A visualization method and platform for mining and movement of overburden in coal mine working face

Abstract

The present application discloses a method and a visualization platform for the mining and movement of overburden in a coal mine working face. The method comprises: in the process of the similarity model experiment of the coal mine working face, the different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain images of the experimental process; in different mining steps, the basic data of the working face and the mine pressure data of the working face are obtained; according to the sequence of the images of the experimental process, a key frame animation is made to visualize the dynamic development laws of overburden cracks, delamination development and collapse in the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation. In this way, a coherent multi-threaded display can be performed during the experiment for the movement status of the overburden strata on the working face.

Description

Technical Field

[0001] The present application relates to the field of mine technology, and in particular to a method and platform for visualizing mining and movement of overburden at a coal mine working face. Background Art

[0002] As one of the important means of studying mining disciplines, mining engineering physics similarity simulation experiments (hereinafter referred to as simulation experiments) are used to study the mining area and the vicinity of the tunnel under specific conditions based on similarity principles. They can clearly and intuitively display the internal stress, deformation and movement of coal and rock masses that were originally difficult to detect. They have unique advantages in studying the damage characteristics of overlying rock formations in the mining area and the laws of rock formation activity. Especially when the results of field exploration and measurement are difficult to explain based on practical experience, similar material simulation experiments can provide a strong basis for judgment for the scientific research process and the solution of field problems.

[0003] However, traditional simulation experiments find it difficult to reproduce and display the continuous process of the entire experiment after completing the entire experimental cycle. In addition, the images retained by traditional experiments are relatively single and static, and traditional simulation experiments cannot effectively obtain intuitive and accurate data such as stress fields and displacement fields near mining areas and tunnels. Such multiple data play a vital role in the later stage of image processing, software analysis, data mining and other means of experimental results. Summary of the invention

[0004] The embodiment of the present application provides a method and platform for visualizing the mining and movement of overburden on a coal mine working face, which can perform a coherent multi-threaded display of the movement status of the overburden on the working face during the experiment, thereby providing certain guidance for safe mining in the mine.

[0005] In order to achieve the above object, the technical solution of the embodiment of the present invention is:

[0006] In the first aspect, an embodiment of the present invention provides a method for visualizing the mining and movement of overburden in a coal mine working face, comprising: during a similarity model experiment of a coal mine working face, using an image acquisition device to perform fixed-point shooting of different mining steps in the experimental process to obtain images of the experimental process; wherein the experimental process images include the collapse morphology and movement images of the overburden at the working face under different mining steps; obtaining basic data of the working face and the mine pressure data of the working face under different mining steps; producing a key frame animation according to the sequence of the experimental process images to visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation.

[0007] In some possible implementations, the basic data of the working face include at least the mining thickness and burial depth of the coal seam at the coal mine working face, the coal seam floor contour lines, the working face length, the overburden characteristics of the top and bottom plates of the working face, the hydrogeological type of the working face, gas data, the shortest ignition period of the coal seam, the type of rock burst at the working face, and the equipment and technology of the working face.

[0008] In some possible implementations, the mine pressure data of the working face includes at least: the working face pressure step distance, the overburden collapse angle, the support load and the surrounding rock stress.

[0009] In some possible implementations, basic data of the working face and the mine pressure data of the working face are obtained under different mining steps, including: extracting the pressure step distance and the overburden collapse angle from the experimental process image; determining the layout of the survey lines and measuring points in the working face according to the structural characteristics of the working face; arranging the survey lines and measuring points and data acquisition equipment on the working face based on the layout, and obtaining the support load and surrounding rock stress.

[0010] In some possible implementations, an interactive interface is provided in the key frame animation, and the interactive interface is used to extract experimental process images of any advancement distance of the working face, basic data of the working face, and mine pressure data of the working face.

[0011] In some possible implementations, after acquiring the experimental process images, the method further includes: organizing and optimizing the experimental process images.

[0012] In the second aspect, an embodiment of the present invention provides a visualization platform for mining and movement of overburden rock in a coal mine working face, including: an image acquisition module, which is used to perform fixed-point shooting of different mining steps in the experimental process through an image acquisition device during a similarity model experiment of a coal mine working face, so as to obtain images of the experimental process; wherein the experimental process images include the collapse morphology and movement images of the overburden rock of the working face under different mining steps; a data acquisition module, which is used to obtain the basic data of the working face and the mine pressure data of the working face under different mining steps; a display module, which is used to produce a key frame animation according to the sequence of the experimental process images, and to visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation.

[0013] In some possible implementations, the basic data of the working face include at least the mining thickness and burial depth of the coal seam at the coal mine working face, the coal seam floor contour, the working face length, the overburden characteristics of the top and bottom plates of the working face, the hydrogeological type of the working face, gas data, the shortest ignition period of the coal seam, the type of rock burst at the working face, and the equipment and technology of the working face; the mine pressure data of the working face include at least: the working face pressure step distance, the overburden collapse angle, the support load and the surrounding rock stress.

[0014] In some possible implementations, an interactive button is provided on the display module for extracting experimental process images of any advancement distance of the working face, basic data of the working face, and mine pressure data of the working face.

[0015] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0016] In the present invention, during the similarity model experiment of the coal mine working face, different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain experimental process images; wherein the experimental process images include the collapse morphology and migration images of the overburden rock of the working face under different mining steps; under different mining steps, the basic data of the working face and the mine pressure data of the working face are obtained; according to the sequence of the experimental process images, a key frame animation is produced to visualize the dynamic development laws of overburden rock cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation. In this way, the basic images and mine pressure data results of the overburden collapse movement can be recorded. After the experiment is completed, the experimental data, image results and basic data of the coal mine working face can be retrieved at any time to reproduce the overburden movement and collapse laws of the working face mining. The core mine pressure data such as the support load and the pressure step distance can be retrieved at any time, and the experimental process can be displayed, which can promote the transparency of the overburden movement and mine pressure data of the working face, and provide a basis for coal mine on-site production, coal mine safety management, disaster prevention and emergency rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of an embodiment of a method for visualizing mining and movement of overburden at a coal mine working face provided for the implementation of the present invention;

[0019] Figure 2a is a schematic diagram of a key frame animation in an embodiment of the present invention;

[0020] Figure 2b is a schematic diagram of another key frame animation in an embodiment of the present invention;

[0021] Figure 2c is a schematic diagram of another key frame animation in an embodiment of the present invention;

[0022] Figure 3This is a structural schematic diagram of a visualization platform for mining and movement of overburden in a coal mine working face in an embodiment of the present invention;

[0023] Figure 4 This is a flow chart of the communication between the front-end and back-end of the visualization platform in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the relevant description of this embodiment, the terms "including, containing, having" and the like are open terms and are generally understood to include but not be limited to; the term "at least one" is generally understood to mean one or more, where "plurality" refers to two or more; the term "at least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items, for example, "at least one of a, b or c", or "at least one of a, b and c", can all represent: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively; the symbol "A / B" is used to describe the selection relationship of associated objects, generally indicating an "or" relationship before and after.

[0026] In the following description of the present embodiment, the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0027] Those skilled in the art should understand that in the following description of the embodiments of the present application, the order of serial numbers does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0028] Those skilled in the art will appreciate that the numerical ranges in the embodiments of the present application are to be construed as also specifically disclosing each intermediate value between the upper and lower limits of the scope. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded in the scope.

[0029] Unless otherwise specified, the technical / scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs. Although this application only describes preferred methods and materials, any methods and materials similar or equivalent to these may also be used in the implementation or testing of this application. All documents mentioned in this specification are incorporated by reference to disclose and describe methods and / or materials related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0030] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0031] As one of the important means of studying mining disciplines, mining engineering physics similarity simulation experiments (hereinafter referred to as simulation experiments) are used to study the mining area and the vicinity of the tunnel under specific conditions based on similarity principles. They can clearly and intuitively display the internal stress, deformation and movement of coal and rock masses that were originally difficult to detect. They have unique advantages in studying the damage characteristics of overlying rock formations in the mining area and the laws of rock formation activity. Especially when the results of field exploration and measurement are difficult to explain based on practical experience, similar material simulation experiments can provide a strong basis for judgment for the scientific research process and the solution of field problems.

[0032] However, traditional simulation experiments find it difficult to reproduce and display the continuous process of the entire experiment after completing the entire experimental cycle. In addition, the images retained by traditional experiments are relatively single and static, and traditional simulation experiments cannot effectively obtain intuitive and accurate data such as stress fields and displacement fields near mining areas and tunnels. Such multiple data play a vital role in the later stage of image processing, software analysis, data mining and other means of experimental results.

[0033] Based on this, the embodiment of the present application provides a method and platform for visualizing the mining and movement of overburden on the working face of a coal mine, which can perform a coherent multi-threaded display of the movement conditions of the overburden on the working face during the experiment, providing certain guidance for safe mining in mines.

[0034] Figure 1 A schematic diagram of an embodiment of a method for visualizing the mining and movement of overburden in a coal mine working face provided by the present invention is shown in FIG. Figure 1 As shown, the method may include:

[0035] S101, during the coal mine working face similarity model experiment, different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain images of the experimental process;

[0036] Among them, the experimental process images include the collapse morphology and migration images of the overburden rock at the working face under different mining steps;

[0037] It should be noted that the similarity model experiment of coal mine working face is to simulate various conditions and environments in the actual mining process by establishing a model with a high degree of similarity to the actual working face, so as to conduct relevant research and testing. This experimental method is of great significance for studying the mine pressure data, overburden migration law, support load and surrounding rock stress in the coal mining process. During the experiment, the similarity model can be designed and produced according to the geological conditions, mining methods, rock formation distribution and other factors of the actual working face. The model needs to meet certain similarity conditions, such as geometric similarity, physical similarity, etc., to ensure the accuracy and reliability of the experimental results.

[0038] In some embodiments, during the coal mine working face similarity model experiment, different mining steps of the experimental process are photographed at fixed points through image acquisition equipment to obtain images of the experimental process. Image acquisition equipment can be set at key positions according to experimental requirements and model characteristics.

[0039] The image acquisition device can be a high-resolution camera or video camera to ensure that the detailed changes during the experiment can be captured. At the same time, in order to ensure the continuity and stability of image acquisition, a suitable fixing method can be selected to ensure that the device does not move or shake during the experiment. For example, the camera is fixed on the observed surface of the experimental frame, and the ground is marked after the position is fixed to prevent the camera position from changing during subsequent experiments.

[0040] During the experimental mining process, the image acquisition device can take pictures according to preset time intervals or trigger conditions. For example, the trigger condition can be a preset key mining step, and the picture is taken after each key mining step is completed. Through fixed-point shooting, the state images of the experimental model at different mining steps can be obtained.

[0041] It is understandable that overburden collapse is a common geological phenomenon in coal mining, and its morphology and migration law are of great significance for understanding the distribution of mine pressure, predicting potential risks and optimizing mining plans. By collecting the overburden collapse morphology and migration images during the experimental mining process through the above-mentioned image acquisition equipment, the collapse process, collapse range and morphological changes of the overburden in different mining steps can be intuitively displayed.

[0042] For example, the overburden collapse morphology and migration images can be used to show the information of the collapse range and speed, collapse morphology and structure, migration direction and distance, and interaction with the support of the coal mine working face. Specifically, the overburden collapse morphology and migration images can show the range of overburden collapse, including the width, depth and height of the collapse. At the same time, through the continuous image sequence, the speed and acceleration of the collapse can also be analyzed to understand the dynamic characteristics of the collapse process; the morphology and structural characteristics of the collapsed body can include the shape, size, and bedding structure of the collapsed body. This information is helpful for analyzing the physical and mechanical properties of the overburden and the collapse mechanism; the migration direction and distance are of great significance for predicting the impact of collapsed rock on the working face and support, and formulating corresponding preventive measures; the interaction between supports can include whether the support is deformed and whether it can effectively support the collapsed rock.

[0043] In some embodiments, after acquiring the experimental process images, the above method may further include: organizing and optimizing the experimental process images.

[0044] The arrangement of experimental process images can include orderly classification and storage of images. Images can be grouped according to experimental steps, mining stages, or different stages of overburden collapse to ensure that each group of images reflects similar experimental conditions or phenomena. This helps to quickly locate relevant data when searching and analyzing images of a specific stage.

[0045] In some embodiments, the optimization of images can mainly be to improve the image quality and highlight the key information. Due to factors such as the experimental environment, equipment performance or shooting conditions, the original images may have problems such as noise, blur, color distortion, etc. Therefore, these images can be enhanced by image processing technology to improve their clarity and contrast, so that key information such as the collapse morphology of the overburden rock and the migration trajectory can be more prominent.

[0046] In some embodiments, the optimization of the experimental process image may also include annotation and description of the image, such as adding elements such as arrows and text boxes to the image to indicate the collapse area, migration direction or key change point.

[0047] In some embodiments, the organized and optimized experimental process images can be stored in a unified database or folder for easy access and use at any time, which can not only ensure the integrity and security of the data, but also improve the efficiency of subsequent data analysis and result interpretation.

[0048] S102, obtaining basic data of the corresponding working face and mine pressure data of the working face in different mining steps;

[0049] Among them, the basic data of the working face may at least include the mining thickness and burial depth of the coal seam at the coal mine working face, the contour lines of the coal seam bottom plate, the length of the working face, the characteristics of the overburden rock on the top and bottom plates of the working face, the hydrogeological type of the working face, gas data, the shortest ignition period of the coal seam, the type of rock impact pressure at the working face, the equipment and technology of the working face and other on-site data; the mine pressure data of the working face may at least include: the step distance of the working face pressure, the collapse angle of the overburden rock, the support load and the surrounding rock stress, etc.

[0050] In some embodiments, the basic data of the working face mainly comes from the actual mine information of the mine to be studied. In order to ensure the accuracy and effectiveness of the data, the mining thickness, burial depth, and coal seam floor contour of the working face coal seam can be accurately measured by field measurement and geological exploration methods through precise measuring instruments and professional exploration techniques. Alternatively, the basic data such as the length of the working face, the characteristics of the top and bottom plates, and the hydrogeological type of the working face can be further confirmed and supplemented by consulting existing relevant geological data and mine drawings. By obtaining the basic data of the working face, not only can the current state of the working face be deeply understood, but also the above-mentioned physical similarity phase simulation experiment close to the mine environment to be studied can be constructed. Through simulation experiments, the mining process of the working face can be analyzed and studied more deeply, possible problems and risks can be predicted, and strong technical support can be provided for the safe production and efficient mining of the mine.

[0051] In some embodiments, the above step S102 may further include:

[0052] S1021, extract the pressure step distance and overburden collapse angle from the experimental process image;

[0053] S1022, determining the arrangement of measuring lines and measuring points in the working surface according to the structural characteristics of the working surface;

[0054] S1023, arrange measurement lines, measurement points and data acquisition equipment on the working face based on the arrangement method to obtain support loads and surrounding rock stresses.

[0055] Specifically, step S1021 is achieved by in-depth analysis of the images taken during the experiment. For example, professional image processing software can be used to enlarge, compare, measure, and other operations on the images, so as to accurately extract the pressure step distance and overburden collapse angle of the working face under different mining steps. These data not only reflect the mining pressure of the working face, but also provide reference for subsequent physical similarity simulation experiments.

[0056] For step S1022, the structural characteristics of the working face include factors such as coal seam thickness, rock layer distribution, and geological structure, which will affect the arrangement of the survey lines and measuring points. Therefore, in step S1022, the actual situation of the working face can be comprehensively considered to formulate a reasonable arrangement plan of survey lines and measuring points. Specifically, it can involve detailed survey and analysis of the working face to ensure that the arrangement of survey lines and measuring points can fully and accurately reflect the actual situation of the working face.

[0057] For step S1023, the actual arrangement work can be carried out on the working face according to the previously formulated arrangement plan of measuring lines and measuring points. At the same time, data acquisition equipment can be installed to monitor and record the changes of the support load and surrounding rock stress in real time.

[0058] S103, making a key frame animation according to the sequence of the experimental process images, and visually displaying the dynamic development law of overburden cracks, separation layer development and collapse during the mining process of the working face;

[0059] Among them, the key frame animation can synchronously display the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps.

[0060] It can be understood that the experimental process images record the changes of the overburden at different stages during the mining process of the working face. These images not only contain key information such as overburden cracks, delamination development and collapse, but also reflect the impact of different mining steps on the overburden. By carefully analyzing and interpreting these images, detailed information on the dynamic development of the overburden can be obtained. In addition, the keyframe animation technology can convert discrete experimental process images into continuous dynamic videos. By setting keyframes reasonably, it can be ensured that each frame in the animation accurately reflects the state of the overburden at a specific moment. In this way, the animation can present the entire dynamic change process of the overburden from the beginning to the end of mining, allowing researchers to intuitively observe the expansion of overburden cracks, the formation of delamination and the occurrence of collapse. Thirdly, the synchronous display of the basic data of the working face and the mine pressure data of the working face can further enhance the information content and accuracy of the animation. These data not only provide real-time information during the mining process of the working face, but also can be compared and analyzed with the dynamic changes of the overburden. By comparing the data changes under different mining steps, the intrinsic connection between the overburden cracks, delamination development and collapse and the basic data of the working face and the mine pressure data can be revealed, thereby gaining a deeper understanding of the dynamic development laws of the overburden.

[0061] In some embodiments, an interactive interface is provided in the key frame animation, and the interactive interface is used to extract the experimental process image of any advancement distance of the working face, the basic data of the working face and the mine pressure data of the working face.

[0062] The design of the interactive interface enables users to easily interact with the keyframe animation and extract the required information. Through the interactive interface, users can specify any advancement distance of the working face, and the animation will quickly locate the corresponding mining stage and display the corresponding experimental process images. These images intuitively reflect the actual situation of the working face at the advancement distance, including the state of the overburden and the development of the fractures.

[0063] In addition to images, the interactive interface can also extract and display the basic data of the working face and the mine pressure data of the working face at the corresponding advancement distance. These data can be presented in the form of charts, numerical values, etc., providing users with comprehensive information about the state of the working face. By comparing the data at different advancement distances, users can deeply analyze the laws of dynamic development of overburden during mining, as well as the relationship between these data and mining steps and advancement distances. The setting of the interactive interface can make the keyframe animation a visualization platform with powerful information extraction and analysis functions. It provides users with a more flexible and convenient way to obtain and use experimental data, which helps users to have a deeper understanding of various phenomena and laws in the mining process of the working face.

[0064] For example, see FIG. 2 , which is a schematic diagram of a key frame animation in an embodiment of the present invention, wherein: Figure 2a to Figure 2c These are images of the experimental process under different mining steps.

[0065] In an embodiment of the present invention, during a similarity model experiment of a coal mine working face, different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain images of the experimental process; wherein the images of the experimental process include the collapse morphology and migration images of the overburden rock of the working face under different mining steps; under different mining steps, basic data of the working face and the mine pressure data of the working face are obtained; according to the sequence of the experimental process images, a key frame animation is produced to visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation. In this way, the basic images and mine pressure data results of the overburden collapse movement can be recorded. After the experiment is completed, the experimental data, image results and basic data of the coal mine working face can be retrieved at any time to reproduce the overburden movement and collapse laws of the working face mining. The core mine pressure data such as the support load and the pressure step distance can be retrieved at any time, and the experimental process can be displayed, which can promote the transparency of the overburden movement and mine pressure data of the working face, and provide a basis for coal mine on-site production, coal mine safety management, disaster prevention and emergency rescue.

[0066] Based on the same inventive concept, the embodiment of the present application also provides a visualization platform for overburden mining and movement at a coal mine working face. Figure 3FIG. 1 is a schematic diagram of a visualization platform for mining and movement of overburden in a coal mine working face according to an embodiment of the present invention. Figure 3 As shown, the coal mine working face overburden mining and movement visualization platform 300 may include: an image acquisition module 301, which is used to perform fixed-point shooting of different mining steps in the experimental process through image acquisition equipment during the coal mine working face similarity model experiment to obtain experimental process images; wherein the experimental process images include the collapse morphology and migration images of the overburden at the working face under different mining steps; a data acquisition module 302, which is used to obtain the basic data of the working face and the mine pressure data of the working face under different mining steps; a display module 303, which is used to produce key frame animations according to the sequence of the experimental process images, and to visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation.

[0067] In some possible implementations, the visualization platform may further include a database module; the database module includes a working face basic database and a working face mine pressure database; the working face basic database is used to store the working face basic data; the working face mine pressure database is used to store the working face mine pressure data and the experimental process image.

[0068] In some possible implementations, the basic data of the working face include at least the mining thickness and burial depth of the coal seam at the coal mine working face, the coal seam floor contour, the working face length, the overburden characteristics of the top and bottom plates of the working face, the hydrogeological type of the working face, gas data, the shortest ignition period of the coal seam, the type of rock burst at the working face, and the equipment and technology of the working face; the mine pressure data of the working face include at least: the working face pressure step distance, the overburden collapse angle, the support load and the surrounding rock stress.

[0069] In some possible implementations, an interactive button is provided on the display module for extracting experimental process images of any advancement distance of the working face, basic data of the working face, and mine pressure data of the working face.

[0070] Specifically, in the embodiment of the present invention, both databases can use MySQL database to create tables and save data, which can be retrieved through the Spring Boot framework established by IDEA, connected to the platform front end through the API interface, and the data can be called and displayed. Figure 4 As shown, Figure 4 This is a flow chart of the communication between the front-end and back-end of the visualization platform in an embodiment of the present invention.

[0071] Among them, the display module can be used to display the operations of the visualization platform on different video threads: video selection can be achieved through the wx.chooseVideo() interface, and then the video context VideoContext object is created through the wx.createVideoContext(stringid, Object this) interface to perform related operations on the video. The operation line of sight is mainly completed through the functions shown in Table 1 below.

[0072] Table 1:

[0073]

[0074] Then the functional interface is called through the interactive buttons designed by the front-end, thus completing the design of the overall platform.

[0075] In an embodiment of the present invention, during a similarity model experiment of a coal mine working face, different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain images of the experimental process; wherein the images of the experimental process include the collapse morphology and migration images of the overburden rock of the working face under different mining steps; under different mining steps, basic data of the working face and the mine pressure data of the working face are obtained; according to the sequence of the experimental process images, a key frame animation is produced to visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face; wherein the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the key frame animation. In this way, the basic images and mine pressure data results of the overburden collapse movement can be recorded. After the experiment is completed, the experimental data, image results and basic data of the coal mine working face can be retrieved at any time to reproduce the overburden movement and collapse laws of the working face mining. The core mine pressure data such as the support load and the pressure step distance can be retrieved at any time, and the experimental process can be displayed, which can promote the transparency of the overburden movement and mine pressure data of the working face, and provide a basis for coal mine on-site production, coal mine safety management, disaster prevention and emergency rescue.

[0076] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A method for visualizing overburden mining and movement at a coal mine working face, characterized in that: include: During the similarity model experiment of the coal mine working face, the different mining steps of the experimental process are photographed at fixed points by an image acquisition device to obtain images of the experimental process; wherein the images of the experimental process include the collapse morphology and migration images of the overburden rock of the working face at different mining steps; the image acquisition device takes pictures according to preset trigger conditions; the trigger conditions include preset key mining steps, and pictures are taken after each key mining step is completed, and the state images of the experimental model at different mining steps are obtained by fixed-point photography; Under the different mining steps, obtaining the corresponding basic data of the working face and the mine pressure data of the working face; A keyframe animation is produced according to the sequence of the experimental process images, and the discrete experimental process images are converted into continuous dynamic videos. Each frame in the animation can accurately reflect the state of the overburden at a specific moment, and visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face. An interactive interface is provided in the keyframe animation, and the interactive interface is used to extract the experimental process images, basic data of the working face and the mine pressure data of the working face at any advancement distance of the working face, so that the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps are synchronously displayed in the keyframe animation.

2. The method according to claim 1, characterized in that The basic data of the working face include at least the mining thickness and burial depth of the coal seam at the coal mine working face, the coal seam bottom contour line, the working face length, the overburden characteristics of the top and bottom plates of the working face, the hydrogeological type of the working face, gas data, the shortest ignition period of the coal seam, the type of rock burst at the working face, and the equipment and technology of the working face.

3. The method according to claim 2, characterized in that The mine pressure data of the working face at least include: the working face pressure step distance, overburden collapse angle, support load and surrounding rock stress.

4. The method according to claim 3, characterized in that The obtaining of the basic data of the working face and the mine pressure data of the working face under the different mining steps includes: Extracting the pressure step distance and the overburden collapse angle from the experimental process image; Determining the arrangement of measuring lines and measuring points in the working surface according to the structural characteristics of the working surface; Based on the arrangement method, survey lines, measuring points and data acquisition equipment are arranged on the working surface to obtain the support load and the surrounding rock stress.

5. The method according to claim 1, characterized in that After acquiring the experimental process image, the method further includes: organizing and optimizing the experimental process image.

6. A visualization platform for overburden mining and movement at coal mine working faces, characterized in that: include: An image acquisition module is used to, during the similarity model experiment of the coal mine working face, perform fixed-point shooting of different mining steps of the experimental process through an image acquisition device to obtain images of the experimental process; wherein the images of the experimental process include the collapse morphology and migration images of the overburden rock of the working face at different mining steps; the image acquisition device performs shooting according to preset trigger conditions; the trigger conditions include preset key mining steps, and shooting is performed after each key mining step is completed, and through fixed-point shooting, the state images of the experimental model at different mining steps are obtained; A data acquisition module, used for acquiring basic data of the working face and mine pressure data of the working face in the different mining steps; A display module is used to produce a key frame animation according to the sequence of the experimental process images, and convert discrete experimental process images into continuous dynamic videos. Each frame in the animation can accurately reflect the state of the overburden at a specific moment, and visualize the dynamic development laws of overburden cracks, delamination development and collapse during the mining process of the working face. Among them, an interactive interface is provided in the key frame animation, and the interactive interface is used to extract the experimental process images of any advancement distance of the working face, the basic data of the working face and the mine pressure data of the working face, so as to synchronously display the basic data of the working face and the mine pressure data of the working face under the corresponding mining steps in the key frame animation.

7. The visualization platform according to claim 6, characterized in that: The visualization platform also includes a database module; The database module includes a working face basic database and a working face mine pressure database; the working face basic database is used to store the working face basic data; the working face mine pressure database is used to store the working face mine pressure data and the experimental process image.

8. The visualization platform according to claim 7, characterized in that: The basic data of the working face include at least the mining thickness and burial depth of the coal seam at the coal mine working face, the contour lines of the coal seam bottom plate, the length of the working face, the characteristics of the overburden rock on the top and bottom plates of the working face, the hydrogeological type of the working face, the gas data, the shortest ignition period of the coal seam, the type of rock burst at the working face, the equipment and technology of the working face; the mine pressure data of the working face include at least: the step distance of the working face pressure, the collapse angle of the overburden rock, the support load and the surrounding rock stress.

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