can store the initial height of each electric support module 102, and can assign a number to each electric support module 102, for example, number each electric support module 102 by row and column number. The height value of the electric support module 102 can be recorded by setting a height value recording table of the electric support module 102. If an excavation plan has been formulated for the coal seam of the coal mine, the preset excavation surface can be determined. For the actual position of the preset excavation surface, the position of the corresponding simulated coal block is determined in the excavation system of this embodiment, and then the position of the corresponding electric support module 102 can be determined. The simulation of the excavation process is actually the process of lowering the height of the electric support module 102. When the electric support module 102 is lowered, the simulated coal block 101 connected to the electric support module 102 is lowered accordingly, which is equivalent to the coal seam position corresponding to the simulated coal block 101 being dug out. The above process is to control 280 electric support modules 102. The electric support modules 102 at different positions correspond to an actual height value, so that the simulated coal blocks in 14 rows and 20 columns can simulate various excavation curves.

[0057] Furthermore, if Figure 4 As shown, each of the electric support modules 102 is provided with a pressure acquisition unit 402, and the pressure acquisition unit 402 is used to detect the pressure value of the electric support module 102 and send the pressure value to the control module. In this solution, by installing measuring components on the electric support module 102 to measure the pressure value of each part of the excavation curve, a set of discrete data is established, and the control module can determine the impact of the simulated coal block at any position on the pressure value of the electric support module at the adjacent position after it is dug out based on the analysis of the discrete data. The pressure value of the electric support module comes from the simulated coal block, so the recording of discrete data can simulate the change in the pressure value generated by the remaining simulated coal blocks after the simulated coal block at any position is dug out, and then the change in the pressure value applied by the simulated surface layer 200 on the top of the simulated coal block can be determined, that is, it can predict whether the simulated surface layer 200 will experience landslides, collapses, etc.

[0058] like Figure 4As shown, the pressure collection unit 402 is arranged in the excavation head 303, and the pressure collection unit 402 is used to collect the pressure value applied by the simulated coal block 101 to the excavation head 303. The excavation head 303 includes an excavation module cover 404, an excavation module body 401 and a sensor top plate 403; the excavation module body 401 is a rectangular parallelepiped structure, and the bottom of the excavation module body 401 is connected to the telescopic end of the electric telescopic cylinder 302; the pressure collection unit 402 is arranged on the top of the rectangular parallelepiped structure, and the sensor top plate 403 is arranged on the top of the pressure collection unit 402, and the excavation module cover 404 covers the excavation module body 401, the pressure collection unit 402 and the sensor top plate 403 inside. The bottom of the excavation module body 401 can be connected to the electric telescopic cylinder 302 through a connecting bolt 405. The pressure value from the simulated coal block can be better transmitted to the pressure acquisition unit 402 through the sensor top plate 403 , and can also play a certain protective role on the pressure acquisition unit 402 .

[0059] In some embodiments, the excavation system further comprises a transparent box, wherein the plurality of simulated coal blocks and the plurality of electric support modules are arranged inside the transparent box. The staff can observe the excavation simulation process through the transparent box, so as to adjust the excavation process.

[0060] Further, the simulated surface layer 200 may include a simulated rock and soil layer, which is arranged on the upper part of the simulated coal seam, and the simulated rock and soil layer includes a plurality of rock and soil layers, each of which is set to a different color. Different rock and soil layers are set to different colors, and when the simulated coal block 101 is dug out, the flow change of each rock and soil layer can be determined by observing the color change, so as to determine the stability of each rock and soil layer after the simulated coal block 101 is dug out.

[0061] Preferably, in the above excavation system, the simulated surface layer 200 also includes a simulated loose layer, which is arranged above the simulated rock and soil layer; a camera is arranged above the simulated loose layer, and when the control module controls the electric support module to rise and fall to a corresponding height, the camera collects the surface change state of the simulated loose layer and sends the collected results to the control module; the control module is equipped with a display screen, and the display screen is used to display the results collected by the camera. The surface of the simulated loose layer is actually equivalent to the ground surface. By observing whether cracks are generated on the surface of the simulated loose layer and the timing of the cracks, the influence of the simulated coal block excavation process on the ground surface stability can be determined.

[0062] It can be understood that the material, thickness, etc. selected when designing the simulated surface layer 200 can be consistent with the actual coal mining scenario to be simulated, so that the safety and stability of the actual excavation process can be deduced through the simulated excavation conditions of this system.

[0063] In the above scheme, the control flow of the control module is as follows: Figure 5 As shown, it includes:

[0064] Step 1: Start the excavation system control subsystem in the platform software installed in the control module.

[0065] Step 2: Create an excavation surface by creating / importing / importing modifications; the excavation surface is determined by the operator based on the actual excavation plan.

[0066] Step 3: Determine the height of each electric support module according to the excavation surface and adjust it.

[0067] Step 4: When all electric support modules are in place, the simulated coal blocks corresponding to each electric support module are in place.

[0068] Step 5: Test the stability of each location after excavation.

[0069] Step 6: Adjust the excavation plan according to the stability test results, and set the height adjustment method of the electric support module by creating / importing / importing modifications.

[0070] After the excavation plan is adjusted, the excavation simulation process can be executed again until the stability of each position detected in step 5 meets the requirements. Through the above scheme provided by the present invention, before the actual excavation of the coal mine, the stability and safety of the excavation plan can be simulated in advance by testing the simulated excavation system, thereby ensuring the robustness and safety of the actual mining process.

[0071] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A coal seam module refined excavation system in a three-dimensional simulation test, characterized in that: include: A plurality of simulated coal blocks, wherein the plurality of simulated coal blocks constitute a simulated coal seam; A plurality of electric support modules, each of which is arranged at the bottom of a simulated coal block, and the electric support module is raised and lowered to drive the simulated coal block to move; A control module, whose output end is connected to the controlled end of the electric support module, the control module determines the height of each simulated coal block according to a preset excavation surface, determines the height of each electric support module according to the height of each simulated coal block, and generates a height control instruction according to the height of each electric support module; the control module sends the height control instruction of each electric support module to the corresponding electric support module to control the electric support module to rise and fall to the corresponding height; Each of the electric support modules is provided with a pressure acquisition unit, which is used to detect the pressure value borne by the electric support module and send the pressure value to the control module; the control module analyzes and determines the influence of the simulated coal block at one position on the pressure value borne by the electric support module at the adjacent position after the simulated coal block is dug out, and then determines the change of the pressure value applied by the simulated surface layer borne by the top of the simulated coal block, and predicts whether the simulated surface layer will experience landslide or collapse; Each of the electric support modules comprises: A stepper motor, whose controlled end is connected to the output end of the control module, and the stepper motor controls the driving amount of its driving output end according to the height control instruction output by the control module; An electric telescopic cylinder connected to the driving output end of the stepping motor; An excavation head, one end of which is connected to the telescopic end of the electric telescopic cylinder, and the other end of which is used to be fixedly connected to the simulated coal block; The pressure collection unit is arranged in the excavation head, and the pressure collection unit is used to collect the pressure value applied by the simulated coal block to the excavation head; The excavation head comprises an excavation module cover, an excavation module body and a sensor top plate; The excavation module body is a rectangular structure, and the bottom of the excavation module body is connected to the telescopic end of the electric telescopic cylinder; the pressure collection unit is arranged on the top of the rectangular structure, and the sensor top plate is arranged on the top of the pressure collection unit. The excavation module cover covers the excavation module body, the pressure collection unit and the sensor top plate inside.

2. The coal seam module refined excavation system in the three-dimensional simulation test according to claim 1 is characterized by: The simulated coal block has a square cross section, and the side length of the square cross section is 10-20 cm; the simulated coal blocks include at least 10 rows, and the number of the simulated coal blocks in each row includes at least 15.

3. The coal seam module refined excavation system in the three-dimensional simulation test according to claim 2 is characterized by: The side length of the square cross section is 15 cm; the simulated coal blocks include 14 rows, and the number of the simulated coal blocks in each row includes 20.

4. The coal seam module refined excavation system in the three-dimensional simulation test according to any one of claims 1 to 3, characterized in that: Also includes: A transparent box body, a plurality of the simulated coal blocks and a plurality of the electric support modules are all arranged inside the transparent box body.

5. The coal seam module refined excavation system in the three-dimensional simulation test according to claim 4 is characterized in that: Also includes: The simulated rock and soil layer is arranged on the upper part of the simulated coal seam, and the simulated rock and soil layer includes a plurality of rock and soil layers, and each rock and soil layer is set to a different color.

6. The coal seam module refined excavation system in the three-dimensional simulation test according to claim 5 is characterized in that: Also includes: A simulated loose layer is arranged above the simulated rock and soil layer; A camera is arranged above the simulated loose layer. When the control module controls the electric support module to rise and fall to a corresponding height, the camera collects the surface change state of the simulated loose layer and sends the collected result to the control module. The control module is equipped with a display screen, and the display screen is used to display the results collected by the camera.

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