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

Abstract

The invention provides a chemical accident emergency rescue path determination method and device, equipment and a medium, and relates to the field of emergency rescue. The method comprises the following steps: after a chemical accident occurs, determining an initial accident facility and an initial thermal radiation damage field of the chemical accident; according to the initial thermal radiation damage field, determining secondary accident probabilities and explosion overpressure fields of a plurality of other chemical facilities around the initial accident facility; based on the secondary accident probability and the explosion overpressure field, determining a first personnel death probability distribution field in an accident range corresponding to the chemical accident; and determining an emergency rescue path of the chemical accident based on the first personnel death probability distribution field. By calculating the initial accident development condition and analyzing the personnel death probability field formed by the secondary accident in the whole accident area, the optimal rescue path is determined, and the problem that the approach and departure paths of emergency vehicles and personnel are lack of a clear theoretical basis and a specific analysis method during accident rescue at present is 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. Inadequate consideration of secondary accident risks 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 are 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 move, 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, and lack 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 the emergency rescue path of a chemical accident, so as to solve the technical problem that the prior art 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 injury field of the chemical accident, wherein the initial accident facility is used to indicate a first chemical facility where a chemical accident first occurs;

[0008] Determining 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;

[0009] Based on the secondary accident probability and the explosion overpressure field, determining a first probability distribution field of death of personnel within the accident range corresponding to the chemical accident, wherein the first probability distribution field of death of personnel is used to indicate the probability distribution field of death of personnel 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 a 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, the chemical accident type is not limited to: pool fire, jet fire;

[0013] The 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 manner, determining the probability distribution field of the first person 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 the 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] Determine explosion overpressure values ​​and corresponding death probabilities of multiple accident points, wherein the death probability of personnel is used to indicate the probability of death of personnel caused by secondary accidents 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 manner, determining the probability of death of personnel corresponding to the plurality of accident points includes:

[0019] Determining the ideal probability of death of personnel corresponding to the multiple accident points according to the explosion overpressure values ​​of the multiple accident points;

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

[0021] In a 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] Determine a second probability distribution field of death of personnel corresponding to the secondary accident facility, wherein the second probability distribution field of death of personnel is used to indicate a probability distribution field of death of personnel caused by a secondary accident caused by a chemical accident occurring in the secondary accident facility;

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

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

[0026] Determine an emergency rescue point for a chemical accident, and determine a plurality of rescue paths according to the first probability distribution field of death of personnel, wherein the emergency rescue point is used to indicate a task point for emergency rescue personnel to perform rescue during the rescue process of the chemical accident;

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

[0028] In a 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, used to determine the initial accident facility and the initial thermal radiation injury 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 used to determine the secondary accident probability and explosion overpressure field of multiple other chemical facilities around the initial accident facility based on the initial thermal radiation damage field;

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

[0034] The determination module is further used to determine the emergency rescue path of 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 used to determine the initial accident facility of the chemical accident and the corresponding chemical accident type, and the chemical accident type is not limited to: pool fire, jet fire;

[0037] The determination module is further used 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 used to determine the 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 used to determine explosion overpressure values ​​of the plurality of accident points and corresponding probability of death of personnel, wherein the probability of death of personnel is used to indicate the probability of death of personnel caused by a secondary accident caused by the chemical accident;

[0041] The determination module is further used to obtain a first probability distribution field of death of personnel within the accident range according to the probability of death of personnel corresponding to the multiple accident points.

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

[0043] The determination module is further used 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 manner, the determination module is further used to determine any one of a plurality of other chemical facilities as a secondary accident facility;

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

[0046] The determination module is further used 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 an exit path, the determination module is further used to determine the emergency rescue point of the chemical accident, and determine multiple rescue paths according to the first personnel death probability distribution field, the emergency rescue point is used to indicate the task point for emergency rescue personnel to perform rescue during the chemical accident rescue process;

[0048] The determination module is further used 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.

[0049] In a possible implementation, the determination module 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 corresponding to the departure path, the path length, and the degree of hazard of the path.

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

[0051] The memory is used to store computer-executable instructions;

[0052] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above 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, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above 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, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0055] The method for determining the emergency rescue path of a chemical accident provided by the present application, after the occurrence of a chemical accident, by determining the initial accident facility and the initial thermal radiation injury field of the chemical accident, the initial accident facility is used to indicate the first chemical facility where the chemical accident first occurs; according to the initial thermal radiation injury 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 death probability distribution field of personnel within the accident range corresponding to the chemical accident is determined, and the first death probability field of personnel 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 death probability distribution field of personnel, the emergency rescue path of the chemical accident is determined. 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 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 a scenario for a method for determining a 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 a device for determining a chemical accident emergency rescue path provided in this application;

[0062] Figure 6 A schematic diagram of the structure of the chemical accident emergency rescue path determination device provided in this application.

[0063] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, examples of which are 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 attached 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 the present application.

[0065] The terms "first", "second", "third", "fourth", etc. (if any) in the description of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein, for example.

[0066] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0067] First, the terms involved in this application are explained:

[0068] Thermal radiation: refers to the phenomenon that an object radiates electromagnetic waves due to its temperature. All objects with a temperature above absolute zero can produce thermal radiation. The higher the temperature, the greater the total energy radiated and the more short-wave components. Thermal radiation is one of the three ways of heat transfer, the other two being heat conduction and heat convection.

[0069] Overpressure field of secondary accident: refers to the formation of an overpressure area after the first accident, due to the pressure change and gas release at the accident site, the surrounding pressure rises sharply. This overpressure field poses a serious threat to the surrounding environment and personnel safety.

[0070] Boiling Liquid Expanding Vapor Cloud Explosion (BLEVE) is an explosion that occurs when the temperature of liquid and vapor in a pressure vessel is higher than its normal boiling point. When the liquid in the pressure vessel is superheated, the temperature is much higher than its normal boiling point, and the container wall is cracked or damaged, the superheated liquid will quickly vaporize and form a vapor cloud, resulting in 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. Inadequate consideration of secondary accident risks 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, and lack 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 method for determining the emergency rescue path for chemical accidents provided in this application calculates the thermal radiation damage field of the initial accident, determines the probability of secondary accident effects of the chemical facilities of the initial accident and the surrounding chemical energy facilities based on the accident effect, and calculates the overpressure field caused by the secondary accident; combines the probability of death of personnel in each location within the accident range under the secondary accident with the probability equation of death of personnel, and draws a probability cloud map of death of personnel; combines the location of the rescue point with the probability cloud map of death of personnel, and determines the optimal rescue path. The method of quantitative calculation directly provides a method for selecting the entry and exit paths of emergency vehicles and personnel, which is more theoretically based and more reliable than the empirical judgment method.

[0074] Figure 1 A schematic diagram of a scenario for determining a method for emergency rescue paths for chemical accidents provided in this application. Wherein, the dotted part represents a probability cloud map of the risk of casualties caused by the injury field caused by the initial accident and the secondary accident. After a chemical accident occurs in the initial accident facility, by calculating the thermal radiation injury field of the initial accident, the probability of secondary accidents in other surrounding chemical facilities can be determined based on the domino effect, and the overpressure field caused by the secondary accident can be calculated. Based on the above calculation, the probability of death of personnel at each position point in the figure can be obtained, and a cloud map of the probability of death of personnel can be drawn, that is, the dotted area circled in the figure. According to the emergency rescue points corresponding to the predetermined initial accident combined with the cloud map of the probability of death of personnel, multiple rescue paths can be obtained. By continuing to analyze multiple paths in combination with the cloud map, the best two paths are determined as the rescue (entry / exit) paths for the chemical accident, which solves the current problem of lack of clear theoretical basis and specific analysis methods for the entry and exit paths of emergency vehicles and personnel during accident rescue.

[0075] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. 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 of the chemical accident.

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

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

[0080] Specifically, after a chemical accident occurs, the corresponding classic accident consequence model can be determined according to 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] Among them, the thermal radiation of the initial accident may cause secondary accidents of different types of energy-containing facilities. Based on the type, scale and accident status (such as combustion, explosion, etc.) of the initial accident facility, the thermal radiation propagation model is used to calculate the scope and intensity of its thermal radiation damage field, and determine the materials, structures, safety protection devices and other information of the surrounding chemical facilities to evaluate their tolerance to thermal radiation, such as the fire protection level of the facility, the effectiveness of thermal radiation shielding facilities, etc. The probability of secondary accidents is calculated using probability statistics methods in combination with the thermal radiation damage field of the initial accident facility and the tolerance of the surrounding chemical facilities.

[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 atmospheric pressure storage tank. When the pressure vessel is exposed to the elements, it may cause the tank to deform or the safety valve to trip; the heat radiation in the pressure vessel causes the internal pressure to rise suddenly, and an explosion occurs when it exceeds the design pressure. In the parameter evaluation process, the domino effect model can be used to calculate the probability of secondary accidents in multiple other chemical facilities around the initial accident facility.

[0084] Different energetic facilities will form different forms of secondary accidents under the action of thermal radiation. For example, atmospheric pressure containers often experience overpressure explosions under the action of thermal radiation, followed by liquid pool fires; pressure vessels will experience overpressure explosions or BLEVEs, and may further cause pool fires. The types of different energetic facilities can be used to determine the types of secondary accidents that occur at different energetic facilities, such as fireball explosions, steam cloud explosions, or BLEVEs. Different overpressure field calculation models correspond to different accident types, and the explosion overpressure fields of multiple other chemical facilities can be obtained through the corresponding calculation models.

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

[0086] Among them, the first death probability field is used to indicate the probability distribution field of death caused by secondary accidents under the action of chemical accidents. According to the explosion overpressure field, the explosion overpressure values ​​corresponding to multiple points within the accident range can be obtained. According to relevant standards and research, different overpressure values ​​cause different degrees of harm to personnel. Generally speaking, when the overpressure is 0.05MPa, it may cause minor injuries to personnel; when it is 0.1MPa, personnel will suffer moderate injuries, such as ruptured eardrums, internal organ damage, etc.; when it exceeds 0.21MPa, personnel are likely to die. Based on specific experimental data and research results, a quantitative relationship between overpressure value and probability of death can be established.

[0087] It is understandable that the accident range can be divided into several small calculation units, each of which can be a square or rectangular area of ​​a fixed size, or even a point, to facilitate numerical calculation and analysis. For the impact of explosion overpressure, the relationship function between overpressure and death probability is constructed based on the explosion overpressure value in the unit, and the probability of death caused by overpressure can be calculated. Since the occurrence of overpressure explosion is based on the occurrence of secondary accidents, the probability of death needs to be corrected by the probability of secondary accidents in the prediction process, so as to obtain the probability of death caused by overpressure under the occurrence of secondary accidents.

[0088] Based on the probability of death of multiple points, the calculation results of the probability of death of each calculation unit can be spatially interpolated and visualized to draw a probability distribution field map of death, so as to intuitively show the distribution of probability of death of 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 of personnel at each point.

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

[0091] Among them, we can combine the actual emergency rescue point location and the contour map of the probability of death of personnel to draw various potential paths, analyze each path, and clarify the distance required from the rescue location point to the acceptable death probability boundary. The shorter the distance, the higher the selection priority.

[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, according to 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 probability of death, the direction and gradient of the increase or decrease in the probability of death are determined, and the rules for path selection can be determined, such as the rescue path should avoid possible dangerous areas, and choose the shortest and most unobstructed path as much as possible to reduce rescue time. However, in chemical accidents, the shortest path is not necessarily the best path, and factors such as road conditions, obstacles, fire spread, and convenience of rescue and evacuation 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 rescue path can be preliminarily 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 high death probability area. For multiple rescue points in the high death probability area, rescue is carried out in order from high to low death probability or from low to high rescue difficulty. In addition, obstacles that may exist on the path, such as collapsed buildings, damaged equipment, flowing hazardous chemicals, etc., can be analyzed in detail, wherein, for obstacles that cannot be avoided, corresponding removal or crossing plans are 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 is not repeated in this application.

[0094] The method for determining the emergency rescue path of a chemical accident provided by the embodiment of the present application, after the occurrence of a chemical accident, by determining the initial accident facility and the initial thermal radiation injury field of the chemical accident, the initial accident facility is used to indicate the first chemical facility where the chemical accident first occurs; according to the initial thermal radiation injury 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 death probability distribution field of personnel within the accident range corresponding to the chemical accident is determined, and the first death probability field of personnel 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 death probability distribution field of personnel, the emergency rescue path of the chemical accident is determined. By calculating the initial accident development situation, analyzing the probability field of personnel death formed by the secondary accident in the entire accident area, and determining the optimal rescue path, the problem of the lack of 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 in 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 of the chemical accident and the corresponding chemical accident type.

[0097] The types of chemical accidents include but are not limited to pool fires and jet fires. The initial accident facility is used to indicate the first chemical facility where a chemical accident first occurs. 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 the on-site analysis. For example, by observing the flame shape and combustion characteristics, if the scene presents a large area of ​​relatively stable flames, the flame height is relatively low and basically in the same plane, the burning area is similar to a "pool", there is no obvious spray or jet phenomenon, there are traces of liquid flowing around, there are residues after burning on the ground, etc., it is likely to be 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 jet 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 an initial thermal radiation damage field.

[0100] Among them, for fire accidents, such as liquid pool fires (pool fires) formed after the leakage of flammable liquids or fusible combustible solids, and jet fires formed after the leakage of pressurized gas or pressurized liquids, the corresponding accident consequence models can be used for calculation. For pool fire or jet fire accidents, the fire thermal radiation model can be used to calculate the initial thermal radiation damage field. This usually requires consideration of factors such as the radiation intensity of the flame, the distance between the flame and the irradiated object, and the thermal radiation absorption rate of the irradiated object. Through calculation, the thermal radiation intensity of the irradiated object at different distances can be obtained, and then the degree of damage to personnel and equipment caused by thermal radiation can be evaluated.

[0101] It can be understood that if the type of chemical accident 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, To give an example of the level of target to 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 be calculated through the corresponding accident consequence model to obtain the corresponding thermal radiation damage field, which will not be described in detail 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] Among them, under the action of thermal radiation, the existing domino effect model can be used to calculate the probability of secondary accident risks of different types of energetic facilities under the action of thermal radiation. The domino effect model describes the chain reaction after an accident. Through this model, it can be predicted how an accident in a chemical facility will trigger secondary accidents in other facilities, and then expand to a wider range of impacts.

[0105] It is understandable that the impact of thermal radiation on surrounding facilities can be estimated by calculating the thermal radiation intensity and combining the heat resistance of the equipment (such as equipment material, thermal insulation measures, etc.). The probability of the domino effect can be evaluated by 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 when the accident occurred, is the container volume.

[0109] Optionally, based on the calculation results of the probability of secondary accidents, as well as factors such as the type of surrounding chemical facilities, the nature of the stored materials, and the impact of thermal radiation, it is determined whether a secondary explosion may occur, so as to identify chemical facilities where secondary accidents may occur. For example, under the action of thermal radiation, if the pressure of a storage tank containing flammable and explosive gases continues to rise and exceeds the bearing limit of the tank, an explosion may occur. By analyzing the energy and explosion forms (such as steam cloud explosion, fireball explosion, etc.) that may be released by other chemical facilities when secondary explosion accidents occur, and using explosion overpressure calculation models (such as TNT equivalent method, multiphase flow model, etc.) to calculate the explosion overpressure field generated by the explosion source, the intensity distribution of the explosion overpressure field is determined, including the overpressure values ​​at different distances.

[0110] Specifically, for example, if it is judged that a secondary explosion may occur, a suitable explosion overpressure calculation model may be selected, such as the TNT equivalent method, the Baker-Strehlow model, etc. The TNT equivalent method is to equate the explosive material to a certain amount of TNT explosives, and calculate the overpressure generated by the explosion of chemical facilities according to the overpressure calculation formula of the TNT explosive explosion. 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, temperature, etc. These parameters are substituted into the selected explosion overpressure calculation model, and the explosion overpressure values ​​are calculated at different distances and directions with the facility where the secondary explosion may occur as the center, so as to determine the distribution of the explosion overpressure field.

[0111] In one possible implementation, based on the domino effect model, time considerations can be added. This is because the probability of secondary accidents is a dynamic process, and the risk of damage to facilities increases over time. The progression of accidents can be described by time series analysis and probability models. 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 ​​of multiple accident points.

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

[0115] Among them, the accident point is used to indicate any point within the accident range. Different explosion overpressure values ​​will cause different degrees of injury and damage to personnel and facilities. For example, when the explosion overpressure reaches 30kPa, buildings may be severely damaged and personnel may be seriously injured; when the overpressure reaches 50kPa, most buildings will collapse and the probability of survival of personnel is extremely low. By calculating the overpressure value at each location (that is, any location) in the explosion overpressure field, the overpressure value that can cause serious injury to personnel or serious damage to facilities is used as the boundary to determine the accident range.

[0116] It is understandable that the division of accident points is based on different overpressure values. For example, the accident area can be divided into multiple areas according to the intensity of the explosion wave, and each area corresponds to different overpressure values ​​and accident points. Based on the explosion overpressure values ​​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 point caused by each secondary explosion:

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

[0118] Optionally, the selection of accident points can be, for example, to divide the accident range into regular grids, such as 5m×5m or 10m×10m as a grid unit, and the center of each grid is an accident point; or some key locations can be used as accident points according to the actual situation of the accident site, such as important equipment around the accident source, personnel concentration areas, firefighting facilities, etc. Around these key locations, the distribution of accident points can be appropriately encrypted 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 go into details here.

[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 according to the death probabilities of personnel corresponding to the multiple accident points.

[0121] Among them, since only when a secondary accident occurs will the explosion overpressure field corresponding to the secondary accident be generated, and then the overpressure field will cause death, it is necessary to adjust the probability of death by the probability of secondary accident occurrence to obtain a more accurate probability of death. Through the domino effect probability of each energetic device being damaged by the initial accident at different times, and the probability field of death of each energetic device once an explosion accident occurs, the probability distribution field of death of people under the action of the initial accident can be calculated.

[0122] It can be understood that the accident range can be divided into a grid, each grid cell represents a small geographical area (i.e., the accident point area), and the resolution of the grid can be determined according to the scope and accuracy requirements of the accident impact. For each accident point, the calculated adjusted probability of death is distributed to the adjacent grid cells according to its location and impact range. Specifically, spatial interpolation methods (such as inverse distance weighted interpolation, Kriging interpolation, etc.) can also be used to more smoothly distribute probability values. The choice of interpolation method can be determined based on the characteristics and accuracy requirements of the accident impact, and this scheme is not limited here. If a grid cell is affected by multiple accident points, the maximum probability of death of people generated by these accident points in the cell can be selected as the probability value of the cell (following the "most unfavorable principle", that is, as long as there is an accident point that may cause death, the people in the cell may face the risk of death). The probability of death of people in all grid cells is combined to form a complete probability distribution field.

[0123] Optionally, the visualization function of the software can be used to display the data on the probability of death of personnel in the form of a thematic map to represent the risk distribution within the accident range. For example, the probability of death of personnel in different areas can be represented by color gradients to form a first probability of death distribution field. Red areas can represent areas with high probability of death, and blue areas represent areas with low probability of death, which can intuitively present the spatial distribution of the probability of death of personnel within the accident range. It can also be displayed using contour maps. The denser the contour lines, the greater the change in the probability of death of personnel.

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

[0125] Among them, the emergency rescue point is used to indicate the task point for emergency rescue personnel to carry out rescue in the process of chemical accident rescue. By combining the actual emergency rescue point location and the personnel death probability contour map, various potential paths are drawn, and each path is analyzed to clarify the distance required from the rescue location point to the acceptable death 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 conditions of the accident site, including but not limited to factors such as the type of accident, scope of harm, degree of harm, topography, wind direction, etc. For example, emergency rescue points can be selected based on the following conditions: located upwind or crosswind of the accident site to prevent rescuers from being harmed by toxic and harmful gases; convenient for the entry and exit and parking of rescue vehicles to ensure the rapid deployment of rescue materials and equipment; equipped with stable communication equipment to ensure smooth communication with the command center and other rescue points, etc.

[0129] According to the actual location of the emergency rescue point and the death probability contour map constructed in the above steps, multiple rescue paths leading to the rescue point are determined. The paths should include the main rescue path and the backup rescue path to ensure that there are other paths to choose from when the main path is blocked.

[0130] It is understandable that the first path priority of each rescue path is determined based on factors such as the path's capacity, safety, and distance from the accident site. Paths with strong capacity, high safety, and close distance to the accident site should be given higher priority. Using the rescue path with the highest first path priority as the departure path can ensure that rescuers can quickly evacuate the accident site when necessary. This is because after the rescue operation is completed, it is crucial to ensure that rescuers can evacuate the accident site in the fastest and safest way, and the path with the highest priority usually has advantages in terms of safety and efficiency.

[0131] Optionally, after the departure path is determined, the second path priority of the remaining rescue paths is re-evaluated. In addition to the risk and efficiency factors mentioned above, the evaluation factors at this time also need to consider the complementarity and connectivity with the departure path. Priority is given to those paths that complement the departure path in terms of direction, passing area, etc. For example, if the departure path is mainly along the road on the east side of the factory, then the path on the west side and at a certain distance from the departure path may have a higher second path priority, which can provide rescue channels in different directions and increase the flexibility of rescue. Evaluate the connection between the path and the emergency rescue point, the location of rescue resources, and the possible evacuation direction of personnel. The second path priority is higher for the path that is smoothly connected to the emergency rescue point, easy to obtain rescue resources, and in line with the evacuation direction of personnel. For example, if a path directly connects the emergency rescue point and the main evacuation channel for personnel, and there are fire water sources and emergency material storage points along the way, then the path has a higher priority in this regard.

[0132] Specifically, weights can be assigned to each path influencing factor, and weighted calculations can be performed based on the evaluation results of each factor to obtain a comprehensive score for each rescue path. The higher the score, the higher the path priority. For example, for the departure path priority, the influencing factors mainly include the probability of death, rescue time, and degree of danger. Assuming that the weight of the probability of death is 0.5, the weight of the rescue time is 0.3, and the weight of the degree of danger is 0.2, path X scores 80 points (out of 100 points) in terms of probability of death, 70 points in terms of rescue time, and 75 points in terms of degree of danger, then the comprehensive score of path X can be obtained by comprehensive weighting to be 76 points. 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 the 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 in 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] Among them, the second probability distribution field of death of personnel is used to indicate the probability distribution field of death caused by secondary accidents caused by chemical accidents in secondary accident facilities. By determining the specific type of chemical facilities, such as storage tanks, reactors, pipelines, or other special equipment, as well as the types, quantities, and physical and chemical properties of chemicals stored or being processed in the facility. The properties of substances include boiling point, flash point, explosion limit, toxicity, etc. Combined with the determined initial thermal radiation damage field, the response of the facility under the action of thermal radiation is analyzed, and the probability of secondary accidents is determined based on the domino effect.

[0138] It is understandable that based on the facility information of the secondary accident facility, the accident type of the secondary accident can be estimated, and based on the accident type and facility information, the explosion overpressure field of the secondary accident can be determined if the secondary accident facility causes thermal radiation in the initial accident. Similarly, in the case of a secondary accident, a new thermal radiation injury field or explosion overpressure field will appear, and then a secondary accident under the secondary accident (that is, a level 3 accident relative to the initial accident) will occur. The probability of the secondary accident can be determined based on the domino effect calculation, and the corresponding accident consequence model can be used according to the accident type of the secondary accident to determine the explosion overpressure field of the secondary accident, and then determine the probability distribution field of death of personnel in the secondary accident, that is, the second probability distribution field of death of personnel corresponding to the secondary accident facility.

[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 method for determining the chemical accident emergency rescue path 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] Among them, we can consider the situation where multiple secondary accident factors may exist at the same time and interact with each other, and use appropriate methods to comprehensively calculate the probability of death. We can use probability superposition method, joint probability method, etc. to combine the death probabilities caused by different factors. For example, in a scene where fire and explosion occur at the same time, we first calculate the death probabilities caused by fire thermal radiation and explosion overpressure separately, and then calculate the comprehensive death probability by joint probability method.

[0142] It is understandable that the two distribution fields can be superimposed by means of a unified 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 unit 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 meters as the unit, then the second probability distribution field of death must also use the same setting.

[0143] By weighted superposition of the death probability distribution fields of the first and second personnel, a more accurate death probability distribution field can be obtained. This processing method can comprehensively consider the different risks of the two types of personnel and ultimately provide a more accurate risk assessment map for emergency decision-making, personnel evacuation and post-disaster assessment.

[0144] In a possible implementation, in actual situations, if the explosion intensity of a domino effect accident (explosion accident) is large enough, the next level of domino effect will be further formed due to the effects of shock waves and fragment damage. According to the actual accident needs, multiple rounds of prediction can be repeated, where the first step is replaced with the explosion scene. The death probability distribution field formed in the nth step is superimposed on the death probability distribution field of the previous cycle layer. The position points with equal probability values ​​are connected to obtain probability contour lines.

[0145] Specifically, points with the same probability value are connected into contour maps, which can clearly show the levels of death risk in different areas. For example, a point with a death probability of 0.5 forms a contour line, indicating that the death risk in this area is relatively high, while a contour line with a death probability of 0.1 represents 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 death probability contour map, which can be used to show the scope of the accident impact and the gradually expanding risk area. Through the generated contour map, decision makers can more intuitively understand the scope and severity of the accident impact.

[0146] The method for determining the emergency rescue path for chemical accidents provided in the embodiment of the present application can accurately predict the spread and secondary impact of accidents based on the gradually superimposed domino effect accident simulation method, and can provide a more detailed risk assessment through the superposition of the death probability distribution field. By generating contour lines with equal probability values, it can help plan emergency response and resource allocation to ensure that the damage caused by the accident is minimized.

[0147] Figure 5 The schematic diagram of the structure of the device for determining the emergency rescue path of a chemical accident 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, and the initial accident facility is used to indicate the first chemical facility where the chemical accident first occurs;

[0149] The determination module 501 is also used to determine the secondary accident probability and explosion overpressure field of multiple other chemical facilities around the initial accident facility based on the initial thermal radiation damage field;

[0150] The determination module 501 is further used to determine the probability distribution field of the first death of personnel within the accident range corresponding to the chemical accident based on the secondary accident probability and the explosion overpressure field, wherein the first death probability field is used to indicate the probability distribution field of the death of personnel caused by the secondary accident caused by the chemical accident;

[0151] The determination module 501 is further used 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 also used to determine the initial accident facility of the chemical accident and the corresponding chemical accident type, and the chemical accident type includes but is not limited to: pool fire, jet fire;

[0154] The determination module 501 is also used to determine the corresponding accident consequence model based on the chemical accident type;

[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 used to determine the 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 point is used to indicate any point within the accident range;

[0157] The determination module 501 is further used to determine explosion overpressure values ​​of multiple accident points and corresponding probability of death of personnel, wherein the probability of death of personnel is used to indicate the probability of death of personnel caused by secondary accidents caused by the chemical accident;

[0158] The determination module 501 is further used to obtain a first probability distribution field of death of personnel within the accident range according to the probability of death of personnel corresponding to multiple accident points.

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

[0160] The determination module 501 is further used 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 plurality of other chemical facilities as a secondary accident facility;

[0162] The determination module 501 is further used to determine a second probability distribution field of death of personnel corresponding to the secondary accident facility, where the second probability distribution field of death of personnel is used to indicate the probability distribution field of death of personnel caused by a secondary accident caused by a chemical accident occurring in the secondary accident facility;

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

[0164] In a possible implementation, the emergency rescue path includes: an approach path and an exit path, and the determination module 501 is further used to determine the emergency rescue point of the chemical accident, and determine multiple rescue paths according to the first personnel death probability distribution field, and the emergency rescue point is used to indicate the task point for emergency rescue personnel to perform rescue in the chemical accident rescue process;

[0165] The determination module 501 is further used 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 a possible implementation, 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 corresponding to the departure path, the path length, and the degree of hazard of the 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 effect are similar, and this embodiment will not be repeated here.

[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] In a specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

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

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

[0172] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0173] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or 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 above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage 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 memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general 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 a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: 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 only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

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

[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 the function is implemented in the form of 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 part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0182] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0183] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or conventional techniques in the art not disclosed by the present invention, is not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof.

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 and an initial thermal radiation injury field of the chemical accident, wherein the initial accident facility is used to indicate a first chemical facility where a chemical accident first occurs; Determining 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; Based on the secondary accident probability and the explosion overpressure field, determining a first probability distribution field of death of personnel within the accident range corresponding to the chemical accident, wherein the first probability distribution field of death of personnel is used to indicate the probability distribution field of death of personnel caused by a secondary accident caused by the chemical accident; Based on the first personnel death probability distribution field, an emergency rescue path for the chemical accident is determined.

2. The method according to claim 1, characterized in that The determination of the initial accident facility and the initial thermal radiation damage field of the chemical accident includes: Determine the initial accident facility of the chemical accident and the corresponding chemical accident type, the chemical accident type is not limited to: pool fire, jet fire; The 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.

3. The method according to claim 1, characterized in that Determining the probability distribution field of the first death of a person within the accident range based on the secondary accident probability and the explosion overpressure field includes: Based on the explosion overpressure field, determining the 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; Determine explosion overpressure values ​​and corresponding death probabilities of multiple accident points, wherein the death probability of personnel is used to indicate the probability of death of personnel caused by secondary accidents caused by the chemical accident; According to the death probabilities corresponding to the multiple accident points, a first death probability distribution field within the accident range is obtained.

4. The method according to claim 3, characterized in that The determining of the probability of death of personnel corresponding to the plurality of accident points comprises: Determining the ideal probability of death of personnel corresponding to the multiple accident points according to the explosion overpressure values ​​of the multiple accident points; Based on the secondary accident probability and the multiple ideal death probabilities, the death probabilities corresponding to the multiple accident points are obtained.

5. The method according to claim 3 or 4, 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 death of personnel corresponding to the secondary accident facility, wherein the second probability distribution field of death of personnel is used to indicate a probability distribution field of death of personnel caused by a secondary accident caused by a chemical accident occurring in the secondary accident facility; The first personnel death probability distribution field and the second personnel death probability distribution field are superimposed to obtain a processed first personnel death probability distribution field.

6. The method according to claim 1, characterized in that The emergency rescue path includes: an approach path and an exit path. The emergency rescue path of the chemical accident is determined based on the first personnel death probability distribution field, including: Determine an emergency rescue point for a chemical accident, and determine multiple rescue paths based on the first personnel death probability distribution field, wherein the emergency rescue point is used to indicate a task point for emergency rescue personnel to perform rescue during the chemical accident rescue process; The first path priority of each rescue path is determined, and the rescue path with the highest first path priority is used as the departure path, wherein the first path priority is determined based on the path length of the rescue path and the degree of path hazard.

7. The method according to claim 6, characterized in that The method further comprises: 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.

8. A device for determining a chemical accident emergency rescue path, characterized in that: The device comprises: A determination module, used to determine the initial accident facility and the initial thermal radiation injury 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; The determination module is further used to determine the secondary accident probability and explosion overpressure field of multiple other chemical facilities around the initial accident facility based on the initial thermal radiation damage field; The determination module is further used to determine a first probability distribution field of death of personnel within the accident range corresponding to the chemical accident based on the secondary accident probability and the explosion overpressure field, wherein the first probability distribution field of death of personnel is used to indicate a probability distribution field of death of personnel caused by a secondary accident caused by the chemical accident; The determination module is further used to determine the emergency rescue path of the chemical accident based on the first personnel death probability distribution field.

9. 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 7.

10. 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 7 when executed by a processor.

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