Chemical accident emergency rescue path determination method, device, equipment and medium

Abstract

The application provides a chemical accident emergency rescue path determination method, device, equipment and medium, and relates to the field of emergency rescue. The method comprises the following steps: after a chemical accident occurs, an initial accident facility and an initial thermal radiation injury field of the chemical accident are determined; according to the initial thermal radiation injury field, a secondary accident probability of a plurality of other chemical facilities around the initial accident facility and an explosion overpressure field are determined; based on the secondary accident probability and the explosion overpressure field, a first personnel death probability distribution field in an accident range corresponding to the chemical accident is determined; and based on the first personnel death probability distribution field, an emergency rescue path of the chemical accident is determined. By calculating the development of the initial accident, the personnel death probability field formed by the secondary accident in the entire accident area is analyzed, the best rescue path is determined, and the problems that there is a lack of clear theoretical basis and specific analysis method for the approach and departure paths of emergency vehicles and personnel in the accident rescue are solved.

Description

Technical Field

[0001] The present application relates to the field of emergency rescue, and in particular to a method, device, equipment and medium for determining an emergency rescue path for a chemical accident. Background Art

[0002] Due to the high energy distribution density in areas with dense chemical facilities, initial accidents often induce secondary accident risks, which brings huge challenges to emergency rescue of chemical accidents. Failure to consider the risks of secondary accidents during emergency rescue may usually lead to serious obstruction of accident rescue and even cause serious casualties.

[0003] Among them, the choice of entry and exit routes for emergency vehicles and emergency personnel is greatly affected by the risk of secondary accidents. Improper route selection may cause emergency vehicles and emergency personnel to suffer sudden secondary accident injuries while on the road, and cause damage to emergency forces and delay accident rescue.

[0004] In the existing technology, the entry and exit routes of emergency vehicles and personnel during accident rescue are mostly determined according to the company's accident plan or based on the experience of on-site command, lacking a clear theoretical basis. Some studies have shown that the selection of relevant paths needs to consider the influence of the domino effect, but no specific analysis method is given, resulting in the inability to obtain a clear path determination method. Summary of the Invention

[0005] The present application provides a method, device, equipment and medium for determining emergency rescue paths for chemical accidents, which are used to solve the technical problem that the existing technology lacks a clear theoretical basis and specific analysis method for the entry and exit paths of emergency vehicles and personnel during accident rescue.

[0006] In a first aspect, the present application provides a method for determining a chemical accident emergency rescue path, the method comprising:

[0007] After a chemical accident occurs, determining an initial accident facility and an initial thermal radiation damage field of the chemical accident, wherein the initial accident facility is used to indicate a first chemical facility where the chemical accident first occurs;

[0008] Determining, based on the initial thermal radiation damage field, the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility;

[0009] Determining, based on the secondary accident probability and the explosion overpressure field, a first probability distribution field of human death within the accident range corresponding to the chemical accident, wherein the first probability distribution field of human death is used to indicate the probability distribution field of human death caused by a secondary accident caused by the chemical accident;

[0010] Based on the first personnel death probability distribution field, an emergency rescue path for the chemical accident is determined.

[0011] In one possible implementation, determining the initial accident facility and the initial thermal radiation damage field of the chemical accident includes:

[0012] Determine the initial accident facility of the chemical accident and the corresponding chemical accident type, wherein the chemical accident type is not limited to: pool fire, jet fire;

[0013] A corresponding accident consequence model is determined based on the chemical accident type, and the initial thermal radiation damage field is calculated using the accident consequence model.

[0014] In a possible implementation, determining the probability distribution field of the first person's death within the accident range based on the secondary accident probability and the explosion overpressure field includes:

[0015] Based on the explosion overpressure field, determining an accident range corresponding to the chemical accident, and dividing the accident range into a plurality of accident points, wherein the accident points are used to indicate any point within the accident range;

[0016] Determining explosion overpressure values ​​and corresponding human mortality probabilities at a plurality of the accident points, wherein the human mortality probability indicates the probability of human mortality resulting from a secondary accident caused by the chemical accident;

[0017] According to the death probabilities corresponding to the multiple accident points, a first death probability distribution field within the accident range is obtained.

[0018] In a possible implementation, determining the probability of death of personnel corresponding to the plurality of accident points includes:

[0019] determining, based on the explosion overpressure values ​​of the plurality of accident points, the ideal probability of death of personnel corresponding to the plurality of accident points;

[0020] Based on the secondary accident probability and the plurality of ideal death probabilities, the death probabilities corresponding to the plurality of accident points are obtained.

[0021] In one possible implementation, the method further includes:

[0022] For any one of the multiple other chemical facilities, the chemical facility is regarded as a secondary accident facility;

[0023] Determining a second probability distribution field of personnel death corresponding to the secondary accident facility, where the second probability distribution field of personnel death is used to indicate a probability distribution field of personnel death caused by a secondary accident resulting from a chemical accident occurring at the secondary accident facility;

[0024] The first death probability distribution field and the second death probability distribution field are superimposed to obtain a processed first death probability distribution field.

[0025] In a possible implementation, the emergency rescue path includes an approach path and an exit path. Determining the emergency rescue path for the chemical accident based on the first personnel death probability distribution field includes:

[0026] Determining emergency rescue points for the chemical accident, and determining multiple rescue paths based on the first probability distribution field of death of personnel, wherein the emergency rescue points are used to indicate the mission points for emergency rescue personnel to perform rescue operations during the chemical accident rescue process;

[0027] Determine a first path priority for each rescue path, and use the rescue path with the highest first path priority as the departure path, wherein the first path priority is determined based on the length of the rescue path and the degree of hazard of the path.

[0028] In one possible implementation, the method further includes:

[0029] When the departure path is determined, the second path priority of other rescue paths is determined, and the rescue path with the highest second priority is used as the approach path, wherein the second path priority is determined based on the departure direction, path length and path hazard level corresponding to the departure path.

[0030] In a second aspect, the present application provides a device for determining a chemical accident emergency rescue path, the device comprising:

[0031] A determination module is used to determine the initial accident facility and the initial thermal radiation damage field of the chemical accident after the chemical accident occurs, wherein the initial accident facility is used to indicate the first chemical facility where the chemical accident first occurs;

[0032] The determination module is further configured to determine, based on the initial thermal radiation damage field, the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility;

[0033] The determination module is further configured to determine, based on the secondary accident probability and the explosion overpressure field, a first probability distribution field of human death within the accident range corresponding to the chemical accident, wherein the first probability distribution field of human death is configured to indicate a probability distribution field of human death resulting from a secondary accident caused by the chemical accident;

[0034] The determination module is further configured to determine an emergency rescue path for the chemical accident based on the first personnel death probability distribution field.

[0035] In a possible implementation, the device further includes: a calculation module;

[0036] The determination module is further configured to determine the initial accident facility of the chemical accident and the corresponding chemical accident type, wherein the chemical accident type is not limited to: pool fire, jet fire;

[0037] The determination module is further configured to determine a corresponding accident consequence model based on the chemical accident type;

[0038] The calculation module is used to calculate the initial thermal radiation damage field using the accident consequence model.

[0039] In a possible implementation, the determination module is further configured to determine an accident range corresponding to the chemical accident based on the explosion overpressure field, and divide the accident range into a plurality of accident points, where the accident points are used to indicate any point within the accident range;

[0040] The determination module is further configured to determine explosion overpressure values ​​and corresponding probability of death of personnel at a plurality of the accident points, wherein the probability of death of personnel is used to indicate the probability of death of personnel due to a secondary accident caused by the chemical accident;

[0041] The determination module is further configured to obtain a first probability distribution field of death within the accident range based on the probability of death of personnel corresponding to the plurality of accident points.

[0042] In a possible implementation manner, the determination module is further configured to determine the ideal probability of death of personnel corresponding to the multiple accident points based on the explosion overpressure values ​​of the multiple accident points;

[0043] The determination module is further configured to obtain the probability of death of personnel corresponding to the multiple accident points based on the secondary accident probability and the multiple ideal probability of death of personnel.

[0044] In a possible implementation, the determining module is further configured to, for any one of a plurality of other chemical facilities, identify the chemical facility as a secondary accident facility;

[0045] The determination module is further configured to determine a second probability distribution field of personnel death corresponding to the secondary accident facility, wherein the second probability distribution field of personnel death is used to indicate a probability distribution field of personnel death caused by a secondary accident resulting from a chemical accident occurring at the secondary accident facility;

[0046] The determining module is further configured to perform superposition processing on the first personnel death probability distribution field and the second personnel death probability distribution field to obtain a processed first personnel death probability distribution field.

[0047] In a possible implementation, the emergency rescue path includes an approach path and a departure path, and the determining module is further configured to determine an emergency rescue point of the chemical accident, and determine a plurality of rescue paths according to the first probability distribution field of personnel death, the emergency rescue point being used to indicate a task point of an emergency rescuer in a rescue process of the chemical accident.

[0048] The determining module is further configured to determine a first path priority of each rescue path, and take a rescue path with the highest first path priority as the departure path, wherein the first path priority is determined based on a path length of the rescue path and a degree of harm along the rescue path.

[0049] In a possible implementation, the determining module is further configured to, in a case where the departure path is determined, determine a second path priority of other rescue paths, and take a rescue path with the highest second path priority as the approach path, wherein the second path priority is determined based on a departure direction corresponding to the departure path, a path length, and a degree of harm along the rescue path.

[0050] In a third aspect, an embodiment of the present application provides a chemical accident emergency rescue path determination device, including a memory and a processor.

[0051] The memory is configured to store computer execution instructions.

[0052] The processor executes the computer execution instructions stored in the memory, so that the processor executes the first aspect and / or various possible implementations of the first aspect.

[0053] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementations of the first aspect.

[0054] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, and the computer program is executed by a processor to implement the first aspect and / or various possible implementations of the first aspect.

[0055] The method for determining the emergency rescue path of a chemical accident provided by the present application is as follows: after a chemical accident occurs, the initial accident facility and the initial thermal radiation damage field of the chemical accident are determined, the initial accident facility is used to indicate the first chemical facility where the chemical accident occurs; based on the initial thermal radiation damage field, the secondary accident probability and the explosion overpressure field of multiple other chemical facilities around the initial accident facility are determined; based on the secondary accident probability and the explosion overpressure field, the first personnel death probability distribution field within the accident range corresponding to the chemical accident is determined, the first personnel death probability field is used to indicate the probability distribution field of personnel death caused by the secondary accident caused by the chemical accident; based on the first personnel death probability distribution field, the emergency rescue path of the chemical accident is determined. By calculating the initial accident development, analyzing the personnel death probability field formed by the secondary accident in the entire accident area, and determining the optimal rescue path, the problem of the lack of a clear theoretical basis and specific analysis method for the entry and exit paths of emergency vehicles and personnel during accident rescue is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0057] Figure 1 A schematic diagram of the scenario of the method for determining the chemical accident emergency rescue path provided in this application;

[0058] Figure 2 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 1 ;

[0059] Figure 3 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 2 ;

[0060] Figure 4 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 3 ;

[0061] Figure 5 A schematic diagram of the structure of the device for determining the emergency rescue path for chemical accidents provided in this application;

[0062] Figure 6 This is a schematic diagram of the structure of the chemical accident emergency rescue path determination equipment provided in this application.

[0063] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0064] The exemplary embodiments will be described in detail herein, with examples shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the accompanying embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0065] The terms "first," "second," "third," "fourth," and so forth (if any) in the present description and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0066] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0067] First, let’s explain the terms involved in this application:

[0068] Thermal radiation refers to the phenomenon in which objects radiate electromagnetic waves due to their temperature. Any object with a temperature above absolute zero produces thermal radiation. The higher the temperature, the greater the total energy radiated and the greater the shortwave component. Thermal radiation is one of three modes of heat transfer, the other two being conduction and convection.

[0069] A secondary accident overpressure field: This refers to the sudden increase in surrounding pressure caused by pressure changes and gas release at the accident site after the first accident, creating an overpressure zone. This overpressure field poses a serious threat to the surrounding environment and personnel safety.

[0070] A boiling liquid expanding vapor cloud explosion (BLEVE) occurs when the temperature of liquid and vapor within a pressure vessel is above its normal boiling point. When the liquid in a pressure vessel is superheated, well above its normal boiling point, and the vessel walls are cracked or damaged, the superheated liquid rapidly vaporizes, forming a vapor cloud that can cause an explosion.

[0071] Due to the high energy distribution density in areas with dense chemical facilities, initial accidents often induce secondary accident risks, which brings huge challenges to emergency rescue of chemical accidents. Failure to consider the risks of secondary accidents during emergency rescue may usually lead to serious obstruction of accident rescue and even cause serious casualties.

[0072] In the existing technology, the entry and exit routes of emergency vehicles and personnel during accident rescue are mostly determined according to the company's accident plan or based on the experience of on-site command, lacking a clear theoretical basis. Some studies have shown that the selection of relevant paths needs to consider the influence of the domino effect, but no specific analysis method is given, resulting in the inability to obtain a clear path determination method.

[0073] In response to the above problems, the present application provides a method for determining emergency rescue paths for chemical accidents. By calculating the thermal radiation damage field of the initial accident, the probability of secondary accident effects of the chemical facilities of the initial accident and the surrounding chemical energy facilities is determined based on the accident effect, and the overpressure field caused by the secondary accident is calculated. The probability of death of each person within the accident range under the secondary accident is obtained by combining the probability equation of death of personnel, and a cloud map of the probability of death of personnel is drawn. The optimal rescue path is determined by combining the location of the rescue point with the cloud map of the probability of death of personnel. The quantitative calculation method directly provides a method for selecting the entry and exit paths of emergency vehicles and personnel. Compared with the empirical judgment method, it has a better theoretical basis and the results are more reliable.

[0074] Figure 1 A schematic diagram of a scenario for determining a chemical accident emergency rescue path provided in this application. The dotted line portion represents a probability cloud map of the risk of casualties caused by the injury field resulting from the initial accident and the secondary accident. After a chemical accident occurs at the initial accident facility, the probability of secondary accidents occurring in other surrounding chemical facilities can be determined based on the calculation of the thermal radiation injury field of the initial accident, and the overpressure field caused by a secondary accident can be calculated. Based on the above calculation, the probability of death at each point in the figure can be obtained, and a cloud map of the probability of death can be drawn, i.e., the dotted area circled in the figure. Multiple rescue paths can be obtained based on the emergency rescue points corresponding to the predetermined initial accident combined with the cloud map of the probability of death. By further analyzing the multiple paths combined with the cloud map, the two best paths are determined as the rescue (entry / exit) paths for the chemical accident, solving the current problem of lacking a clear theoretical basis and specific analysis methods for the entry and exit paths of emergency vehicles and personnel during accident rescue.

[0075] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0076] Figure 2 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 1 .like Figure 1 As shown, the method for determining a chemical accident emergency rescue path provided by the embodiment of the present application includes:

[0077] S201. After a chemical accident occurs, determine the initial accident facilities and initial thermal radiation damage field.

[0078] The initial accident facility is used to indicate the first chemical facility where a chemical accident occurs. Chemical accidents usually cause damage to surrounding targets through fire heat radiation, explosion shock waves, and explosion debris, which in turn triggers secondary accidents.

[0079] It is understandable that compared with the extremely fast explosion damage, the development rate of fire is slower and it takes a certain amount of time to cause significant damage to people. Personnel can make temporary strategic adjustments according to the development of the fire during their actions. Therefore, when setting the personnel's travel path, only the secondary accident damage of the explosion type needs to be considered. Therefore, this solution mainly considers the chemical accident type with a slower development rate or controllable rescue risk in the setting, but the accident type to which this solution is applicable is not limited in this application.

[0080] Specifically, after a chemical accident occurs, the corresponding classic accident consequence model can be determined based on the accident type corresponding to the chemical accident. By inputting relevant parameters of the accident facility (such as combustion rate, explosion intensity, etc.) and environmental parameters (such as wind speed, wind direction, etc.), the model can calculate the range and intensity of the thermal radiation damage field.

[0081] S202. Determine the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility based on the initial thermal radiation damage field.

[0082] The thermal radiation from the initial accident may trigger secondary accidents at various types of energetic facilities. Based on the type, scale, and accident state (e.g., combustion, explosion, etc.) of the initial accident facility, a thermal radiation propagation model is used to calculate the scope and intensity of its thermal radiation damage field. Information about the materials, structures, and safety protection devices of surrounding chemical facilities is also determined to assess their tolerance to thermal radiation. This may include, for example, the facility's fire protection rating and the effectiveness of thermal radiation shielding. Combining the thermal radiation damage field of the initial accident facility with the tolerance of surrounding chemical facilities, probabilistic statistical methods are used to calculate the probability of secondary accidents.

[0083] It is understandable that the impact of thermal radiation on other chemical facilities can be comprehensively evaluated through thermal failure thresholds and thermal response time. For example, based on equipment design requirements, the thermal failure temperature or heat flux threshold of different equipment can be determined, such as the thermal failure temperature of atmospheric pressure storage tanks. This can cause deformation of the tank or tripping of the safety valve. Thermal radiation in the pressure vessel causes a sudden increase in internal pressure, which can cause an explosion when it exceeds the design pressure. During the parameter assessment process, a domino effect model can be used to calculate the probability of secondary accidents at multiple chemical facilities surrounding the initial accident facility.

[0084] Different energetic facilities can generate different forms of secondary accidents under the influence of thermal radiation. For example, atmospheric pressure vessels often experience overpressure explosions under the influence of thermal radiation, followed by liquid pool fires. Pressure vessels can experience overpressure explosions or BLEVEs, which may further lead to pool fires. The types of different energetic facilities can be used to determine the type of secondary accident that occurs at these facilities. For example, these can include fireball explosions, steam cloud explosions, or BLEVEs. Different overpressure field calculation models are used for different accident types. Using these calculation models, we can derive the explosion overpressure fields of multiple other chemical facilities.

[0085] S203. Based on the secondary accident probability and the explosion overpressure field, determine the probability distribution field of the first person's death within the accident range corresponding to the chemical accident.

[0086] The primary fatality probability field indicates the probability distribution of fatalities resulting from secondary accidents caused by a chemical accident. The explosion overpressure field can be used to determine the corresponding explosion overpressure values ​​for multiple points within the accident range. According to relevant standards and research, different overpressure values ​​cause varying degrees of harm to personnel. Generally speaking, an overpressure of 0.05 MPa may cause minor injuries; 0.1 MPa will result in moderate injuries, such as ruptured eardrums and internal organ damage; and exceeding 0.21 MPa is associated with a high probability of death. A quantitative relationship between overpressure value and probability of fatality can be established based on specific experimental data and research results.

[0087] It is understandable that the accident range can be divided into several small calculation units. Each unit can be a fixed-size square or rectangular area, or even a point, to facilitate numerical calculation and analysis. Regarding the impact of explosion overpressure, the relationship function between overpressure and death probability is constructed based on the explosion overpressure value within the unit, and the probability of death due to overpressure can be calculated. Since the occurrence of overpressure explosions is based on the occurrence of secondary accidents, the prediction of the probability of death needs to be corrected by the probability of secondary accidents, thereby obtaining the probability of death due to overpressure in the event of a secondary accident.

[0088] Based on the probability of death at multiple points, the calculation results of the probability of death of each calculation unit can be spatially interpolated and visualized to draw a field map of the probability of death to intuitively show the distribution of the probability of death in different areas within the accident range.

[0089] Optionally, each point may be affected by secondary accidents of multiple energy-containing facilities. Therefore, it is necessary to superimpose and determine the overpressure field and secondary accident probability of each point to more accurately estimate the probability of death at each point.

[0090] S204: Determine an emergency rescue route for the chemical accident based on the first death probability distribution field.

[0091] The method combines the actual locations of emergency rescue points with a contour map of fatality probability to plot various potential routes. By analyzing each path, the distance required to travel from the rescue point to the acceptable fatality probability boundary can be determined. The shorter the distance, the higher the priority of the selection.

[0092] It is understandable that the accident range can be divided into different areas, such as high death probability area, medium death probability area and low death probability area, based on the first person death probability distribution field. For example, the area with a death probability of more than 80% can be regarded as a high death probability area, 30%-80% is a medium death probability area, and less than 30% is a low death probability area. Based on the distribution trend of the death probability, the direction and gradient of the increase or decrease in the death probability are determined, and the rules for path selection can be determined. For example, the rescue path should avoid possible dangerous areas, and the shortest and most unobstructed path should be selected as much as possible to reduce rescue time. However, in chemical accidents, the shortest path is not necessarily the best path. Factors such as road conditions, obstacles, fire spread, and rescue and evacuation convenience must also be considered. The specific path selection is not limited by this application and can be selected according to actual rescue needs.

[0093] Optionally, a preliminary rescue route can be planned based on the above principles, combined with the death probability distribution field and on-site geographic information. For example, enter from the upwind direction or relatively safe direction of the accident site, and gradually advance to the area with high death probability. For multiple rescue points in the area with high death probability, rescue is carried out in order from high to low death probability or from low to high rescue difficulty. In addition, a detailed analysis can be conducted on possible obstacles on the path, such as collapsed buildings, damaged equipment, flowing hazardous chemicals, etc. For obstacles that cannot be avoided, corresponding clearance or crossing plans can be formulated to ensure that rescue vehicles and personnel can pass smoothly. Professional emergency rescue simulation software can also be used to simulate the formulated rescue path. For example, by inputting data such as accident scenes, personnel distribution, environmental factors, etc., the rescue action process of rescue personnel under different paths can be simulated, and indicators such as rescue time and casualties can be evaluated to optimize the rescue path. The specific process of path optimization will not be repeated in this application.

[0094] The method for determining the emergency rescue path of a chemical accident provided by an embodiment of the present application, after a chemical accident occurs, determines the initial accident facility and the initial thermal radiation damage field of the chemical accident, the initial accident facility is used to indicate the first chemical facility where the chemical accident occurs; based on the initial thermal radiation damage field, determines the secondary accident probability and explosion overpressure field of multiple other chemical facilities around the initial accident facility; based on the secondary accident probability and the explosion overpressure field, determines the first personnel death probability distribution field within the accident range corresponding to the chemical accident, the first personnel death probability field is used to indicate the probability distribution field of personnel death caused by the secondary accident under the action of the chemical accident; based on the first personnel death probability distribution field, determines the emergency rescue path of the chemical accident. By calculating the initial accident development situation, analyzing the personnel death probability field formed by the secondary accident in the entire accident area, and determining the optimal rescue path, the problem of the lack of a clear theoretical basis and specific analysis method for the entry and exit paths of emergency vehicles and personnel during accident rescue is solved.

[0095] Figure 3 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 2 This embodiment is based on Figure 2 Based on the embodiment, the method for determining the emergency rescue path of a chemical accident is described in detail. Figure 3 As shown, the method for determining a chemical accident emergency rescue path provided by the embodiment of the present application includes:

[0096] S301. After a chemical accident occurs, determine the initial accident facility and the corresponding chemical accident type.

[0097] Chemical accident types include, but are not limited to, pool fires and jet fires. The initial accident facility indicates the first chemical facility where a chemical accident occurred. The type of chemical accident can be determined based on the specific manifestations and characteristics of the accident.

[0098] Understandably, the type of accident can be determined based on on-site analysis. For example, by observing the flame shape and combustion characteristics, if the scene shows a large, relatively stable flame, the flame height is relatively low and basically in the same plane, the burning area resembles a "pool", there is no obvious spray or jet phenomenon, there are traces of liquid flow around, and there are burnt residues on the ground, etc., it is likely a pool fire. When a strong, jet-like flame is seen ejected at high speed from a specific location, the flame has obvious directionality and a high ejection height, accompanied by a whistling sound, etc., it can usually be judged as a jet fire.

[0099] S302. Determine a corresponding accident consequence model based on the type of chemical accident, and use the accident consequence model to calculate and obtain an initial thermal radiation damage field.

[0100] For fire accidents, such as pool fires (pool fires) caused by the leakage of flammable liquids or fusible combustible solids, and jet fires caused by the leakage of pressurized gases or liquids, corresponding accident consequence models can be used for calculations. For pool fires or jet fires, a fire thermal radiation model can be used to calculate the initial thermal radiation damage field. This typically requires considering factors such as the flame's radiation intensity, the distance between the flame and the illuminated object, and the object's thermal radiation absorptivity. Through calculations, the thermal radiation intensity of the illuminated object at different distances can be determined, thereby assessing the degree of damage to personnel and equipment caused by thermal radiation.

[0101] It is understandable that if the chemical accident type is determined to be a pool fire, the thermal radiation damage field can be calculated using the pool fire calculation model, and the heat flux formula received by the target can be recorded as: ,in, represents the heat flux received by the target, For example, the level of the target to the leak center, is the viewing angle factor.

[0102] Optionally, if the chemical accident type is determined to be a vertical jet fire, the thermal radiation damage field can be calculated using the vertical jet fire calculation model, and the target receiving thermal radiation flux can be recorded as ,in, Indicates distance The thermal radiation flux received by the initial target, is the atmospheric transmission rate, is the thermal radiation coefficient, is the mass flow rate of the fuel, Indicates the heat of combustion, The remaining chemical accident types can all be calculated using the corresponding accident consequence models to obtain the corresponding thermal radiation damage fields, which will not be elaborated in this application.

[0103] S303. Determine the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility based on the initial thermal radiation damage field.

[0104] Under the influence of thermal radiation, existing domino effect models can be used to calculate the probability of secondary accidents occurring in different types of energetic facilities under the influence of thermal radiation. Domino effect models describe the chain reaction following an accident. This model can be used to predict how an accident at one chemical facility will trigger secondary accidents at other facilities, ultimately leading to a wider impact.

[0105] It is understandable that by calculating the thermal radiation intensity and combining it with the equipment's heat resistance (such as equipment material, insulation measures, etc.), we can estimate the impact of thermal radiation on surrounding facilities. The probability of a domino effect can be estimated using the following formula:

[0106] If the energy-containing facility is a normal pressure facility, the calculation formula can be expressed as: ;in, ;

[0107] If the energy-containing facility is a pressure-containing facility, the calculation formula can be expressed as: ;in, ;

[0108] In the formula is the probability of secondary accidents, is the thermal radiation intensity, The time of the accident, is the container volume.

[0109] Optionally, the likelihood of a secondary explosion can be determined based on the calculated probability of secondary accidents, as well as factors such as the type of surrounding chemical facilities, the properties of stored materials, and the effects of thermal radiation. This can help identify chemical facilities at risk of secondary accidents. For example, if the pressure in a storage tank containing flammable or explosive gases continues to rise under the influence of thermal radiation and exceeds the tank's tolerance limit, an explosion may occur. By analyzing the energy and explosion forms (such as vapor cloud explosions and fireball explosions) that may be released in other chemical facilities during secondary explosion accidents, and using explosion overpressure calculation models (such as the TNT equivalent method and multiphase flow models) to calculate the explosion overpressure field generated by the explosion source, the intensity distribution of the explosion overpressure field can be determined, including overpressure values ​​at different distances.

[0110] Specifically, for example, if it is determined that a secondary explosion may occur, an appropriate explosion overpressure calculation model, such as the TNT equivalent method or the Baker-Strehlow model, can be selected. The TNT equivalent method equates the explosive material to a certain amount of TNT explosives and calculates the overpressure generated by the chemical facility explosion based on the overpressure calculation formula for TNT explosive explosions. By determining the relevant parameters of the explosion source, such as the amount of explosive material, explosion energy, etc., as well as the surrounding environmental parameters such as air density and temperature, these parameters are substituted into the selected explosion overpressure calculation model. The explosion overpressure values ​​are calculated at different distances and directions with the facility where the secondary explosion may occur as the center, thereby determining the distribution of the explosion overpressure field.

[0111] One possible implementation approach, based on the domino effect model, can incorporate time considerations. This is because the probability of secondary accidents is a dynamic process, with the risk of facility damage increasing over time. Time series analysis and probabilistic models can be used to describe the progression of accidents. For example, a Markov chain model can be used to simulate the evolution of accidents over time and predict the probability of failure in the next stage.

[0112] S304. Based on the explosion overpressure field, determine the accident range corresponding to the chemical accident, and divide the accident range into multiple accident points.

[0113] S305. Determine explosion overpressure values ​​at multiple accident points.

[0114] S306. Determine the ideal probability of death of personnel corresponding to the multiple accident points based on the explosion overpressure values ​​of the multiple accident points.

[0115] The accident point is used to indicate any point within the accident range. Different explosion overpressure values ​​can cause varying degrees of injury and damage to personnel and facilities. For example, when the explosion overpressure reaches 30kPa, buildings may suffer severe damage and personnel may be seriously injured. When the overpressure reaches 50kPa, most buildings will collapse, and the probability of survival is extremely low. The accident range is determined by calculating the overpressure value at each location (i.e., any location) within the explosion overpressure field, using the overpressure value that causes severe injury to personnel or serious damage to facilities as the boundary.

[0116] It is understandable that the classification of accident points is based on different overpressure values. For example, the accident area can be divided into multiple zones according to the intensity of the blast wave, and each zone corresponds to a different overpressure value and accident point. Based on the explosion overpressure value of each point in the study area caused by the secondary explosion of each energetic facility, the following formula can be used to calculate the probability of death of personnel at each location caused by each secondary explosion:

[0117] ;in, is the intermediate probability, , .

[0118] Optionally, the selection of accident points can be done by, for example, dividing the accident range into regular grids, such as using 5m×5m or 10m×10m as a grid unit, with the center of each grid as an accident point. Alternatively, based on the actual situation at the accident scene, some key locations can be designated as accident points, such as important equipment around the accident source, areas where personnel are concentrated, and firefighting facilities. Around these key locations, the distribution of accident points can be appropriately increased to more accurately assess the impact of the accident. The specific division of accident points can be adjusted according to the rescue needs of different accidents, and this application will not elaborate on this.

[0119] S307: Based on the secondary accident probability and multiple ideal death probabilities, obtain the death probabilities corresponding to multiple accident points.

[0120] S308. Obtain a first probability distribution field of death within the accident range based on the death probabilities corresponding to the multiple accident points.

[0121] Since the corresponding explosion overpressure field, which can lead to fatalities, is generated only after a secondary accident occurs, the fatality probability needs to be adjusted based on the secondary accident probability to obtain a more accurate fatality probability. By calculating the domino effect probability of each energetic device being damaged by the initial accident at different times, and the fatality probability field generated by each energetic device once an explosion occurs, we can calculate the fatality probability distribution field for potential secondary explosions under the influence of the initial accident.

[0122] As can be understood, the accident range can be divided into a grid, with each grid cell representing a small geographic area (i.e., the accident site area). The grid resolution can be determined based on the scope and accuracy requirements of the accident impact. For each accident site, the calculated adjusted probability of fatality is distributed to adjacent grid cells based on its location and impact range. Specifically, spatial interpolation methods (such as inverse distance weighted interpolation and kriging interpolation) can be used to more smoothly distribute probability values. The choice of interpolation method can be determined based on the characteristics of the accident impact and the accuracy requirements, and this solution does not limit this. If a grid cell is affected by multiple accident sites, the maximum probability of fatality generated by these accident sites within the cell can be selected as the probability value for that cell (following the "worst-case principle" that as long as there is a single accident site that could result in fatality, the people within the cell may face a fatality risk). The fatality probabilities of all grid cells are combined to form a complete probability distribution field.

[0123] Optionally, the software's visualization capabilities can be used to display the fatality probability data in the form of a thematic map to illustrate the risk distribution within the accident area. For example, a color gradient can be used to represent the high and low fatality probabilities in different areas, forming a primary fatality probability distribution field. Red areas can represent high-fatality probability areas, while blue areas represent low-fatality probability areas, intuitively presenting the spatial distribution of fatality probability within the accident area. Contour maps can also be used for display; the denser the contour lines, the greater the change in fatality probability.

[0124] S309. Determine the emergency rescue point for the chemical accident, and determine multiple rescue routes based on the first person death probability distribution field.

[0125] Emergency rescue points indicate the points where emergency rescue personnel must perform rescue operations during chemical accident rescue operations. By combining the actual locations of emergency rescue points with a contour map of fatality probability, potential routes are mapped and analyzed to determine the distance required to travel from the rescue location to the acceptable fatality probability boundary.

[0126] S310: Determine the first path priority of each rescue path, and use the rescue path with the highest first path priority as the departure path.

[0127] S311. When the departure path is determined, determine the second path priority of other rescue paths, and use the rescue path with the highest second priority as the approach path.

[0128] The selection of emergency rescue points can be based on the specific circumstances of the accident site, including but not limited to factors such as the type of accident, the scope and severity of the hazard, topography, and wind direction. For example, emergency rescue points can be selected based on the following conditions: being located upwind or crosswind of the accident site to protect rescue workers from toxic and hazardous gases; being convenient for the entry, exit, and parking of rescue vehicles to ensure the rapid deployment of rescue supplies and equipment; and having stable communication equipment to ensure smooth communication with the command center and other rescue points.

[0129] Based on the actual emergency rescue point locations and the fatality probability contour map constructed in the previous steps, identify multiple rescue routes to the rescue points. These routes should include both primary and backup routes to ensure that alternative routes are available if the primary route is blocked.

[0130] As you can understand, the first-path priority for each rescue route is determined based on factors such as capacity, safety, and distance from the accident scene. Routes with greater capacity, higher safety, and closer proximity to the accident scene are given higher priority. Using the highest-priority rescue route as the exit route ensures that rescuers can quickly evacuate the accident scene when necessary. This is because after the rescue operation is completed, ensuring that rescuers can evacuate the accident scene as quickly and safely as possible is crucial, and the highest-priority route generally offers advantages in terms of safety and efficiency.

[0131] Optionally, after determining the exit route, re-evaluate the secondary path priority of the remaining rescue routes. In addition to the risk and efficiency factors mentioned above, this assessment also considers complementarity and connectivity with the exit route. Priority should be given to routes that complement the exit route in terms of direction, transit areas, and other aspects. For example, if the exit route primarily follows roads on the east side of the factory, routes to the west and at a distance from the exit route may have a higher secondary path priority. This provides access to rescue routes in different directions, increasing rescue flexibility. Evaluate the routes' connectivity with emergency rescue points, the location of rescue resources, and possible evacuation directions. Routes with smooth connections to emergency rescue points, easy access to rescue resources, and consistent evacuation directions will receive a higher secondary path priority. For example, a route that directly connects an emergency rescue point to a primary evacuation route and has access to fire water sources and emergency supply storage points along the way will have a higher priority in this regard.

[0132] Specifically, each path's influencing factors can be weighted and then weighted based on the evaluation results to obtain a comprehensive score for each rescue path. The higher the score, the higher the path's priority. For example, in terms of departure path priority, the influencing factors mainly include probability of death, rescue time, and level of danger. Assuming a weight of 0.5 for probability of death, 0.3 for rescue time, and 0.2 for level of danger, path X scores 80 out of 100 for probability of death, 70 for rescue time, and 75 for level of danger. Therefore, the comprehensive score of path X can be calculated based on the weights to be 76. By comprehensively scoring all rescue paths, their path priority order is determined.

[0133] The method for determining the emergency rescue path for chemical accidents provided in the embodiment of the present application predicts the impact of thermal radiation on secondary accidents around chemical facilities through the calculation of the domino effect model and the explosion overpressure field, and determines the scope of the chemical accident and divides the accident points. Based on the overpressure values ​​and secondary accident probabilities of different accident points, the probability of death of personnel corresponding to each accident point is obtained, and then the probability distribution field of death of personnel within the entire accident range is determined. The probability field of death of personnel can provide important data support and decision-making basis for rescue path planning. The priority is determined based on the probability of death, path length and risk assessment, and the departure path and approach path are set according to the actual situation, which can ensure that the emergency response can be carried out efficiently and safely, while having the ability to flexibly respond to changes on site.

[0134] Figure 4 Schematic diagram of the process of determining the chemical accident emergency rescue path provided in this application Figure 3 This embodiment is based on Figure 2 and Figure 3 Based on the embodiment, the process of processing the first death probability distribution field is described in detail, such as Figure 4 As shown, the method for determining a chemical accident emergency rescue path provided by the embodiment of the present application includes:

[0135] S401. For any one of the multiple other chemical facilities, treat the chemical facility as a secondary accident facility.

[0136] S402. Determine a second probability distribution field of death of personnel corresponding to the secondary accident facility.

[0137] The secondary fatality probability distribution field indicates the probability distribution of fatalities resulting from a secondary accident caused by a chemical accident at a secondary accident facility. This is determined by determining the specific type of chemical facility, such as a storage tank, reactor, pipeline, or other specialized equipment, as well as the type, quantity, and physical and chemical properties of the chemicals stored or being processed within the facility. These properties include boiling point, flash point, explosion limits, and toxicity. Combined with the determined initial thermal radiation damage field, the facility's response to thermal radiation is analyzed, and the probability of a secondary accident is determined based on the domino effect.

[0138] It is understandable that based on the facility information of the secondary accident facility, the type of secondary accident can be estimated. Based on the accident type and facility information, the explosion overpressure field that would occur if the secondary accident facility were to experience thermal radiation from the initial accident, can be determined. Similarly, a secondary accident will result in a new thermal radiation injury field or explosion overpressure field, leading to a secondary accident (i.e., a Level 3 accident relative to the initial accident). The probability of occurrence of this secondary accident can be determined based on domino effect calculations. Based on the type of secondary accident, the corresponding accident consequence model can be used to determine the explosion overpressure field of the secondary accident, and then the probability distribution field of the secondary accident's fatality, i.e., the second probability distribution field of fatality corresponding to the secondary accident facility, can be determined.

[0139] Specifically, the second probability distribution field of death can be calculated based on the calculation process of the first probability distribution field of death mentioned in the chemical accident emergency rescue path determination method described in the above embodiment. The difference is that the secondary accident probability corresponding to the secondary accident facility needs to be superimposed on the second probability distribution field of death.

[0140] S403: Superimpose the first death probability distribution field and the second death probability distribution field to obtain a processed first death probability distribution field.

[0141] The simultaneous presence and interaction of multiple secondary accident factors can be considered, and appropriate methods can be used to comprehensively calculate the probability of death. Methods such as probability superposition and joint probability can be used to combine the probability of death caused by different factors. For example, in a scenario where a fire and explosion occur simultaneously, the probability of death caused by fire thermal radiation and explosion overpressure can be calculated separately, and then the combined probability of death can be calculated using the joint probability method.

[0142] It is understandable that the two distribution fields can be superimposed by unifying the coordinate system to ensure that the two probability distribution fields are based on the same coordinate system. This means that the same origin, coordinate axis direction, and units are used when dividing the grid or defining the spatial position. For example, if the first probability distribution field of death is based on a coordinate system with the center of the chemical accident as the origin, the east direction as the positive direction of the x-axis, the north direction as the positive direction of the y-axis, and the unit as meters, then the second probability distribution field of death must also use the same settings.

[0143] By weighting and superimposing the death probability distributions of the first and second individuals, a more accurate death probability distribution can be obtained. This approach comprehensively considers the different risks of the two types of individuals, ultimately providing a more accurate risk assessment map for emergency decision-making, evacuation, and post-disaster assessment.

[0144] In one possible implementation, if the intensity of a domino-effect accident (explosion) is high enough, the shock wave and fragmentation damage can further trigger a domino effect at the next level. Based on the actual accident requirements, multiple rounds of prediction can be repeated, with the first step being an explosion scenario. The death probability distribution field generated in the nth step is superimposed on the death probability distribution field from the previous cycle. Points with equal probability values ​​are connected to form probability contour lines.

[0145] Specifically, points with the same probability value are connected to form a contour map, which can clearly show the levels of mortality risk in different areas. For example, a contour line formed by points with a mortality probability of 0.5 indicates a relatively high mortality risk in that area, while a contour line with a mortality probability of 0.1 indicates an area with lower risk. If multiple rounds of simulation are performed, the contour lines of each round can be displayed separately, or the contour lines of each round can be combined to form a global mortality probability contour map, which can be used to illustrate the scope of the accident impact and the gradually expanding risk areas. The generated contour map can provide decision makers with a more intuitive understanding of the scope and severity of the accident impact.

[0146] The method for determining emergency rescue paths for chemical accidents, provided in the embodiments of this application, uses a progressively superimposed domino effect accident simulation method to accurately predict the spread and secondary impact of an accident. By superimposing a probability distribution field for death, a more detailed risk assessment can be provided. By generating contour lines with equal probability values, this can assist in planning emergency responses and resource allocation, ensuring that the harm caused by an accident is minimized.

[0147] Figure 5 The schematic diagram of the structure of the chemical accident emergency rescue path determination device provided in this application is as follows: Figure 5 As shown, the chemical accident emergency rescue path determination device 500 provided in this embodiment includes:

[0148] The determination module 501 is used to determine the initial accident facility and the initial thermal radiation damage field of the chemical accident after the chemical accident occurs, where the initial accident facility indicates the first chemical facility where the chemical accident first occurs;

[0149] The determination module 501 is further configured to determine the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility based on the initial thermal radiation damage field;

[0150] The determination module 501 is further configured to determine a first death probability distribution field within the accident range corresponding to the chemical accident based on the secondary accident probability and the explosion overpressure field, where the first death probability field is configured to indicate a probability distribution field of death resulting from a secondary accident caused by the chemical accident.

[0151] The determination module 501 is further configured to determine an emergency rescue path for the chemical accident based on the first personnel death probability distribution field.

[0152] In a possible implementation, the apparatus further includes: a calculation module 502;

[0153] The determination module 501 is further used to determine the initial accident facility of the chemical accident and the corresponding chemical accident type, where the chemical accident types include but are not limited to: pool fire and jet fire;

[0154] The determination module 501 is further configured to determine a corresponding accident consequence model based on the type of chemical accident;

[0155] The calculation module 502 is used to calculate the initial thermal radiation damage field using the accident consequence model.

[0156] In a possible implementation, the determination module 501 is further configured to determine an accident range corresponding to the chemical accident based on the explosion overpressure field, and divide the accident range into a plurality of accident points, where an accident point is used to indicate any point within the accident range;

[0157] The determination module 501 is further configured to determine explosion overpressure values ​​at multiple accident points and corresponding probability of death, wherein the probability of death indicates the probability of death resulting from a secondary accident caused by the chemical accident.

[0158] The determination module 501 is further configured to obtain a first probability distribution field of death within the accident range based on the death probabilities corresponding to the multiple accident points.

[0159] In a possible implementation, the determination module 501 is further configured to determine the ideal probability of death of personnel corresponding to the multiple accident points based on the explosion overpressure values ​​of the multiple accident points;

[0160] The determination module 501 is further configured to obtain the probability of death of personnel corresponding to multiple accident points based on the secondary accident probability and multiple ideal probability of death of personnel.

[0161] In a possible implementation, the determination module 501 is further configured to determine any one of the multiple other chemical facilities as a secondary accident facility;

[0162] The determination module 501 is further configured to determine a second probability distribution field of death corresponding to the secondary accident facility, where the second probability distribution field of death is used to indicate a probability distribution field of death caused by a secondary accident resulting from a chemical accident occurring at the secondary accident facility.

[0163] The determination module 501 is further configured to perform superposition processing on the first death probability distribution field and the second death probability distribution field to obtain a processed first death probability distribution field.

[0164] In one possible embodiment, the emergency rescue path includes an approach path and an exit path. The determination module 501 is further configured to determine an emergency rescue point for the chemical accident and determine multiple rescue paths based on the first probability distribution field of death of personnel. The emergency rescue point is used to indicate a task point for emergency rescue personnel to perform rescue operations during the chemical accident rescue process.

[0165] The determination module 501 is further configured to determine the first path priority of each rescue path, and use the rescue path with the highest first path priority as the departure path, wherein the first path priority is determined based on the length of the rescue path and the degree of hazard of the path.

[0166] In one possible embodiment, the determination module 501 is further used to determine the second path priority of other rescue paths when the departure path is determined, and to use the rescue path with the highest second priority as the approach path, wherein the second path priority is determined based on the departure direction, path length, and path hazard level corresponding to the departure path.

[0167] The chemical accident emergency rescue path determination device provided in this embodiment can execute the chemical accident emergency rescue path determination method provided in the above method embodiment. Its implementation principle and technical effects are similar, and will not be described in detail in this embodiment.

[0168] Figure 6 This is a schematic diagram of the structure of the chemical accident emergency rescue path determination device provided in this application. Figure 6 As shown, the chemical accident emergency rescue path determination device 600 provided in this embodiment includes: at least one processor 601 and a memory 602. Optionally, the device 600 also includes a communication component 603. The processor 601, the memory 602, and the communication component 603 are connected via a bus 604.

[0169] During the specific implementation process, at least one processor 601 executes the computer-executable instructions stored in the memory 602, so that the at least one processor 601 performs the above method.

[0170] The specific implementation process of the processor 601 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0171] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASICs), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly executed by a hardware processor or by a combination of hardware and software modules within the processor.

[0172] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage.

[0173] A bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be categorized as address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0174] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0175] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0176] The readable storage medium may be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0177] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0178] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.

[0179] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0180] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0181] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0182] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0183] Finally, it should be noted that other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structure described above and shown in the drawings. Various modifications and variations may be made without departing from the scope of the present invention.

Claims

1. A method for determining a chemical accident emergency rescue path, characterized in that: The method comprises: After a chemical accident occurs, determining an initial accident facility of the chemical accident and a corresponding chemical accident type, wherein the chemical accident type is a pool fire or a jet fire, and the initial accident facility is used to indicate a first chemical facility where the chemical accident first occurs; An accident consequence model corresponding to the chemical accident type is determined, and the initial thermal radiation damage field is calculated using the accident consequence model. If the chemical accident type is determined to be a pool fire, the thermal radiation damage field is calculated using the pool fire calculation model, and the heat flux formula received by the target is: ,in, represents the heat flux received by the target, is the horizontal distance from the target to the leakage center, is the viewing angle factor; if the chemical accident type is determined to be a vertical jet fire, the thermal radiation damage field is calculated using the vertical jet fire calculation model, and the target receiving thermal radiation flux formula is: ,in, Indicates distance The thermal radiation flux received by the initial target, is the atmospheric transmission rate, is the thermal radiation coefficient, is the mass flow rate of the fuel, Indicates the heat of combustion, is the viewing angle factor; Determining, based on the initial thermal radiation damage field, the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility; Based on the explosion overpressure field, determining an accident range corresponding to the chemical accident, and dividing the accident range into a plurality of accident points, wherein the accident points are used to indicate any point within the accident range; Determining explosion overpressure values ​​and corresponding human mortality probabilities at a plurality of the accident points, wherein the human mortality probability indicates the probability of human mortality resulting from a secondary accident caused by the chemical accident; Determining a first death probability distribution field within the accident range corresponding to the chemical accident based on the death probabilities corresponding to the plurality of accident points, wherein the first death probability field is used to indicate a probability distribution field of death resulting from secondary accidents caused by the chemical accident; The first and second death probability distribution fields are superimposed to obtain a processed first death probability distribution field; the second death probability distribution field is used to indicate a probability distribution field of death resulting from a secondary accident caused by a chemical accident occurring at a secondary accident facility, where the secondary accident facility is any one of a plurality of other chemical facilities. determining an emergency rescue path for the chemical accident based on the processed first probability distribution field of death, the emergency rescue path comprising an approach path and an exit path; the exit path being a rescue path with the highest priority among first paths, the first path priority being determined based on the length and hazard level of the rescue path, the rescue path being a path determined based on the processed first probability distribution field of death; It also includes: when the departure path is determined, determining the second path priority of other rescue paths, and using the rescue path with the highest second priority as the approach path, wherein the second path priority is determined based on the departure direction, path length and path hazard level corresponding to the departure path.

2. The method according to claim 1, characterized in that Determining the probability of death of personnel corresponding to the plurality of accident points includes: determining, based on the explosion overpressure values ​​of the plurality of accident points, the ideal probability of death of personnel corresponding to the plurality of accident points; Based on the secondary accident probability and the plurality of ideal death probabilities, the death probabilities corresponding to the plurality of accident points are obtained.

3. The method according to claim 1, characterized in that The method further comprises: For any one of the multiple other chemical facilities, the chemical facility is regarded as a secondary accident facility; Determine a second probability distribution field of personnel death corresponding to the secondary accident facility.

4. The method according to claim 1, wherein Also includes: Determine the emergency rescue point for a chemical accident, which is used to indicate the task point where emergency rescue personnel will perform rescue operations during the chemical accident rescue process; Determine the first path priority for each rescue path.

5. A chemical accident emergency rescue path determination device, characterized in that: The device comprises: The determination module is used to determine the initial accident facility of the chemical accident and the corresponding chemical accident type after the chemical accident occurs, where the chemical accident type is pool fire or jet fire. The initial accident facility is used to indicate the first chemical facility where the chemical accident first occurs; determine the corresponding accident consequence model based on the chemical accident type, and use the accident consequence model to calculate the initial thermal radiation damage field; wherein, if the chemical accident type is determined to be a pool fire, the thermal radiation damage field is calculated using the pool fire calculation model, and the heat flux formula received by the target is: ,in, represents the heat flux received by the target, is the horizontal distance from the target to the leakage center, is the viewing angle factor; if the chemical accident type is determined to be a vertical jet fire, the thermal radiation damage field is calculated using the vertical jet fire calculation model, and the target receiving thermal radiation flux formula is: ,in, Indicates distance The thermal radiation flux received by the initial target, is the atmospheric transmission rate, is the thermal radiation coefficient, is the mass flow rate of the fuel, Indicates the heat of combustion, is the viewing angle factor; The determination module is further configured to determine, based on the initial thermal radiation damage field, the secondary accident probabilities and explosion overpressure fields of multiple other chemical facilities surrounding the initial accident facility; The determination module is further configured to determine, based on the explosion overpressure field, an accident range corresponding to the chemical accident, and divide the accident range into a plurality of accident points, wherein the accident points are used to indicate any point within the accident range; determine explosion overpressure values ​​and corresponding death probabilities of the plurality of accident points, wherein the death probabilities are used to indicate the probability of death resulting from a secondary accident caused by the chemical accident; and determine, based on the death probabilities corresponding to the plurality of accident points, a first death probability distribution field within the accident range corresponding to the chemical accident, wherein the first death probability field is used to indicate the probability distribution field of death resulting from a secondary accident caused by the chemical accident; The determination module is further configured to superimpose the first death probability distribution field and the second death probability distribution field to obtain a processed first death probability distribution field; the second death probability distribution field is configured to indicate a probability distribution field of death caused by a secondary accident resulting from a chemical accident occurring at a secondary accident facility, where the secondary accident facility is any one of a plurality of other chemical facilities. The determination module is further used to determine the emergency rescue path of the chemical accident based on the processed first personnel death probability distribution field, the emergency rescue path including: an approach path and an exit path; the exit path is the rescue path with the highest priority among the first paths, the first path priority is determined based on the length of the rescue path and the degree of hazard of the path, and the rescue path is a path determined according to the processed first personnel death probability distribution field.

6. A chemical accident emergency rescue path determination device, characterized in that: include: Memory, processor; The memory is used to store computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 4 when executed by a processor.

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