Scene construction method and device for virtual simulation of coal and gas outburst

Abstract

The invention discloses a scene construction method and device for virtual simulation of coal and gas outburst, and belongs to the technical field of safety production and emergency drill simulation. Aiming at the problems of long time consumption, insufficient dynamic nature, poor authenticity, low reuse rate and the like of scene construction in the prior art, the method comprises the following steps: firstly, deconstructing accident elements to establish a dynamic module library containing environmental, disaster-causing, evolution and other categories, and receiving key parameters such as geology, triggering, environmental initiation and the like through a graphical or form interface; the parameters are converted into disaster-causing intensity data through an intelligent mapping engine, a driving module carries out cooperative calculation, and finally a visual three-dimensional scene is rendered in real time by means of a Unity 3D or Unreal Engine engine. The scene can simulate dynamic processes such as gas diffusion and explosion impact, high fidelity and immersion are achieved, one-key rapid generation is achieved, drilling requirements of different levels are met, and the framework can be expanded to emergency drilling scene construction in other industries such as chemical leakage and fire disaster.

Description

Technical Field

[0001] This invention relates to the field of safety production and emergency drill simulation technology, and in particular to a method and apparatus for constructing scenarios for virtual simulation of coal and gas outbursts. Background Technology

[0002] With the development of virtual reality (VR) and simulation technologies, their application in emergency drills for coal mine safety production is becoming increasingly widespread. By constructing realistic accident scenarios, immersive and repeatable training environments can be provided for rescue personnel, greatly enhancing their emergency response capabilities. However, existing technologies face numerous prominent problems and bottlenecks when constructing high-profile accident scenarios.

[0003] Current scenario construction largely relies on manual creation using 3D modeling software. Building a high-fidelity emergency scene from scratch requires numerous steps, including modeling, texturing, setting physical properties, and integrating special effects, which is time-consuming and cannot meet the rapid scenario generation needs of emergency drills. Existing methods mostly only build static scenes; the accident form, development, and disaster chain are all preset and fixed. This makes it easy for drill participants to memorize the scene, failing to simulate the dynamic evolution process caused by changes in environmental parameters in real accidents, thus reducing the realism and training value of the drills. The rationality and realism of the scene highly depend on the builder's deep understanding of coal mine safety and the mechanisms of coal outburst accidents. Ordinary technicians find it difficult to accurately convert abstract technical parameters (such as gas emission and coal outburst volume) into a visualized 3D scene, resulting in a scene that may not conform to physical laws. Scenario construction work for different projects and different mines is independent, with low model and logic code reuse rates, resulting in a large amount of repetitive work and wasted resources.

[0004] Therefore, there is an urgent need in this field for a new method that can quickly, dynamically, and in a standardized manner construct prominent accident scenarios to overcome the aforementioned technical deficiencies. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, the first objective of this invention is to propose a scenario construction method for virtual simulation of coal and gas outbursts.

[0007] Another objective of this invention is to provide a scene construction device for virtual simulation of coal and gas outbursts.

[0008] The third objective of this invention is to provide a computer device.

[0009] A fourth objective of this invention is to provide a non-transitory computer-readable storage medium.

[0010] To achieve the above objectives, a first aspect of the present invention proposes a method for constructing a scene for virtual simulation of coal and gas outbursts, comprising: S10 decomposes coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and establishes a dynamic module library with parameterized interfaces; S20 receives geological parameters, trigger parameters, and initial environmental parameters input by the user through a graphical interface; S30, based on the intelligent mapping rule engine, transforms the geological parameters into disaster-causing intensity parameters, and automatically calls the corresponding modules and initializes their states according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. S40 drives the collaborative calculation of various modules in the evolution module, and simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time based on the gas diffusion model and disaster chain logic. When the preset conditions are met, it automatically instantiates explosion effects, shock wave simulation and equipment damage effects.

[0011] In one embodiment of the present invention, S10 includes: Construct a dynamic disaster model to calculate the intensity of the outburst in real time based on geological conditions, such as the amount of coal outburst and the amount of gas emission. The gas emission rate is the increase in gas emission rate before and after the outburst, calculated based on the variation of return air gas concentration and air volume measurements.

[0012] In one embodiment of the present invention, S20 includes: Geological parameters include burial depth, gas pressure, and coal seam thickness; triggering parameters include outburst location coordinates and outburst occurrence time. Initial environmental parameters include initial ventilation velocity and tunnel temperature.

[0013] In one embodiment of the present invention, S30 includes: The system uses the built-in protrusion intensity prediction algorithm to calculate the disaster intensity parameters in real time based on the geological parameters input by the user. Based on the prominent location and disaster intensity parameters, the system automatically calls the corresponding environmental module and disaster-causing module from the module library and initializes their status. The modules in the drive evolution module perform collaborative calculations. For example, the gas emission rate v and emission time t output by the disaster-causing module are used as input boundary conditions for the gas diffusion model to drive the real-time diffusion simulation of gas clouds in the three-dimensional scene.

[0014] In one embodiment of the present invention, S40 includes: Using Unity3D or Unreal Engine, the dynamic data output by the intelligent mapping rule engine can be transformed into a visualized 3D scene in real time. Simulate prominent coal powder injection and gas overflow using particle systems; Use post-processing effects to simulate reduced visibility and camera shake during explosions; Use a sound effects system to simulate loud noises, alarm sounds, and explosion sounds; Team members can freely patrol and interact with the generated accident scenario using VR devices or desktop applications.

[0015] In one embodiment of the present invention, the method further includes: A simplified algorithm based on computational fluid dynamics was used to simulate the change of methane concentration distribution in a roadway over time. Simulate the diffusion and settling of coal dust. Define that when the gas concentration reaches the explosion limit and an ignition source is present, the gas explosion effect and shock wave module will be automatically triggered.

[0016] In one embodiment of the present invention, the method further includes: The gas emission calculation model is as follows:

[0017] Where C i The average gas volume fraction (%) during time period i in the return airway. The average return air volume (m³) within time period i in the return airway. 3 / min), T i The time length (in minutes) of the i-th segment; The calculation model for coal outburst volume is as follows:

[0018] Where G represents the amount of coal that has been exposed, in tons (t); V i The volume of coal accumulation in the i-th segment is expressed in cubic meters (m³). 3 ); The bulk density of coal in the i-th segment is expressed in tons per cubic meter (t / m³). 3 The value range is 0.8t / m 3 ~1.0t / m 3 The smaller value is used when the coal particle size is small; i is the i-th segment; n is the number of segments.

[0019] To achieve the above objectives, a second aspect of the present invention provides an analysis device for the flow rate, efficiency, and water consumption rate of a hydropower plant generator unit, comprising: The element decomposition and module library creation module is used to decompose coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and to create a dynamic module library with parameterized interfaces. The parameter receiving module is used to receive geological parameters, trigger parameters, and initial environmental parameters input by the user through a graphical interface. The intelligent mapping and module initialization module is used to convert the geological parameters into disaster-causing intensity parameters based on the intelligent mapping rule engine, and automatically call the corresponding module and initialize its state according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. The collaborative computing and disaster simulation module is used to drive the collaborative computing of various modules in the evolution module. Based on the gas diffusion model and disaster chain logic, it simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time, and automatically instantiates explosion effects, shock wave simulation and equipment damage effects when preset conditions are met.

[0020] The present invention provides a method and apparatus for constructing scenarios for virtual simulation of coal and gas outbursts, which can rapidly generate dynamic scenarios of coal and gas outburst accidents based on physical laws, improve the realism and scientific nature of the drills, significantly improve construction efficiency, and support standardized reuse for multiple mines and multiple disasters.

[0021] To achieve the above objectives, a third aspect of this application provides a computer device comprising a processor and a memory; wherein the processor runs a program corresponding to the executable program code stored in the memory, for implementing a scenario construction method for virtual simulation of coal and gas outbursts as described in the first aspect embodiment.

[0022] To achieve the above objectives, a fourth aspect of this application provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a scenario construction method for virtual simulation of coal and gas outbursts as described in the first aspect embodiment.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a flowchart of a scenario construction method for virtual simulation of coal and gas outbursts according to an embodiment of the present invention; Figure 2 This is a scene construction architecture diagram according to an embodiment of the present invention; Figure 3 This is a flowchart of scene construction according to an embodiment of the present invention; Figure 4 This is a structural diagram of a scene construction device for virtual simulation of coal and gas outbursts according to an embodiment of the present invention; Figure 5 It is a computer device according to an embodiment of the present invention. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] The following description, with reference to the accompanying drawings, describes a method and apparatus for constructing a virtual simulation of coal and gas outbursts according to an embodiment of the present invention.

[0028] Figure 1 This is a flowchart of a scenario construction method for virtual simulation of coal and gas outbursts according to an embodiment of the present invention, such as... Figure 1 As shown, it includes: S10 decomposes coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and establishes a dynamic module library with parameterized interfaces; S20 receives geological parameters, trigger parameters, and initial environmental parameters input by the user through a graphical interface; S30, based on the intelligent mapping rule engine, transforms the geological parameters into disaster-causing intensity parameters, and automatically calls the corresponding modules and initializes their states according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. S40 drives the collaborative calculation of various modules in the evolution module, and simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time based on the gas diffusion model and disaster chain logic. When the preset conditions are met, it automatically instantiates explosion effects, shock wave simulation and equipment damage effects.

[0029] Figure 2 This is a scene construction architecture diagram according to an embodiment of the present invention. Figure 3 This is a flowchart illustrating the scene construction process according to an embodiment of the present invention, including: S1: Deconstruct accident elements and establish a dynamic module library.

[0030] S11: Stores 3D models of tunnels, working faces, equipment, etc. The models include pre-defined parametric interfaces such as tunnel length, cross-sectional area, and ventilation resistance coefficient.

[0031] S12: Define the source of the outburst, the outburst object, and the gas source. Construct a dynamic disaster model to calculate the intensity of the outburst in real time based on geological conditions (ground stress, gas pressure, coal strength), such as the amount of coal outburst and the amount of gas emitted.

[0032] The gas emission rate is the increase in gas emission rate before and after the outburst, calculated based on the variation of return air gas concentration and air volume measurements.

[0033] The gas emission calculation model is as follows:

[0034] Where C i The average gas volume fraction (%) during time period i in the return airway. The average return air volume (m³) within time period i in the return airway. 3 / min), T i Let be the time length (min) of the i-th segment.

[0035] The calculation model for coal outburst volume is as follows:

[0036] Where G represents the amount of coal that has been exposed, in tons (t); V i The volume of coal accumulation in the i-th segment is expressed in cubic meters (m³). 3 ); The bulk density of coal in the i-th segment is expressed in tons per cubic meter (t / m³). 3 The value range is 0.8t / m 3 ~1.0t / m 3 The smaller value is used when the coal particle size is small; i is the i-th segment; n is the number of segments.

[0037] S13: Based on a simplified algorithm of computational fluid dynamics, simulate the change of gas concentration distribution in roadways over time; simulate the diffusion and settling of outburst coal dust; define the automatic triggering of gas explosion effects and shock wave modules when the gas concentration reaches the explosion limit and an ignition source is present.

[0038] S14: Define the impact of disasters on the environment and people. This includes: visibility change models, environmental hypoxia models, equipment damage state models, etc.

[0039] S2: Set up a graphical or form-based user input interface to receive key driving parameters set by the user, including geological parameters, trigger parameters, and initial environmental parameters. Among them, geological parameters include burial depth, gas pressure, and coal seam thickness; trigger parameters include outburst location coordinates and outburst occurrence time; initial environmental parameters include initial ventilation velocity and roadway temperature.

[0040] S3: Build an intelligent mapping engine, which includes a series of rules and algorithms.

[0041] S31: The system uses the built-in salient intensity prediction algorithm to calculate the disaster intensity parameters in real time based on the geological parameters input by the user.

[0042] S32: Based on the location of the protrusion and the disaster intensity parameters, automatically call the corresponding environmental module and disaster module from the module library and initialize their states (e.g., set the outflow rate to v for the gas source and set the initial velocity of the protrusion to the value calculated from the disaster intensity parameters).

[0043] S33: Drive the collaborative calculation of each module in the evolution module. For example, the gas emission rate v and emission time t output by the disaster-causing module are used as the input boundary conditions of the gas diffusion model to drive the real-time diffusion simulation of gas clouds in the three-dimensional scene.

[0044] S4: Using Unity3D or Unreal Engine, dynamic data output by the intelligent mapping rule engine is transformed into a visualized 3D scene in real time. Particle systems simulate prominent coal dust injection and gas overflow; post-processing effects simulate reduced visibility and camera shake during explosions; sound effects systems simulate loud noises, alarms, and explosions. Team members can freely patrol and interact with the generated accident scene using VR devices or desktop applications.

[0045] Compared with existing technologies, this invention has the following significant advantages: It accelerates scenario construction efficiency; users only need to input key parameters to generate high-fidelity, interactive dynamic accident scenarios. Because the scenario is driven by an inherent physical model and rule engine, its evolution strictly follows the laws of disaster dynamics, avoiding the subjectivity and arbitrariness of human construction, resulting in scenarios with greater scientific reference value. The system can quickly generate various drill scenarios for different mine conditions and disaster levels, meeting the comprehensive and differentiated drill needs from new employee training to expert-level command and decision-making. The scenario construction framework proposed in this invention has universal applicability and can be extended to the rapid construction of emergency drill scenarios in other industries (such as chemical leaks, fires, and earthquakes), with broad market prospects.

[0046] To achieve the above embodiments, such as Figure 4 As shown, this embodiment also provides a scene construction device 10 for virtual simulation of coal and gas outbursts, including: Module 100, which is used to decompose coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and to establish a dynamic module library with parameterized interfaces. The parameter receiving module 200 is used to receive geological parameters, trigger parameters and initial environmental parameters input by the user through a graphical interface; The intelligent mapping and module initialization module 300 is used to convert the geological parameters into disaster-causing intensity parameters based on the intelligent mapping rule engine, and automatically call the corresponding module and initialize its state according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. The collaborative computing and disaster simulation module 400 is used to drive the collaborative computing of various modules in the evolution module. Based on the gas diffusion model and disaster chain logic, it simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time, and automatically instantiates explosion effects, shock wave simulation and equipment damage effects when preset conditions are met.

[0047] The present invention provides a method and apparatus for constructing scenarios for virtual simulation of coal and gas outbursts, which can rapidly generate dynamic scenarios of coal and gas outburst accidents based on physical laws, improve the realism and scientific nature of the drills, significantly improve construction efficiency, and support standardized reuse for multiple mines and multiple disasters.

[0048] To implement the methods of the above embodiments, the present invention also provides a computer device, such as... Figure 5 As shown, the computer device 600 includes a memory 601 and a processor 602; wherein, the processor 602 reads the executable program code stored in the memory 601 to run a program corresponding to the executable program code, so as to implement the various steps of the scenario construction method for virtual simulation of coal and gas outburst described above.

[0049] To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a scenario construction method for virtual simulation of coal and gas outbursts as described in the foregoing embodiments.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for constructing a scene for virtual simulation of coal and gas outbursts, characterized in that, include: S10 decomposes coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and establishes a dynamic module library with parameterized interfaces; S20 receives geological parameters, trigger parameters, and initial environmental parameters input by the user through a graphical interface; S30, based on the intelligent mapping rule engine, transforms the geological parameters into disaster-causing intensity parameters, and automatically calls the corresponding modules and initializes their states according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. S40 drives the collaborative calculation of various modules in the evolution module, and simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time based on the gas diffusion model and disaster chain logic. When the preset conditions are met, it automatically instantiates explosion effects, shock wave simulation and equipment damage effects.

2. The method as described in claim 1, characterized in that, S10 includes: Construct a dynamic disaster model to calculate the intensity of the outburst in real time based on geological conditions, such as the amount of coal outburst and the amount of gas emission. The gas emission rate is the increase in gas emission rate before and after the outburst, calculated based on the variation of return air gas concentration and air volume measurements.

3. The method as described in claim 1, characterized in that, S20 includes: Geological parameters include burial depth, gas pressure, and coal seam thickness; triggering parameters include outburst location coordinates and outburst occurrence time. Initial environmental parameters include initial ventilation velocity and tunnel temperature.

4. The method as described in claim 1, characterized in that, S30 includes: The system uses the built-in protrusion intensity prediction algorithm to calculate the disaster intensity parameters in real time based on the geological parameters input by the user. Based on the prominent location and disaster intensity parameters, the system automatically calls the corresponding environmental module and disaster-causing module from the module library and initializes their status. The modules in the drive evolution module perform collaborative calculations. For example, the gas emission rate v and emission time t output by the disaster-causing module are used as input boundary conditions for the gas diffusion model to drive the real-time diffusion simulation of gas clouds in the three-dimensional scene.

5. The method as described in claim 1, characterized in that, S40 includes: Using Unity3D or Unreal Engine, the dynamic data output by the intelligent mapping rule engine can be transformed into a visualized 3D scene in real time. Simulate prominent coal powder injection and gas overflow using particle systems; Use post-processing effects to simulate reduced visibility and camera shake during explosions; Use a sound effects system to simulate loud noises, alarm sounds, and explosion sounds; Team members can freely patrol and interact with the generated accident scenario using VR devices or desktop applications.

6. The method as described in claim 2, characterized in that, The method further includes: A simplified algorithm based on computational fluid dynamics was used to simulate the change of methane concentration distribution in a roadway over time. Simulate the diffusion and settling of coal dust. Define that when the gas concentration reaches the explosion limit and an ignition source is present, the gas explosion effect and shock wave module will be automatically triggered.

7. The method as described in claim 6, characterized in that, The method further includes: The gas emission calculation model is as follows: Where C i The average gas volume fraction (%) during time period i in the return airway. The average return air volume (m³) within time period i in the return airway. 3 / min), T i The time length (in minutes) of the i-th segment; The calculation model for coal outburst volume is as follows: Where G represents the amount of coal that has been exposed, in tons (t); V i The volume of coal accumulation in the i-th segment is expressed in cubic meters (m³). 3 ); The bulk density of coal in the i-th segment is expressed in tons per cubic meter (t / m³). 3 The value range is 0.8t / m 3 ~1.0t / m 3 The smaller value is used when the coal particle size is small; i is the i-th segment; n is the number of segments.

8. A scene construction device for virtual simulation of coal and gas outbursts, characterized in that, include: The element decomposition and module library creation module is used to decompose coal mine accident elements into roadway, working face, equipment, outburst source, gas source and environmental impact modules, and to create a dynamic module library with parameterized interfaces. The parameter receiving module is used to receive geological parameters, trigger parameters, and initial environmental parameters input by the user through a graphical interface. The intelligent mapping and module initialization module is used to convert the geological parameters into disaster-causing intensity parameters based on the intelligent mapping rule engine, and automatically call the corresponding module and initialize its state according to the disaster-causing intensity parameters and trigger parameters, including setting the outflow rate for the gas source and setting the initial velocity for the outburst. The collaborative computing and disaster simulation module is used to drive the collaborative computing of various modules in the evolution module. Based on the gas diffusion model and disaster chain logic, it simulates the gas concentration distribution, coal dust diffusion and settling and explosion triggering process in real time, and automatically instantiates explosion effects, shock wave simulation and equipment damage effects when preset conditions are met.

9. A computer device, characterized in that, Including processor and memory; The processor reads executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement a scenario construction method for virtual simulation of coal and gas outburst as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements a scenario construction method for virtual simulation of coal and gas outbursts as described in any one of claims 1-7.

Images