Coal mine emergency drilling method and system based on dynamic catastrophe chain simulation

Abstract

The invention relates to a coal mine emergency drilling method and system based on dynamic catastrophe chain simulation, and belongs to the field of mine emergency rescue simulation training drilling. In order to solve the technical problems that in existing coal and gas outburst accident emergency drilling, static scene simulation cannot truly reproduce disaster burstiness and dynamic evolution characteristics, catastrophe chain type propagation process real-time simulation is lacked, drilling immersion is poor, and co-processing ability training is insufficient, the method comprises the steps that a mine three-dimensional scene is constructed, outburst parameters are input, and the coal and gas outburst accident emergency drilling is completed. The process of shock wave propagation, crushed coal body throwing and gas diffusion is dynamically simulated, and the damage state of equipment is simulated based on shock wave pressure, so that high-fidelity dynamic reduction of the whole coal and gas outburst process is realized. According to the method and the system, the consistency of a drilling scene and real catastrophe is effectively improved, the fidelity and effectiveness of emergency training are remarkably enhanced, and high-quality informatization technical support is provided for the emergency decision-making and co-processing capability of mine workers under the complex catastrophe condition.

Description

Technical Field

[0001] This invention belongs to the field of mine emergency rescue simulation training and exercise, and relates to a coal mine emergency exercise method and system based on dynamic disaster chain simulation. Background Technology

[0002] Coal and gas outbursts are among the most serious hazards threatening coal mine production safety. Studies have shown that emergency training and drills can effectively reduce casualties during accidents. However, existing emergency training and drill technologies for outbursts largely rely on static scenario simulations or text-based pre-planning exercises, making it difficult to realistically reproduce the suddenness and dynamic evolution of coal and gas outbursts. In particular, existing technologies lack real-time simulations of gas backflow, airflow disturbances, and the chain reaction propagation process after an outburst is triggered, resulting in poor immersion and limited response training effectiveness. Such drills cannot effectively improve the emergency decision-making and collaborative response capabilities of mine workers under complex disaster conditions. Therefore, to improve the informatization level of rescue training, there is an urgent need for a method for reconstructing coal and gas outburst disaster scenarios in mines, accurately simulating a dynamic environment that closely matches the actual rescue scenario during a disaster, and providing technical support for high-quality emergency training. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a coal mine emergency drill method and system based on dynamic disaster chain simulation. Addressing the shortcomings of existing drills—namely, "static scenarios, instantaneous disasters, and lack of a disaster chain"—this invention aims to solve three major technical challenges: the inability to recreate the dynamic behavior of the entire coal and gas outburst process, the disconnect between the drill environment and real rescue operations, and the inability to quantify and improve collaborative response capabilities.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A coal mine emergency drill method based on dynamic disaster chain simulation includes the following steps: Construct a 3D scene of the mine before the disaster, the 3D scene including roadways and equipment models within the roadways; Enter the basic parameters of coal and gas outburst, including outburst location, outburst coal volume, gas emission volume, and initial gas pressure; The dynamic simulation of the coal and gas outburst process includes: simulating the dynamic propagation of the shock wave after the outburst and calculating the pressure of the shock wave at different locations in the roadway; simulating the throwing process of the broken coal body after the outburst and reproducing the dynamic migration and distribution of pulverized coal; and simulating the dynamic diffusion and spread of the high-pressure gas flow after the outburst and calculating the concentration distribution of gas in the roadway. Based on the pressure of the shock wave, the damage state of the equipment in the three-dimensional scene is simulated.

[0005] Furthermore, the step of simulating the dynamic propagation of the shock wave after the protrusion includes: Based on the shock wave overpressure peak attenuation model Calculate the pressure of the shock wave at a distance x from the bulge. ,in This is the attenuation correction factor. The distance from the protrusion. This refers to the maximum pressure at the protrusion point after the shock wave emerges; the... according to The calculation yielded, where The initial pressure of the tunnel, For the corrected overpressure at the protrusion; the according to Perform calculations, where To highlight the cross-sectional area, The cross-sectional area of ​​the alleyway. The specific heat ratio of air. Under ideal conditions, the outlet pressure is excessive; according to It was calculated using an iterative algorithm, where To highlight the gas pressure in the hole, For the specific heat ratio of gas, , For gas temperature, The gas constant is It is a parameter.

[0006] Furthermore, the method also includes: using Shader Graph technology to perform UV distortion in the area through which the shock wave passes, and adding radial blur and screen dithering to simulate the visual effect of a shock wave.

[0007] Furthermore, the steps for simulating the throwing process of broken coal after an outburst include: establishing a coal body model at the outburst location; loading a pre-formed coal block using a particle system and setting physical properties for the particles, including explosive force, gravity, density, and rigid body characteristics; and performing collision detection using visual effects (VFX) collision events accelerated by a graphics processing unit (GPU) to render the movement of large-scale coal powder particles.

[0008] Furthermore, the step of calculating the gas concentration distribution in the roadway includes: for roadway nodes ,according to Calculate the gas concentration after inflow mixing. ;in, Representative node Inflow branch, For nodes The number of inflow branches, for Branch gas concentration, for Branch gas flow, For nodes The source strength of the gas.

[0009] Furthermore, the method also includes: generating a three-dimensional gas concentration cloud map based on the calculated gas concentration distribution data, and highlighting the gas exceeding the limit area according to the concentration warning value set by the user.

[0010] Furthermore, the step of simulating the damage state of the device in the three-dimensional scene includes: Establish a database of equipment failure states, which stores models of equipment failure states under different failure pressures; Add a destruction effect trigger to the device model; When the shock wave pressure at the location of the device reaches the pressure value set by the trigger, the corresponding damage state model in the database is invoked to display the damage state of the device.

[0011] A coal mine emergency drill system based on dynamic disaster chain simulation includes: A 3D scene construction module is used to construct a pre-disaster 3D scene of the mine, which includes roadways and equipment models within the roadways; The parameter input module is used to input the basic parameters of coal and gas outbursts, including outburst location, outburst coal volume, gas emission volume, and original gas pressure. The dynamic simulation module is used to dynamically simulate the coal and gas outburst process. The dynamic simulation module includes: a shock wave simulation unit, which is used to simulate the dynamic propagation of the shock wave after the outburst and calculate the pressure of the shock wave at different locations in the roadway. The coal throwing simulation unit is used to simulate the throwing process of broken coal after an outburst, and reproduce the dynamic migration and distribution of pulverized coal; The gas diffusion simulation unit is used to simulate the dynamic diffusion and spread of high-pressure gas flow after an outburst, and to calculate the concentration distribution of gas in the roadway. The equipment damage simulation module is used to simulate the damage state of the equipment in the three-dimensional scene based on the pressure of the shock wave. The visualization module is used to receive the output data from the dynamic simulation module and the equipment damage simulation module, and to generate and display a three-dimensional virtual scene of the dynamic exercise.

[0012] Furthermore, the shock wave simulation unit is specifically used for: Based on the shock wave overpressure peak attenuation model Calculate the shock wave at the distance from the protrusion Pressure at the location ,in This is the attenuation correction factor. The distance from the protrusion. This represents the maximum pressure at the protrusion point after the shock wave emerges; according to Calculate the ,in The initial pressure of the tunnel, For the corrected overpressure at the protrusion; according to Calculate the ,in To highlight the cross-sectional area, The cross-sectional area of ​​the alleyway. The specific heat ratio of air. For ideal conditions, the outlet overpressure is expected; and according to Calculate the using iterative algorithm ,in To highlight the gas pressure in the hole, For the specific heat ratio of gas, , For gas temperature, The gas constant is It is a parameter.

[0013] Furthermore, the coal throwing simulation unit is specifically used for: Establish a coal seam model in a prominent location; A pre-formed coal block crushing material is loaded using a particle system, and physical properties are set for the particles, including explosive force, gravity, density, and rigid body properties. Collision detection is performed using collision events from Visual Effects (VFX) accelerated by the Graphics Processing Unit (GPU) to render large-scale coal dust particle motion.

[0014] Furthermore, the gas diffusion simulation unit is specifically used for: for roadway nodes ,according to Calculate the gas concentration after inflow mixing. ;in, Representative node Inflow branch, For nodes The number of inflow branches, for Branch gas concentration, for Branch gas flow, For nodes The source strength of the gas.

[0015] Furthermore, the equipment damage simulation module is specifically used for: establishing an equipment damage state database, the database storing equipment damage state models under different damage pressures; adding damage effect triggers to the equipment models; and when the shock wave pressure at the location of the equipment reaches the pressure value set by the trigger, calling the corresponding damage state model in the database to display the equipment damage state.

[0016] Furthermore, the visualization module is specifically used to: use Shader Graph technology to perform UV distortion, add radial blur and screen dithering to display the visual effect of the shock wave; generate a three-dimensional gas concentration cloud map and highlight the gas exceeding the limit area; and render the dynamic migration distribution of the broken coal body.

[0017] The beneficial effects of this invention are as follows: (1) The use of virtual simulation technology to dynamically simulate coal and gas outburst accidents breaks through the limitations of existing static drill scenarios for coal and gas outburst accidents, realizes the dynamic restoration of the disaster process, and improves the consistency between the drill scenario and the actual disaster.

[0018] (2) Compared with traditional physical drills, the present invention reduces the cost and risk of disaster drills, making large-scale, high-frequency emergency drills possible.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 Flowchart of the coal and gas outburst simulation calculation module; Figure 2 The flowchart highlights the three-dimensional virtual disaster scene module. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] This invention provides a coal mine emergency drill method based on dynamic disaster chain simulation, comprising the following steps: First, constructing a pre-disaster three-dimensional mine scene, which includes roadways and equipment models within the roadways; next, inputting basic parameters of coal and gas outbursts, including outburst location, outburst coal volume, gas emission volume, and initial gas pressure; then, dynamically simulating the coal and gas outburst process, which includes: simulating the dynamic propagation of the shock wave after the outburst and calculating the pressure of the shock wave at different locations in the roadway; simulating the throwing process of the broken coal body after the outburst and reproducing the dynamic migration and distribution of pulverized coal; simulating the dynamic diffusion and spread of high-pressure gas flow after the outburst and calculating the gas concentration distribution in the roadway; finally, simulating the damage state of equipment in the three-dimensional scene based on the calculated shock wave pressure.

[0025] This invention also provides a coal mine emergency drill system based on dynamic disaster chain simulation. The system includes: a 3D scene construction module for constructing a pre-disaster 3D mine scene, including roadways and equipment models within the roadways; a parameter input module for inputting basic parameters of coal and gas outbursts, including outburst location, outburst coal volume, gas emission volume, and initial gas pressure; a dynamic simulation module for dynamically simulating the coal and gas outburst process, including: a shock wave simulation unit for simulating the dynamic propagation of shock waves after an outburst and calculating the pressure of the shock wave at different locations in the roadway; a coal body throwing simulation unit for simulating the throwing process of broken coal after an outburst and reproducing the dynamic transport and distribution of pulverized coal; a gas diffusion simulation unit for simulating the dynamic diffusion and spread of high-pressure gas flow after an outburst and calculating the gas concentration distribution in the roadway; an equipment damage simulation module for simulating the damage state of equipment in the 3D scene based on the pressure calculated by the shock wave simulation unit; and a visualization module for receiving the output data from the dynamic simulation module and the equipment damage simulation module, generating and displaying the 3D virtual scene of the dynamic drill.

[0026] Example 1: This embodiment provides a method for coal mine emergency drills based on dynamic disaster chain simulation. The method describes in detail the entire process from scenario construction to disaster simulation.

[0027] Step 1: Constructing a Pre-Disaster 3D Mine Scene Before the exercise begins, a high-fidelity pre-disaster 3D mine scene needs to be constructed. This step serves as the spatial carrier for all subsequent dynamic simulations. Specifically, this embodiment integrates two advanced tunnel modeling techniques: the first is parametric modeling of the tunnel centerline-section, and the second is on-site laser point cloud modeling using a laser scanner. The combination of these two techniques ensures the accuracy of the tunnel geometry model. Simultaneously, professional 3D modeling software such as 3ds Max is used to meticulously construct 3D models of various underground equipment, including coal mining machines, coal mining supports, tunneling machines, tracks, conveyor belts, ventilation ducts, pipelines, and ventilation doors. Finally, based on the actual placement of these devices in the tunnel, the constructed equipment models are precisely placed into the 3D tunnel scene, thus realistically recreating the underground tunnel operation scenario.

[0028] Step Two: Inputting Basic Parameters for Coal and Gas Outbursts After the scenario is constructed, the exercise organizer needs to input the basic parameters for the coal and gas outbursts in this exercise. These parameters are the initial conditions for the simulation calculations, determining the initial intensity and location of the disaster. These parameters specifically include: Location of coal and gas outbursts: for example, specifying a tunneling face or coal mining face.

[0029] The size of the protruding opening radius.

[0030] Outburst coal volume: in tons (t).

[0031] Gas emission rate: in cubic meters 3 This portion of the gas volume includes gas that directly emerges from the outburst, as well as gas desorbed from the outburst coal seam.

[0032] Original gas pressure in the protruding hole: unit is kPa.

[0033] Step 3: Dynamic Simulation of Coal and Gas Outburst Process. Once the parameters are entered and the exercise begins, the system initiates a dynamic virtual simulation. This process mainly consists of three concurrent parts: shock wave simulation, coal throwing simulation, and gas diffusion simulation.

[0034] 3.1 Simulation of the dynamic propagation of the shock wave after the outburst First, the shock wave generated at the moment of the disaster and its dynamic propagation in the tunnel are simulated. Shock wave intensity calculation: This embodiment uses a shock wave overpressure peak attenuation model. To estimate the distance of the shock wave from the bulge in the tunnel. x Pressure at the location y In this formula: a This is the attenuation correction factor, which is related to the size of the protrusion and the diameter and cross-sectional area of ​​the tunnel. It can be set to the default value or modified by the user. This represents the maximum pressure at the protrusion point after the shock wave emerges. x To calculate the distance from the point to the protrusion.

[0035] The calculation process is as follows: First, according to The calculation yielded the following. The initial pressure of the roadway is usually assumed to be atmospheric pressure, 100 kPa. This is the corrected overpressure at the protrusion. The calculation requires first estimating the overpressure at the protrusion under ideal conditions. Ideally, the cross-sectional area of ​​the protrusion is assumed to be... with the cross-sectional area of ​​the tunnel equal.

[0036] Through formula It was calculated using an iterative algorithm.

[0037] In this formula: To highlight the gas pressure in the hole; The initial pressure of the tunnel; The specific heat ratio of air is taken as 1.4; The specific heat ratio of gas is taken as 1.3; ,in For gas temperature, The gas constant is It is a parameter.

[0038] Due to the actual protruding caliber Often smaller than the tunnel opening diameter Therefore, it is necessary to use the formula. right Corrections were made to obtain the true overpressure at the protrusion. .

[0039] Visual representation of the shockwave: To enhance the immersiveness and realism of the exercise, this embodiment utilizes Shader Graph technology in Unity3D to apply UV distortion of 70° to the virtual area through which the shockwave passes. Simultaneously, radial blur is added to simulate visual oscillation, and screen shaking is used to enhance the impact feedback.

[0040] 3.2 Simulation of the throwing process of broken coal body after outburst Secondly, the system simulates the throwing, transport, and distribution process of the broken coal body after an outburst. The coal body ejected in a coal and gas outburst is highly fragmented, with an effective particle size typically ranging from 0.02 to 10 mm. This embodiment utilizes the particle system in Unity3D to simulate this effect. The specific steps are as follows: First, a complete coal body model is established at the outburst location, and the material and texture of the coal body are set. Then, a pre-processed high-precision broken coal block prefab is loaded using the mesh particle system. The system sets the particle diameter range to 0.02 to 10 mm and assigns realistic physical properties to each particle, including explosive force, gravity, density, rigid body properties, etc. Finally, the rendering of large-scale coal powder particle movement is implemented in Unity3D. Collision detection here uses Graphics Processing Unit (GPU) accelerated Visual Effects (VFX) collision events, thereby efficiently achieving high-fidelity dynamic reproduction of pulverized coal in virtual space.

[0041] 3.3 Simulation of the dynamic diffusion and spread of high-pressure gas flow after a gas outburst Next, the system simulates the dynamic diffusion and spread of the high-pressure gas flow after the outburst in a complex roadway network. Gas concentration calculation: For any node m in the roadway network, the gas concentration after inflow mixing is... According to the formula Perform the calculation. In this formula: The inflow branch representing node m; Let m be the number of inflow branches to node m. The influent mixing concentration at node m is expressed in mol / L. The concentration of methane gas in branch k is expressed in mol / L. Gas flow rate of branch k, in meters. 3 / s; The gas source intensity of node m itself, in kg / m³. 3 By iteratively solving this formula across the entire roadway network, the dynamic distribution of gas concentration throughout the mine can be obtained.

[0042] 3D visualization of gas concentration: Based on real-time calculated gas concentration distribution data, the system generates a continuous, dynamically changing 3D gas concentration cloud map in a 3D scene. The exercise system supports user-defined color change ranges to distinguish different concentration levels. Simultaneously, it allows users to set concentration warning values; the system will automatically highlight areas exceeding gas limits, providing exercise personnel with an intuitive understanding of the disaster situation and assisting their decision-making.

[0043] Step 4: Simulate device damage in a virtual scenario Finally, this method also includes simulating the destruction of equipment in a virtual scene based on shock wave pressure. This is a crucial step in realizing the chain reaction of disaster propagation, such as a damper collapsing and causing airflow reversal. The specific implementation method is as follows: First, establish a database of equipment failure states. This database is based on experimental data or real accident scene information. Then, use 3DMax to create failure state models for each piece of equipment under different failure pressure levels (e.g., 0, 0.2 MPa, 0.4 MPa, 0.6 MPa, 0.8 MPa, 1 MPa and above).

[0044] Secondly, add destruction effect triggers to each device in the virtual scene (i.e., the one built in step one). During the exercise, when the shock wave pressure at the location of a certain device (i.e., the pressure calculated in step 3.1) is triggered... y When the pressure threshold set by the trigger is reached, the trigger is activated. After activation, the system will automatically call the pre-built equipment failure state model or animation corresponding to the current pressure level from the equipment failure state database. For example, the intact damper model in the virtual scene will be switched to the animation of a collapsed failure state.

[0045] Through the above steps, this method achieves high-fidelity simulation of the entire process from disaster triggering and dynamic evolution to chain reaction, providing a dynamic environment for emergency drills that is highly matched with real rescue.

[0046] Example 2: Embodiment 2 of the present invention provides a coal mine emergency drill system based on dynamic disaster chain simulation. This system is the hardware and software carrier for implementing the method described in Embodiment 1. Please refer to the following references. Figure 1 and Figure 2The system includes the following modules: (1) 3D scene construction module This module is used to perform step one in Example 1, namely, constructing a 3D scene of the mine before the disaster. It integrates parametric modeling and laser point cloud modeling technologies, and has a built-in 3D model library of standard equipment such as coal mining machines, supports, and ventilation doors.

[0047] (2) Parameter input module This module is used to execute step two in Example 1, providing an interactive interface for users to input various basic parameters of the outburst before the exercise begins, including the outburst location, the amount of coal body outburst, the gas emission rate, and the original gas pressure.

[0048] (3) Dynamic simulation module This is the system's core computing engine, corresponding to... Figure 1 The module shown is a "Coal and Gas Outburst Simulation Calculation Module". This module runs in the background in real time and is responsible for calculating the disaster process. It receives initial data from the parameter input module and performs simulation. This module mainly consists of three units: Shock wave simulation unit: used to calculate the propagation and pressure distribution of shock waves in the roadway in real time. The calculation method is as described in step 3.1 of Example 1, including... Iterative calculations and corrections.

[0049] Coal Throwing Simulation Unit: Used to simulate the throwing, transport, and accumulation of broken coal. It utilizes particle systems and GPU-accelerated VFX collision event technology to achieve efficient rendering of large-scale particles.

[0050] Gas diffusion simulation unit: Used to calculate the dynamic diffusion and concentration distribution of gas flow. It employs the nodal mixing concentration formula. Perform full network solution.

[0051] (4) Equipment damage simulation module This module is used to simulate the physical damage to downhole equipment caused by disasters. It contains an equipment failure state database that stores failure models of the equipment under different pressures. The module receives pressure data from the shock wave simulation unit in real time and invokes the corresponding failure model according to preset trigger logic.

[0052] (5) Visualization module This module corresponds to Figure 2 The "Highlighting Disaster 3D Virtual Scene Module" shown is the front end of the system, responsible for graphically rendering all the backend calculation results and presenting them to the exercise users.

[0053] System Workflow The workflow of this system is clearly displayed in Figure 1 and Figure 2 middle.

[0054] First, before the drill begins, the 3D scene construction module completes scene initialization, and the parameter input module completes the setting of initial disaster parameters.

[0055] After the exercise began, the dynamic simulation module ( Figure 1 The simulation begins operation. Based on the set simulation time, it performs a coal and gas outburst simulation and calculates and updates the shock wave pressure, gas concentration distribution, and coal mass distribution data in real time after the outburst. Simultaneously, the visualization module (…) Figure 2 As a "3D mine scene", the dynamic simulation module reads data in real time. Figure 1 The output calculation results. After receiving the data, the visualization module divides the data into three paths for parallel processing: (1) Processing concentration data: The visualization module dynamically generates a gas concentration cloud map in the three-dimensional scene based on the output of the gas diffusion simulation unit, and highlights the gas exceeding the limit area according to the warning value.

[0056] (2) Processing pressure data: Based on the output of the shock wave simulation unit, the visualization module performs "shock wave effect performance", such as UV distortion, radial blur and screen shaking mentioned in Example 1; on the other hand, it transmits the pressure data to the equipment damage simulation module, which calls the equipment damage database and plays the corresponding damage state animation.

[0057] (3) Processing coal body distribution data: Based on the output results of the coal body throwing simulation unit, the visualization module calls the crushed coal body preform in the particle system to render the dynamic throwing and accumulation distribution of the crushed coal body after the outburst in the three-dimensional scene.

[0058] Through the collaborative work of the above modules, this system successfully transforms static drill scenarios into dynamic, evolving disaster processes, providing drill participants with a highly realistic interactive training environment.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A coal mine emergency drilling method based on dynamic catastrophe chain simulation, characterized in that: Includes the following steps: Construct a 3D scene of the mine before the disaster, the 3D scene including roadways and equipment models within the roadways; Enter the basic parameters of coal and gas outburst, including outburst location, outburst coal volume, gas emission volume, and initial gas pressure; Dynamic simulation of coal and gas outburst process, the dynamic simulation includes: simulating the dynamic propagation of shock wave after outburst, and calculating the pressure of shock wave at different locations in the roadway; The process of throwing broken coal after an outburst is simulated to reproduce the dynamic migration and distribution of pulverized coal; the dynamic diffusion and spread of high-pressure gas flow after an outburst is simulated to calculate the concentration distribution of gas in the roadway. Based on the pressure of the shock wave, the damage state of the equipment in the three-dimensional scene is simulated.

2. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 1, characterized in that: The steps for simulating the dynamic propagation of the shock wave after an outburst include: Based on the shock wave overpressure peak attenuation model Calculate the pressure of the shock wave at a distance x from the bulge. ,in This is the attenuation correction factor. The distance from the protrusion. This refers to the maximum pressure at the protrusion point after the shock wave emerges; the... according to The calculation yielded, where The initial pressure of the tunnel, For the corrected overpressure at the protrusion; the according to Perform calculations, where To highlight the cross-sectional area, The cross-sectional area of ​​the alleyway. The specific heat ratio of air. Under ideal conditions, the outlet pressure is excessive; according to It was calculated using an iterative algorithm, where To highlight the gas pressure in the hole, For the specific heat ratio of gas, , For gas temperature, The gas constant is It is a parameter.

3. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 1, characterized in that: The method also includes using Shader Graph technology to perform UV distortion in the area through which the shock wave passes, and adding radial blur and screen dithering to simulate the visual effect of a shock wave.

4. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 1, characterized in that: The steps for simulating the throwing process of broken coal after an outburst include: establishing a coal body model at the outburst location; loading a pre-formed coal block using a particle system and setting physical properties for the particles, including explosive force, gravity, density, and rigid body characteristics; and performing collision detection using GPU-accelerated visual effects VFX collision events to render the movement of large-scale coal powder particles.

5. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 1, characterized in that: The step of calculating the concentration distribution of gas in the roadway includes: for roadway nodes ,according to Calculate the gas concentration after inflow mixing. ;in, Representative node Inflow branch, For nodes The number of inflow branches, for Branch gas concentration, for Branch gas flow, For nodes The source strength of the gas.

6. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 5, characterized in that: The method further includes: generating a three-dimensional gas concentration cloud map based on the calculated gas concentration distribution data, and highlighting the gas exceeding the limit area according to the concentration warning value set by the user.

7. The coal mine emergency drill method based on dynamic disaster chain simulation according to claim 1, characterized in that: The steps for simulating the damage state of the device in the three-dimensional scene include: Establish a database of equipment failure states, which stores models of equipment failure states under different failure pressures; Add a destruction effect trigger to the device model; When the shock wave pressure at the location of the device reaches the pressure value set by the trigger, the corresponding damage state model in the database is invoked to display the damage state of the device.

8. A coal mine emergency drill system based on dynamic disaster chain simulation, characterized in that: include: A 3D scene construction module is used to construct a pre-disaster 3D scene of the mine, which includes roadways and equipment models within the roadways; The parameter input module is used to input the basic parameters of coal and gas outbursts, including outburst location, outburst coal volume, gas emission volume, and original gas pressure. The dynamic simulation module is used to dynamically simulate the coal and gas outburst process. The dynamic simulation module includes: a shock wave simulation unit, which is used to simulate the dynamic propagation of the shock wave after the outburst and calculate the pressure of the shock wave at different locations in the roadway. The coal throwing simulation unit is used to simulate the throwing process of broken coal after an outburst, and reproduce the dynamic migration and distribution of pulverized coal; The gas diffusion simulation unit is used to simulate the dynamic diffusion and spread of high-pressure gas flow after an outburst, and to calculate the concentration distribution of gas in the roadway. The equipment damage simulation module is used to simulate the damage state of the equipment in the three-dimensional scene based on the pressure of the shock wave. The visualization module is used to receive the output data from the dynamic simulation module and the equipment damage simulation module, and to generate and display a three-dimensional virtual scene of the dynamic exercise.

9. The coal mine emergency drill system based on dynamic disaster chain simulation according to claim 8, characterized in that: The shock wave simulation unit is specifically used for: Based on the shock wave overpressure peak attenuation model Calculate the shock wave at the distance from the protrusion Pressure at the location ,in This is the attenuation correction factor. The distance from the protrusion. This represents the maximum pressure at the protrusion point after the shock wave emerges; according to Calculate the ,in The initial pressure of the tunnel, For the corrected overpressure at the protrusion; according to Calculate the ,in To highlight the cross-sectional area, The cross-sectional area of ​​the alleyway. The specific heat ratio of air. For ideal conditions, the outlet overpressure is expected; and according to Calculate the using iterative algorithm ,in To highlight the gas pressure in the hole, For the specific heat ratio of gas, , For gas temperature, The gas constant is It is a parameter.

10. The coal mine emergency drill system based on dynamic disaster chain simulation according to claim 8, characterized in that: The coal throwing simulation unit is specifically used for: Establish a coal seam model in a prominent location; A pre-formed coal block crushing material is loaded using a particle system, and physical properties are set for the particles, including explosive force, gravity, density, and rigid body properties. Collision detection is performed using VFX collision events, a visualization effect accelerated by the graphics processing unit (GPU), to render the movement of large-scale coal dust particles.

11. The coal mine emergency drill system based on dynamic disaster chain simulation according to claim 8, characterized in that: The gas diffusion simulation unit is specifically used for: for roadway nodes ,according to Calculate the gas concentration after inflow mixing. ;in, Representative node Inflow branch, For nodes The number of inflow branches, for Branch gas concentration, for Branch gas flow, For nodes The source strength of the gas.

12. The coal mine emergency drill system based on dynamic disaster chain simulation according to claim 8, characterized in that: The equipment damage simulation module is specifically used for: establishing an equipment damage state database, which stores equipment damage state models under different damage pressures; adding damage effect triggers to the equipment models; and when the shock wave pressure at the location of the equipment reaches the pressure value set by the trigger, calling the corresponding damage state model in the database to display the equipment damage state.

13. The coal mine emergency drill system based on dynamic disaster chain simulation according to claim 8, characterized in that: The visualization module is specifically used to: use Shader Graph technology to perform UV distortion, add radial blur and screen dithering to display the visual effect of the shock wave; generate a three-dimensional gas concentration cloud map and highlight the gas exceeding the limit area; Render the dynamic migration distribution of the broken coal body.

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